Are Keystone species always predators?

Can virtually all species be considered a keystone species?

  • someone asked me if every species can be considered a keystone species (a species that has a disproportionate effect on the environment relative to its abundance) due to community ...show more

  • Answer:

    No. Removal of lions would allow other predators to expand their populations. They are not a keystone species. BTW, I believe that the savannah is kept from becoming forest by the low rainfall, not by browsing by elephants, giraffes, and other herbivores. Also, there are no deer in Africa; that niche is filled by antelope, mostly.

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