Indicator taxa, rapid biodiversity assessment, and nestedness in an endangered ecosystem

Article Abstract:

An assessment is presented on the use of Lepidoptera and Hymenoptera as indicator species, using as examples oak savannas in southern Ontario which are highly fragmented. Hymenoptera morphospecies were significantly correlated with species richness scores, while both Lepidoptera and Hymenoptera exhibited high levels of nestedness, indicating local extinctions are important richness determinants.

Ontario, Statistical Data Included, Usage, Endangered species, Habitat partitioning (Biology), Habitat partitioning (Ecology), Lepidoptera, Hymenoptera, Indicators (Biology), Biological indicators

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Critical biodiversity

Article Abstract:

Research indicates that ecosystems naturally establish ordered states rather than develop chaotic processes leading to mass extinction. Using a computer model to evaluate the dynamic vector for environmental niches, studies showed that natural selection creates a complex and interactive but intrinsically stable state in which global perturbations are needed to cause extinction.

United States, Extinction (Biology)

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Conservation Genetics of Potentially Endangered Mutualisms: Reduced Levels of Genetic Variation in Specialist versus Generalist Bees

Article Abstract:

Findings show that oligolectic bees may face greater risk of extinction due to the interrelationship between reduced effective population size and their limited range of host plants.

Canada, Chile, Insect-plant relationships, Bees, Insect populations

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