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      A Comparative Analysis of Specialization and Extinction Risk in Temperate-Zone Bats

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      Conservation Biology

      Wiley-Blackwell

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          Ecological Correlates of Extinction Proneness in Australian Tropical Rain Forest Mammals

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            A review of the abundance and diversity of invertebrate and plant foods of granivorous birds in northern Europe in relation to agricultural change

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              Biological correlates of extinction risk in bats.

              We investigated patterns and processes of extinction and threat in bats using a multivariate phylogenetic comparative approach. Of nearly 1,000 species worldwide, 239 are considered threatened by the International Union for Conservation of Nature and Natural Resources (IUCN) and 12 are extinct. Small geographic ranges and low wing aspect ratios are independently found to predict extinction risk in bats, which explains 48% of the total variance in IUCN assessments of threat. The pattern and correlates of extinction risk in the two bat suborders are significantly different. A higher proportion (4%) of megachiropteran species have gone extinct in the last 500 years than microchiropteran bats (0.3%), and a higher proportion is currently at risk of extinction (Megachiroptera: 34%; Microchiroptera: 22%). While correlates of microchiropteran extinction risk are the same as in the order as a whole, megachiropteran extinction is correlated more with reproductive rate and less with wing morphology. Bat extinction risk is not randomly distributed phylogenetically: closely related species have more similar levels of threat than would be expected if extinction risk were random. Given the unbalanced nature of the evolutionary diversification of bats, it is probable that the amount of phylogenetic diversity lost if currently threatened taxa disappear may be greater than in other clades with numerically more threatened species.
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                Author and article information

                Journal
                Conservation Biology
                Conservation Biology
                Wiley-Blackwell
                0888-8892
                1523-1739
                October 2004
                October 2004
                : 18
                : 5
                : 1293-1303
                Article
                10.1111/j.1523-1739.2004.00155.x
                © 2004

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