植物生态学报 ›› 1996, Vol. 20 ›› Issue (6): 543-548.

• 论文 • 上一篇    下一篇

异质性生境中的植物克隆生长:风险分摊

董,鸣   

  • 发布日期:1996-06-10
  • 通讯作者: 董 鸣

Plant Clonal Growth in Heterogeneous Habitats: Risk-spreading

Dong Ming   

  • Published:1996-06-10
  • Contact: Mi Xiang-cheng

摘要: 在异质生境中克隆生长使克隆分株处于不同的小生境中,从而将基株死亡风险以不同方式分摊。分摊有利于维持或提高基株适合度,因此,植物克隆生长被认为具有对小尺度生境异质性的生态对策性意义。拟—年生克隆草本Trientalis europaea对养分梯度的反应给出了基株风险分摊的实例。文中提出—个关于分株间连接维持时间对生境异质性反应的假说。

Abstract: As clonally growing in heterogeneous environments, a single genet may place its ramets in different microhabitats. In this process, mortality (risk) of the genet is spreaded. Risk-spreading makes a great contribution to maintenance of or even increase in genet fitness. Therefore, clonal growth was considered having adaptive value, particularly in fine-scale heterogeneity of environment. Responses of a pseudoannual clonal herb, Trientalis europaea, to a nutrient gradient provides an example of genet riskspreading. Meanwhile, a hypothesis on the relationship between the maintenance of ramet-between connection and the enviromental heterogeneity is proposed.