overlaps
has component
biome
ecotone
2
There are many subtypes of ecotone, some with sharp transitions and others with gradual, patchy transitions between communities. From Wikipedia:Ecotone - The word ecotone was coined from a combination of eco(logy) plus -tone, from the Greek tonos or tension – in other words, a place where ecologies are in tension.
An envirommental system which bridges two or more biomes and which includes ecological communities which blend these biomes' phylogenetic and phenotypic compositions.
ecosystem