Environmentally constrained null models: site suitability as occupancy criterion

Article Abstract:

A null model is presented for assessing the likelihood of species absence or presence at a given site, using environmental constraints as an occupancy criterion. Tests showed this to be a viable model, as it offered a more robust assessment of species occupancy by distinguishing between mutually exclusive conditions and processes of population distribution.

Statistical Data Included, Habitat selection

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Describing and quantifying interspecific interactions: a commentary on recent approaches

Article Abstract:

The author suggests that increased use of short-term, flexible experiments and more extensive research on natural history will help improve methods for measuring levels of interspecific interactions within biological populations. Single numerical approaches are inadequate, as most interactions are nonlinear.

Ecology, Plant populations

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Explaining density-dependent regulation in earthworm populations using life-history analysis

Article Abstract:

The study compares the effects of density on population growth rates of two species of earthworms with different life histories. The findings indicate that both density and behavioral ecology may influence population growth.

Analysis, Genetic aspects, Behavior genetics, Behavioral genetics, Earthworms, Behavioural genetics

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