| 单词 | alpha diversity |
| 释义 | > as lemmasalpha diversity alpha diversity n. Ecology the number of different species (esp. of animals and plants) occurring in a particular area or ecosystem, used as a measure of biodiversity. ΚΠ 1960 R. H. Whittaker in Ecol. Monogr. 30 320/1 Fisher's..alpha index is one means of measuring this [sc. species richness in a given area], which may be designated primary or ‘alpha’ diversity. 1983 Biotropica 15 223 Year-round availability of fruit and flowers and very large insects account for much of the high alpha-diversity in the tropics. 2005 A. Burdick Out of Eden (2006) xxi. 287 If a New York snail invades San Francisco Bay, and a San Francisco snail invades New York harbor, the alpha diversity in both locations has increased, but the beta diversity has decreased, as the two environments now share two species. < as lemmas |
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