Question

beavers are considered keystone species because they: eat fish in ponds build dams that create wetlands and new habitats always live in groups migrate long distances which statement is true about keystone species? they are always the largest animals in the ecosystem their impact is greater than their abundance suggests they only exist in forest ecosystems they prevent any changes in an ecosystem

Explanation:

Beavers build dams which transform the landscape, creating wetlands and new habitats that support a wide - variety of other species, making them keystone species. Keystone species have a disproportionately large impact on their ecosystem relative to their abundance. They are not always the largest animals, don't only exist in forest ecosystems, and can't prevent all changes in an ecosystem.

Answer:

1. Build dams that create wetlands and new habitats
2. Their impact is greater than their abundance suggests