| 释义 |
equitability, n.|ˌɛkwɪtəˈbɪlɪtɪ|
[f. equitable a.: see -ity.]
Equitableness; spec. in Ecol., the extent to which different species within a community are represented by equal numbers of individuals.
1964Lloyd & Ghelardi in Jrnl. Animal Ecol. XXXIII. 217 There are two components of species diversity, so to speak: number of species and ‘equitability’. (We choose the word ‘equitability’ here rather than ‘evenness’, since numerical equality among the species is too much to expect.) 1975Nature 13 Mar. 105/1 This function..has one major drawback, this being that it compounds species richness (number of species per unit area or in relation to the total number of individuals) and equitability or evenness (the apportionment of individuals among the species present). Ibid., Under such conditions, evolutionary pressures might favour ‘immature’ vegetation types with low equitability in contrast to tropical forest where low perturbation frequency would favour high species richness and equitability. 1987Ibid. 12 Feb. 561/2 Under the present system, UGC tends towards equitability between institutions. |