If there is higher species diversity in a community when Species X is present than when it has been removed, you might consider Species X to be a(n)Multiple choice question.parasitic species.pioneer species.introduced species.keystone species.
Question
If there is higher species diversity in a community when Species X is present than when it has been removed, you might consider Species X to be a(n)Multiple choice question.parasitic species.pioneer species.introduced species.keystone species.
Solution
The correct answer is "keystone species." A keystone species is one that has a disproportionately large effect on its environment relative to its abundance. Such species are often instrumental in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community. If a keystone species is removed or reduced, the community would likely be significantly different or cease to exist altogether. Therefore, if there is higher species diversity in a community when Species X is present than when it has been removed, Species X could be considered a keystone species.
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