宁夏沙坡头繁殖鸟类群落及演替的研究

Studies on Breeding Bird Community and Its Succession in Shapotou of Ningxia Autonomous Region,China

本文研究沙坡头地区5个繁殖鸟群落及其演替规律。顶极群落荒漠草原—凤头百灵群落多样性指数最低。鸟类群落多样性指数不仅与群落中种的多少相关,也与群落中各种的个体均匀度、优势度相关。在群落的一系列演替过程中,相衔接的演替阶段的群落相似性程度较高.沙坡头地区鸟类群落自然演替最终都导向荒漠草原—凤头百灵群落,这是荒漠气候条件下的顶极.

The paper deals with five breeding bird communities and their succession of regular pattern iu Shapotou,Ningxia Autonomous Region.Theres is tile lowest diversity index in the climax Desert-glasslands-Crested Larkcommunity.The diver sity index of the bird communities not only correlatesto the number of species in the community,but also to individual distributedevenness and dominace in the community.This tallies with the findingsof Shannon-wiener(1949).In the sere there is greater similar index betweentwo seral stages which join each other.In natural succession the birdcommunities are eventually developed into the Desert-glasslands-CrestedLark community in the area,the community is the climax in the desertcondition.