ECOLOGY
BIODIVERSITY AND ITS CONSERVATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I only
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II only
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II and III
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I and II
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Detailed explanation-1: -The theory of island biogeography outlines three factors that impact species diversity on an island. These are extinction, immigration, and emigration.
Detailed explanation-2: -Island biogeography is determined by three processes: immigration, evolution, and extinction. These processes are determined by the area and isolation of islands such that smaller and more isolated islands have lower numbers of species than larger and less isolated islands.
Detailed explanation-3: -The availability of resources, such as food, water, and shelter, is an evolutionary factor that influences species richness in a community. Climate, natural disasters, and competition between species can also play a role in determining species richness.
Detailed explanation-4: -Species richness increases in response to increasing tide range, increasing wave energy, decreasing sand particle size and in flatter and wider beaches. This means that macrofaunal species richness increases as beaches become more dissipative (McLachlan and Dorvlo, 2005).