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colleen colleen
wrote...
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Posts: 17077
12 years ago
Suppose you are a biologist working for an international conservation organization concerned with studying and conserving biological diversity. On one of your assignments you are sent out to explore the local biotas of several regions. As part of your survey work you are to take large quantitative samples of the copepods of the North Atlantic, the butterflies of central New Guinea, and the ground-dwelling beetles of southwest Africa. Using the lognormal distribution, predict the patterns of relative abundance of species you expect to see within each of these groups of organisms.
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12 years ago
Regardless of the particular type of organisms, the lognormal distribution appears to represent the relative abundance of species within taxonomic groups: most species are moderately abundant; few are very abundant or extremely rare.
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