Changing times, changing teams

Article Abstract:

The FAUNMAP software package provides information about mammals found in 2,945 regions of the US over the past 20,000 years. FAUNMAP allows measurement of association between species and spatial heterogeneity. The changes in the range of species with climatic changes can be mapped. Studies show uncoordinated migration of species in response to climatic changes. This suggests that alliances are formed between species rather than associations. The fauna shows a distinct eastern and western demarcation. Spatial heterogeneity was most likely greater during Pleistocene than the modern age.

United States, Usage, History, Natural history, FAUNMAP (Educational/training software)

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The objective case for conservation

Article Abstract:

Policies designed to conserve biodiversity are made more effective if biodiversity is defined as a working system rather than as a list of endangered species. This definition allows conservationists to argue that saving as much of the system as is possible will maintain flexibility in nature while ensuring future opportunities for the scientific or commercial use of diverse species. The alternative argument, which holds that individual species should be preserved strictly on account of their potential usefulness, overlooks the need to stress the integrity of the system as a whole.

Analysis, Evaluation, Wildlife conservation, Biological diversity conservation, Biodiversity conservation

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By their teeth ye shall know them

Article Abstract:

The debate over whether to classify Chronoperates paradoxus as a therapsid illustrates a lapse of logic in the application of transformation series. Phylogenies can only be reconstructed based on contemporary species, with fossils fit in after the fact. The discovery of phylogenic features in the fossil record is susceptible to the biases of those who would reconstruct a priori lineages.

Methods, Evolution (Biology), Phylogeny

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