生物多样性 ›› 1997, Vol. 05 ›› Issue (3): 161-167.DOI: 10.17520/biods.1997026

• 论文 •    下一篇

群落内物种多样性发生与维持的一个假说*

张大勇,姜新华   

  1. (兰州大学生物系干旱农业生态国家重点实验室,  兰州 730000)
  • 收稿日期:1996-08-19 修回日期:1996-11-26 出版日期:1997-08-20 发布日期:1997-08-20

A hypothesis for the origin and maintenance of within-community species diversity

Zhang Dayong, Jiang Xinhua   

  1. Department of Biology & State Key Laboratory of Arid Agroecology , Lanzhou University , Lanzhou  730000
  • Received:1996-08-19 Revised:1996-11-26 Online:1997-08-20 Published:1997-08-20

摘要:

本文根据作者对竞争排除法则的研究而提出了一个新的群落多样性假说。按照作者的观点,占用相同生态位的物种可以稳定共存;这样,群落内物种多样性将受到4个基本因子所控制。它们分别是:(Ⅰ)生态位的数量;(Ⅱ)区域物种库的大小;(Ⅲ)物种迁入速率,以及(Ⅳ)物种灭绝速率。该假说强调区域生物地理过程与局域生态过程共同决定了群落内种多样性的大小及分布模式。

Abstract:

This paper formulates a novel hypothesis of community diversity on the basis of rejecting the competitive exclusion principle. Since we accept the view that many species could occupy the same niche, local species diversity is considered to be controlled by four fundamental factors,which are, respectively,(Ⅰ)the number of niches in the community,(Ⅱ)the size of regional species-pool, (Ⅲ) species immigration rate, and(Ⅳ) species extinction rate. The hypothesis suggests that both regional biogeographic processes and local ecological processes will play an important role in determining the magnitude and pattern of community diversity.