Consequences of prairie wetland drainage for crustacean biodiversity and metapopulations

Article Abstract:

The Crustacean communities are studied for 3 years in a set of extant ephemeral wetlands in Illinois to examine the effects of habitat fragmentation on the genetic structure of extant crustacean metapopulations. It is concluded that the conversion of former wet prairie to agriculture may have reduced the metapopulations and that the conservation programs can preserve much of the historical biodiversity of ephemeral wetlands.

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Sample size for the diagnosis of conservation units

Article Abstract:

Diagnosis of conservation units is usually based on the character states of a small sample of individuals and not the entire population. A method describing the effect of uncertainty in estimating population size while calculating critical sample size is given. The phylogenetic species concept requires a much larger sample size.

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What it will take to monitor forest elephant populations

Article Abstract:

Issues discussed concern the impact of a limited sale of ivory on elephant populations in Africa, and techniques for monitoring forest elephant populations. Topics addressed include the elephant populations of central Africa, field survey techniques, and quantifying poaching levels.

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