Migratory Connectivity of Zhejiang, with a Critical Stopover in East Asian-Australasian Flyway, Based on Recovery Data

• Published in: Animals (Basel) Vol. 14; no. 16; p. 2404
• Main Authors: Liu, Baoquan, Gao, Hongdi, Wang, Jinhui, Zhu, Zhenxian, Qian, Cheng, Fan, Zhongyong, He, Ke
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 19.08.2024; MDPI
• Subjects: Bird migration; Citizen scientists; Climate change; Coasts; Connectivity; EAAF; Habitats; migratory connectivity; Ornithological research; Population; Protection and preservation; recovery of bird-ringing; Variance analysis; waterbirds; Wetlands; Wildlife conservation; Zhejiang coast; Mongolia; South Korea; Singapore; China; East Asia; Thailand; Australia; Russia; Zhejiang China; Yellow Sea; Hangzhou Bay; EAAF; Zhejiang coast; migratory connectivity; recovery of bird-ringing; waterbirds
• ISSN: 2076-2615; 2076-2615
• DOI: 10.3390/ani14162404

Understanding migratory routes is crucial for the conservation of birds and their habitats. Zhejiang is a crucial stopover and wintering area for birds in the East Asian-Australasian Flyway; however, detailed information on this area, and particularly on connections between coastal areas, is limited. By synthesizing ringed and recapture records from local bird-ringing projects and re-sighting community science data (208 records of 35 species), we established migratory connectivity between the Zhejiang coast and nine countries (i.e., Russia, Mongolia, the United States, Korea, Japan, Malaysia, Singapore, Thailand, and Australia), as well as eleven sites within China, and established its crucial role in this flyway. Stopover fidelity was verified by some species with high recapture frequency (seven species exceeded 1%) and species with duplicated re-sighted records (seven Black-faced Spoonbill, one Dalmatian Pelican, and two Spoon-billed Sandpiper individuals). We identified six areas-Hangzhou Bay, Aiwan Bay, Xuanmen National Park, Wenzhou Bay, the reclaimed area between the Ou and Feiyun Rivers, and the Wenzhou Jiangnan Reclamation Area-as crucial stopovers and wintering refuges for waterbirds. Notably, in Xuanmen National Park and the coastal regions along Wenzhou, there were many recovery records for flagship species, such as the Black-faced Spoonbill and Spoon-billed Sandpiper. There were several cases of the recovery of the same individual studied across the years. These findings indicate that these unprotected wetlands require particular attention. Broadly, our findings highlight the feasibility of integrating comprehensive ringing projects with citizen science data to formulate effective conservation strategies and underscore the critical importance of the Zhejiang Coast for migratory waterbirds, particularly those with high conservation concerns, emphasizing the need to mitigate the threats faced by these vulnerable populations.