Multiple Choice
What is the likely outcome when a keystone species is removed from an ecosystem?
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48. Ecology
Introduction to Ecology
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What role do lichens and mosses play in primary succession?
A
They are pioneer species that help break down rock into soil.
B
They are decomposers that recycle nutrients back into the ecosystem.
C
They are predators that control herbivore populations.
D
They are climax species that dominate the final stage of succession.
Verified step by step guidance1
Understand the concept of primary succession: Primary succession occurs in lifeless areas where there is no soil, such as after a volcanic eruption or glacier retreat. The first organisms to colonize these areas are known as pioneer species.
Identify the characteristics of pioneer species: Pioneer species are typically hardy organisms that can survive in harsh conditions. They play a crucial role in altering the environment to make it more habitable for other species.
Examine the role of lichens and mosses: Lichens and mosses are often among the first organisms to colonize bare rock. They contribute to soil formation by breaking down the rock through physical and chemical processes.
Consider the ecological impact of lichens and mosses: As lichens and mosses grow, they trap organic material and moisture, gradually creating a thin layer of soil. This process allows other plants to establish, leading to increased biodiversity.
Differentiate between the roles of pioneer species and other ecological roles: Pioneer species like lichens and mosses are distinct from decomposers, predators, and climax species. Their primary function is to initiate the process of succession by transforming the environment.
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