This is an ecological concept that
describes how there is a greater diversity of life in the region where
the edges two adjacent ecosystems overlap, such as land/water
2.An ecotone is the transition zone along the edges of two adjacent ecological communities, where one ecological communities meets the other.An edge is the boundary or interface between two biological communities.
In summary when two edges of different ecosystems meet and ovelap they form ecotone e.g.where estuaries meet the ocean,river touches land .