equitabilityn.

/ˌɛkwɪtəˈbɪlɪti/

Etymology: < equitable adj.: see -ity suffix.

Equitableness; spec. in Ecology, the extent to which different species within a community are represented by equal numbers of individuals.

ΘΚΠ

the world > life > biology > balance of nature > distribution > [noun] > representation of species in a community

equitability1964

evenness1966

1964 Lloyd & Ghelardi in Jrnl. Animal Ecol. 33 217 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.)

1975 Nature 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).

1975 Nature 13 Mar. 105/1 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.

1987 Nature 12 Feb. 561/2 Under the present system, UGC tends towards equitability between institutions.

This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).

单词	equitability
释义	equitabilityn. /ˌɛkwɪtəˈbɪlɪti/ Etymology: < equitable adj.: see -ity suffix. Equitableness; spec. in Ecology, the extent to which different species within a community are represented by equal numbers of individuals. ΘΚΠ the world > life > biology > balance of nature > distribution > [noun] > representation of species in a community equitability1964 evenness1966 1964 Lloyd & Ghelardi in Jrnl. Animal Ecol. 33 217 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.) 1975 Nature 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). 1975 Nature 13 Mar. 105/1 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. 1987 Nature 12 Feb. 561/2 Under the present system, UGC tends towards equitability between institutions. This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018). < n.1964
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