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Título:
Research seminar: ENVIRONMENTAL REFUGE FROM DISEASE-DRIVEN AMPHIBIAN EXTINCTIONS
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Idioma:
Inglés
Duración:
38 min.
Signatura:
VI05965
Fecha de producción:
20/06/2013
Nivel:
Estudios universitarios
Resumen:
Chytridriomycosis, caused by the fungus Batrachochytrium dendrobatidis (Bd), has been linked to extirpations and extinctions of amphibian species across the globe. The pathogen thrives in cool, moist environments, and high mortality rates have commonly occurred during outbreaks in amphibian populations in high-elevation tropical rainforests. In Australia several high-elevation species, including two out of the five torrent frog species (Litoria lorica, Litoria nyakalensis), were believed to have gone extinct during chytridiomycosis outbreaks in the 1980s and early 1990s.
Here present data on the unknown status of peripheral populations of torrent frogs in high elevation-dry forest and compare their abundance and disease status to the adjacent rainforest sites where amphibian populations have suffered well documented declines and even extirpations due to chytridiomycosis. Litoria nannotis in the dry habitat had significantly higher pathogen prevalence than those in the wet habitat, but were five times more abundant. I also discovered a previously unknown population of L. lorica and a population of the waterfall frog (L. nannotis) further downstream, both present at high abundance and with high prevalences of Bd infection. No individuals of either species showed clinical signs of disease, and they remained abundant during surveys over the following 4 years. I present a new hypothesis for how amphibians and this otherwise lethal pathogen can coexist, and discuss the conservation implications of our findings.
Colección:
Museo Nacional de Ciencias Naturales, CSIC
País de producción:
España
Ficha técnica:
Producción y edición: Mediateca MNCN-CSIC. Presentación: Ignacio de la Riva, Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC. Ponente: Robert Puschendorf, Universidad de Plymouth, UK
Observaciones:
Seminario organizado por el Departamento de Biodiversidad y Biología Evolutiva del Museo Nacional de Ciencias Naturales (MNCN), CSIC, y retransmitido a través de Cienciatk.
Productora:
Museo Nacional de Ciencias Naturales (MNCN)
C/ José Gutiérrez Abascal, 2 28006 Madrid Tlno: 91 411 13 28 Fax: 91 564 50 78 http://www.mncn.csic.es
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