Guanotrophication by Waterbirds in Freshwater Lakes: A Review on Ecosystem Perspective

Adhurya, Sagar; Das, Suvendu; Ray, Santanu

doi:10.1007/978-981-15-0422-8_22

Cited by 14 publications

(6 citation statements)

References 58 publications

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“…The bird species assemblages in a similar wetland bearing significance for the migratory birds, the Santragachi jheel, Howrah, West Bengal, India, 22 bird species were observed (Singha Roy et al 2011). In the Santragachi jheel, the water quality parameter and the growth of the weeds were directly influenced by the abundance of the birds, which provides a reflection of the multifunctional role of the birds in sustaining the wetland ecosystems (Singha Roy et al 2011, Adhurya et al 2020. Among the 22 species, 15 species of birds were migratory (Khan 2010) and were observed through continuous monitoring over several years.…”

Section: Discussionmentioning

confidence: 99%

“…Occupying about 6% of the Earth's surface, they are able to maintain ecological sustainability and by providing suitable habitat for a large number of species established as assets of biodiversity (Gopal & Sah 1995, Zedler & Kercher 2005. However, huge resource availability and habitat suitability makes the wetland favourable place for many of the species; among them, waterbirds are the most important component of that ecosystem (Collar & Andrew 1988, Adhurya et al 2020. Waterbirds absolutely depend on wetland habitat for their existence.…”

Section: Introductionmentioning

confidence: 99%

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Wintering waterbird assemblage in an emerging wetland of West Bengal, India: characterization for conservation management

et al. 2021

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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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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wintering waterbird assemblage in an emerging wetland of West Bengal, India: characterization for conservation management

et al. 2021

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“…The accumulation of organic matter in the sediment promotes a feedback effect, increasing the concentrations of nutrients in the water column and facilitating the growth of primary producers. This phenomenon is common in eutrophic lakes and known as internal fertilization (Schauser & Chorus, 2007) and promotes resuspension of refractory material (uric acid) contained in bird feces (Adhurya et al, 2020).…”

Section: Lake Paleolimnology and Historical Limnologymentioning

confidence: 99%

“…The limited influence of birds in freshwater environments seems The combined use of paleolimnological and long-term limnological… Acta Limnologica Brasiliensia, 2022, vol. 34, e28 to occur frequently when drainage sources are important (Adhurya et al, 2020). Therefore, the continued cultural eutrophication process to which this lake is subject led to organic contamination resulting in blooms of cyanobacteria, alternating with massive macrophyte proliferation.…”

Section: Lake Paleolimnology and Historical Limnologymentioning

confidence: 99%

The combined use of paleolimnological and long-term limnological information to identify natural and anthropogenic environmental changes

et al. 2022

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Aim Urbanization leads to rapid changes in ecosystem structure and function. Wetlands on university campuses under urbanization pressure could be used as case studies of multidisciplinary aquatic research and good environmental practices promoting sustainability. Methods A paleolimnological study was undertaken in a semi-artificial lake on a university campus in southern Brazil to trace historical impacts and ecological changes back to the mid-1970s through complementary approaches: historical data, nutrients, δ13C and δ15N stable isotopes, diatoms, microplastics and associated microbial community analysis. Results The eutrophication process started to intensify after the lake was used for nocturnal roosting by waterbirds, and especially after the establishment of constructions along the margins with septic tank sanitary sewage, which eventually spilled and leached into the lake. Over decades, we identified a limnological hypertrophication process leading to recurrent cyanobacterial blooms and massive macrophyte proliferation coupled with changes in isotopic ratios and algal occupation with several transitions between shallow lake alternative states. Such a limnological process has resembled the paleolimnological eutrophication trends and isotopic changes in sedimentary organic matter. The microplastic deposition was detected as a proxy for the intensification of urbanization, especially during the construction of the University facilities. Conclusions The combined use of paleolimnological and historical limnological data represents a powerful approach for inferring both natural and cultural impacts on the lake, and identifying management strategies based on such scientific information.

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“…These large bird populations, relative to the size and/or volume of the waterbody, can have a significant fraction of the internal P load cycling through their diet. Waterfowl have the potential to affect wetland P cycling by altering the form of P and by inputting and/or exporting P to and/or from external areas to the wetland (Adhurya et al, 2020;Scherer et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of sediment phosphorus in a Ramsar wetland

Crocker

Blake

Hutchinson

et al. 2021

Science of The Total Environment

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Guanotrophication by Waterbirds in Freshwater Lakes: A Review on Ecosystem Perspective

Cited by 14 publications

References 58 publications

Wintering waterbird assemblage in an emerging wetland of West Bengal, India: characterization for conservation management

Wintering waterbird assemblage in an emerging wetland of West Bengal, India: characterization for conservation management

The combined use of paleolimnological and long-term limnological information to identify natural and anthropogenic environmental changes

Spatial distribution of sediment phosphorus in a Ramsar wetland

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