应用生态学报2013，Vol.24Issue(2)：527-534,8.
环境因子对东洞庭湖优势冬季水鸟分布的影响
Effects of environmental factors on the distribution of dominant wintering waterfowl species in East Dongting Lake wetland, South-central China
摘要
Abstract
East Dongting Lake is one of the national nature reserves in China, and an important habitat for the wintering of waterfowls in China, and even, global wetlands. To study the relationships between waterfowl community and environmental factors is of vital significance in providing useful data and necessary information for the restoration of bird habitat. In the winters of 2010 and 2011, a survey was conducted on the wintering waterfowls in East Dongting Lake wetland, and canonical correspondence analysis (CCA) was adopted to reveal the relationships between the distribution of dominant wintering waterfowl species and environmental factors. The partial CCA was also employed to assess the respective importance of environmental factors on the waterfowl species distribution and diversity. The factors including the distance to roads, distance to residents, patch density, number of vegetation types, water area, and sedge area had significant effects on the waterfowl distribution (P<0.05), with the affecting intensity in the order of sedge area > patch density > distance to residents > number of vegetation types > water area > distance to road. Sedge area and patch density had highly significant effects (P<0.01) on the distribution of the waterfowls, being the two major factors affecting the wintering waterfowls in the wetland, while landscape diversity index and reed area had no significant effects (P>0.05). The regression analysis showed that environmental factors had different effects on the species richness. The richness of Platalea leucorodia, Anas falcata, and Calidris alpina decreased with the increase of sedge area, while increased with the increase of patch density. However, the richness of Anser fabalis, Anser albifrons, Anser erythro-pus, and Anas crecca increased with increase of sedge area while decreased with the increase of patch density. It was suggested that the distribution of wintering waterfowls in East Dongting Lake wetland was affected by a variety of environmental factors, among which, sedge area and patch density played the most important roles.关键词
冬季水鸟/东洞庭湖/环境因子/典范对应分析/t值双序图Key words
wintering waterfowl/ East Dongting Lake/ environmental factor/ canonical correspondence analysis (CCA)/ t-value biplot分类
资源环境引用本文复制引用
袁玉洁,梁婕,黄璐,龙勇,申升,彭也茹,武海鹏,曾光明..环境因子对东洞庭湖优势冬季水鸟分布的影响[J].应用生态学报,2013,24(2):527-534,8.基金项目
国家自然科学基金项目(51039001,51009063)、国务院三峡委员会项目(SX2010-026)和广州白云湖水质改善项目(BYHGLC-2010-02)资助. （51039001,51009063）
