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Multiple Choice
Which of the following is NOT a consequence of fragmentation on grassland habitats?
A
Reduced movement of species between habitat patches
B
Greater edge effects leading to altered microclimates
C
Decreased population sizes of specialist species
D
Increased genetic diversity within isolated populations
Verified step by step guidance
1
Understand the concept of habitat fragmentation: Habitat fragmentation occurs when large, continuous habitats are divided into smaller, isolated patches due to human activities or natural events. This can lead to various ecological consequences.
Analyze the listed consequences of fragmentation: Reduced movement of species between habitat patches, greater edge effects leading to altered microclimates, and decreased population sizes of specialist species are all well-documented effects of fragmentation.
Consider the impact of isolation on genetic diversity: Fragmentation typically reduces genetic diversity within isolated populations because smaller populations are more prone to genetic drift and inbreeding, which limits genetic variation.
Compare the options to identify the incorrect consequence: Increased genetic diversity within isolated populations contradicts the typical effects of fragmentation, as isolation generally reduces genetic diversity rather than increasing it.
Conclude that the correct answer is the option that does not align with the known consequences of fragmentation: 'Increased genetic diversity within isolated populations' is NOT a consequence of fragmentation on grassland habitats.