Articles de revues : « Waterbird guild »

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Chakraborty, Anupam, Himangshu Barman, Goutam K. Saha et Gautam Aditya. « Wintering waterbird assemblage in an emerging wetland of West Bengal, India : characterization for conservation management ». Ornis Hungarica 29, n^o 1 (1 juin 2021) : 1–19. http://dx.doi.org/10.2478/orhu-2021-0001.

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Abstract Waterbirds constitute a prominent biota and reflect the ecosystem health and functionality of the freshwater wetlands. Documentation of the bird species assemblages of wetlands is therefore carried out as a part of monitoring of wetlands from a sustainability viewpoint. Using the emerging wetland of Purbasthali, West Bengal, India, as a model study area, the diversity of the associated bird species was estimated to supplement necessary information for conservation management of birds and ecosystems. The point count method was applied to count the waterbirds from each sighting location with a 25 m radius covering 360° arc and the counting period lasted 10 min for each site, and counts were made in the winter of 2016/2017. The data on the waterbirds encountered were recorded and subjected to diversity analysis, including the residential status, global population trend and feeding guilds. Apparently, the wetland was considered as suitable habitat for 27 waterbird species, which could be grouped under 24 genera, 10 families and 5 orders. Among these, the family Anatidae with maximum relative density and abundance dominated in the wetland. Out of the 27 recorded species, 5 species were widespread winter visitors, 3 species widespread resident, as well as, widespread winter visitors and 2 species were sparse local winter visitors. A globally near threatened species, the Black-headed Ibis (Threskiornis melanocephalus) was very common in the sampling sites. The waterbird assemblage in the wetland was dominated by carnivores followed by omnivores and herbivores. The abundance of the waterbirds with considerable variations in the foraging guild reflects availability and exploitation of multiple resources of the Purbasthali wetlands. Prominence in the differences in relative abundance of the different waterbirds could be linked with the heterogeneity in the habitat quality. The present information on waterbird assemblage calls for appropriate measures for conservation of the species and appropriate management of Purbasthali wetlands.

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Kopij, Grzegorz, et Mark Paxton. « Waterbirds in the panhandle of the Okavango Delta : dry season counts over two seven-year periods ». Zoology and Ecology 29, n^o 1 (13 juillet 2019) : 15–27. http://dx.doi.org/10.35513/21658005.2019.1.3.

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We counted waterbirds along a fixed route in the panhandle of the Okavango River in Mahango Game Reserve in the dry season during two seven-year periods (1991–1997 and 2000–2006). Palearctic migrants represented by 11 species in 1991–1997 and nine species in 2000–2006 together composed only a small percentage of all birds recorded in both periods. The two most numerous foraging guilds were birds foraging in shallow water and those foraging in deep water. The former guild was more numerous in 2000–2006, while the latter guild was more numerous in 1991–1997. The proportion of other foraging guilds varied little between the two periods. The most numerous diet guild was piscivores, they were more numerous in 1991–1997 than in 2000–2006. If the total numbers of birds of each particular species in the years 1991–1997 were pooled and compared with those for the years 2000–2006, then highly significant changes in their numbers between these periods could be seen for 53 out of 93 waterbird species. Over the timespan 1991–2006, 12 species significantly increased in numbers while one species, the Cattle Egret, declined; seven other species showed no significant changes in abundance. The increase can be linked to the volume of water flowing through the river. While during the years 1991–1997 the total volume measured at Mohembo was 45.9 km3 (SD = 1.43), during the years 2000–2006 the volume was 60.9 km3 (SD = 1.41). Diversity was very similar during the two periods (1991–1997: S = 1.4; 2000–2006: S = 1.3), with no difference in evenness. The striking feature is that species diversity and abundance of birds was far greater than any records from other southern African rivers to date.

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Tallei, Ever, Analía Benavidez, Alejandro Schaaf, Pablo Isola et Marcelo Zanotti. « Seasonal dynamics of waterbirds from a relict wetland in the central Monte Desert, Argentina ». Neotropical Biology and Conservation 16, n^o 2 (20 mai 2021) : 333–49. http://dx.doi.org/10.3897/neotropical.16.e61672.

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Wetlands currently have high rates of degradation, with more than 70% lost globally. In the central Monte Desert, Argentina, they are a scarce and limited resource for the biodiversity which depends on them. Waterbirds have been used as biological indicators of wetlands because they respond to fluctuations in food resources and to environmental changes in the short term. Here we analyse the seasonal variations in the structure of the waterbird assemblage from a relict wetland in this region. We carried out censuses of waterbirds in a 6-year period (between 2009 and 2019) during the southern summer and winter. We recorded 1875 individuals of 33 species of waterbirds during the summer and 677 individuals of 29 species during the winter. The grouping patterns of the waterbird assemblages differed between seasons (R = 0.35; p < 0.01). Taxonomic diversity profiles showed greater diversity for all indexes (qD) during the summer. The guild of invertivorous and omnivorous waders had a greater abundance of individuals during the summer (p < 0.05) and, together with the surface-feeding herbivores, contributed to the 87% of the dissimilarity of the assemblages between seasons. Phoenicopterus chilensis was the only species registered as threatened with national and international extinction. Relict wetlands, such as Laguna del Viborón, still have attributes of community diversity and represent the last refuges for waterbirds of the central Monte Desert. The information gathered in this study will contribute to the guidelines for integrated management plans and monitoring programmes for the conservation of the wetland and its biodiversity.

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Elafri, Ali, Mouhamed Belhamra et Moussa Houhamdi. « Comparing habitat preferences of a set of waterbird species wintering in coastal wetlands of North Africa : implication for management ». Ekológia (Bratislava) 36, n^o 2 (27 juin 2017) : 158–71. http://dx.doi.org/10.1515/eko-2017-0014.

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Abstract Every year, the Coastal wetlands of North Africa support an important wintering waterbird population of many Palearctic and sub-Saharan species of various contrasting habitat requirements. In this study, we describe the habitat use by24 water-obligate species wintering in a coastal wetland of the Northeastern Algeria (the wetland of Lake Tonga), highlighting thereby the ecological mechanisms that support their coexistence and their resources partitioning. The analysis of resource exploitation (Relative frequency, Feinsinger niche breadth, Pianka niche overlap and Ivlev’s electivity indexes) showed that waterbird species inhabiting the lake wetland have several similarities in using the different habitat categories, which lead us to cluster them into 5 guilds (G1: one rails, two grebes and eight ducks; G2: five wading species and one gull; G3: three herons; G4: cormorants, mallards, and on gull; finally, G5: only one species Cattle egret (Bubulcus ibis).Almost all the species were specialists in resource utilization patterns (narrow niche breadths, both under 0.3) and therefore, vulnerable to fluctuations in resources, particularly the feeding habitats. Mean niche overlaps for all the pairs of species ranged from 0.05 to 0.68. The overall pattern in the community was higher niche overlaps between the species of a particular guild than those between other species. According to Ivlev’s electivity index, we found that only three microhabitats from seven were the most important for the discussed species, open water body was the most attractive, followed by meadows, muddy areas and floating- leafed vegetation. Similarities on habitat requirements derived from our region can provide important and optimal wetland management at multi-species assemblage level for this wetland and similar area around the African coast.

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Li, Chunlin, Sen Yang, Daode Zha, Yong Zhang et Willem F. de Boer. « Waterbird Communities in Subsidence Wetlands Created by Underground Coal Mining in China : Effects of Multi-Scale Environmental and Anthropogenic Variables ». Environmental Conservation 46, n^o 1 (14 septembre 2018) : 67–75. http://dx.doi.org/10.1017/s0376892918000292.

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SummaryUnderground coal mining in the North China Plain has created large-scale subsidence wetlands that may attract waterbirds that use them as complementary habitats. However, no study has been conducted to understand avian use of these created wetlands, inhibiting the formulation of effective management plans. Here, we carried out 12 semi-monthly surveys in 55 subsidence wetlands during the 2016–2017 migration and wintering period and performed direct multivariate analyses, combined with variance partitioning, to test the effects of multi-scale habitat variables on the waterbird assemblages. A total of 89 349 waterbirds representing 60 species were recorded, with seasonal fluctuations in species richness and bird abundance. Waterbird community structures were shaped by four groups of variables at local, landscape and human levels with different effects among seasons. Anthropogenic disturbance was the most important factor group, negatively affecting most guilds. Waterbirds in this human-dominated environment are under a variety of potential threats that should be further studied. The subsidence wetlands are still expanding, and if managed effectively, may provide important complementary habitats for a wide array of waterbird species, particularly for those migrating along the East Asian–Australasian Flyway. Our study provides key baseline data regarding the waterbird communities and may help with the designing of effective management and conservation plans.

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Fox, Anthony D., Lei Cao, Yong Zhang, Mark Barter, Mei Juan Zhao, Fan Juan Meng et Si Long Wang. « Declines in the tuber-feeding waterbird guild at Shengjin Lake National Nature Reserve, China - a barometer of submerged macrophyte collapse ». Aquatic Conservation : Marine and Freshwater Ecosystems 21, n^o 1 (3 novembre 2010) : 82–91. http://dx.doi.org/10.1002/aqc.1154.

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CUMMING, GRAEME S., MARK PAXTON, JACKIE KING et HANS BEUSTER. « Foraging guild membership explains variation in waterbird responses to the hydrological regime of an arid-region flood-pulse river in Namibia ». Freshwater Biology 57, n^o 6 (13 avril 2012) : 1202–13. http://dx.doi.org/10.1111/j.1365-2427.2012.02789.x.

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LI, DONGLAI, SIHANG CHEN, HUW LLOYD, SHUYU ZHU, KAI SHAN et ZHENGWANG ZHANG. « The importance of artificial habitats to migratory waterbirds within a natural/artificial wetland mosaic, Yellow River Delta, China ». Bird Conservation International 23, n^o 2 (8 avril 2013) : 184–98. http://dx.doi.org/10.1017/s0959270913000099.

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SummaryAnthropogenic conversion of natural wetlands into artificial wetland habitats has produced complex wetland landscapes worldwide. In this study we investigated the responses of migratory and wintering waterbirds to five artificial wetland habitats (aquaculture ponds, paddyfields, irrigation canals, open water reservoirs and saltpans) within a novel natural-artificial wetland landscape, Yellow River Delta (YRD), eastern China from October 2007 to May 2008. The results showed that almost all bird community indicators in the YRD natural wetlands were higher than those in adjacent artificial wetlands. Across the landscape, natural wetlands remained most important for all waterbird guilds, and more than 90% of waterbird populations were dependent on these habitats. Artificial wetlands mainly provided a secondary role, supporting about 70% of waterbird species (including six species that reached 1% of their global or biogeographical flyway populations), but with distinctive functional capacity for specific waterbird guilds in different artificial wetlands. The conservation value of artificial wetlands is often ephemeral, mainly during autumn, for specific migratory waterbirds and complements that of remaining areas of natural wetlands. Therefore, the utilisation patterns of artificial wetlands are highly temporal and the majority of species are dependent on areas of natural wetland. A comprehensive study of the inter-seasonal and inter-annual variations in these different habitats and dependence by the various guilds in the YRD is required to enable the true value of these habitats to be understood. We suggest that the conservation of artificial wetlands should not be at the expense of natural wetlands, which should remain the priority for wetland landscape management. Management to maintain the existing artificial wetlands for migrating and wintering water birds should target habitat features that are absent or limited in natural wetlands thus increasing the carrying capacity of the YRD landscape.

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Morkūnė, Rasa, Jolita Petkuvienė, Modestas Bružas, Julius Morkūnas et Marco Bartoli. « Monthly Abundance Patterns and the Potential Role of Waterbirds as Phosphorus Sources to a Hypertrophic Baltic Lagoon ». Water 12, n^o 5 (14 mai 2020) : 1392. http://dx.doi.org/10.3390/w12051392.

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Compared to external loads from tributaries and sediment recycling, the role of waterbirds as phosphorus (P) sources in estuaries is overlooked. We performed monthly ship-based surveys of waterbird abundance in the Lithuanian part of the Curonian Lagoon, calculated their potential P excretion, and compared its relevance to the riverine inputs. Phosphorus excretion rates for the censused species were assessed accounting for variations of body weights, daily feces production and their P content, and assigning species to different feeding and nutrient cycling guilds. During the study period (March–November 2018), 32 waterbird species were censused, varying in abundance from ~18,000–32,000 (October–November) to ~30,000–48,000 individuals (June–September). The estimated avian P loads during the whole study period varied between 3.6 and 25 tons, corresponding to an area load between 8.7 and 60.7 mg P m−2. Waterbird release of reactive P to the system represented a variable but not negligible fraction (1%–12%) of total external P loads, peaking in June–September and coinciding with cyanobacterial blooms. This study is the first in the Baltic Sea region suggesting that waterbirds are potentially important P sources to phytoplankton in large estuaries, in particular, during low discharge periods.

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NAVEDO, JUAN G., JOSÉ A. MASERO, JUAN M. SÁNCHEZ-GUZMÁN, JOSÉ M. ABAD-GÓMEZ, JORGE S. GUTIÉRREZ, ESTHER G. SANSÓN, AUXILIADORA VILLEGAS, EMILIO COSTILLO, CASIMIRO CORBACHO et RICARDO MORÁN. « International importance of Extremadura, Spain, for overwintering migratory dabbling ducks : a role for reservoirs ». Bird Conservation International 22, n^o 3 (5 décembre 2011) : 316–27. http://dx.doi.org/10.1017/s0959270911000311.

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SummaryMany migratory waterbird populations are in decline and loss of natural wetlands is one of the main causes. However, some species may respond positively to artificial wetland recreation. In Extremadura (south-west Europe), several large reservoirs were created for irrigation since the 1960s and some comparatively small reservoirs were built from the late 1990s onwards close to rice fields. Here we analyse the abundance of wintering dabbling ducks (Anas spp.) in Extremadura before (1991–1994) and after (2007–2010) the creation of these new reservoirs in order to address the current importance of the area for this guild within the East Atlantic Flyway (EAF). A mean of 25,277 dabbling ducks wintered in the study area during 1991–1994, increasing to 46,163 individuals during 2007–2010. After controlling for environmental variables, Northern Pintail Anas acuta, Common Teal A. crecca and Northern Shoveler A. clypeata experienced significant increases in the area between both periods, and only Eurasian Wigeon A. penelope suffered a significant decrease. Mallard A. platyrhynchos and Gadwall A. strepera populations did not show any significant trend. The large older reservoirs experienced overall population decreases between the two periods, with four new reservoirs holding more than 35,000 wintering dabbling ducks. Our results reflect an overall improvement in habitat conditions, driven by the creation of reservoirs near to rice fields that could have resulted in a partial redistribution of wintering dabbling ducks in the EAF. The area emerges as one of the most important wintering sites for dabbling ducks in southern Europe, regularly exceeding two of the Ramsar Convention criteria for the conservation of several populations. The protection of these new reservoirs by legal mechanisms would guarantee the existence of a large functional wetland area, which could also mitigate the loss of natural wetlands for populations using the EAF.

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Houston, Wayne, Robert Black, Rod Elder, Leif Black et Richard Segal. « Conservation value of solar salt ponds in coastal tropical eastern Australia to waterbirds and migratory shorebirds. » Pacific Conservation Biology 18, n^o 2 (2012) : 100. http://dx.doi.org/10.1071/pc120100.

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Some human-altered habitats such as saltfields support significant numbers of shorebirds and waterbirds, but their values in tropical eastern Australia are poorly understood. With the continuing loss of shorebird habitats in the East Asian-Australasian Flyway, identification of important habitats and management is important for their conservation. The habitat value of two saltfields associated with the Fitzroy River estuary, Queensland (23.520S, 150.860E) was evaluated by monthly surveys over 33 months and by comparison to previous surveys of nearby natural wetlands. Saltfields supported as many waterbirds and species as freshwater and naturally saline lagoons. Numbers of migratory shorebirds peaked during the southern migration period (September to November), when wetlands in tropical northern Australia are at their lowest extent, thus elevating the conservation value of tropical saltfields to shorebirds. Sharp-tailed Sandpipers were regularly present in numbers exceeding international levels for staging, while Red-necked Stints were just below the staging criterion. Salinity regime was found to influence waterbird communities associated with saltfield pools: piscivores dominating metasaline pools, and shorebirds hypersaline pools. A seasonal pattern of occurrence occurred in some guilds with greatest numbers in the drier months (cormorants, pelicans, ducks and egrets, all significantly negatively correlated with the previous month’s rainfall), most of which bred in nearby natural wetlands during the wet season. Furthermore, cormorants were abundant in the saltfields and fluctuated less compared with natural lagoons during the critical drier months. Overall, saltfields are an integral component of the ecology of the landscape, providing complementary resources to that of the natural wetlands.

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Boros, Emil. « Classification method for quantification of waterbird nutrient cycling guilds ». MethodsX 8 (2021) : 101597. http://dx.doi.org/10.1016/j.mex.2021.101597.

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Basaula, Rajendra, Hari Prasad Sharma, Jerrold L. Belant et Kumar Sapkota. « Invasive Water Hyacinth Limits Globally Threatened Waterbird Abundance and Diversity at Lake Cluster of Pokhara Valley, Nepal ». Sustainability 13, n^o 24 (11 décembre 2021) : 13700. http://dx.doi.org/10.3390/su132413700.

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Invasive species alter ecosystem structure and functioning, including impacts on native species, habitat alteration, and nutrient cycling. Among the 27 invasive plant species in Nepal, water hyacinth (Eichhornia crassipes) distribution is rapidly increasing in Lake Cluster of Pokhara Valley (LCPV) in the last several decades. We studied the effects of water hyacinth on threatened waterbird abundance, diversity, and physico-chemical parameters of water in the LCPV. We found areas with water hyacinth present (HP) had reduced threatened water bird abundance relative to areas where water hyacinth was absent (HA; p = 0.023). The occurrence of birds according to feeding guilds also varied between water hyacinth presence and absence habitats. Piscivorous birds were more abundant in HA areas than HP areas whereas insectivorous and omnivorous birds had greater abundance in HP areas than in HA areas. Threatened waterbird abundance and richness were greater in areas with greater water depth and overall bird abundance but declined in HP areas. Degraded water quality was also identified in HP areas. Our findings can be used as a baseline by lake managers and policy makers to develop strategies to remove or manage water hyacinth in LCPV to improve waterbird conservation.

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MOKHTER, NORMAISHARAH, MUHAMMAD ARIFUDDIN AKHSAN, MUHAMMAD ASRAF AMRAN, JIEN LEE TZE, MD-ZAIRI ZAINAL, MUHAMMAD ABU BAKAR ABDUL-LATIFF et NOR ATIQAH NORAZLIMI. « FEEDING ECOLOGY OF BIRDS IN SELECTED MICROHABITAT IN PULAU TINGGI, JOHOR, MALAYSIA ». JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT 17, n^o 11 (30 novembre 2022) : 68–80. http://dx.doi.org/10.46754/jssm.2022.11.008.

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Understanding the feeding ecologies of birds is a crucial part of conservation purposes. Scholars interpreted terrestrial birds in many journals, yet studies on waterbirds, primarily shorebirds were poorly understood along the Peninsular Malaysia coastal line. Most researchers only record species presence and very few studies were previously conducted on feeding ecologies. Therefore, this study aims to investigate the feeding ecology of the birds in a selected microhabitat in Pulau Tinggi from March until August 2019. The study used mist-netting and direct observation techniques with a video camera and binoculars. A total of 39 species of birds comprising 24 families were censused. Seven feeding guilds were successfully identified. Carnivores dominated the highest species composition with 28%, followed by insectivores at 21%, frugivores and omnivores at 15% each, carnivore-insectivores and frugivore-insectivores at 10% each, and granivorous with 5%. From the analysis, we found no significant difference between the feeding guild and birds’ location of birds’ feeding preferences in forest and coastal zones (z= -1.1, p= 0.31). Understanding the feeding ecology of the birds in a specific ecosystem is vital to understand how the birds exploit their resources and utilize the environment to avoid competition and thus sustain in that ecosystem.

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Pérez-Crespo, María, Juanita Fonseca, Rubén Pineda-López, Eduardo Palacios et Carlos Lara. « Foraging guild structure and niche characteristics of waterbirds in an epicontinental lake in Mexico ». Zoological Studies 52, n^o 1 (2013) : 54. http://dx.doi.org/10.1186/1810-522x-52-54.

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Weller, Milton W. « Use of Two Waterbird Guilds as Evaluation Tools for the Kissimmee River Restoration ». Restoration Ecology 3, n^o 3 (septembre 1995) : 211–24. http://dx.doi.org/10.1111/j.1526-100x.1995.tb00171.x.

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Chatterjee, Asitava, Shuvadip Adhikari, Sudin Pal et Subhra Kumar Mukhopadhyay. « Foraging guild structure and niche characteristics of waterbirds wintering in selected sub-Himalayan wetlands of India ». Ecological Indicators 108 (janvier 2020) : 105693. http://dx.doi.org/10.1016/j.ecolind.2019.105693.

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Miranda-García, María L., Andrés Muñoz-Pedreros et Heraldo V. Norambuena. « Waterbird assemblages of inland wetlands in Chile : A meta-analysis ». Nature Conservation 45 (15 décembre 2021) : 41–61. http://dx.doi.org/10.3897/natureconservation.45.74062.

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Chile has a large number of wetlands that offer a wide variety of refuges and food to waterbird assemblages. This research hypothesises that these assemblages differ according to the structural characteristics of each type of inland wetland. The object is to identify the structure of these assemblages, evaluating their richness, alpha α diversity and some ecological characteristics, taxonomic structures and trophic guilds. We performed a meta-analysis by submitting pre-selected articles to multivariate reliability analysis. The selected articles were used to characterise the assemblages by alpha α diversity: species richness, Shannon-Wiener index, Pielou’s Evenness Index, relative abundance and taxonomic distinctiveness Δ + and beta β diversity: Bray-Curtis with analysis of similarity percentage. Diversity and evenness differed in the seven wetlands studied, among 12 to 45 species, Shannon-Wiener index H’= 0.08 to 0.94 bits and Pielou’s Evenness Index J’= 0.06 to 0.71. Four wetlands were below and three above the expected value for taxonomic distinctiveness (Δ +) (73.2 units). Two clusters were identified using the β diversity: one consisting of the High-Andean wetlands (Huasco and Negro Francisco); and the other of El Peral lagoon, the Cruces River wetlands complex and the Tranque San Rafael man-made wetland. The most remarkable dissimilarity was provided by three species (Cygnus melancoryphus, Phoenicoparrus jamesi and Phoenicoparrus andinus). Zoophagous species that eat invertebrates by the first choice are the dominant group, while in lagoon wetlands phytophages and omnivores are more evenly represented.

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Telailia, Salah, Lamia Boutabia, Mohamed Dhaya El-Hak Khemis, Ali Elafri et Nawel Djebbari. « Multi-annual and seasonal patterns of waterbird assemblages in a Mediterranean coastal lagoon (El Mellah lagoon) of Northeastern Algeria ». Ekológia (Bratislava) 36, n^o 2 (27 juin 2017) : 146–57. http://dx.doi.org/10.1515/eko-2017-0013.

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Abstrat Recently, Mediterranean coastal lagoons have raised considerable environmental concerns. Long-term studies of seasonal changes in waterbird assemblages are therefore extremely important in terms of ecological relevance and conservation of these sensitive ecosystems. An ornithological survey of four years was carried out in a typical costal wetland (El Mellah lagoon) of Northeastern Algeria. Intra-seasonal comparison of waterbird assemblages (diversity indices) demonstrates clear changes between the wintering and the breeding periods. It seems that the first one was rich in term of species number than the second season (43 against 24). In contrast, the breeding seasons were more equilibrate (high values of Simpson, Shannon and evenness index). Additionally, curves in the diversity/dominance diagram revealed that both wintering and breeding assemblages share the same characteristics of community structure, few dominant species (with intermediate relative abundance) and many rare species with the relative abundance lower than 0.1. Invertebrates (25 species) and piscivorous (11 species) are the most abundant guilds over the four years of study (no significant differences among years have been calculated). The marked decline in bird species diversity recorded in this study (in comparison with previous studies) is mainly due to salinity oscillations (due to aquaculture activities) and may be of concern to wetland managers and it might be useful to provide some guidelines about the characteristics that coastal lagoons have to follow in the construction process to enhance the biodiversity.

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Li, Ning, Ning Tang, Zheng Wang et Lin Zhang. « Response of different waterbird guilds to landscape changes along the yellow sea coast : A case study ». Ecological Indicators 142 (septembre 2022) : 109298. http://dx.doi.org/10.1016/j.ecolind.2022.109298.

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Xinjian, Wang, Zhou Lizhi, Chen Jingyun et Fan Shaojun. « Foraging guild structure and niche characteristics of wintering waterbirds at Lake Shengjin, lower reaches of the Yangtze River ». Journal of Lake Sciences 33, n^o 2 (2021) : 518–28. http://dx.doi.org/10.18307/2021.0216.

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Eagles-Smith, Collin A., Joshua T. Ackerman, Susan E. W. De La Cruz et John Y. Takekawa. « Mercury bioaccumulation and risk to three waterbird foraging guilds is influenced by foraging ecology and breeding stage ». Environmental Pollution 157, n^o 7 (juillet 2009) : 1993–2002. http://dx.doi.org/10.1016/j.envpol.2009.03.030.

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Tarakini, Tawanda, Peter Mundy et Hervé Fritz. « Trends in savannah waterbirds : protected area effect and influence of global threats on differing guilds ». Ostrich 91, n^o 2 (2 avril 2020) : 107–17. http://dx.doi.org/10.2989/00306525.2020.1722972.

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Wang, Cheng, Gang Wang, Lingjun Dai, Hongyu Liu, Yufeng Li, Chunqi Qiu, Yi Zhou et al. « Study on the effect of habitat function change on waterbird diversity and guilds in Yancheng coastal wetlands based on structure–function coupling ». Ecological Indicators 122 (mars 2021) : 107223. http://dx.doi.org/10.1016/j.ecolind.2020.107223.

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Hahn, Steffen, Bethany J. Hoye, Harry Korthals et Marcel Klaassen. « From Food to Offspring Down : Tissue-Specific Discrimination and Turn-Over of Stable Isotopes in Herbivorous Waterbirds and Other Avian Foraging Guilds ». PLoS ONE 7, n^o 2 (1 février 2012) : e30242. http://dx.doi.org/10.1371/journal.pone.0030242.

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Boros, Emil, Zarina Inelova, Zsuzsanna Lánczos et Zsolt Végvári. « Waterbird guilds predict environmental attributes of inland saline aquatic ecosystems on multi-spatial scales ». Science of The Total Environment, septembre 2022, 158845. http://dx.doi.org/10.1016/j.scitotenv.2022.158845.

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-Ulman, Yashmita. « Birds in Agroforestry Systems of Ayodhya District, Uttar Pradesh ». Current Journal of Applied Science and Technology, 29 juin 2021, 103–20. http://dx.doi.org/10.9734/cjast/2021/v40i1431485.

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With the fast depletion of area under forest cover due to various anthropogenic factors, it is important that conservation of wild fauna must be focused in human-dominated landscapes such as agroforestry systems. It important to understand the bird diversity of agroforestry systems to develop a baseline to formulate policies encouraging trees in agricultural fields. Fixed radius point counts were placed across the agroforestry systems in Ayodhya district, Uttar Pradesh to determine the diversity and distribution of birds in these systems. A total of 148 bird species belonging to 53 families and 16 orders were recorded from the study area. Passeriformes (76) had the maximum number of bird species. Omnivore (51%) was the dominant feeding guild. According to their residential status, the maximum bird species were resident (76%), followed by winter visitors (21%) and summer visitors (3%). Out of the 148 bird species recorded, eight species were in the threatened category of IUCN Red List and 28 species were rarely sighted birds. This result proves that the agroforestry systems provide a good habitat for the terrestrial as well as waterbirds thus, highlighting the conservation value of this system. Such land use types must therefore be promoted and widely practiced all across the state.

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Qu, Xinyu, Chunyan Du, Haipeng Wu, Ying Xiong, Guanlong Yu, Jiasheng Wang, Juan Dai et al. « Effects of Poplar Ecological Retreat on Habitat Suitability for Migratory Birds in China’s Dongting Lake Wetland ». Frontiers in Environmental Science 9 (20 janvier 2022). http://dx.doi.org/10.3389/fenvs.2021.793005.

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The Poplar Ecological Retreat (PER) project in Dongting Lake wetland is an important measure in response to China’s ecological civilization construction policy, it aims to remove eastern cottonwoods (Populus deltoides) that artificial large-scale planted in this area and restore the natural state of the wetland, and has got a lot of attention by society and scholars. However, as one of the most important wintering place for migratory birds in the world, the impact of PER on migratory bird habitats in Dongting Lake wetland has not been evaluated. In this paper, we used the habitat suitability index model based on remote sensing to explore the impact of PER on the four mainly migratory bird guilds (Anatidae, Charadriidae, Ardeidae and Laridae) in Dongting Lake wetland. The suitability included four grades: poorly (0–25), generally (25–50), moderately (50–75), and highly (75–100). The results showed that the area of poplars in Dongting Lake wetland decreased significantly after PER was implemented. There was a negative correlation between poplar area and moderate grade habitat area of Anatidae and Ardeidae, and a positive correlation between poplar area and general grade habitat area. However, there was no significant change in different grades of habitat area of Charadriidae and Laridae after PER. Thus, PER improved the habitat suitability of Anatidae and Ardeidae, but had no significant effect on the suitability of habitat for Charadriidae and Laridae. These conclusions could provide reference for understanding the living conditions of Dongting Lake wetland waterbirds, determining the priority protection areas and maintaining wetland biodiversity.

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