2024-03-28T09:52:06Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1587682022-07-07T08:57:38Zcom_10261_77com_10261_8col_10261_330
2018-01-03T10:26:47Z
urn:hdl:10261/158768
Impact of asynchronous emergence of two lethal pathogens on amphibian assemblages
Rosa, Gonçalo M.
Sabino-Pinto, Joana
Laurentino, Telma G.
Martel, An
Pasmans, Frank
Rebelo, Rui
Griffiths, Richard A.
Stöhr, Anke C.
Marschang, Rachel E.
Price, Stephen J.
Garner, Trenton W. J.
Bosch, Jaime
Ministerio de Economía y Competitividad (España)
Emerging diseases have been increasingly associated with population declines, with co-infections exhibiting many types of interactions. The chytrid fungus (Batrachochytrium dendrobatidis) and ranaviruses have extraordinarily broad host ranges, however co-infection dynamics have been largely overlooked. We investigated the pattern of co-occurrence of these two pathogens in an amphibian assemblage in Serra da Estrela (Portugal). The detection of chytridiomycosis in Portugal was linked to population declines of midwife-toads (Alytes obstetricans). The asynchronous and subsequent emergence of a second pathogen - ranavirus - caused episodes of lethal ranavirosis. Chytrid effects were limited to high altitudes and a single host, while ranavirus was highly pathogenic across multiple hosts, life-stages and altitudinal range. This new strain (Portuguese newt and toad ranavirus - member of the CMTV clade) caused annual mass die-offs, similar in host range and rapidity of declines to other locations in Iberia affected by CMTV-like ranaviruses. However, ranavirus was not always associated with disease, mortality and declines, contrasting with previous reports on Iberian CMTV-like ranavirosis. We found little evidence that pre-existing chytrid emergence was associated with ranavirus and the emergence of ranavirosis. Despite the lack of cumulative or amplified effects, ranavirus drove declines of host assemblages and changed host community composition and structure, posing a grave threat to all amphibian populations.
2018-01-03T10:26:47Z
2018-01-03T10:26:47Z
2017-02-27
2018-01-03T10:26:47Z
artículo
Scientific Reports 7: 43260 (2017)
http://hdl.handle.net/10261/158768
10.1038/srep43260
http://dx.doi.org/10.13039/501100003329
28240267
eng
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2015-70070-R
http://creativecommons.org/licenses/by/4.0/
openAccess
Nature Publishing Group