Answer :
A species that plays a vital role in defining an ecosystem is known as a keystone species.Without its keystone species, a ecosystem would either no longer exist or would change significantly.
What kind of animal has the biggest impact on an ecosystem?
a species that significantly affects the types and numbers of other species in an ecosystem. A keystone species is one that has an outsized impact on its habitat compared to its abundance.
How many species are there in an ecosystem, and where are they located?
In ecological systems, the whole distribution of rarity and commonness is described by the species abundance distribution (SAD).It has a stable shape with several rare species and few abundant species coexisting in a community, making it one of the most fundamental and pervasive patterns in ecology.
To know more species in an ecosystem visit:
https://brainly.com/question/14244070
#SPJ4