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Littérature scientifique sur le sujet « Algal overgrowth »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Algal overgrowth"

Kim, Gwang Soo, Yeonghwa Gwon, Eun Ji Oh, Dongsu Kim, Jae Hyun Kwon, and Young Do Kim. "Classification Technique of Algae Using Hyperspectral Images of Algae Culture Media." Applied Sciences 13, no. 7 (2023): 4631. http://dx.doi.org/10.3390/app13074631.

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Increases in algal growth have been reported in rivers, reservoirs, and other water resources worldwide, including Korea. Algal overgrowth can result in algal bloom, which has several negative impacts, such as ecosystem degradation and economic losses. Mitigation measures employed in Korea include an algal warning system and survey-based water quality forecast systems. However, these methods are time-consuming and require sample collection from the site. On the other hand, remote sensing techniques that use chlorophyll a are unable to distinguish between different types of algal species. In th

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Claar, D. C., and M. Takabayashi. "The effects of growth anomaly on susceptibility of Montipora capitata to turf algal overgrowth." Marine and Freshwater Research 67, no. 5 (2016): 666. http://dx.doi.org/10.1071/mf14200.

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One of the most prominent coral diseases in Hawai‘i is growth anomaly (GA) of the skeleton. GA reduces key biological functions of Montipora capitata, but the effect of this disease on the ecological competitiveness of the coral has not been investigated. This study evaluated the effect of the GA on the susceptibility of an endemic Hawaiian coral M. capitata to algal overgrowth at Wai‘ōpae, Hawai‘i. Field surveys and photo analyses were conducted to collect epizootiological data. A relationship was found between GA severity and turf algal growth at the colony level; however, this relationship

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Eich, Andreas, Amanda K. Ford, Maggy M. Nugues, Ryan S. McAndrews, Christian Wild, and Sebastian C. A. Ferse. "Positive association between epiphytes and competitiveness of the brown algal genus Lobophora against corals." PeerJ 7 (February 8, 2019): e6380. http://dx.doi.org/10.7717/peerj.6380.

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Observations of coral–algal competition can provide valuable information about the state of coral reef ecosystems. Here, we report contact rates and apparent competition states for six shallow lagoonal reefs in Fiji. A total of 81.4% of examined coral perimeters were found to be in contact with algae, with turf algae (54.7%) and macroalgae of the genus Lobophora (16.8%) representing the most frequently observed contacts. Turf algae competitiveness was low, with 21.8% of coral–turf contacts being won by the algae (i.e. overgrowth or bleaching of coral tissue). In contrast, Lobophora competitive

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Coll, J. C., I. R. Price, G. M. K�nig, and B. F. Bowden. "Algal overgrowth of alcyonacean soft corals." Marine Biology 96, no. 1 (1987): 129–35. http://dx.doi.org/10.1007/bf00394846.

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Lu, Chunrong, Qi Zhang, Qinyu Huang, et al. "Significant Shifts in Microbial Communities Associated with Scleractinian Corals in Response to Algae Overgrowth." Microorganisms 10, no. 11 (2022): 2196. http://dx.doi.org/10.3390/microorganisms10112196.

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Microbes play a key role in reef dynamics, mediating the competition between scleractinian corals and benthic algae; however, major shifts in bacterial communities among coral species in response to increases in the abundance of algae are not well understood. We investigated the taxonomic composition of coral-associated microbial communities under algae-overgrowth conditions using 16S rRNA gene sequencing. The results showed that non-algal (i.e., healthy) tissue (HH) had lower bacterial abundance and diversity than tissue collected from the coral–algae interface boundary (HA) and areas of alga

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Jorissen, Hendrikje, Christina Skinner, Ronald Osinga, Dirk de Beer, and Maggy M. Nugues. "Evidence for water-mediated mechanisms in coral–algal interactions." Proceedings of the Royal Society B: Biological Sciences 283, no. 1836 (2016): 20161137. http://dx.doi.org/10.1098/rspb.2016.1137.

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Although many coral reefs have shifted from coral-to-algal dominance, the consequence of such a transition for coral–algal interactions and their underlying mechanisms remain poorly understood. At the microscale, it is unclear how diffusive boundary layers (DBLs) and surface oxygen concentrations at the coral–algal interface vary with algal competitors and competitiveness. Using field observations and microsensor measurements in a flow chamber, we show that coral (massive Porites ) interfaces with thick turf algae, macroalgae, and cyanobacteria, which are successful competitors against coral i

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Picken, Gordon B. "Moray Firth marine fouling communities." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 91 (1986): 213–20. http://dx.doi.org/10.1017/s0269727000009313.

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SynopsisFouling communities typical of shallow water inshore sites were found at three locations in the Moray Firth. At each, an initial background cover of solitary tubeworms and barnacles was overgrown by secondary fouling organisms. On the piles of Nigg jetty, overgrowth consisted of mussels in the depth range 0–6 m and hydroids, sponges, soft corals and anemones from 6–26 m. Buoys in the approaches to Cromarty Firth were completely covered by a mixture of algae and mussels. Sunlit areas of the float cleaned annually bore a diverse algal cover, whereas uncleaned shaded areas and the freely

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Bahri, Syamsul, Pranu Arisanto, Suhardi Suhardi, and Wildan Herwindo. "Pengembangan Awal Alat Pemanen Alga Sistem Rotating Filtered-Drum Untuk Perbaikan Kualitas Air di Perairan Tergenang." Jurnal Inovasi Konstruksi 2, no. 2 (2023): 88–94. http://dx.doi.org/10.56911/jik.v2i2.76.

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The phenomenon of overgrowth of green algae and cyanobacteria indicates a serious aquatic environmental problem from eutrophication. In aquatic ecosystems, algae are an integral part of the ecological system. But when there is abundant algae growth in the waters it causes the phenomenon of harmful alga blooms. Algae that were previously invisible, due to clumping, this group becomes invisible to the eye. The follow-up impact of the algae blooms is fish death, due to lack of oxygen at night. Algal masses that are swept by the wind onto the shores of bays and reservoir shores cause buildup and d

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Buriyo1, Amelia S., Nyatwere D. Mganga, and Mary Melchiory. "The Effects of Algal Blooms on Oxygen Levels in Lakes Babati and Eyasi, Tanzania." Tanzania Journal of Science 50, no. 1 (2024): 36–47. http://dx.doi.org/10.4314/tjs.v50i1.3.

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Globally aquatic ecosystems are reportedly overwhelmed by algal blooms due to excessive deposition of nutrients which ultimately cause hypoxia, leading to massive fish death. This study aimed at assessing the relationship between algae contents and dissolved oxygen (DO) in Lake Babati which is threatened by anthropogenic activities, whereas Lake Eyasi was used as a control. Algae contents (chlorophyll a), DO and surface water temperature were measured using standard methods. Results revealed that the mean algae content was significantly higher (4.47±0.88 mg/L) in Lake Babati than in Lake Eyasi

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Zhao, Qianming, Ruitong Jiang, Yuxin Shi, Anglu Shen, Peimin He, and Liu Shao. "Allelopathic Inhibition and Mechanism of Quercetin on Microcystis aeruginosa." Plants 12, no. 9 (2023): 1808. http://dx.doi.org/10.3390/plants12091808.

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The utilization of allelochemicals to inhibit algal overgrowth is a promising approach for controlling harmful algal blooms (HABs). Quercetin has been found to have an allelopathic effect on algae. However, its responsive mechanism needs to be better understood. In the present study, the inhibitory effects of different quercetin concentrations on M. aeruginosa were evaluated, and the inhibition mechanisms were explored. The results demonstrated that quercetin significantly inhibited M. aeruginosa growth, and the inhibitory effect was concentration-dependent. The inhibition rate of 40 mg L−1 qu

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Thèses sur le sujet "Algal overgrowth"

SEVESO, DAVIDE. "Assessing the expression of HsP60 in scleractinian corals subjected to biotic and abiotic stresses." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/41879.

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The reef health worldwide is seriously threatened by a multitude of factors such as abnormally elevated and low ocean temperatures, high UV radiations, changes in salinity, pollution and increasing incidence of diseases. Under adverse circumstances the equilibrium between the partners of the coral holobiont may be compromised and can lead to coral bleaching events. Bleaching refers to the loss in the coloration of the coral colony induced by the dissociation of the symbiosis between corals and their symbiotic algae. The extreme or unexpected environmental fluctuations could be very stressful f

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Li, Zhi. "MOCVD growth and characterization of high quality semi-polar (11-22) AlGaN obtained with overgrowth technique." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/20615/.

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Epitaxial growth of semi-polar (11-22) AlGaN layers with different Al composition has been performed by using the metal organic chemical vapour deposition (MOCVD) technique. A two-step overgrowth technique has been developed to both improve the crystal quality and address the cracking issue simultaneously for the AlGaN growth. Comprehensive studies on the structural and optical properties of the AlGaN overgrowth layers have been performed. Semi-polar (11-22) AlGaN layers with various Al compositions have been obtained with two different approaches. The first one is the standard AlGaN growth on

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Eager, Rosemary. "Documenting the association between a non-geniculate coralline red alga and its molluscan host." Thesis, University of the Western Cape, 2010. http://hdl.handle.net/11394/2380.

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Magister Scientiae (Biodiversity and Conservation Biology)<br>To further investigate the strength of the association and the relative advantages of the association to both organisms, several manipulation experiments were set up. A cage experiment set up in the shallow subtidal zone showed that the coralline survived equally well without the winkle and did therefore not require the winkle or its empty shell for survival. A second controlled laboratory aquarium experiment was designed under both fluorescent (rich in blue light) and incandescent light (rich in red light) to ascertain whether the

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Eager, Rosemary. "Documenting the association between a non-geniculate coralline red alga and its molluscan hos." Thesis, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3459_1297846107.

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<p>To further investigate the strength of the association and the relative advantages of the association to both organisms, several manipulation experiments were set up. A cage experiment set up in the shallow subtidal zone showed that the coralline survived equally well without the winkle and did therefore not require the winkle or its empty shell for survival. A second controlled laboratory aquarium experiment was designed under both fluorescent (rich in blue light) and incandescent light (rich in red light) to ascertain whether the coralline had a preference for O. sinensis over the similar

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Chapitres de livres sur le sujet "Algal overgrowth"

Davis, Andrew R., Nancy M. Targett, Oliver J. McConnell, and Craig M. Young. "Epibiosis of Marine Algae and Benthic Invertebrates: Natural Products Chemistry and Other Mechanisms Inhibiting Settlement and Overgrowth." In Bioorganic Marine Chemistry. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74560-7_4.

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Price, Trevor. "Harvesting in the Ocean." In Ecology of a Changed World. Oxford University PressNew York, 2022. http://dx.doi.org/10.1093/oso/9780197564172.003.0021.

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Abstract The ocean has been exploited for a much shorter duration than land, making it possible to assess current stocks against historical baselines, inferred by modeling catches over the past 400 years. Present numbers range from 33% (whales) to less than 5% (turtles) of their historical maxima. Whales have recently increased as a result of the 1982 moratorium on whaling, but many are still considered endangered. Although official records suggest that fish catch has plateaued since 1990, a thorough assessment indicates that catch likely reached a maximum in the early 1990s and has been decli

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Actes de conférences sur le sujet "Algal overgrowth"

Hofmann, Lars, Dirk Rudloff, Ingrid Rechenberg, and Jurgen Christen. "(AlGa)As Composition Profile Analysis of Trenches Overgrown with MOVPE." In 1999 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 1999. http://dx.doi.org/10.7567/ssdm.1999.d-14-3.

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Chen, Guan-Ting, Chia-Hua Chan, Chia-Hung Hou, et al. "Epitaxial lateral overgrowth of GaN on AlGaN/(111)Si micropillar array fabricated by polystyrene microsphere lithography." In Integrated Optoelectronic Devices 2008, edited by Hadis Morkoç, Cole W. Litton, Jen-Inn Chyi, Yasushi Nanishi, and Euijoon Yoon. SPIE, 2008. http://dx.doi.org/10.1117/12.764475.

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