Population genetics of the frog-killing fungus Batrachochytrium dendrobatidis
| Autor: | John W. Taylor, Vance T. Vredenburg, John M. Parker, Robert E. Bingham, Jess A. T. Morgan, Cheryl J. Briggs, Craig Moritz, Lara J. Rachowicz, Mary J. Stice, Joyce E. Longcore, Roland A. Knapp, Tate S. Tunstall |
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| Rok vydání: | 2007 |
| Předmět: |
Male
Amphibian Genotype Molecular Sequence Data Population Zoology Population genetics California biology.animal Animals Chytridiomycosis Endemism education Chytridiomycota education.field_of_study Multidisciplinary biology Ecology Biological Sciences biology.organism_classification Genetics Population Mycoses Emerging infectious disease Female Anura |
| Zdroj: | Proceedings of the National Academy of Sciences. 104:13845-13850 |
| ISSN: | 1091-6490 0027-8424 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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