| Autor: |
Williams YM; School of Marine and Tropical Biology, James Cook University, Townsville 4811, Australia. yvette.williams@jcu.edu.au, Williams SE, Alford RA, Waycott M, Johnson CN |
| Jazyk: |
angličtina |
| Zdroj: |
Biology letters [Biol Lett] 2006 Dec 22; Vol. 2 (4), pp. 532-5. |
| DOI: |
10.1098/rsbl.2006.0541 |
| Abstrakt: |
We investigated the relationship between diet specialization and geographical range in Cophixalus, a genus of microhylid frogs from the Wet Tropics of northern Queensland, Australia. The geographical ranges of these species vary from a few square kilometres in species restricted to a single mountain top to the entire region for the widespread species. Although macroecological theory predicts that species with broad niches should have the largest geographical ranges, we found the opposite: geographically rare species were diet generalists and widespread species were diet specialists. We argue that this pattern is a product of extinction filtering, whereby geographically rare and therefore extinction-prone species are more likely to persist if they are diet generalists. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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