%0 Journal Article
%T The Wintering Habitats of Migrant Birds and Their Relationship with Water Level in Poyang Lake, China<br>鄱阳湖越冬季候鸟栖息地面积与水位变化的关系
%A XIA Shaoxi
%A YU Xiubo
%A FAN Na
%A <br>夏少霞
%A 于秀波
%A 范娜
%J 资源科学
%D 2010
%I 
%X Poyang Lake is the largest lake in China, offering an important stopover site for migratory bird along the East Asian-Australasian Flyway. Lower water levels and longer dry season persisting in Poyang Lake in recent years would affect such a process. In this context a project for Poyang lake water-control project is being launched by the local government. Impact of increased water level on aquatic organisms, especially on waterfowl, has become a significant issue. The purpose of this study is to investigate the effect of water level changes on migratory birds. Considering elements of ecological feature, food selection, and habitat preference of migrant birds during the wintering period, approaches and standards to distinguish bird habitats are presented. In the meanwhile, 25 scenes of satellite imageries from 2000 to 2008 and long time series water level data from 1962 to 2008 were jointly used to classify waterfowl habitats. The relationship among areas of habitat and water level are analyzed in detail. Effects of the planning Poyang Lake key water-control project on migrant birds and their habitats were comprehensively evaluated, with providing measures to conserve wetland and migrant birds. Results indicated that: 1) in terms of feeding characteristics, waterfowl can be conceptually divided to six functional groups, and the diverse functional groups had a variety of feeding targets. Birds select feeding sites in accordance with food abundance and accessibility. Most of waterfowls are distributed along zones with sedge marsh, mudflats, or shallow water less than 60 cm deep; and 2) habitat areas suitable for migrant birds account for roughly one forth to two thirds of the Poyang Lake wetland at different stages in winter. Habitat areas are strongly affected by a changing water level, particularly, more sensitive when the water level is high. Lower water levels in winter and spring had an immaterial effect on birds and their habitats. The habitat area is generally large when the water level reaches 11 m and 12 m (Wusong elevation). The habitat areas sharply shrink with water level rising; In this situation, it is diffcult to find the suitable habitat for birds when water level is higher 14 m (Wusong elevation).
%K Poyang Lake
%K Wetland
%K Migrant birds
%K Habitat
%K Water level<br>鄱阳湖
%K 湿地
%K 候鸟
%K 栖息地
%K 水位
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=8941B1A322A1D7BD8B81ABFEC5B0F80C&yid=140ECF96957D60B2&vid=9971A5E270697F23&iid=708DD6B15D2464E8&sid=414605CF9628FD51&eid=4D046D21DB8AAC5D&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=23