ecotone
noun [ C ] environment specialized uk/ˈiː.kəʊ.təʊn/ us/ˈiː.koʊ.toʊn/
群落交错区，生态过渡带
a region where one type of habitat or natural environment meets another
The ecotone between forest and pasture was overgrown with lantana plants. 森林与牧场之间的交错带长满了马缨丹。
the tropical/subtropical ecotone 热带/亚热带交错带