草本群落中种多样性维持机制——花期不同步性

Mechanism of Diversity Maintenance in Herbaceous Plant Community: Asynchronism in Flowering Time

以亚高山草甸群落为例，围绕植物种间竞争共存，研究了种间在开花峰值期上的分离问题，试图探索草本植物群落中种多样性维持的机制。研究结果表明２４种在群落中出现频度大于５０％的多年生草本植物的开花峰值期呈均匀性分布。研究结果证明了在种类成分较为丰富的亚高山草甸植物群落中多个种共存和维持较高的多样性，是由于植物种间在竞争上的压力大于系统发育上的压力而在生长发育时间上发生了错位。

This study was focused on the issue of asynchronism occurring in flowering peaks among the major species of a subalpine meadow for the purpose of a better understanding of the mechanism by which a herbaceous plant community maintains its diversity. It was shown that the 24 perennial herbaceous species observed in the meadow, with a more than 50% frequency of occurrence for each, were evenly distributed in time dimension in respect to their flowering peaks. This phenomenon gives an explanation to the high degree of diversity among species in the plant community: it is due to the asynchronism in development of individual species that a relatively large number of species could be maintained in coexistence.