What is ecosystem diversity?
The variety of different ecosystems within an area.
Ecosystem diversity is the the variety of different ecosystems within an area. It is not the diversity of species within an ecosystem. It is sometimes confused with ecological diversity which is the number of species within a community.
An area with four different ecosystems (say boreal, tundra, temperate grasslands, and temperate forests) has greater ecosystem diversity than the same size area with only two ecosystems (say temperate grasslands and forests).