重庆库区不同海拔段繁殖鸟类群落的物种多样性

1996~1997年,对三峡工程重庆库区的鸟类群落的物种组成和种群数量进行了调查,共调查记录库区繁殖鸟类12目40科170种,数量17326只,其中留鸟有104种,占繁殖鸟总数的61.2%,夏侯鸟66种,占38.8%.用秩-多度曲线对不同海拔段的繁殖鸟类群落进行多样性分析的结果显示:1)秩-多度曲线方法的结果比Shannon-Wiener等物种多样性指数更直观,能更全面地反映多样性状况,该曲线可以对不同群落或相同群落在不同时间的物种多样性进行比较,是分析生物多样性的一种最直观的方法;2)人类干扰是影响各海拔段繁殖鸟类群落物种多样性的主要因素,人类干扰越强烈,鸟类群落物种多样性越低.图2表3参20

Species Diversity of Breeding Bird Communities at Different Elevations in Chongqing Section of the Three Gorges Reservoir Region

A survey of the community composition and population sizes of birds was conducted in the Three Gorges Reservoir within 14 counties of Chongqing from 1996 to 1997. 17 326 individuals of breeding birds, belonging to 170 species in 40 families of 12 orders, were recorded. The species diversity analyses for the breeding birds in four different elevation areas were conducted with the method of rank-abundance curves and the result suggested: 1) the method of rank-abundance curves was more observable and convenient for comparing species diversities of different communities or the same communities at different time than other methods; and 2) anthropological disturbance was the major factor influencing the species diversity of the breeding bird communities at all elevations. Intensive anthropological disturbance would result in a lower diversity. Fig 2, Tab 3, Ref 20