文献类型：期刊文献

英文题名：Different Diets in the Same Habitat: How Food Resource Distribution Shapes the Foraging Preferences of Shorebirds in Hangzhou Bay

作者：Chen, Dingda[1,2] Jia, Yifei[3] Yao, Kekan[4] Jiao, Shengwu[1] Jing, Lei[2] Wu, Ming[1]

第一作者：Chen, Dingda

通信作者：Jiao, SW[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, State Key Lab Wetland Conservat & Restorat, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou, Peoples R China;[2]Cent South Univ Forestry & Technol, Sch Coll Forestry, Changsha, Peoples R China;[3]Beijing Forestry Univ, Ctr East Asian, Sch Ecol & Nat Conservat, Australasian Flyway Studies, Beijing, Peoples R China;[4]Wetland Ecosyst Res Stn Xixi, Hangzhou Xixi Natl Wetland Pk Ecol & Culture Res C, Hangzhou, Peoples R China

年份：2025

卷号：15

期号：9

外文期刊名：ECOLOGY AND EVOLUTION

收录：;Scopus(收录号：2-s2.0-105015374183);WOS:【SCI-EXPANDED(收录号:WOS:001566640100001)】；

基金：This work was funded by the Research Institute of Subtropical Forestry, Chinese Academy of Forestry (CAFYBB2024ZA033).

语种：英文

外文关键词：food source; foraging preferences; Hangzhou Bay; shorebirds

摘要：The Hangzhou Bay wetland is a crucial stopover site along the East Asian-Australasian Flyway. However, as wetland areas decrease and environmental changes occur, waterbirds have to adjust their dietary strategies to adapt to the available resources. In this study, the diet composition of 11 waders in Hangzhou Bay, China, was assessed via stable isotope analysis technology. The results showed that Gastropoda, which were at the lowest trophic level of five food sources, dominated the diet of shorebirds due to their large number and easy capture, with an average contribution rate of 32.7%. Numenius madagascariensis, Numenius phaeopus, Arenaria interpres, and Anarhynchus leschenaultii showed a relatively "specialized" foraging preference for Gastropoda, with a contribution rate of more than 35%. Other waders showed a more balanced foraging strategy, distributing their feeding more evenly among the five benthic taxa. Foraging preference is not only affected by food supply but also by the physical conditions and survival strategies of waders. For example, the curlews use their slender beaks to probe deep in the sediment, while plovers rely on visual detection to capture prey exposed on the surface of the mudflat. This study highlights the ecological plasticity of shorebird food utilization and emphasizes the importance of optimizing benthic community structure and increasing the supply of highly nutritious food for effective habitat management. These findings provide valuable insights into wetland restoration and shorebird conservation.