鼢鼠土丘植被演替过程中的种的生态位分析  

Niche analysis of species in vegetative succession on zokor mounds

作　　者：王刚[1] 杜国祯 

机构地区：[1]兰州大学生物系 [2]甘南州畜牧学校

出　　处：《生态学杂志》1990年第1期1-6,14,共7页Chinese Journal of Ecology

摘　　要：一、引言在甘南亚高山草甸草场上,鼢鼠掘洞,其抛出物形成土丘,破坏了草场自然植被,同时也开始了恢复演替的过程。此演替过程主要由两种因子促成:一是由人畜践踏和自然落实而致的土丘紧实度的增加;二是先后侵入土丘的群落组分种的种间竞争。整个演替系列,以萼果香薷等相对的r 对策种的侵入开始。The niche overlap and niche volume of ten dominant species were measured on indirect ha-bitat gradients with improved formula measuring niche overlap.Niche ordination,from theoverlap matrix resulted in a r-K continuum of successional gradients,and based on it,theecological strategy of successional species was described quantitatively.

关 键 词：植被演替 生态位 r-K连续统 

分 类 号：Q948.154[生物学—植物学]