| 单词 | keystone species |
| 释义 | > as lemmaskeystone species keystone species n. Ecology a species exerting a major influence on an ecosystem, esp. one on whose activities the survival of other species depends. ΚΠ 1969 R. T. Paine in Amer. Naturalist 103 92 These individual populations are the keystone of the community's structure, and the integrity of the community and its unaltered persistence through time, that is, stability, are determined by their activities and abundances... The two keystone species discussed above have little in common. 1989 Green Mag. Oct. 7/3 Elephants are a keystone species in the foodweb for other animals, clearing the bush, opening up water holes, and dispersing seeds. 2009 Independent 2 Nov. 13/3 The huarango..is the ecological keystone species in the desert zone. < as lemmas |
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