Answer :
Final answer:
Keystone species have a large impact on their ecosystem while dominant species are the most abundant or have the highest biomass.
Explanation:
Keystone species are species that have a disproportionately large impact on their ecosystem compared to their abundance. They play a critical role in maintaining the structure and function of an ecosystem.
For example, sea otters in kelp forest ecosystems are keystone species as they feed on sea urchins, preventing overgrazing on kelp beds and preserving the health of the ecosystem.
Dominant species, on the other hand, are species that are the most abundant or have the highest biomass in a given ecosystem. They can influence the availability of resources and the behavior of other species in the community.
For example, in a forest ecosystem, dominant species may be large trees that provide shade and affect the distribution of other plants beneath them.
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