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<p>The current study investigated avian diversity correspondence with the potential threats to their habitat in and around Rudrasagar Lake. This study designed extensive field surveys at sixteen sites following distance point counting and fixed transect methods for birds’ quantification. Currently, total 56 avian species were recorded, of which 55.35% species primarily inhabit waterbody peripheral terrestrial (WPT) zone, while 28.57% prefer to forage in swampy zones around the edge of the water body (EWB). Only 16.07% of bird species were recorded in open water bodies (IOW). The study also stratified 85.74% of the bird species as residents and 14.28% as migrants. Network mapping also&#xa0;showed that omnivores were the most prevalent (41.07%) while insectivores (16.07%) and herbivores (10.07%) were less common due to their specific diets. Shannon-Weiner (<i>H’</i>), Simpson (<i>Ds</i>) and Pielou’s (<i>J’</i>) indices indicated higher species diversity and relatively even distribution among the WPT community. Bird diversity was observed lowest at Rajghat which experienced the highest degree of anthropogenic disturbances for traditional tourism and recreational activities. Surface area reduction for encroachment posed a substantial threat to habitat health for IOW birds. Near-threatened and vulnerable species like Oriental darter, Common pochard and Painted stork recorded in 2002 are conspicuously absent from recent surveys. Declining avian population and local extinctions related to wetland degradation is considered a serious threat. Proposed management plan implied the requirement to conserve this enclave in accordance to increase the avian population and habitat sustainability. Therefore, this scholarly work drew immediate attention to develop management strategies for avian species conservation.</p>

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Investigating avian fauna diversity and exploring their possible threats in and around wet-landscape of Rudrasagar lake: an Indian Ramsar site

  • 期刊论文

  • 发表日期：

    2025年2月17日

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  • Arpita Biswas,
  • Pradip Debnath,
  • Arjan Basu Roy,
  • Lina Chatterjee,
  • Bulganin Mitra,
  • Saptarshi Mitra,
  • Punarbasu Chaudhuri

摘要

The current study investigated avian diversity correspondence with the potential threats to their habitat in and around Rudrasagar Lake. This study designed extensive field surveys at sixteen sites following distance point counting and fixed transect methods for birds’ quantification. Currently, total 56 avian species were recorded, of which 55.35% species primarily inhabit waterbody peripheral terrestrial (WPT) zone, while 28.57% prefer to forage in swampy zones around the edge of the water body (EWB). Only 16.07% of bird species were recorded in open water bodies (IOW). The study also stratified 85.74% of the bird species as residents and 14.28% as migrants. Network mapping also showed that omnivores were the most prevalent (41.07%) while insectivores (16.07%) and herbivores (10.07%) were less common due to their specific diets. Shannon-Weiner (H’), Simpson (Ds) and Pielou’s (J’) indices indicated higher species diversity and relatively even distribution among the WPT community. Bird diversity was observed lowest at Rajghat which experienced the highest degree of anthropogenic disturbances for traditional tourism and recreational activities. Surface area reduction for encroachment posed a substantial threat to habitat health for IOW birds. Near-threatened and vulnerable species like Oriental darter, Common pochard and Painted stork recorded in 2002 are conspicuously absent from recent surveys. Declining avian population and local extinctions related to wetland degradation is considered a serious threat. Proposed management plan implied the requirement to conserve this enclave in accordance to increase the avian population and habitat sustainability. Therefore, this scholarly work drew immediate attention to develop management strategies for avian species conservation.