Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh
Analysis of long-term datasets on bird populations can be used to answer ecological and management questions that are useful for conservation. Tanguar Haor (9500 ha) is one of the major freshwater wetlands in Bangladesh and supports a large number of migratory and resident waterbirds. Because of its...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Resilience Alliance
2023-06-01
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| Series: | Avian Conservation and Ecology |
| Subjects: | |
| Online Access: | https://www.ace-eco.org/vol18/iss1/art18/ |
| _version_ | 1827912286096850944 |
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| author | A B M Sarowar. Alam Sakib Ahmed Kazi Zenifar. Azmiri Raquibul Amin Mariëlle Liduine. van Toor Ashis Kumar. Datta Jonas Waldenström Enam Ul. Haque Sayam U. Chowdhury |
| author_facet | A B M Sarowar. Alam Sakib Ahmed Kazi Zenifar. Azmiri Raquibul Amin Mariëlle Liduine. van Toor Ashis Kumar. Datta Jonas Waldenström Enam Ul. Haque Sayam U. Chowdhury |
| author_sort | A B M Sarowar. Alam |
| collection | DOAJ |
| description | Analysis of long-term datasets on bird populations can be used to answer ecological and management questions that are useful for conservation. Tanguar Haor (9500 ha) is one of the major freshwater wetlands in Bangladesh and supports a large number of migratory and resident waterbirds. Because of its unique ecological and economic values, it is arguably the most notable wetland in the floodplains of northeast Bangladesh and in the region. This Ramsar site supports globally important populations of threatened waterbirds, such as the Baer’s Pochard Aythya baeri, Common Pochard Aythya ferina, Falcated Duck Mareca falcata, Ferruginous Duck Aythya nyroca, Oriental Darter Anhinga melanogaster, and Black-tailed Godwit Limosa limosa. Considering the international significance of this site, knowledge gaps on waterbird population trends, and key ecological factors, we conducted waterbird census between 2008 and 2021 to identify priority sites for conservation, population trends of resident and migratory waterbirds, and environmental factors that influence their abundances. We recorded a total of 69 species of waterbirds (maximum count of 166,788 individuals in 2013) and assessed population trends of 47 species. Of these, peak counts of 15 species exceeded the 1% threshold of their Asian-Australian Flyway population estimates. Most species (59%) showed a declining trend, including the critically endangered Baer’s Pochard and the vulnerable Common Pochard, and 16 species (41%) showed an increasing trend. Based on the abundance and species diversity, we have identified Chotainna beel and Lechuamara beel as conservation priority sites within the Haor complex and discuss key threats to these areas. We also offer evidence that adjusting water-level management to annual rainfall patterns could be a useful intervention for waterbird management. Involving local communities in conservation efforts by creating bird sanctuaries within the Haor complex will strengthen waterbird conservation in the country and along the East Asian-Australian Flyway. |
| first_indexed | 2024-03-13T02:14:47Z |
| format | Article |
| id | doaj.art-3271d75477e348eaa2ad8535a525ddc1 |
| institution | Directory Open Access Journal |
| issn | 1712-6568 |
| language | English |
| last_indexed | 2024-03-13T02:14:47Z |
| publishDate | 2023-06-01 |
| publisher | Resilience Alliance |
| record_format | Article |
| series | Avian Conservation and Ecology |
| spelling | doaj.art-3271d75477e348eaa2ad8535a525ddc12023-06-30T17:42:41ZengResilience AllianceAvian Conservation and Ecology1712-65682023-06-01181182405Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast BangladeshA B M Sarowar. Alam0Sakib Ahmed1Kazi Zenifar. Azmiri2Raquibul Amin3Mariëlle Liduine. van Toor4Ashis Kumar. Datta5Jonas Waldenström6Enam Ul. Haque7Sayam U. Chowdhury8IUCN BangladeshIUCN BangladeshIUCN BangladeshIUCN BangladeshCentre for Ecology and Evolution in Microbial Model Systems, Linnaeus UniversityDepartment of Zoology, Jahangirnagar UniversityZoonotic Ecology and Epidemiology, Faculty of Health and Life Sciences, Linnaeus UniversityBangladesh Bird ClubConservation Science Group, Department of Zoology, University of CambridgeAnalysis of long-term datasets on bird populations can be used to answer ecological and management questions that are useful for conservation. Tanguar Haor (9500 ha) is one of the major freshwater wetlands in Bangladesh and supports a large number of migratory and resident waterbirds. Because of its unique ecological and economic values, it is arguably the most notable wetland in the floodplains of northeast Bangladesh and in the region. This Ramsar site supports globally important populations of threatened waterbirds, such as the Baer’s Pochard Aythya baeri, Common Pochard Aythya ferina, Falcated Duck Mareca falcata, Ferruginous Duck Aythya nyroca, Oriental Darter Anhinga melanogaster, and Black-tailed Godwit Limosa limosa. Considering the international significance of this site, knowledge gaps on waterbird population trends, and key ecological factors, we conducted waterbird census between 2008 and 2021 to identify priority sites for conservation, population trends of resident and migratory waterbirds, and environmental factors that influence their abundances. We recorded a total of 69 species of waterbirds (maximum count of 166,788 individuals in 2013) and assessed population trends of 47 species. Of these, peak counts of 15 species exceeded the 1% threshold of their Asian-Australian Flyway population estimates. Most species (59%) showed a declining trend, including the critically endangered Baer’s Pochard and the vulnerable Common Pochard, and 16 species (41%) showed an increasing trend. Based on the abundance and species diversity, we have identified Chotainna beel and Lechuamara beel as conservation priority sites within the Haor complex and discuss key threats to these areas. We also offer evidence that adjusting water-level management to annual rainfall patterns could be a useful intervention for waterbird management. Involving local communities in conservation efforts by creating bird sanctuaries within the Haor complex will strengthen waterbird conservation in the country and along the East Asian-Australian Flyway.https://www.ace-eco.org/vol18/iss1/art18/bangladesh waterbirdseaa flywaypopulation trendramsar sitewetlandwintering site |
| spellingShingle | A B M Sarowar. Alam Sakib Ahmed Kazi Zenifar. Azmiri Raquibul Amin Mariëlle Liduine. van Toor Ashis Kumar. Datta Jonas Waldenström Enam Ul. Haque Sayam U. Chowdhury Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh Avian Conservation and Ecology bangladesh waterbirds eaa flyway population trend ramsar site wetland wintering site |
| title | Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh |
| title_full | Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh |
| title_fullStr | Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh |
| title_full_unstemmed | Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh |
| title_short | Population trends and effects of local environmental factors on waterbirds at Tanguar Haor freshwater wetland complex in northeast Bangladesh |
| title_sort | population trends and effects of local environmental factors on waterbirds at tanguar haor freshwater wetland complex in northeast bangladesh |
| topic | bangladesh waterbirds eaa flyway population trend ramsar site wetland wintering site |
| url | https://www.ace-eco.org/vol18/iss1/art18/ |
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