An intertidal species of seastar helps to maintain the diversity of the intertidal region by controlling the mussel population. a.Without the seastar, the mussel population would crowd out other species and take over their territory.
The seastar could be called a(n)

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The seastar is a keystone species because it plays a crucial role in maintaining the diversity of the intertidal region by controlling the mussel population. Without the seastar, the mussel population would increase and dominate the area, which would lead to a loss of diversity as other species are crowded out. As a keystone species, the seastar helps to maintain the balance of the intertidal ecosystem, and its presence is critical to the survival of many other species.

An Intertidal Species of Seastar Helps to Maintain the Diversity