ecotonal       
adjective  environment specialized uk/ˈiː.kəʊ.təʊ.nəl/ us/ˈiː.koʊ.toʊ.nəl/
 群落交错区的,生态过渡带的
relating to an area where one type of natural environment meets another
  the ecotonal area between the mangrove-coastal marsh and the inland marsh 红树林-海岸沼泽和内陆沼泽之间的群落交错区 
 See: ecotone
 - More examples
 - Wetlands have been generally considered ecotonal communities.
 - This species is not confined to the shallow parts of the ecotonal zone.
 - Ecotonal areas are the transition zones between ecological systems where native plant diversity is often greatest.