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ecospace
ecospace n. 
/ˈɛkəʊspeɪs/, /ˈikoʊˌspeɪs/ a potential ecological niche or niches; (also) notional space consisting of such niches, habitats, or ecological roles that may be filled through the adaptation, evolutionary diversification, or migration of existing species.
Brit. /ˈiːkəʊspeɪs/
, /ˈiːkəʊspeɪs//ˈɛkəʊspeɪs/U.S. /ˈɛkoʊˌspeɪs/
, /ˈɛkoʊˌspeɪs//ˈikoʊˌspeɪs/ΚΠ
1969 Trans. Amer. Microsc. Soc. 88 380 All three species in New England can share the same macro-ecospace.]
1972 Biosci. 22 521/3 Expansion and contraction of ecospace are linked to such episodes.
1989 S. J. Gould Wonderful Life (1991) 235 It may be that diversification is simply a reflection of the availability of an almost empty ecospace with low levels of competition permitting the evolution of a wide variety of bodyplans.
2005 Space Daily (Nexis) 22 Nov. The ability to colonize heretofore unavailable ecospace by the invention of new feeding mechanisms and behaviors may have been a key driving force in the striking and continuous Jurassic-Cretaceous dinosaur diversification.
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