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Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?

The fungal pathogen Batrachochytrium dendrobatidis (Bd), which causes the disease chytridiomycosis, has been linked to catastrophic amphibian declines throughout the world. Amphibians differ in their vulnerability to chytridiomycosis; some species experience epizootics followed by collapse while oth...

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Autores principales: Catenazzi, Alessandro, Swei, Andrea, Finkle, Jacob, Foreyt, Emily, Wyman, Lauren, Vredenburg, Vance T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5645123/
https://www.ncbi.nlm.nih.gov/pubmed/29040327
http://dx.doi.org/10.1371/journal.pone.0186478
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author Catenazzi, Alessandro
Swei, Andrea
Finkle, Jacob
Foreyt, Emily
Wyman, Lauren
Vredenburg, Vance T.
author_facet Catenazzi, Alessandro
Swei, Andrea
Finkle, Jacob
Foreyt, Emily
Wyman, Lauren
Vredenburg, Vance T.
author_sort Catenazzi, Alessandro
collection PubMed
description The fungal pathogen Batrachochytrium dendrobatidis (Bd), which causes the disease chytridiomycosis, has been linked to catastrophic amphibian declines throughout the world. Amphibians differ in their vulnerability to chytridiomycosis; some species experience epizootics followed by collapse while others exhibit stable host/pathogen dynamics where most amphibian hosts survive in the presence of Bd (e.g., in the enzootic state). Little is known about the factors that drive the transition between the two disease states within a community, or whether populations of species that survived the initial epizootic are stable, yet this information is essential for conservation and theory. Our study focuses on a diverse Peruvian amphibian community that experienced a Bd-caused collapse. We explore host/Bd dynamics of eight surviving species a decade after the mass extinction by using population level disease metrics and Bd-susceptibility trials. We found that three of the eight species continue to be susceptible to Bd, and that their populations are declining. Only one species is growing in numbers and it was non-susceptible in our trials. Our study suggests that some species remain vulnerable to Bd and exhibit ongoing population declines in enzootic systems where Bd-host dynamics are assumed to be stable.
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spelling pubmed-56451232017-10-30 Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible? Catenazzi, Alessandro Swei, Andrea Finkle, Jacob Foreyt, Emily Wyman, Lauren Vredenburg, Vance T. PLoS One Research Article The fungal pathogen Batrachochytrium dendrobatidis (Bd), which causes the disease chytridiomycosis, has been linked to catastrophic amphibian declines throughout the world. Amphibians differ in their vulnerability to chytridiomycosis; some species experience epizootics followed by collapse while others exhibit stable host/pathogen dynamics where most amphibian hosts survive in the presence of Bd (e.g., in the enzootic state). Little is known about the factors that drive the transition between the two disease states within a community, or whether populations of species that survived the initial epizootic are stable, yet this information is essential for conservation and theory. Our study focuses on a diverse Peruvian amphibian community that experienced a Bd-caused collapse. We explore host/Bd dynamics of eight surviving species a decade after the mass extinction by using population level disease metrics and Bd-susceptibility trials. We found that three of the eight species continue to be susceptible to Bd, and that their populations are declining. Only one species is growing in numbers and it was non-susceptible in our trials. Our study suggests that some species remain vulnerable to Bd and exhibit ongoing population declines in enzootic systems where Bd-host dynamics are assumed to be stable. Public Library of Science 2017-10-17 /pmc/articles/PMC5645123/ /pubmed/29040327 http://dx.doi.org/10.1371/journal.pone.0186478 Text en © 2017 Catenazzi et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Catenazzi, Alessandro
Swei, Andrea
Finkle, Jacob
Foreyt, Emily
Wyman, Lauren
Vredenburg, Vance T.
Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?
title Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?
title_full Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?
title_fullStr Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?
title_full_unstemmed Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?
title_short Epizootic to enzootic transition of a fungal disease in tropical Andean frogs: Are surviving species still susceptible?
title_sort epizootic to enzootic transition of a fungal disease in tropical andean frogs: are surviving species still susceptible?
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5645123/
https://www.ncbi.nlm.nih.gov/pubmed/29040327
http://dx.doi.org/10.1371/journal.pone.0186478
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