鄱阳湖越冬中期水鸟群落多样性研究

The Community Diversity of Waterbirds During Mid-wintering in Poyang Lake

  • 摘要: 鄱阳湖为东亚—澳大利西亚迁徙路线上重要的水鸟越冬地,长江中下游及东亚地区最大和最重要的候鸟越冬地之一。2017年12月至2018年1月和2018年12月至2019年1月,采用定点直接计数法对鄱阳湖越冬中期水鸟群落进行调查。结果显示:鄱阳湖越冬中期水鸟有7目12科63种,以雁形目和鸻形目的鸟种占绝对优势(69.84%),优势种有豆雁(29.22%)、白额雁(17.96%)和鸿雁(14.54%),雁鸭类数量占总数量的75.62%;在区系组成和居留型上,古北界物种和冬候鸟是鄱阳湖越冬中期主要分布的鸟种,分别占调查种数的76.19%、60.32%,调查还发现有部分夏候鸟在鄱阳湖越冬。调查的水鸟中有国家重点保护鸟类14种,其中国家一级重点保护鸟类5种,国家二级重点保护鸟类9种。列入中日候鸟协定、中澳候鸟协定的鸟类分别44种、15种。列入《中国脊椎动物红色名录》近危等级以上有14种。通过与长江中下游几个重要的越冬湿地水鸟群落相似度比较,发现本次调查的越冬水鸟与东洞庭湖相似度最高(相同种44种),为0.8000。

     

    Abstract: Poyang Lake is an important wintering habitat for waterbirds on the East Asian-Australasian flyway, and is one of the largest and most important wintering habitat for migratory birds in the middle and lower reaches of the Yangtze River and East Asia. From December 2017 to January 2018 and from December 2018 to January 2019, the direct counting method at fixed point was used to investigate the mid-wintering waterbird community in Poyang Lake. The results showed that there were 63 species of waterbirds belonging to 12 families, 7 orders recorded in Poyang Lake. Anseriformes and Charadriiformes were the dominant species at 69.84%. Among them, Anser albifrons accounts for 29.22%, Anser fabalis 17.96% and Anser cygnoid 14.54%. Besides, the number of geese and ducks accounts for 75.62% of the total population. In term of avifauna and the residence type, Palearctic species and winter migrants were the main bird species distributed in the middle of wintering in Poyang Lake, accounting for 76.19% and 60.32% of the surveyed species respectively. Some summer migratory birds were found to overwinter in Poyang Lake, too. Among the surveyed waterbirds, there were 14 species of nationally protected birds, including 5 species of first-class protected birds and 9 species of second-class protected birds. There were 44 species and 15 species of birds listed in the Sino-Japanese Migratory Bird Agreement and the Sino-Australian Migratory Bird Agreement respectively. Fourteen species were evaluated as threatened species in the Red List of China's Vertebrate. By comparing the similarity of waterbird community with several important wintering wetlands in the middle and lower reaches of the Yangtze River, the study found that the overwintering waterbird communities were most similar to those at East Dongting Lake, which had 44 species in common, with a similarity index of 0.8000.

     

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