ecoregions

/IY1 K AO0 R IY1 JH AH0 N Z/
noun
  1. 1

    A region, smaller than an ecozone, that contains a distinct biodiversity of flora and fauna.

Source: https://en.wiktionary.org/wiki/eco-region, https://en.wiktionary.org/wiki/ecoregion, https://en.wiktionary.org/wiki/ecoregions