【摘要】 2017—2020年，采用实地调查和红外相机监测等方法，在浙江淳安千岛湖开展海南鳽种群调查与监测。此次调查结果发现：海南鳽种群在千岛湖分布区域极广，几乎覆盖千岛湖整个湖区。此次调查新增3个分布区域。共记录海南鳽繁殖巢310个、种群个体1 091只，其中成功繁殖巢188个，参与繁殖成鸟621只，当年繁殖幼鸟470只。海南鳽在千岛湖绝大多数选择湖区内植被郁闭度高、无人居住、干扰较少的小岛营巢，繁殖栖息地偏爱以天然次生马尾松为主的针阔混交林。此次调查中繁殖营巢树种有5种，其中马尾松282巢，占90.97%;青冈18巢，占5.81%;香樟8巢，占2.58%;枫香和猴欢喜各1巢，共占0.64%。导致海南鳽繁殖弃巢的原因很多，主要包括人为因素和自然因素2个方面。更多还原

【Abstract】 From 2017 to 2020, field investigation, infrared camera monitoring and other methods were used to investigate and monitor the population of Gorsachius magnificus in Qiandao Lake in Chun’an County of Zhejiang. The investigation results showed that G. magnificus population was widely distributed in Qiandao Lake, covering almost the whole lake area of Qiandao Lake. Three new distribution areas were recorded in this investigation. There were 310 breeding nests and 1 091 individuals of G. magnificus were recorded. Among them, 188 nests were successfully bred, 621 adult birds were bred, and 470 young birds were bred that year. Most nests of G. magnificus were on small uninhabited islands in Qiandao Lake with high vegetation canopy density, and less interference.The breeding habitat was coniferous and broad-leaved mixed forest with natural secondary Pinus massoniana as the main tree species. There were 5 species of breeding and nesting tree species recorded in the investigation. Among them, 282 nests of Pinus massoniana accounted for 90.97%, 18 nests of Cyclobalanopsis glauca accounted for 5.81%, 8 nests of Cinnamomum camphora accounted for 2.58%, and 1 nest of Liquidambar formosana and 1 nest of Sloanea sinensis(Hance) Hemsl. accounted for 0.64%. There were many factors which led to the reproduction and abandonment of nests of G. magnificus, mainly including man-made factors and natural factors.更多还原