ecoregion       
noun [ C ]  environment specialized uk/ˈiː.kəʊˌriː.dʒən/ us/ˈiː.koʊˌriː.dʒən/
 生态区
a region that has a particular type of natural environment and natural features. It is usually defined as smaller than an ecozone.
  The Central Great Plains is the state's largest ecoregion. 中部大平原是这个州最大的生态区。 
 See also: ecozonebioregion
 - More examples
 - According to the World Wide Fund for Nature, the territory of Denmark can be subdivided into two ecoregions: the Atlantic mixed forests and Baltic mixed forests.
 - The Knysna-Amatole montane forests is a subtropical moist broadleaf forest ecoregion of South Africa.
 - Part of a 23-million-acre ecoregion that stretches from Maryland to Vermont, the northern Taconics roughly separate Vermont from New York.
 - He is director for nature conservancy of the northern tallgrass prairie ecoregion.