| Autor: |
Morgan, Jess A. T., Vredenburg, Vance T., Rachowicz, Lara J., Knapp, Roland A., Stice, Mary J., Tunstall, Tate, Bingham, Rob E., Parker, John M., Longcore, Joyce E., Moritz, Craig, Briggs, Cheryl J., Taylor, John W. |
| Předmět: |
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| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 8/21/2007, Vol. 104 Issue 34, p13845-13850, 6p, 2 Diagrams, 3 Charts |
| Abstrakt: |
Global amphibian decline by chytridiomycosis is a major environmental disaster that has been attributed to either recent fungal spread or environmental change that promotes disease. Here, we present a population genetic comparison of Batrachochytrium dendrobatidis isolates from an intensively studied region of frog decline, the Sierra Nevada of California. In support of a novel pathogen, we find low diversity, no amphibian-host specificity, little correlation between fungal genotype and geography, local frog extirpation by a single fungal genotype, and evidence of human-assisted fungus migration. In support of endemism, at a local scale, we find some diverse, recombining populations. Therefore neither epidemic spread nor endemism alone explains this particular amphibian decline. Recombination raises the possibility of resistant sporangia and a mechanism for rapid spread as well as persistence that could greatly complicate global control of the pathogen. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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