内蒙古乌审召察汗淖尔遗鸥繁殖群数量及繁殖点分布变化

Variation of Distribution Points and Population Numbers of Breeding Relict Gull at Chahan Nur in Wushenzhao,Inner Mongolia

2015—2020年每年的5—6月,对内蒙古自治区鄂尔多斯市乌审召镇察汗淖尔的遗鸥Ichthyaetus relictus繁殖数量和繁殖点分布进行了监测和研究。结果表明,2015—2020年遗鸥繁殖种群数量分别为2000巢、364巢、2782巢、3360巢、3407巢和3914巢。除2016年外,该地的繁殖遗鸥种群数量一直呈增长态势。6年间共记录12个有遗鸥繁殖巢群分布的湖心岛,其中4个较稳定,一直维持着该地绝大多数遗鸥繁殖群数量。该地已成为遗鸥一个重要的繁殖地。因此,呼吁相关部门对这一湿地进行重点保护和监管。

The distribution points and population size of breeding relict gulls(Ichthyaetus relictus)were monitored and studied at Chahan Nur,Inner Mongolia,from May to June,2015 to 2020.The results showed that the annual population sizes of breeding relict gulls across the 6-year period were 2000 nests,364 nests,2782 nests,3360 nests,3407 nests and 3914 nests,respectively,and showed an ever-increasing trend except in 2016.A total of 12 islets were recorded as the breeding sites,and 4 stable islets were found to maintain the most breeding populations.Chahan Nur has become an important breeding site for relict gulls.Therefore,it is suggested that this wetland should be well conserved and monitored by the government.