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Tai, Akira, Akihiro Hashimoto, Takuya Oba, Kazuki Kawai, Kazuaki Otsuki, Hiromitsu Nagasaka e Tomonori Saita. "Growth of Mangrove Forests and the Influence on Flood Disaster at Amami Oshima Island, Japan". Journal of Disaster Research 10, n. 3 (1 giugno 2015): 486–94. http://dx.doi.org/10.20965/jdr.2015.p0486.
Testo completoAbstract (sommario):
“Mangrove” is the generic name for plants growing on tropical and subtropical tidal flats. The mangrove is used for many things, including disaster protecting land from high waves and tides and tsunamis, cleaning rivers and drainage containing soil and sand, and providing a variety of organisms with living space. Climate change and rising sea levels are threatening the future of the mangrove. Developing effective ways to conserve mangroves is thus needed, but more must be known about how the mangrove’s ecology and how it develops. It has been pointed out, for example, that mangroves increased flooding by the Sumiyo River in Amami Oshima. We studied ways to develop the mangrove at the Sumiyo River mouth in Amami Oshima and its influence in local flooding, finding that the current mangrove forest had little influence on flooding and that sediment deposition accelerating in Sumiyo Bay due to a sea dike could enlarge the mangrove forest in future.
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Ati, Restu Nur Afi, Terry L. Kepel, Mariska A. Kusumaningtyas, Nasir Sudirman, Hadiwijaya L. Salim, Tubagus Solihuddin, Aida Heriati e Eva Mustikasari. "Mangrove Bio-Ecology for Rehabilitation Purposes in Pandeglang". IOP Conference Series: Earth and Environmental Science 1148, n. 1 (1 marzo 2023): 012045. http://dx.doi.org/10.1088/1755-1315/1148/1/012045.
Testo completoAbstract (sommario):
Abstract This study aims to determine the bio-ecological condition of mangroves that could be considered for the rehabilitation planning process by the government or any other entities. This study was conducted in Ciseukeut-Panimbang, Pandeglang. Eight mangrove species were found, which belongs to four families of Avicenniaceae, Myrsinaceae, Euphorbiaceae, and Rhizophoraceae. The density of mangrove species in the study site ranges from 113-744 ind/ha. The results of the diversity index value showed that mangrove vegetation was in the low category with a range of 0.04 – 0.16. This value indicates the presence of environmental pressures, so the mangrove ecosystem is considered unstable. The dominance index belongs to the low category with a range of 0.03 - 0.23. The uniformity index value is also low at 0.01-0.08. The value shows that the mangrove ecosystem in Ciseukeut Panimbang Village is experiencing pressure, or its condition has decreased. Efforts to rehabilitate mangroves in Panimbang regency can be done by planting from the dominant mangroves Avicennia sp and Rhizophora sp. These species play a very important role in Panimbang, its important value index was 90,66% and 56,77%. The timing of planting propagules in Pandeglang area should be carried out in the eastern season so that the propagule can grow optimally and safely inundate from tides that occur in the western season with a height of up to 1 m.
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Raju Aluri, Jacob Solomon. "Reproductive Ecology of Mangrove Flora: Conservation and Management". Transylvanian Review of Systematical and Ecological Research 15, n. 2 (1 dicembre 2013): 133–84. http://dx.doi.org/10.2478/trser-2013-0026.
Testo completoAbstract (sommario):
ABSTRACT Mangroves are dynamic and unique inter-tidal ecosystems, common in tropical and subtropical coastal environments. They are among the world’s most productive ecosystems and are important in protecting coasts from erosion by fierce tides, in promoting the diversity of marine organisms and fisheries by contributing a quantity of food and providing favourable habitats for animals. These economic uses of mangroves indicate that they play an important role in the lives and economies in the coastal regions of different countries. Mangrove forests are under immense threat worldwide due to their multiple economic uses and alterations of freshwater inflows by various upstream activities in catchment areas. Mangrove plants with unique adaptations play a crucial role in sustaining life in mangrove forests. Their reproductive biology is central to understanding the structural and functional components of mangrove forests. The success of sexual reproduction and subsequent population expansion in mangrove plants is linked to flowering timings, pollinators and tidal currents. Viviparous and cryptoviviparous plants are true mangroves while non-viviparous ones are mangrove associates. The dispersal propagule is seedling in viviparous and non-viviparous plants while it is seed in nonviviparous plants. In this study, viviparous and crypto-viviparous species were included for study. These species are self-compatible, self-pollinating and also cross-pollinating; such a breeding system is a requirement for the success of sexual reproduction and subsequent build up and expansion of population. They are entomophilous in the study region. The viviparous plants include Ceriops tagal, C. decandra, Rhizophora apiculata, R. mucronata, Bruguiera gymnorrhiza and B. cylindrica. The non-viviparous plants include Avicennia alba, A. marina, A. officinalis, Aegiceras corniculatum and Aegialitis rotundifolia. Sexual reproduction and regeneration events are annual in these plants and are dependent on local insects, tidal currents and nutrient content in estuarine environment. In recent times, erratic and insufficient rainfall together with industrial pollutants released into rivers is causing negative effects on the growth, development and regeneration of mangrove flora. In effect, there is a gradual decrease in mangrove cover. Added to this is continuous exploitation of mangrove plants for fuel wood, creation of shelters for cattle and changes for industrial establishments and aquaculture development in estuarine regions. As a consequence, the existing mangrove cover is struggling to survive and also not in a position to support local needs and provide livelihood opportunities through fishery resources. Further, reduced mangrove cover is showing catastrophic effects on fishing communities who live along the shore line during the period of cyclonic surges and tsunami events.
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Padmakumar, Vidya, e Murugan S. "Mangrove ecology and species distribution along the Gorai Creek of Mumbai coast, Maharashtra, India". International Journal of Forest, Animal And Fisheries Research 6, n. 4 (2022): 22–26. http://dx.doi.org/10.22161/ijfaf.6.4.4.
Testo completoAbstract (sommario):
The extensive mangrove forest of Gorai Creek, Mumbai coast, has recently seen substantial deterioration. The results of a study on mangrove diversity conducted in Gorai Creek on the Mumbai coast from June 2017 to May 2018 are presented here. During the course of the study, twelve species of mangroves from five families and eight genera were identified in each of the three study locations along the creek. Avicennia marina accounted for 13.44% of the Gorai creek marshes, confirming its predominance. Sonneratia alba, Avicennia officinalis, Rhizophora apiculata, Bruguiera cylindrica, Kandelia candel, and Acanthus ilicifolius are among the mangrove species found in the estuarine embayment, with other species strewn around. A diverse range of species, including endangered migratory birds and herpetofauna, can be found in these mangrove environments. Mangroves have been observed to have narrowed in density with time, and it is critical to begin conservation efforts as speedily as humanly possible.
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Payne, Nicholas Leslie, e Bronwyn May Gillanders. "Assemblages of fish along a mangrove - mudflat gradient in temperate Australia". Marine and Freshwater Research 60, n. 1 (2009): 1. http://dx.doi.org/10.1071/mf08124.
Testo completoAbstract (sommario):
Mangroves are considered to support rich assemblages of fish and invertebrates. Fishes inhabiting mangrove habitats and at various distances from mangroves across mudflats were sampled to: (1) compare fish assemblages between habitats; and (2) determine the influence of mangrove proximity on fish abundance and diversity in three southern Australian estuaries between November 2005 and January 2006. Based on their distribution, fish species were classified as mangrove residents, mudflat residents, generalists or rare species. The assemblage structure of fish in mangroves differed from assemblages 500 m away; however, neither total abundance nor species richness differed significantly between mangroves and mudflats. Mangrove residents and Aldrichetta forsteri (yellow-eyed mullet) displayed strong associations with mangrove habitats, whereas mudflat residents were associated with mudflat habitats. No other fish groups or individual species occurred in higher abundances in either habitat. Total fish abundance, mangrove residents and A. forsteri were positively correlated with pneumatophore density, indicating that the structural complexity of the mangroves might influence the distributions of certain fish species. The current study demonstrated that mangrove habitats in temperate Australia support no greater abundance or diversity of fish than adjacent mudflat habitats and that mangrove proximity does not influence fish distribution at a habitat scale.
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P, Rohini, e Ayona Jayadev. "Impacts of Microplastics on Mangroves - A Review". International Journal of Research and Review 10, n. 10 (9 ottobre 2023): 22–27. http://dx.doi.org/10.52403/ijrr.20231004.
Testo completoAbstract (sommario):
Microplastics are an escalating pollutant that poses risks to the health of both marine and terrestrial environments. These tiny plastic particles have multiple avenues to infiltrate marine ecosystems, including mangrove forests. Notably, mangrove areas exhibit distinct ecological characteristics, leading to varying levels of microplastic contamination compared to other coastal locations. The unique way in which mangrove plants crisscross in the water creates an efficient filtering system, effectively reducing wave energy and turbulence. This, in turn, creates an environment where plastics are more likely to accumulate. Additionally, this accumulation can trigger the production of secondary microplastics through physical processes. Consequently, microplastic pollution is notably high along mangrove zones, impacting mangrove ecology both directly and indirectly. Research studies have demonstrated that varying degrees of microplastic absorption and subsequent translocation in plants can affect plant morphology, physiology, biochemistry, and genetic traits. An analysis of mangrove health has indicated that the presence of microplastic pollution has led to deteriorating or unsatisfactory conditions in all mangrove vegetation. This review is primarily focused on elucidating the impact of microplastics on mangroves. Keywords: Mangroves Ecosystem, Microplastics, Mangroves, Pollution impact.
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Nuraeni, Eni, e Yayan Wahyu C. Kusum. "The role of community-based tourism for mangroves conservation in Banten, Indonesia". Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 13, n. 4 (5 dicembre 2023): 606–12. http://dx.doi.org/10.29244/jpsl.13.4.606-612.
Testo completoAbstract (sommario):
Mangroves provide multiple ecological functions such as connectors and balancers of land and sea ecosystems. The presence of mangroves in coastal areas is very important for reducing the impact of tsunamis and tidal flooding. The role of local communities in the form of community-based tourism models, in conserving mangrove forests has not been extensively studied. This study aims to fill the gap in evaluating local communities’ involvement, particularly under the tourism-based communities’ model, in conserving mangroves and, at the same time, gaining economic benefits. This study was conducted in the mangrove villages of “Patikang,” Citeureup Village, and Pandeglang Regency. This study applied mixed methods that combine both quantitative and qualitative approaches. Primary data were obtained directly from the local community through using questionnaires, interviews, and field observations. Secondary data collection was carried out through a literature review of mangrove conservation and community development in coastal areas. Our study found that local community-based tourism namely “Putri Gundul” played a very important role in increasing community awareness to conserve mangrove forests. The community has gained more knowledge on the biology of mangrove species and the ecology of mangroves for mangrove restoration. Furthermore, the involvement of local communities in mangrove conservation and restoration can increase the economy of communities by producing various products from mangroves.
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PURWANTI, Pudji, Mochammad FATTAH, Vika Annisa QURRATA e Bagus Shandy NARMADITYA. "AN INSTITUTIONAL REINFORCEMENT MODEL FOR THE PROTECTION OF MANGROVES SUSTAINABLE ECOTOURISM IN INDONESIA". GeoJournal of Tourism and Geosites 35, n. 2 (30 giugno 2021): 471–79. http://dx.doi.org/10.30892/gtg.35227-674.
Testo completoAbstract (sommario):
This study aims at examining the sustainability of mangrove ecotourism at Cengkrong Mangroves Ecotourism in Indonesia. A quantitative approach was adopted to capture the complexity of the phenomenon. The study was conducted in an area with most mangroves in Indonesia, including Cengkrong Ecotourism in Trenggalek, East Java. Sustainability is achieved when each stakeholder makes a positive contribution to others in ecology, economy, social, institutional and law enforcement, and technology. Using multi-dimensional scaling and Monte Carlo approach, the findings of this study indicate that Cengkrong mangrove ecotourism is classified as “sustainable” (76.20%). The highest dimension is ecology due to the minimum level of pollution in the area. Even Cengkrong beach mangrove is a tourist destination which is potentially polluted by the tourist; however, the area is not densely populated. Nevertheless, amongst the other indicator, social is the lowest (67.95%).
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Limmon, Gino V., Eelco Waardenburg, Wouter Lengkeek, Peter Vodegel, Krisye e Yunita A. Noya. "RESTORASI EKOSISTEM MANGROVE PADA MEDIA BIODEGRADABLE DI PESISIR DESA WAAI". MESTAKA: Jurnal Pengabdian Kepada Masyarakat 2, n. 2 (24 aprile 2023): 99–103. http://dx.doi.org/10.58184/mestaka.v2i2.39.
Testo completoAbstract (sommario):
Mangroves are plants that live on the coast and are affected by sea tides. Mangroves play an important role in estuary areas, namely the border between seawater and fresh water because they have ecological, economic and chemical functions to support the life of organisms. Mangrove ecosystems can experience threats from both natural and human factors. Human activities that cause damage to mangroves are due to a lack of public awareness regarding the importance of mangrove ecosystems for organisms. This is the condition that occurs in the mangrove ecosystem in Waai Village, therefore, it is necessary to restore the mangrove ecosystem. Mangrove ecosystem restoration uses one of the potential media, namely BESE-Element, which is a biodegradable material. Community service is carried out in collaboration with the Pattimura University Maritime Center and Wardenburg Ecology International. The community service activities were carried out for two days, 7-8 February 2023. The result of the activity was that mangrove ecosystem restoration was carried out in semi-enclosed areas using 10 BESE-Element. The types of mangrove species planted were Sonneratia alba, Rhizophora stylosa, and Ceriops tagal. Around BESE-Elements planted seedlings and mangrove propagules as a control for mangroves in BESE-Elements. This restoration activity seems to be applicable not only in Waai Village but also in other areas that have experienced degradation of the mangrove ecosystem.
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Schmitz, Hermes J., Paulo R. P. Hofmann e Vera L. S. Valente. "Assemblages of drosophilids (Diptera, Drosophilidae) in mangrove forests: community ecology and species diversity". Iheringia. Série Zoologia 100, n. 2 (giugno 2010): 133–40. http://dx.doi.org/10.1590/s0073-47212010000200008.
Testo completoAbstract (sommario):
Brazilian fauna of drosophilids has been researched in various ecosystems, but those in mangrove forests remain overlooked in Brazil and elsewhere. The present study attempts to characterise the assemblages of drosophilids of this environment, based on 28 collections taken in three mangrove areas in Santa Catarina Island, southern Brazil. The three mangroves surveyed were different in their surroundings, which varied from highly urbanised areas to conservation areas with natural vegetation. Overall, 69 species were collected, and no remarkable difference was detected in species composition and abundances or in the richness, evenness and heterogeneity between sites. The species abundance distribution observed fitted to a theoretical lognormal distribution in the three mangroves. The species richness scored and the performance of the species richness estimators showed an unexpectedly high diversity, considering the very low floristic diversity and the harsh conditions of the environment. Regarding species composition and abundances, the drosophilid mangrove assemblages were shown to be more similar to those found in open environments, with a marked dominance of exotic species. Finally, considering the apparent lack of feeding and breeding sites, we suggest that mangrove forests are acting as sink habitats for the drosophilids populations.
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Epilia, Tjan Venny, e Budi A. Sukada. "PUSAT REKREASI DAN EDUKASI PEMBUDIDAYAAN MANGROVE". Jurnal Sains, Teknologi, Urban, Perancangan, Arsitektur (Stupa) 3, n. 2 (3 febbraio 2022): 2071. http://dx.doi.org/10.24912/stupa.v3i2.12376.
Testo completoAbstract (sommario):
Ecology is formed by the reciprocal relationship between living things and their environment forming an orderly system.Changes in one system will surely affect the others and disturbing the whole systems. Architecture seeks to minimize such a disturbance by building spatial quality with ecology in mind. The case of mangroves existence is taken due to its number of benefits, especially for coastal communities as well as mangrove forests being a home for all living things that stay and breed there. Sadly, not all mangroves are in good condition. Number of mangroves in Indonesia that are damaged, threatened, and neglected is increasing every year. The main cause of such destruction is conversion of land into settlements, agriculture, and industry. All of them give an impact on increasing abrasion, hence causing the land to decrease, flooding the residentials, and threating them to drown. There is an urgent need for mangrove restoration and management to prevent reduction of mangrove area. One way to do it is by providing education for the communities in concerned to increase their knowledge on the important role of mangroves so that they can be more care for such a kind of environment, being able to manage, protect and preserve its ecosystem so as to ensure its sustainability while increasing public awareness of the environment. The educational activities, on the other hand, can be collaborated with recreational activities that support nature conservation and maintain existing mangroves. With such facilities, it is hoped that mangroves can be preserved. Keywords: Education; Mangrove; Recreation AbstrakEkologi terbentuk oleh hubungan timbal balik antara makhluk hidup dengan lingkungannya membentuk suatu sistem yang teratur. Jika sistem tersebut mengalami perubahan akan mempengaruhi ekosistem lainnya dan membuat ekosistem terganggu. Arsitektur mengupayakan memperkecil gangguan yang terjadi pada ekosistem tersebut dengan membangun kualitas spasial dengan pemikiran ekologis. Keberadaan mangrove memiliki sejumlah manfaat terutama bagi masyarakat pesisir pantai. Tidak hanya masyarakat pesisir saja tetapi hutan mangrove menjadi ‘rumah’ bagi semua makhluk hidup yang hidup dan berkembangbiak disana. Namun tidak semua mangrove dalam kondisi baik, saat ini jumlah mangrove di Indonesia yang dalam kondisi rusak, terancam, dan terabaikan semakin bertambah tiap tahunnya. Penyebab utama terjadinya kerusakan hutan mangrove adalah konversi lahan yang beralihfungsi menjadi pemukiman, pertambakan, dan industri yang berdampak meningkatnya abrasi yang menyebabkan daratan semakin berkurang, rumah penduduk tergenang air, dan terancam tenggelam. Perlunya pemulihan dan pengelolaan mangrove sebagai antisipasi yang dapat dilakukan mencegah berkurangnya luasan mangrove. Salah satu cara melestarikan mangrove dengan memberikan edukasi bagi masyarakat untuk meningkatkan pengetahuan akan pentingnya peranan mangrove sehingga masyarakat dapat lebih peka dan peduli lingkungan. Dengan demikian masyarakat dapat mengelola mangrove dengan baik, menjaga dan melestarikan ekosistem mangrove untuk menjamin keberlanjutannya, serta meningkatkan kesadaran masyarakat terhadap lingkungan. Kegiatan edukasi dapat dikolaborasikan dengan kegiatan rekreasi yang mendukung konservasi alam dan mempertahankan mangrove yang ada saat ini. Dengan adanya sarana berupa pusat rekreasi dan edukasi pembudidayaan mangrove diharapkan dapat membantu menyelamatkan kerusakan mangrove sehingga dapat terlestarikan.
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Reciproco, Arianne, Jennyrose Suarez, Jonalyn Padilla, John Rick Flora, Maria Cristina B. Cañada, Charles R. Velasco e Novelyn Buhong. "Awareness and Participation in Mangrove Management of Coastal Communities in Baler, Aurora, Philippines". Ecology, Environment and Conservation 29, n. 02 (2023): 928–34. http://dx.doi.org/10.53550/eec.2023.v29i02.064.
Testo completoAbstract (sommario):
Mangrove forests are among the most vulnerable ecosystems, necessitating unique protection regimes from the community through management and participation. Mangrove management is an efficient method of preserving and protecting forest functions while also providing a source of income for the surrounding communities. The study’s objective is to ascertain community awareness of mangroves and participation in mangrove management in selected areas of Baler, Aurora, and the correlations between community awareness and participation. Three hundred thirty-five civilians from four distinct communities participated in the study. The study made use of descriptive techniques such as questionnaires and field observations. The findings indicate that community awareness of mangroves is relatively high in selected coastal areas of Baler, Aurora, with a weighted mean of 3.79. It was also noted that community participation in mangrove management is moderate in the selected coastal portion of Baler, Aurora. Community awareness is positively correlated with coastal communities’ participation in mangrove management in Baler, Aurora. Furthermore, the respondents’ perceptions of the mangrove management interventions and extension programs required by the community in Baler Aurora’s selected coastal areas to include natural mangrove protection, seminars on the importance of mangrove resources, at least annual mangrove maintenance, mangrove planting, training on mangrove nursery establishment and plantation management, and mangrove nursery establishment, ranked from highest to lowest. The study concluded that the community is aware of mangroves’ characteristics, nature, and uses; they participate in mangrove management in a limited manner. Awareness has a positive effect on coastal communities’ involvement in mangrove management.
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Lugo, Ariel E., Ernesto Medina e Kathleen McGinley. "Issues and Challenges of Mangrove conservation in the Anthropocene". Madera y Bosques 20 (5 dicembre 2014): 11. http://dx.doi.org/10.21829/myb.2014.200146.
Testo completoAbstract (sommario):
This essay addresses the conservation issues facing mangroves in the Anthropocene, defined as the era of human domination over the world. We review the laws, policies, international agreements, and local actions that address the conservation of mangrove forests in the Neotropics and relate them to the Anthropocene. Collaboration between governments, non-governmental organizations, and communities that depend on mangroves for their livelihood will be critical in the Anthropocene. The essay also reviews recent developments in mangrove ecology and ecophysiology that enlighten how mangroves might respond to changes in temperature and rainfall, sea level rise, and other anthropogenic and natural disturbances. Mangroves in the Anthropocene will also face changes in their species composition given the current movement of mangroves species across continental barriers as a result of human activity. These trends will lead to novel mangrove forests and in some cases expand the range of mangroves worldwide. The solution to mangrove persistence in the Anthropocene is not to isolate mangroves from people, but to regulate interactions between mangroves and humans through effective management. We will also have to expand the scope of the ecological analysis of mangrove ecosystems to include the social forces converging on the mangroves through an analytical approach that has been termed Social Ecology. Desafíos de la conservación del mangle en el Antropoceno Este ensayo aborda los problemas de conservación que enfrentan los manglares en el Antropoceno, definido como la época de la dominación humana sobre el mundo. En él repasamos las leyes, políticas, acuerdos internacionales y las acciones locales que se ocupan de la conservación de los bosques de mangle en el Neotrópico y se relacionan con el Antropoceno. La colaboración entre gobiernos, organizaciones no gubernamentales y las comunidades que dependen de los manglares para su sustento será decisiva en el Antropoceno. El ensayo también incluye comentarios sobre los avances recientes en ecología de manglares y en ecofisiología que explican cómo los manglares podrían responder a los cambios de temperatura y precipitación, el aumento del nivel del mar y otras perturbaciones naturales y antropogénicas. Los manglares en el Antropoceno también enfrentarán a cambios en su composición de especies, dado el actual movimiento de especies de manglares a través de barreras continentales como resultado de la actividad humana. Estas tendencias conducirán a nuevas formaciones de manglares y en algunos casos ampliarán la presencia de los manglares en todo el mundo. La solución a la persistencia de manglares en el Antropoceno es no aislar a los manglares de la gente, sino regular las interacciones entre los manglares y los seres humanos a través de una gestión eficaz. También tendremos que ampliar el alcance del análisis ecológico de los ecosistemas de manglar para incluir las fuerzas sociales convergentes en los manglares a través de un enfoque analítico que se ha denominado Ecología Social.
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Alfaro, Andrea C. "Effects of mangrove removal on benthic communities and sediment characteristics at Mangawhai Harbour, northern New Zealand". ICES Journal of Marine Science 67, n. 6 (18 maggio 2010): 1087–104. http://dx.doi.org/10.1093/icesjms/fsq034.
Testo completoAbstract (sommario):
Abstract Alfaro, A. C. 2010. Effects of mangrove removal on benthic communities and sediment characteristics at Mangawhai Harbour, northern New Zealand. – ICES Journal of Marine Science, 67: 1087–1104. The spread of mangroves at many locations in temperate northern New Zealand provides a stark contrast to the well-documented trend in mangrove forest decline recorded through the tropics and subtropics. To explore this difference, improved understanding is needed of New Zealand's mangrove ecosystems and how they respond to anthropogenic disturbance. The effect of mangrove removal on the community ecology of mangrove stands and adjacent habitats was investigated within Mangawhai Estuary, northern New Zealand, between March 2004 and September 2006. The vegetation, benthic macrofauna, and sediments were sampled within habitats (marshgrass, mangrove stands, pneumatophore zones, sandflats, and channels) at a treatment site (mangroves removed) and two undisturbed sites, before and after mangrove-removal activities. Mature mangrove habitats had less total abundance and fewer taxa than all the other habitats sampled and were dominated by pulmonate snails (Amphibola crenata) and mud crabs (Helice crassa). Whereas faunal composition varied seasonally as a result of life-history dynamics, temporal changes could be attributed to mangrove-removal activities. Mangrove eradication was followed by immediate changes in the sediment from a muddy to sandier environment, which favoured an overall increase in the abundance of crabs, snails, and bivalves. However, unexpected topographic catchment reconfigurations in late 2005 may have caused a subsequent increase in the delivery of silt and organic content to the study area and an overall decrease in faunal density in March and September 2006. The study provides direct evidence of the effect of mangroves on sediment and benthic faunal characteristics and the importance of catchment-derived imports to estuarine ecosystems.
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Suryono, Suryono, Nur Taufiq-SPJ, Ibnu Pratikto e Raden Ario. "Sebaran Mangrove di Desa Bumiharjo Kecamatan Keling Kabupaten Jepara". Buletin Oseanografi Marina 9, n. 2 (14 ottobre 2020): 117–24. http://dx.doi.org/10.14710/buloma.v9i2.29067.
Testo completoAbstract (sommario):
Kabupaten Jepara memiliki potensi wilayah pesisir dengan panjang garis pantai 81,6 km. Mangrove sebagai sabuk pantai hijau memiliki sebaran di setiap kecamatan pesisir. Salah satu lokasi sebaran mangrove di pesisir Jepara berada di desa Bumiharjo Kecamatan Keling. Identifikasi potensi luasan lahan serta sebaran mangrove adalah salah upaya mengetahui potensi sumberdaya pesisir. Metode penelitian yang digunakan adalah overlay peta RBI dan peta satelit landsat 8 guna mengetahui lokasi serta luasan sebaran mangrove di lokasi penelitian.Selanjutnya dilakukan investigasi ekologi mangrove dengan Survei Lapang guna mengetahui distribusi dan kelimpahan mangrove. Hasil penelitian menunjukan bahwa hutan mangrove dilokasi penelitian adalah seluas 4,75 Ha. Hasil identifikasi komposisi jenis mangrove ditemukan sebanyak 6 spesies mangrove yaitu: Avicennia marina, Rhizophora apiculata, Rhizophora stylosa, Rhizophora mucronata, Soneratia alba, serta Soneratia muconata. Kerapatan rata-rata vegetasi mangrove berkisar antara 4000 – 10.000 individu/ha. Tegakan mangrove memiliki tinggi batang 5-6 meter, diameter batang berkisara antara 4,3- 5,0 cm. Kerapatan mangrove didominasi oleh Rhizophora mucronata. dengan kerapatan paling dominan adalah semai (Sapling). Hal ini menunjukan bahwa mangrove yang ada di desa Bumiharjo Kecamatan Keling kabupaten Jepara adalah dominan mangrove hasil replant. Jepara Regency has a potential coastal area with a coastline length of 81.6 km. Mangroves as coastal green belts have distribution in each coastal district. One of the mangrove distribution locations on the coast of Jepara is in the village of Bumiharjo, Keling district. Identification of the potential land area and the distribution of mangroves is an effort to determine the potential of coastal resources. The research method used is an overlay RBI map and satellite map Landsat 8 to determine the location and extent of the distribution of mangroves in research locations. Subsequently carried out an investigation of mangrove ecology with a Field Survey (Ground Truth) to determine the distribution and abundance of mangroves. The results showed that the mangrove forest in the study area was 4.75 Ha. The results of the identification of the composition of mangrove species were found as many as 6 species of mangroves, namely: Avicennia marina, Rhizophora apiculata, Rhizophora stylosa, Rhizophora mucronata, Soneratia alba, and Soneratia muconata. the average density of mangrove vegetation ranges between 4000 - 10,000 individuals/ha. Mangrove stand has a stem height of 5-6 meters. the diameter of the stem is between 4.3 - 5.0 cm. Mangrove density is dominated by Rizophora mucronata. with the most dominant density is the seedling (Sapling). This shows that the mangroves on the coast of the Jepara district are replanted mangrove species. (rehabilitation).
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Motamedi, Shervin, Roslan Hashim, Rozainah Zakaria, Ki-Il Song e Bakrin Sofawi. "Long-Term Assessment of an Innovative Mangrove Rehabilitation Project: Case Study on Carey Island, Malaysia". Scientific World Journal 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/953830.
Testo completoAbstract (sommario):
Wave energy and storm surges threaten coastal ecology and nearshore infrastructures. Although coastal structures are conventionally constructed to dampen the wave energy, they introduce tremendous damage to the ecology of the coast. To minimize environmental impact, ecofriendly coastal protection schemes should be introduced. In this paper, we discuss an example of an innovative mangrove rehabilitation attempt to restore the endangered mangroves on Carey Island, Malaysia. A submerged detached breakwater system was constructed to dampen the energy of wave and trap the sediments behind the structure. Further, a large number of mangrove seedlings were planted using different techniques. Further, we assess the possibility of success for a future mangrove rehabilitation project at the site in the context of sedimentology, bathymetry, and hydrogeochemistry. The assessment showed an increase in the amount of silt and clay, and the seabed was noticeably elevated. The nutrient concentration, the pH value, and the salinity index demonstrate that the site is conducive in establishing mangrove seedlings. As a result, we conclude that the site is now ready for attempts to rehabilitate the lost mangrove forest.
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Ahalya Arulnayagam. "Floral Distribution, Diversity, and Ecology of Mangrove Forests in Mandaitivu and Arali, Sri Lanka". Indonesian Journal of Social and Environmental Issues (IJSEI) 1, n. 3 (5 dicembre 2020): 151–60. http://dx.doi.org/10.47540/ijsei.v1i3.75.
Testo completoAbstract (sommario):
Mangroves in the northern parts of Sri Lanka has been understudied and often ignored by the ecologists due to several reasons. This paper contributes to the assessment of floristic diversity and community structure of mangrove forests in two sites in the Northern Province; Mandaitivu and Arali. Vegetation studies were undertaken with the use of 10m wide belt transect laid across the water-land gradient, within which, 5-7 quadrats were placed for floral identification (nMandaitivu = 67, nArali = 44). Subsurface water samples (n=57) from adjacent estuarine region were taken to assess environmental parameters. Ten true mangrove species of six families were identified altogether in both sites. Bruguiera cylindrica, Lumnitzera racemosa, Excoecaria agallocha and Avicennia marina showed higher niche width. Zonation exhibited Rhizophora in the fringing zone, Avicennia landward and the others in the mixed zone. Salinity in both areas were relatively high and showed a significantly positive correlation with mangrove abundance along with conductivity, tidal regime and pH. Despite of their important role in coastal dynamics, mangroves have been degraded due to anthropogenic activities, thus demanding actions for conservation in the future.
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Syahrial, Syahrial, e Yudi Sastriawan. "POLA SEBARAN, INDIKATOR KUALITAS LINGKUNGAN DAN EKOLOGI KOMUNITAS MANGROVE PULAU TUNDA(Distribution Pattern, Environmental And Ecological Quality Indicators Of Mangrove Forest Community Pulau Tunda)". SAINTEK PERIKANAN : Indonesian Journal of Fisheries Science and Technology 14, n. 1 (19 agosto 2018): 43. http://dx.doi.org/10.14710/ijfst.14.1.43-51.
Testo completoAbstract (sommario):
Ekosistem mangrove terdapat di seluruh pantai maupun pulau-pulau kecil Indonesia yang terpengaruh oleh pasang surut. Kajian pola sebaran, indikator kualitas lingkungan dan ekologi komunitas mangrove Pulau Tunda dilakukan pada bulan Januari 2014 dengan tujuan untuk mengetahui pola sebaran, indikator kualitas lingkungan dan ekologi komunitas mangrovenya. Sampel mangrove diambil menggunakan transek garis dan plot yang ditarik dari titik acuan (tegakan mangrove terluar) serta tegak lurus garis pantai sampai ke daratan. Kemudian transek garis tersebut dibuat petak-petak contoh (plot) yang berukuran 10 x 10 m2 untuk kategori pohon dan di dalam ukuran 10 x 10 m2 dibuat plot berukuran 1 x 1 m2 untuk kategori semai. Pola penyebaran mangrove Pulau Tunda dianalisis berdasarkan indeks Morisita. Sementara kualitas lingkungan hutan mangrove dianalisis menggunakan tutupan pohon, tutupan semai dan jumlah jenis semai yang ditemukan. Kemudian ekologi komunitas mangrove Pulau Tunda dianalisis berdasarkan indeks keanekaragaman, dominansi dan keseragaman. Hasil penelitian menunjukan bahwa pola penyebaran mangrove Pulau Tunda tergolong beraturan (regular), dimana terjadi interaksi negatif antar individu dalam memperebutkan ruang, unsur hara maupun cahaya matahari. Selain itu, kondisi hutan mangrove Pulau Tunda masih tergolong baik dengan tingkat kualitas lingkungan vegetasi mangrove 73.74%, keanekaragaman dan dominansi mangrovenya tergolong rendah (1.20 dan 0.52) dan keseragamannya tergolong labil (0.60). Mangrove ecosystems are found throughout the coast and small islands of Indonesia which are affected by tides. Distribution pattern studies, environmental quality indicators and the ecological mangrove community of Tunda Island were carried out in January 2014 with the aim to determine distribution patterns, indicators of environmental quality and ecology of the mangroves community. Mangrove samples were taken using line transects and plots drawn from reference points (outer mangrove stands) and perpendicular to the coastline to the mainland. The line transect is made of plots of sample size 10 x 10 m2 for the category of trees and in a size of 10 x 10 m2 a plot of 1 x 1 m2 is made in the seedling category. The pattern of distribution of mangroves of Tunda Island was analyzed based on the Morisita index. While the environmental quality of mangrove forests was analyzed using tree cover, seedling cover and number of seedlings found. The ecology of the Tunda Island mangrove forest community was analyzed based on the diversity index, dominance and uniformity. The results showed that the pattern of mangrove distribution of Tunda Island was regular, where there was a negative interaction between individuals in fighting over space, nutrients and sunlight. In addition, the condition of the Tunda Island mangrove forest is still relatively good with the level of environmental quality of mangrove vegetation 73.74%, the diversity and dominance of mangroves are relatively low (1.20 and 0.52) and uniformity is classified as unstable (0.60).
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Dahdouh-Guebas, F., M. Verneirt, J. F. Tack, D. Van Speybroeck e N. Koedam. "Propagule predators in Kenyan mangroves and their possible effect on regeneration". Marine and Freshwater Research 49, n. 4 (1998): 345. http://dx.doi.org/10.1071/mf97108.
Testo completoAbstract (sommario):
Grapsid crabs can play a considerable role in the predation of mangrove propagules and possibly are a threat to the regeneration of mangroves, whether natural or artificial. Experiments consisting of artificial plantation of mangrove juveniles were set up in Gazi Bay (Kenya). Grapsid crabs, particularly Neosarmatium meinerti in the most landward fringe and N. smithii and Sesarma guttatum in the middle fringe of the mangrove forest, were found to be a regeneration-limiting factor. Almost 100% (n = 40) of the landward plantations were cleared. There was a slight initial preference for Rhizophora propagules lying horizontally on the mangrove floor, which simulates the position of a stranding propagule. In Mida Creek (Kenya) the snail Terebralia palustris was observed predating mangrove propagules. This study shows that crabs may affect the regeneration potential of mangroves, and snails might also be a factor in predation. A need to actively search for ways to protect re-afforestation plots from predators of mangrove tree juveniles is necessary.
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PIMPLE, Uday. "Dynamique spatio-temporelle de la forêt de mangrove dans la province de Trat en Thaïlande". BOIS & FORETS DES TROPIQUES 353 (1 ottobre 2022): 93–94. http://dx.doi.org/10.19182/bft2022.353.a36999.
Testo completoAbstract (sommario):
In the United Nations 2021–2030 ecosystem restoration programme, coastal ecosystems such as mangroves are listed as a priority for biodiversity restoration. Therefore, understanding mangrove species diversity and changes over time are essential to predict ecosystem health, viability and resilience to changing climatic and human pressures. However, when considering future conservation ambitions and policies for mangroves, it is also crucial to understand the effects of conservation interventions. To address these concerns, we needed to develop reliable inventory methods for mangrove forests, spatialised predictions of biodiversity and good practices for using Earth observation data. In this study, we investigated the gaps in knowledge concerning the spatial organisation, intertidal zones and the recent history of mangroves in Thailand's Trat province. We investigated the impacts on forest diversification of environmental parameters, such as topography, and of human interventions such as stand rehabilitation or plantations. We were able to integrate historical multi-satellite data, current ecological data and micro-topographic measurements to establish the status and describe the spatial organisation of the mangrove forests in the Province of Trat. Using the method described in this study, we were able to overcome the technical limitations of monitoring protocols and thus develop a powerful decision-support system to assess the recovery period of mangrove forests, their structural growth and the species composition of plantations and natural native stands over three decades. Our study also identifies the main influencing factors that compromise the quality of Earth observation data, and proposes specific best practices for monitoring mangrove ecosystems. In addition, we developed the ARMA tool (Automatic Regrowth Monitoring Algorithm) and summarized functional indicators (secondary succession) by type of stand. ARMA can identify the years of planting, recovery period, age and structural development of rehabilitated mangroves compared to adjacent natural and naturally regenerating mangroves. We believe that our study makes a significant contribution to research on mangrove biodiversity, as it has several potential applications for forest restoration planning and management. It can therefore be a useful tool to measure and assess biodiversity and thereby improve ecosystem-based mangrove forest management.
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Beitl, Christine M. "Shifting policies, access, and the tragedy of enclosures in Ecuadorian mangrove fisheries: towards a political ecology of the commons". Journal of Political Ecology 19, n. 1 (1 dicembre 2012): 94. http://dx.doi.org/10.2458/v19i1.21719.
Testo completoAbstract (sommario):
After decades of mangrove deforestation for the development of shrimp farming, the Ecuadorian state began to officially recognize the ancestral rights of traditional users of coastal mangrove resources in the late 1990s. This article traces the trajectory of coastal policy change and the transformation of mangrove tenure regimes from an implicit preference for shrimp aquaculture to a focus on conservation and sustainable development with greater community participation through the establishment of community-managed mangrove areas called custodias. I argue that while the custodias have empowered local communities in their struggle to defend their livelihoods and environment against the marginalizing forces of global shrimp aquaculture, the implementation of common property arrangements for mangrove fishery management has changed the nature of property rights, the distribution of resources, and social relations among collectors of mangrove cockles (Anadara tuberculosa and A. similis). I suggest a need to develop a political ecology of the commons, an analytical approach applied here to examine the fundamental shift in the nature of the struggle over mangrove resources, from artisanal fishers versus shrimp farmers to a struggle between compañeros: members of associations versus independent cockle collectors. Such a shift in the struggle over resources threatens to undermine the sustainability of the fishery. I conclude that shifting access may be an important underlying factor contributing to a tragedy of enclosures in Ecuador's mangrove cockle fishery.Keywords: political ecology; property rights; common property; access; tragedy of enclosures; shrimp aquaculture; mangroves; artisanal fisheries; Anadara spp., Ecuador
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Limmon, Gino V., Rahman Rahman e Frijona Fabiola Lokollo. "PEMANFAATAN MATERIAL BIODEGRADABLE (BESE-ELEMENT) SEBAGAI MEDIA RESTORASI MANGROVE DI PESISIR NEGERI PASSO, KOTA AMBON". J-ABDI: Jurnal Pengabdian kepada Masyarakat 2, n. 10 (4 marzo 2023): 6675–80. http://dx.doi.org/10.53625/jabdi.v2i10.5192.
Testo completoAbstract (sommario):
Mangrove ecosystems have potential both ecologically, economically, physically, and chemically. The abundance of this potential causes pressure from anthropogenic activities, which results in the degradation of mangrove ecosystems. Several mangrove ecosystems in the Ambon City area have experienced degradation, so restoration is necessary. The Passo State area has the potential for a dense mangrove ecosystem and can be used as a nursery area to support other ecosystems. Increasing the potential of mangrove ecosystems in the Passo State area can be done through restoration using biodegradable materials (BESE-Elements). Mangrove restoration is carried out through community service activities, a collaboration between the Maritime Center and Wardeen Burg Ecology – The Netherlands. The result of the activity is that mangrove ecosystem restoration is carried out in semi-enclosed areas using 10 BESE-Element. Each BESE-Element was planted with 10 mangrove seedlings consisting of 5 seedlings and 5 propagules. The mangrove species planted were Bruguiera gymnorrhiza, Rhizophora apicutala, and Rhizophora stylosa. Around BESE-Elements planted seedlings and mangrove propagules as a control for mangroves in BESE-Elements.
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Astuti, Rika, e Eka Lisdayanti. "PENANAMAN MANGROVE SEBAGAI UPAYA PELESTARIAN EKOSISITEM PESISIR DI GAMPONG LAMTUTUI, PEUKAN BADA, KABUPATEN ACEH BESAR PROVINSI ACEH". Marine Kreatif 6, n. 2 (22 novembre 2022): 93. http://dx.doi.org/10.35308/jmk.v6i2.6547.
Testo completoAbstract (sommario):
Mangroves are biological natural resources that have the potential to provide benefits for human life and aquatic biota organisms. Mangrove ecosystems have ecological and economic functions in coastal areas. The Gampong Lamtutui area has an important role because it is a provider of natural resources and environmental services with great potential in terms of ecology, economy and tourism. So far, the activities that occur in the mangrove ecosystem area in Lamtutui have an unfavorable impact on the mangrove vegetation in that location, due to the large number of uses of the mangrove area for vannamei shrimp pond areas, so that the structure of mangrove vegetation at various growth levels changes. The purpose of this service is to raise awareness and motivation for the coastal communities of Gampong Lamtutui to replant mangroves as a form of concern for the preservation of coastal ecosystems. This service activity is carried out for two days, from October 30, 2021 to October 31, 2021. The location of this service is in Gampong Lamtutui, Peukan Bada District, Aceh Besar Regency. The method of activity used in this activity is counseling and mentoring mangrove planting. The results of this service activity are the planting of 1,000 stems of Rhizophora sonneratia mangrove tree seeds in Gampong Lamtutui, as well as the establishment of cooperation with a group of local fishermen for monitoring the mangrove trees that have been planted.
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Ajonina, Gordon, e Jean-Hude E Moudingo*. "Inclusive Understanding of Nypa Fruticans Wurmb as an Invasive Mangrove in West and Central Africa". Journal of Biomedical Research & Environmental Sciences 5, n. 4 (aprile 2024): 321–23. http://dx.doi.org/10.37871/jbres1899.
Testo completoAbstract (sommario):
Mangroves have been widely described and known as a group of salt-tolerant pantropical trees or shrubs species thriving in intertidal zones between dry land and open sea. Several remarkable studies have been evolved in mangrove flora ecology and its function, disturbances and modelling dynamics [1], rebuilding mangrove resilience through community efforts [2]. And mitigate fuel wood used by improved smoke house [3], as well as its environmental and socio-economical fallouts. However, little and or inadequate attention has been paid on to check why Nypa fruticans along mangrove of West and central Africa, and the world in General. In this light, the short communication provide additional invasive trait information, which will assist eco-physiologist, botanist, and others to undertake practical mangrove conservation work.
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Hilmi, Endang, Uus Usman e Achmad Iqbal. "The External, Internal Factor and Ecosystem Services to Support Mangrove Rehabilitation Planning in North Coast of Jakarta". Proceeding ICMA-SURE 2, n. 1 (14 febbraio 2023): 186. http://dx.doi.org/10.20884/2.procicma.2023.2.1.7783.
Testo completoAbstract (sommario):
The mangrove ecosystem on North Coast of Jakarta has many services and function both of ecology, social and economic function and services, including the tidal flooding reduction, land subsidence reduction, pollution reduction, ecotourism and others. However, the mangrove ecosystem in North Coast of Jakarta Mangroves are being badly damaged, so require effort and activity to rehabilitate. This research aimed to develop rehabilitation strategy of mangrove ecosystem in North Coast of Jakarta to reduce coastal disaster and to support ecosystem services. The methods of this research used IFAS, EFAS analysis and Buchard analysis. The results showed that the ecosystem services of mangrove ecosystem were are ecotourism, conservation, wildlife reserves, reduction of tidal flooding, abrasion and accretion, reduction of intrusion, reduction of land subsidence, economic income, fishing and fishpond activities, pond activities, and social benefits. The strategy of mangrove rehabilitation was weakness-opportunity strategy (minimalizing weakness, taking advantage of opportunities, and avoid threats. The strategies of mangrove rehabilitation plaaning were mangrove rehabilitation, mangrove revitalization, support creative economy, developing greenbelt, increasing human resources and developing blue carbon
26
Woodroffe, C. D. "Mangrove response to sea level rise: palaeoecological insights from macrotidal systems in northern Australia". Marine and Freshwater Research 69, n. 6 (2018): 917. http://dx.doi.org/10.1071/mf17252.
Testo completoAbstract (sommario):
Accelerated sea-level rise threatens coastal wetlands; it is unclear whether sediment accretion beneath mangroves will be sufficient to keep pace. A conceptual framework, used to describe the response of reefs, can also be applied to mangroves, discriminating drowning or back-stepping with rapid rise from keep-up or catch-up under moderate rates. In macrotidal estuaries of northern Australia, different mangrove species grow across particular elevation ranges and accretion rates decrease with tidal elevation. Palaeoecological reconstructions, from drilling, dating and pollen analysis, record mangrove distribution over past millennia. Estuarine plains are underlain by a vertically continuous stratigraphy of muds, implying continuity of widespread ‘big swamp’ mangrove forests during decelerating stages of post-glacial sea-level rise c. 7000 years ago. In contrast, on higher-energy open coasts, mangroves back-stepped, but re-established as the shoreline prograded when the nearshore built to suitable elevation: a catch-up mode. These results demonstrate that mangrove response to sea-level rise has varied, determined by the availability of sediment and the oceanographic processes by which it is redistributed. How mangrove forests adjust in future will also vary as a function of local topography and sediment availability. Extensive plains flanking estuarine systems are particularly vulnerable to tidal creek extension and saline incursion under future higher sea levels.
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Kalasuba, Karina, Mia Miranti, Sri Rejeki Rahayuningsih, Wahyu Safriansyah, Rizky Riscahya Pratama Syamsuri, Kindi Farabi, Dina Oktavia, Arshad Naji Alhasnawi e Febri Doni. "Red Mangrove (Rhizophora stylosa Griff.)—A Review of Its Botany, Phytochemistry, Pharmacological Activities, and Prospects". Plants 12, n. 11 (1 giugno 2023): 2196. http://dx.doi.org/10.3390/plants12112196.
Testo completoAbstract (sommario):
Mangroves are ecologically significant plants in marine habitats that inhabit the coastlines of many countries. Being a highly productive and diverse ecosystem, mangroves are rich in numerous classes of phytochemicals that are of great importance in the field of pharmaceutical industries. The red mangrove (Rhizophora stylosa Griff.) is a common member of the Rhizophoraceae family and the dominant species in the mangrove ecosystem of Indonesia. R. stylosa mangrove species are rich in alkaloids, flavonoids, phenolic acids, tannins, terpenoids, saponins, and steroids, and are widely used in traditional medicine for anti-inflammatory, antibacterial, antioxidant, and antipyretic effects. This review aims to provide a comprehensive understanding of the botanical description, phytochemical profiles, pharmacological activities, and medicinal potentials of R. stylosa.
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Putri, Audina, Dietriech Geoffrey Bengen, Neviaty Putri Zamani, Ummu Salma, Novian Prahandhy Kusuma, Nanda Tiara Diningsih e Sonja Kleinertz. "Mangrove Habitat Structure of Mud Crabs (Scylla serrata and S. olivacea) in the Bee Jay Bakau Resort Probolinggo, Indonesia". ILMU KELAUTAN: Indonesian Journal of Marine Sciences 27, n. 2 (8 marzo 2022): 124–32. http://dx.doi.org/10.14710/ik.ijms.27.2.124-132.
Testo completoAbstract (sommario):
Mud crabs (Scylla serrata and S. olivacea) are important fisheries resources, but their population in nature is decreasing due to anthropogenic activities, like the deforestation of mangrove forests. Hence, it is crucial to conserve this marine biota for future sustainable use and to conserve our marine biodiversity. Conducting studies on the biological interactions of mud crabs in mangrove habitats can be one of the future conservation approaches. Accordingly, an analysis of the functional relationships between Scylla spp. abundance and the respective mangrove habitat have to be carried out. The research was conducted in the mangrove ecosystem of Bee Jay Bakau Resort Probolinggo (BJBR). Data were collected using line transects and quadrant transects. The Associations between mangroves and mud crab habitat structures were analyzed using the Correspondence Analysis (CA) method. The results show that the relationship matrix between Scylla spp. and the structure of the mangrove habitat is centered on the F1 and F2 factorial axes (89.22%). S. serrata of all size classes were associated with dense mangroves (≥15 trees per 100m2) and high salinities (3-4 ppt), while S. olivacea has shown to be associated with rare to very dense mangrove systems. It indicates that S. olivacea tends to have a higher adaptation rate than S. serrata in this mangrove system. This study will provide information and recommendation for the conservation management of mud crabs and mangrove ecosystems to conserve marine biodiversity.
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Geetha, R., N. Chandramohanakumar e Lizen Mathews. "Seasonal Variability of Dissolved Nutrients in Mangrove Ecosystems along South West Coast of Kerala, India." Journal of Wetlands Ecology 3 (21 dicembre 2009): 32–42. http://dx.doi.org/10.3126/jowe.v3i0.2264.
Testo completoAbstract (sommario):
The mangroves of Kerala are fast disappearing due to developmental activities. There are very few studies conducted in the chemical aspects of these ecosystems. The main objective of this study is to assess the spatial and seasonal variation of hydrographical as well as nutrients in mangrove ecosystems along Kerala coast. Five sampling sites least intervened by industries were selected for the study. Sampling was done for a period of six months in monthly intervals. A monsoonal hike of dissolved nutrients was observed in all ecosystems except in the constructed mangrove wetland. The constructed wetland exhibited a different hydrography and nutrient level in all seasons. The mangrove forest in this area consists of the species Bruguiera gymnorrhiza which has been planted since forty years. Key words: wetlands; mangroves; nutrients; season; constructed wetland DOI: 10.3126/jowe.v3i0.2264 Journal of Wetlands Ecology, (2009) Vol. 3, pp 32-42
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I Ketut Ginantra, I Ketut Muksin e Martin Joni. "Mangrove flora as an ecotourism attraction in the Perancak Mangrove, Jembrana Bali". International Journal of Science and Research Archive 12, n. 2 (30 luglio 2024): 445–54. http://dx.doi.org/10.30574/ijsra.2024.12.2.1251.
Testo completoAbstract (sommario):
The coastal mangroves of Perancak Jembrana Village cover an area of around 177.09 hectares, some of the area (around 10 ha) has been developed into a tourist attraction. The tourism being developed is ecotourism based on ecology, biodiversity, conservation of natural resources, environmental education and economic empowerment of local communities. The aim of the research is to identify and describe the diversity of mangrove flora. Analysis of mangrove vegetation uses the square method, the parameters determined are the number of individuals of each species, the area of canopy cover for each species and the frequency of presence. Diversity was calculated with the Shanon-Wiener index. The research results showed that in the Perancak ecotourism area, 25 mangrove flora were found, consisting of 16 species of true mangrove flora and nine species of associated mangroves. The species that dominate are Rhizophora mucronata (important value 52.63), Rhizophora apiculata (important value 31.93), Avicennia marina (28.70), Rhizophora stylosa (important value 24.81), Avicennia officinalis (important value 17, 73) and Sonneratia alba (important value 16.39). The diversity index (H) is 2.89 and the species evenness index is 0.90. Species diversity in mengrove vegetation with a diversity index >1 and evenness approaching 1 means that the condition of the Perancak mangrove is in the stable/good category. Interpretation of the diversity of mangrove flora, habitus characteristics, fruit morphology, root types, typical substrate types is an interesting attraction for ecotourism activities.
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Rahim, S., D. W. K. Baderan, M. S. Hamidun, A. Hasim, W. E. S. Anwar, M. H. Angio, A. Faqih, M. R. Hariri e S. Sunardi. "Diversity, distribution and conservation status of mangrove species in Pulias Bay, Indonesia". Biosystems Diversity 31, n. 3 (15 luglio 2023): 276–81. http://dx.doi.org/10.15421/012331.
Testo completoAbstract (sommario):
As an ecosystem, the mangrove ecosystem serves various purposes. The objectives of this study are to (1) identify the community structure of the important value index; and (2) evaluate the importance of the mangrove species diversity index in Pulias Bay in Ogodeide District, Tolitoli Regency. The study was conducted in 2021 using a quantitative descriptive methodology and survey method. The number of discovered species will be used to establish the species composition. The structure of the mangrove communities is being evaluated by calculating the relative density (RD) and frequency (FR). The data is tabulated to calculate the Important Value Index (IVI) value according to the Shannon-Wiener formula. There were 18 different species of mangroves discovered, including Rhizophora apiculata, Rh. mucronata, Rh. stylosa, Bruguiera parviflora, B. gymnorrhiza, Ceriops tagal, C. decandra, Sonneratia alba, S. caseolaris, S. ovata, Avicennia lanata, Xylocarpus moluccensis, Acrostichum aureum, Nypa fruticans, and Pemphis acidula. The Rhizophoraceae family predominated at each observation station, according to the findings of the vegetation analysis. Meanwhile the most rarely found species of mangrove were Acrostichum aureum, Sonneratia casiolaris, and Xylocarpus moluccensis, each with two specimens. The community structure reveals that X. moluccensis has the lowest IVI value of 12.7%, while Rhizophora mucronata has an IVI value of 101.3%. The mangrove Diversity Index (H') has a value of 2.48 and meets the standards for moderate diversity. Physical and chemical parameter measurements often indicate that the four stations or sites where the data was collected have similar conditions. Interestingly, we also found Avicennia lanata, a mangrove species that falls under the Vulnerable category. The collected information can be used to manage the mangrove forest in Pulias Bay in the Ogodeide Sub-District of the Tolitoli Regency and serve as a database for efforts to conserve mangroves and mitigate the effects of global warming.
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Rahmawati, Azelia Dwi. "Vegetation-Water-Built Up Index Combined: Algorithm Indices Combination for Characterization and distribution of Mangrove Forest through Google Earth Engine". CELEBES Agricultural 3, n. 1 (31 agosto 2022): 20–42. http://dx.doi.org/10.52045/jca.v3i1.298.
Testo completoAbstract (sommario):
Mangroves that live in ecotone areas have a fairly significant role in the economy and ecology. This strategic role requires spatial data to facilitate the management and development of mangrove areas. The mangrove mapping process usually uses a manual method, namely through software, and has shortcomings and limitations in image management that require massive data storage. Cloud computing-based Google Earth Engine (GEE) mapping platform can manage images with an extensive scope and spatiotemporal data processing. However, this platform requires index formulas or combinations to help classify and increase accuracy in mapping the earth’s surface. The innovation with the combined VWB-IC (Vegetation-Water-Built-up Index Combined) formula is projected to classify the characteristics of mangrove areas in Jakarta Bay. The combination consists of three types of indices, namely vegetation index (NDVI, GNDVI, ARVI, EVI, SLAVI, and SAVI), water (NDWI, MNDWI, and LSWI), and buildings (IBI and NDBI). This combination is used to translate the classification of mangroves using the Random Forest (RF) machine learning algorithm method with the Sentinel-2 MSI (Multispectral Instrument) satellite image source and through the GEE platform. This platform generates raster data for land use classification (including mangroves), and then the analysis is continued using ArcMap software. The obtained mangrove area is 220.43 ha, located in Jakarta Bay and divided into the Angke Kapuk Nature Tourism Park and the Pantai Indah Kapuk Mangrove Ecotourism Area. The data from this research is expected to provide a recommendation for a combination index formula for mapping mangrove areas in urban areas. The spatial distribution area can be used as an evaluation material in mangrove areas in Jakarta Bay
33
Saenger, P. "Mangrove vegetation: an evolutionary perspective". Marine and Freshwater Research 49, n. 4 (1998): 277. http://dx.doi.org/10.1071/mf97139.
Testo completoAbstract (sommario):
The world-wide occurrence of mangrove vegetation and the modern floristic divergence between the Indo–Pacific and the Atlantic mangroves, can only be explained by historical processes, in that the composition of the modern mangrove flora at any one location, while subject to present-day climatic and geographical conditions, is largely relict. Although several interpretations have been offered to relate mangrove distributions to past events, none has been universally accepted. What is explored here, is that there are several historical and modern processes which in combination, have resulted in the present day distribution of mangroves. Evolutionary processes are reviewed from the fossil record and from the data on continental drift. Next, the ecological processes that are selectively acting on the various species and their distributions are examined with particular emphasis on aridity, temperature and latitudinal attentuation of species. Finally, some modern anthropogenic processes (e.g. species introductions, over-exploitation and habitat modification, afforestation) are examined in terms of their effects on mangrove distribution. As an outcome of these various processes, the modern mangrove vegetation is analysed particularly in relation to regions of endemism, vicariance among species, discontinuous distributions, hybridization and divergence. Finally, some speculation is offered in terms of future trends and evolutionary possibilities.
34
Lai, Jiayong, Wee Cheah, Kishneth Palaniveloo, Rempei Suwa e Sahadev Sharma. "A Systematic Review of the Physicochemical and Microbial Diversity of Well-Preserved, Restored, and Disturbed Mangrove Forests: What Is Known and What Is the Way Forward?" Forests 13, n. 12 (16 dicembre 2022): 2160. http://dx.doi.org/10.3390/f13122160.
Testo completoAbstract (sommario):
Mangrove forests are salt-tolerant intertidal vegetation in tropical and subtropical areas. Mangrove ecosystems provide commercial products, valuable fisheries, and aquaculture resources, protect and stabilize coastlines, and are important carbon sinks. However, they are threatened globally by human activities such as deforestation, pollution, and development causing fragmentation between the well-preserved, restored, and disturbed mangrove forests. Despite this, mangroves can adapt and strive well and are notable well associated with microbial diversity. Here, we investigate the diversity of microbes in different environmental settings using preferred reporting items for systematic and meta-analyses (PRISMA) analysis for publications from Scopus and the Web of Science databases. We report publications since 1987, and observed an exponential increase in publications beginning in the year 2000, which may be associated with the development of molecular and sequencing technologies. Differences in bacterial diversity was observed across the well-preserved, restored, and disturbed mangrove environments. Disturbed mangrove forests had a higher diversity (70 unique taxon orders reported) compared to well-preserved (33 unique taxon orders reported) and restored forests (38 unique taxon orders reported). Based on our analysis, we found that the microbial community plays an important role in the survival and adaptability of mangroves under varying environmental conditions. Thus, there is a need and a lot of potential for research in the area of mangrove microbiology with reference to ecology, biogeochemistry, and geomorphology.
35
Scarnecchia, David L., e Peter Saenger. "Mangrove Ecology, Silviculture and Conservation". Journal of Range Management 57, n. 4 (luglio 2004): 422. http://dx.doi.org/10.2307/4003869.
Testo completo
36
Singgalen, Y. "Vegetation Index and Mangrove Forest Utilization through Ecotourism Development in Dodola and Guraping of North Maluku Province". Jurnal Manajemen Hutan Tropika (Journal of Tropical Forest Management) 28, n. 2 (9 agosto 2022): 150–61. http://dx.doi.org/10.7226/jtfm.28.2.150.
Testo completoAbstract (sommario):
This study analyzes the vegetation index and mangrove forest utilization through ecotourism development in Guraping and Dodola Island of North Maluku Province. This research uses a remote sensing approach through Landsat 8 Operational Land Imagery (OLI) from 2013 and 2021, calculated based on the normalized difference vegetation index (NDVI) algorithms. This study indicates that ecotourism development can preserve the mangrove forest and generate economic and social benefits for the local community. Otherwise, the vegetation index in mangrove areas from 2013 to 2021 needs to be considered seriously as the primary data to optimize the management of tourism destinations. In the case of Dodola Island, the increased number of vegetation in 2017 experienced significant changes and threatened the sustainability of mangrove ecotourism. Thus, the mangrove monitoring needs to be optimized to anticipate the unsustainability of mangroves, which determines the sustainability of tourism in North Maluku Province. This study offers an idea to involve the local community in conserving the mangrove area through a controlled and sustainable rehabilitation program instead of economic activity purposes. The findings indicate that the existing condition of the Guraping mangrove forest in 2021 is classified as moderate compared with mangrove ecotourism in Dodola Island with sparse criteria based on the Decree of the Minister of State for the Environment in 2004. This research suggests adopting the community-based ecotourism mangrove development through collaborative advantages of all tourism stakeholders.
37
Nunes, Sérgio P. D. Q., Marlon C. França, Marcelo C. L. Cohen, Luiz C. R. Pessenda, Erika S. F. Rodrigues, Evandro A. S. Magalhães e Fernando A. B. Silva. "Assessment the Impacts of Sea-Level Changes on Mangroves of Ceará-Mirim Estuary, Northeastern Brazil, during the Holocene and Anthropocene". Plants 12, n. 8 (20 aprile 2023): 1721. http://dx.doi.org/10.3390/plants12081721.
Testo completoAbstract (sommario):
Predictions of the effects of modern Relative Sea-Level (RSL) rise on mangroves should be based on decadal-millennial mangrove dynamics and the particularities of each depositional environment under past RSL changes. This work identified inland and seaward mangrove migrations along the Ceará-Mirim estuary (Rio Grande do Norte, northeastern Brazil) during the mid–late Holocene and Anthropocene based on sedimentary features, palynological, and geochemical (δ13C, δ15N, C/N) data integrated with spatial-temporal analysis based on satellite images. The data indicated three phases for the mangrove development: (1°) mangrove expansion on tidal flats with estuarine organic matter between >4420 and ~2870 cal yrs BP, under the influence of the mid-Holocene sea-level highstand; (2°) mangrove contraction with an increased contribution of C3 terrestrial plants between ~2870 and ~84 cal yrs BP due to an RSL fall, and (3°) mangrove expansion onto the highest tidal flats since ~84 cal yr BP due to a relative sea-level rise. However, significant mangrove areas were converted to fish farming before 1984 CE. Spatial-temporal analysis also indicated a mangrove expansion since 1984 CE due to mangrove recolonization of shrimp farming areas previously deforested for pisciculture. This work mainly evidenced a trend of mangrove expansion due to RSL rise preceding the effects of anthropogenic emissions of CO2 in the atmosphere and the resilience of these forests in the face of anthropogenic interventions.
38
Ashton, Elizabeth C., Donald J. Macintosh e Peter J. Hogarth. "A baseline study of the diversity and community ecology of crab and molluscan macrofauna in the Sematan mangrove forest, Sarawak, Malaysia". Journal of Tropical Ecology 19, n. 2 (6 febbraio 2003): 127–42. http://dx.doi.org/10.1017/s0266467403003158.
Testo completoAbstract (sommario):
Baseline ecological studies of pristine mangroves are important for monitoring, management and conservation of mangrove ecosystems. Diversity, density, biomass and community structure of crab and molluscan macrofauna were studied in a near-pristine mangrove forest in Sematan, Sarawak. In each of the nine 100-m2 plots, six 15-min catching periods were used to collect crabs and three 1-m2 quadrats were sampled for molluscan epifauna. Environmental variables and vegetation were also recorded in each 100-m2 plot. Thirty-one crab species and 44 molluscan species were recorded, including a few species not previously reported from Sarawak. Crab community structure was correlated with topographical height and surface water pH and salinity. Gastropod community structure was correlated with redox potential of water at depth, topographical height, surface water pH and leaf litter. Crab community structure and species number were positively correlated with tree and seedling community structure and diversity, suggesting that the mangrove vegetation is important to the crab fauna as a habitat and food supply. Molluscan abundance was positively correlated with sapling diversity and negatively correlated with the numbers of mangrove associates and tree species. The young leaves on mangrove saplings may provide a better food source than those on mature trees or mangrove associates. The data from this study provide a valuable baseline for future use at this site and for comparison with more degraded mangrove habitats elsewhere in South-East Asia.
39
Bulmer, R. H., L. Schwendenmann e C. J. Lundquist. "Sediment CO<sub>2</sub> efflux from cleared and intact temperate mangroves and tidal flats". Biogeosciences Discussions 12, n. 4 (25 febbraio 2015): 3547–76. http://dx.doi.org/10.5194/bgd-12-3547-2015.
Testo completoAbstract (sommario):
Abstract. Temperate mangroves in Southern Australia and New Zealand have been increasing in area over the past 50 years, whereas tropical mangroves have declined by 30–50% over a similar time frame. Tropical mangroves are understood to be an important carbon sink and carbon dioxide (CO2) emissions following clearance are estimated to be comparable or greater than CO2 emissions following the clearance of many terrestrial forest systems. Recreational and amenity values or perceived loss of other estuarine habitats due to expanding temperate mangrove forests have resulted in clearing of temperate mangroves. In this study, we investigated the impact of temperate mangrove clearance on CO2 efflux from the sediment to the atmosphere along with a range of other biotic and abiotic factors. Significantly higher CO2 efflux rates were measured in cleared (1.34 ± 0.46 μmol m2 s-1) and intact mangrove sites (2.31 ± 0.72 μmol m2 s-1) than in tidal flats (-0.23 ± 0.27 μmol m2 s-1). Site and sediment characteristics such as sediment carbon and nitrogen concentration, chlorophyll α concentration, grain size, mangrove height, macrofaunal abundance, sediment temperature and moisture were strongly correlated with sediment CO2 efflux. Our results suggest that carbon stored within temperate mangrove sediment is released over a period of years to decades after mangrove clearance. CO2 efflux from intact and cleared temperate mangroves was found to be comparable to rates observed in the tropics. Disturbance of the surface biofilm resulted in elevated CO2 efflux across all habitats, suggesting the important role of surface biofilm communities in mediating CO2 efflux.
40
Rahman, MR, e M. Asaduzzaman. "Ecology of Sundarban, Bangladesh". Journal of Science Foundation 8, n. 1-2 (16 aprile 2013): 35–47. http://dx.doi.org/10.3329/jsf.v8i1-2.14618.
Testo completoAbstract (sommario):
Sundarban is the largest mangrove wetland in the world. It covers an area of about 1mha, of which 60% is located in Bangladesh and the remaining western portion, comprising 40%, lies in India. Mangrove ecosystems are of great ecological significance in the tropical and sub-tropical coast. They protect our coast from heavy wind, tidal waves, coastal erosion and sea water intrusion, generate substantial quantities of fishery resources and provide many useful forestry products. The Sundarban ecosystem supports rich fisheries diversity. This ecosystem support 27 families and 53 species of pelagic fish, 49 families 124 species of demersal fish, 5 families and 24 species of shrimps, 3 families and 7 species of crabs, 8 species of lobster. A total 334 plants, 165 algal, 13 special orchids, 17 fern, 87 monocotyledon and 230 dicotyledon belonging to 245 genera and 75 families from the sundarbans and adjacent area are found available. The principal tree species is Sundry (Heritiera fomes) which covers about 73% to total landmass and the second species is Gewa (Excoecaria agallocha) which covers about 16% of total forest area. The plant species include 35 legumes, 29 grasses, 19 sedges, and 18 euphorbias. Of the 50 true mangrove plant species recorded throughout the globe, the Sundarbans alone contain 35 species. The magnificent among the animals on land is Royal Bengal Tiger, Spotted deer, barking deer and wild boars are there in plenty. Besides those jungle cats, fishing cat, civet cat, monkey, bengal fox, jackle, water monitor, monitor lizard and snakes are important faunal spp. Moreover, abundant of the Sundarbans are purple heron, pond heron, cattle egret, little egret, open billed stork, smaller adjutant stork, brahmini kite, spotted dove, rose ringed parakeet, crow pheasant, wood pecker, bee eater, drongo, pide myna, jungle myna, bulbul, tailor bird, magpie robin, sparrow etc., Otherwise, recorded that wild Buffalo, 2 species of deer, javan rhinoceros extinct and presently 2 species of amphibians, 14 species of reptiles 25 species of birds and 5 species of mammals are considered as endangered species. This paper is to produce a new assessment of the mangroves ecology of Sundarbans. DOI: http://dx.doi.org/10.3329/jsf.v8i1-2.14618 J. Sci. Foundation, 8(1&2): 35-47, June-December 2010
41
Sweetman, A. K., J. J. Middelburg, A. M. Berle, A. F. Bernardino, C. Schander, A. W. J. Demopoulos e C. R. Smith. "Impacts of exotic mangrove forests and mangrove deforestation on carbon remineralization and ecosystem functioning in marine sediments". Biogeosciences Discussions 7, n. 2 (9 aprile 2010): 2631–71. http://dx.doi.org/10.5194/bgd-7-2631-2010.
Testo completoAbstract (sommario):
Abstract. To evaluate how mangrove invasion and removal can modify benthic carbon cycling processes and ecosystem functioning, we used stable-isotopically labelled algae as a deliberate tracer to quantify benthic respiration and C-flow through macrofauna and bacteria in sediments collected from (1) an invasive mangrove forest, (2) deforested mangrove sites 2 and 6 years after removal of above-sediment mangrove biomass, and (3) two mangrove-free, control sites in the Hawaiian coastal zone. Sediment oxygen consumption (SOC) rates were significantly greater in the mangrove and mangrove removal site experiments than in controls and were significantly correlated with total benthic (macrofauna and bacteria) biomass and sedimentary mangrove biomass (SMB). Bacteria dominated short-term C-processing of added microalgal-C and benthic biomass in sediments from the invasive mangrove forest habitat. In contrast, macrofauna were the most important agents in the short-term processing of microalgal-C in sediments from the mangrove removal and control sites. Mean faunal abundance and short term C-uptake rates in sediments from both removal sites were significantly higher than in control cores, which collectively suggest that community structure and short-term C-cycling dynamics in habitats where mangroves have been cleared can remain fundamentally different from un-invaded mudflat sediments for at least 6-yrs following above-sediment mangrove removal. In summary, invasion by mangroves can lead to large shifts in benthic ecosystem function, with sediment metabolism, benthic community structure and short-term C-remineralization dynamics being affected for years following invader removal.
42
Febriansyah, Satria Cahya, Luchman Hakim e Catur Retnaningdyah. "Evaluation of Mangrove Water Quality in Pancer Cengkrong, Trenggalek and Sine, Tulungagung, East Java, Indonesia Using Phytoplankton as Bioindicators". Jurnal Ilmiah Perikanan dan Kelautan 14, n. 2 (30 agosto 2022): 297–312. http://dx.doi.org/10.20473/jipk.v14i2.32459.
Testo completoAbstract (sommario):
Highlight Research Anthropogenic factors are the main cause of damage to mangrove ecosystems Restoration is a method for ecosystem restoration Restoration success is seen from the physical, chemical, and biological parameters Phytoplankton is a bioindicator of water quality The abundance of mangroves can explain the state of an ecosystem Abstract Mangrove ecosystems in Sine and Pancer Cengkrong had degraded due to land-use change and restoration has been carried out over a few year on the damaged location. This study was conducted to evaluate water quality of mangrove ecosystems at both locations based on physical, chemical and phytoplankton parameters as bioindicators. The evaluation of Cengkrong Mangrove was carried out at 4 different locations based on different periode of restoration, namely restoration of 2008-2009, 2013-2014, natural mangroves, and 2005 succession mangroves, whereas there was only one sampling site at Sine mangrove namely 1998-2008 restoration. The physico-chemical parameters measured include water temperature, air temperature, conductivity, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), salinity, nitrate, and orthophosphate. Phytoplankton data was used to measure, trophic diatom index (TDI) as an indicator of water nutrition status, and pollution tolerant value (%PTV) as an indicator of organic pollution. The results showed that the water quality at all the study locations met the Indonesian Ministry of Environment Regulation No 51/2004, except nitrate and phosphate. Based on the TDI index, mangrove in Sine, Cengkrong 2013-2014 restoration, and 2005 succession mangroves were categorized as hyper-eutrophic, natural Cengkrong mangroves were categorized as eutrophic, and 2008-2009 restored Cengkrong mangroves were categorized as meso-eutrophic. Based on the %PTV index, in the Sine mangrove, 2013-2014 Cengkrong restoration, and 2005 succession mangroves were classified as high levels of organic matter pollution, while in the Cengkrong 2008-2009 restoration and natural Cengkrong were classified as a moderate level of organic pollution.
43
Sweetman, A. K., J. J. Middelburg, A. M. Berle, A. F. Bernardino, C. Schander, A. W. J. Demopoulos e C. R. Smith. "Impacts of exotic mangrove forests and mangrove deforestation on carbon remineralization and ecosystem functioning in marine sediments". Biogeosciences 7, n. 7 (8 luglio 2010): 2129–45. http://dx.doi.org/10.5194/bg-7-2129-2010.
Testo completoAbstract (sommario):
Abstract. To evaluate how mangrove invasion and removal can modify short-term benthic carbon cycling and ecosystem functioning, we used stable-isotopically labeled algae as a deliberate tracer to quantify benthic respiration and C-flow over 48 h through macrofauna and bacteria in sediments collected from (1) an invasive mangrove forest, (2) deforested mangrove sites 2 and 6 years after removal of above-sediment mangrove biomass, and (3) two mangrove-free control sites in the Hawaiian coastal zone. Sediment oxygen consumption (SOC) rates averaged over each 48 h investigation were significantly greater in the mangrove and mangrove removal site experiments than in controls and were significantly correlated with total benthic (macrofauna and bacteria) biomass and sedimentary mangrove biomass (SMB). Bacteria dominated short-term C-processing of added microalgal-C and benthic biomass in sediments from the invasive mangrove forest habitat and in the 6-yr removal site. In contrast, macrofauna were the most important agents in the short-term processing of microalgal-C in sediments from the 2-yr mangrove removal site and control sites. However, mean faunal abundance and C-uptake rates in sediments from both removal sites were significantly higher than in control cores, which collectively suggest that community structure and short-term C-cycling dynamics of sediments in habitats where mangroves have been cleared can remain fundamentally different from un-invaded mudflat sediments for at least 6-yrs following above-sediment mangrove removal. In summary, invasion by mangroves can lead to dramatic shifts in benthic ecosystem function, with sediment metabolism, benthic community structure and short-term C-remineralization dynamics being affected for years following invader removal.
44
Vaughn, Sarah E. "Disappearing Mangroves: The Epistemic Politics of Climate Adaptation in Guyana". Cultural Anthropology 32, n. 2 (12 maggio 2017): 242–68. http://dx.doi.org/10.14506/ca32.2.07.
Testo completoAbstract (sommario):
This article details the epistemic politics that shape the climate adaptation of sea defense in Guyana. Rethinking the material arrangements of expertise in the Anthropocene, I track the work of a group of technoscientific experts participating in the Guyana Mangrove Restoration Project (GMRP). In an attempt to redesign sea defense around mangrove ecosystems, GMRP participants recognize that climate adaptation is not solely dependent on their well-intentioned efforts. As research objects, mangroves are not only forms of evidence but also tools that guide expert action and distinctions in day-to-day labor. Moreover, mangroves draw out the explicit contingencies of modeling, placing expert groups in tension with one another as each seeks to advance their own ideas for mangrove protection, management, or change. I show that this relational ontology is emblematic of climate-adaptation policy’s broader operative logics, or what I call inverse performativity. This is a process whereby an unruly world forces one expert group to seek help from others, building a new ecology of expertise to adapt to a changing climate. Impermanent and wondrous, mangroves urge us to think more creatively about vulnerability to climate change and the kinds of practices that inspire knowledge about it.
45
Suyarso e Praditya Avianto. "AMMI Automatic Mangrove Map and Index: Novelty for Efficiently Monitoring Mangrove Changes with the Case Study in Musi Delta, South Sumatra, Indonesia". International Journal of Forestry Research 2022 (8 dicembre 2022): 1–14. http://dx.doi.org/10.1155/2022/8103242.
Testo completoAbstract (sommario):
Mapping mangroves using satellite imagery has been done for decades. It helps reduce obstacles in inaccessible places caused by the mangroves’ intricate root system, thick mud, and loss of position signals. There is an urgent need to produce a mangrove map that automatically and accurately covers the mangroves with the density index of the canopy as visually represented in satellite imagery. The research was conducted through an analytical desk study of the mangrove features from space. The study aims to develop a simple formula for automatically tracing, capturing, and mapping mangroves and determining the canopy density index from open access of satellite data to eliminate manual digitization work, make it easy to use, and save cost and time. The goal is to monitor, assess, and manage the condition of mangroves for anyone interested in mangroves, including the central government, local authorities, and local communities. As a result, the authors proposed an algorithm: (ρNIR − ρRed)/(ρRed + ρSWIR1) ∗ (ρNIR − ρSWIR1)/(ρSWIR1 − 0.65 ∗ ρRed). Experimental results in many mangrove forests using Landsat 5 TM, Landsat 7 ETM, Landsat 8 OLI, and Sentinel 2 imageries show satisfactory performance. The maps capture the spatial extent of the mangroves automatically and match the satellite imagery visually. The index correlates significantly with the Normalized Difference Water Index (NDWI), with R2 reaching 0.99. The research will apply the formula of the Musi Delta mangrove complex in South Sumatra, Indonesia. The advantage of the algorithm is that it works well, is easy to use, produces mangrove maps faster, informs the index, and efficiently monitors the change in mangrove conditions from time to time.
46
Acosta, Charles A., e Mark J. Butler IV. "Role of mangrove habitat as a nursery for juvenile spiny lobster, Panulirus argus, in Belize". Marine and Freshwater Research 48, n. 8 (1997): 721. http://dx.doi.org/10.1071/mf96105.
Testo completoAbstract (sommario):
The use of mangrove prop roots and associated coralline habitats by Caribbean spiny lobsters was investigated near two types of mangrove islands in Belize. Spiny lobsters sheltered among mangrove prop roots, in undercut peat banks and under corals near islands, and they ranged in size from newly recruited juveniles to subadults. Lobsters preferred to shelter under large stony corals, but their use of mangrove prop roots nd undercut peat banks increased when the density of corals was low. Den residence time and distance moved within a site were similar at islands isolated by deep water channels and islands separated by shallow seagrass beds, but as a consequence of high immigration rates, population sizes were highest near shallow islands. Predation on newly settled juveniles was greater in seagrass and coral crevices than in mangrove prop roots, whereas the survival of larger juveniles was higher in mangroves and coral patch reefs than in seagrass. These results suggest that mangrove habitats may function as a nursery for juvenile spiny lobsters but that the use of this habitat depends on shelter characteristics and the isolation of islands.
47
Griffiths, Lauren N., Elix Hernandez, Elvira Cuevas e William J. Mitsch. "Above- and Below-Ground Carbon Storage of Hydrologically Altered Mangrove Wetlands in Puerto Rico after a Hurricane". Plants 10, n. 9 (20 settembre 2021): 1965. http://dx.doi.org/10.3390/plants10091965.
Testo completoAbstract (sommario):
Mangrove wetlands are important ecosystems, yet human development coupled with climate change threatens mangroves and their large carbon stores. This study seeks to understand the soil carbon dynamics in hydrologically altered mangrove swamps by studying aboveground biomass estimates and belowground soil carbon concentrations in mangrove swamps with high, medium, and low levels of disturbance in Cataño, Jobos Bay, and Vieques, Puerto Rico. All three sites were affected by hurricane María in 2017, one year prior to the study. As a result of being hit by the Saffir-Simpson category 4 hurricane, the low-disturbance site had almost no living mangroves left during sampling. There was no correlation between level of hydrologic alteration and carbon storage, rather different patterns emerged for each of the three sites. At the highly disturbed location, belowground carbon mass averaged 0.048 ± 0.001 g-C cm−3 which increased with increased aboveground biomass. At the moderately disturbed location, belowground carbon mass averaged 0.047 ± 0.003 g-C cm−3 and corresponded to distance from open water. At the low-disturbed location, organic carbon was consistent between all sites and inorganic carbon concentrations controlled total carbon mass which averaged 0.048 ± 0.002 g-C cm−3. These results suggest that mangroves are adaptive and resilient and have the potential to retain their carbon storage capacities despite hydrologic alterations, but mass carbon storage within mangrove forests can be spatially variable in hydrologically altered conditions.
48
Hasan, Muhamad, Dolly Priatna e Yossa Istiadi. "The role of the parties in mangrove ecosystem recovery in Juntinyuat Coast, West Java, Indonesia". Indonesian Journal of Applied Environmental Studies 3, n. 2 (31 ottobre 2022): 111–19. http://dx.doi.org/10.33751/injast.v3i2.5120.
Testo completoAbstract (sommario):
Coastal abrasion is a problem that needs to be addressed thoroughly. If not properly managed, coastal abrasion can lead to other environmental issues, such as damage to mangroves and coastal ecosystems. The local government is actively carrying out mangrove ecosystem restoration program to conserve the coastal ecology by involving related agencies, industries, and the community surrounding the Juntinyuat coastal area. The focus of this research is to find out the planning, implementation, and monitoring carried out in relation to the restoration of the mangrove ecosystem based on the involvement of the parties in overcoming coastal abrasion on the coast of Juntinyuat, Indramayu Regency, West Java. Data were collected by conducting observations, interviews, and documentation to the community and the parties involved in restoring the mangrove ecosystem on the Juntinyuat coast. The results showed that mangrove ecosystem damage in the coastal area of Juntinyuat generates a high level of abrasion. The damage caused by abrasion threatens settlements, ponds, and agricultural land, as well as threatens the gas and oil pipelines of Pertamina Gas in the West Java operation area (Pertagas OWJA). There is a relationship between the critical condition of the mangrove ecosystem in the Juntinyuat coastal area and the initiation of efforts to restore the mangrove ecosystem. The initiation of mangrove ecosystem restoration arose from the critical condition of mangroves, which necessitates careful planning to restore damaged mangrove conditions. Related parties concerned with the preservation of the mangrove ecosystem subsequently coordinate to plan the mangrove ecosystem restoration program on the Juntinyuat coast. The mangrove ecosystem restoration was conducted after an initial survey in mid-2014. The role of the parties in planning, implementing, and monitoring the restoration of the mangrove ecosystem is running well and maximally with a clear division of duties and responsibilities. Currently, the results of the restoration of the mangrove ecosystem on the Juntinyuat coast can be felt together with the denser mangrove cover, reducing the abrasion impact, and making it a mangrove ecotourism area. In the future, it is necessary to form a coordinating team for the strategy of mangrove ecosystem management at the regency and sub-district levels to synergize policies and programs for managing mangrove ecosystems. Empowerment activities need to be carried out intensively to encourage a change in the role of mangrove management.
49
Amarasinghe, Mala. "Evolution of trends in Sri Lankan mangrove research and future prospects". Sri Lanka Journal of Aquatic Sciences 29, n. 1 (15 marzo 2024): 1–11. http://dx.doi.org/10.4038/sljas.v29i1.7611.
Testo completoAbstract (sommario):
The trend of sporadic surveys and qualitative descriptions of Sri Lankan mangrove flora in the first half of the 20th century has gradually changed to include quantitative studies on floristics, nevertheless, studies on quantification of fauna associated closely with mangrove ecosystems are scarce. Microbial diversity, especially in soil, and its ‘contribution to the detritus cycle are the least studied. The tendency to engage in short-term research at convenient sites affects the quality and relevance of research output with some redundancy, resulting in a marginal contribution to the knowledge base on mangrove ecology. Studying mangrove ecosystem functions/ services demands long-term collection of data that would have made them less attractive research ventures. Research on trophic relationships, detritus and nutrient cycling, habitat and pollination functions too have had the same fate. The Indian Ocean tsunami in 2004 triggered a considerable interest in the coastal protection function of mangroves, as it was evident that mangroves and other coastal vegetation provided superior resistance to tsunami waves than hard engineering coastal protective structures. This has led to an unprecedented trend of mangrove afforestation for coastal defense, more than to research on planting techniques and maintenance to enhance the survival and growth of seedlings. This is still an under-researched aspect. Escalating recognition of blue carbon as a climate-smart solution and the development of market mechanisms for blue carbon trading have induced a considerable research interest in quantifying the mangrove blue carbon stocks, especially in the soil. Research on atmospheric carbon removal capacity/rates of mangrove plants/forests through photosynthesis however, lags behind for the reason that it requires data collection for a longer period that demands greater financial and labour investment. The urgency created by the current climate change crisis for effective solutions to reduce atmospheric greenhouse gases may provide a conducive environment for mangrove research.
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Dias, Armando Cavalcante Franco, Michele de Cassia Pereira e Silva, Simone Raposo Cotta, Francisco Dini-Andreote, Fábio Lino Soares, Joana Falcão Salles, João Lúcio Azevedo, Jan Dirk van Elsas e Fernando Dini Andreote. "Abundance and Genetic Diversity ofnifHGene Sequences in Anthropogenically Affected Brazilian Mangrove Sediments". Applied and Environmental Microbiology 78, n. 22 (31 agosto 2012): 7960–67. http://dx.doi.org/10.1128/aem.02273-12.
Testo completoAbstract (sommario):
ABSTRACTAlthough mangroves represent ecosystems of global importance, the genetic diversity and abundance of functional genes that are key to their functioning scarcely have been explored. Here, we present a survey based on thenifHgene across transects of sediments of two mangrove systems located along the coast line of São Paulo state (Brazil) which differed by degree of disturbance, i.e., an oil-spill-affected and an unaffected mangrove. The diazotrophic communities were assessed by denaturing gradient gel electrophoresis (DGGE), quantitative PCR (qPCR), and clone libraries. ThenifHgene abundance was similar across the two mangrove sediment systems, as evidenced by qPCR. However, thenifH-based PCR-DGGE profiles revealed clear differences between the mangroves. Moreover, shifts in thenifHgene diversities were noted along the land-sea transect within the previously oiled mangrove. ThenifHgene diversity depicted the presence of nitrogen-fixing bacteria affiliated with a wide range of taxa, encompassing members of theAlphaproteobacteria,Betaproteobacteria,Gammaproteobacteria,Firmicutes, and also a group of anaerobic sulfate-reducing bacteria. We also detected a unique mangrove-specific cluster of sequences denoted Mgv-nifH. Our results indicate that nitrogen-fixing bacterial guilds can be partially endemic to mangroves, and these communities are modulated by oil contamination, which has important implications for conservation strategies.