Multiple Choice
In the process of primary succession, which of the following is initially absent from the environment?
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48. Ecology
Introduction to Ecology
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In the context of ecology, what is a keystone organism?
A
An organism that is the primary producer in its ecosystem
B
An organism that is the most abundant in its ecosystem
C
An organism that has a disproportionately large impact on its environment relative to its abundance
D
An organism that is at the top of the food chain
Verified step by step guidance1
Begin by understanding the concept of a keystone organism in ecology. A keystone organism is one that plays a critical role in maintaining the structure of an ecological community, affecting many other organisms in the ecosystem.
Recognize that the impact of a keystone organism is disproportionately large compared to its abundance. This means that even if the organism is not the most abundant, its presence or absence can significantly alter the ecosystem.
Differentiate between keystone organisms and other types of organisms in an ecosystem, such as primary producers, which are organisms that produce energy available to other organisms, or apex predators, which are at the top of the food chain.
Consider examples of keystone organisms, such as sea otters in kelp forest ecosystems, which control sea urchin populations and thus maintain the health of the kelp forests.
Reflect on the importance of keystone organisms in conservation efforts, as protecting these species can help preserve the entire ecosystem due to their significant ecological roles.
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