兰州市区黄河段雁鸭类迁徙动态及环境结构对其的影响

1991年10月至1992年5月对兰州市黄河段雁鸭类群落进行了调查研究。数量变动分析结果表明:16种雁鸭中,越冬雁鸭类仅占5种,过路鸭11种。迁来时间为10月下旬,迁走在次年5月中旬;数量稳定期在12月下旬至次年3月上旬;南迁集中期在11月中下旬,北返集中期在3月中下旬。为保护好兰州市区越冬雁鸭类,本文对改善城市环境结构提出了几点建议。

THE MIGRATING TENDENCY OF ANSERIFORMES AND THE EFFECTS OF THE ENVIRONMENTAL STRUCTURES ON THEM IN URBAN AND SUBURBAN AREAS OF LANZHOU, CHINA

A survey on Anseriformes was carried out from October, 1991 to May, 1992 in urban and suburban areas of Lanzhou. 16 species of Anseriformes were found in this area. Of them 5 species were overwintering birds and 11 species were passing birds. The immigrating time was in the last decade of October and the emigrating time was in the second decade of May next year. The stable period for the numbers was from the last decade of December to the first decade of March next year. They migrated south mainly in the second and last decades of November and back to the North in the second and last decades of March next year. In order to protect the Anseriformes in Lanzhou, suggestions for the improvement of the urban environmental structures are given here.