Widespread occurrence of an emerging pathogen in amphibian communities of the Venezuelan Andes

Sánchez, Dinora; Chacón-Ortiz, Andrés; Leon, F Escobedo-diaz De; Han, Barbara A.; Lampo, Margarita

doi:10.1016/j.biocon.2008.08.009

Cited by 23 publications

(26 citation statements)

References 37 publications

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“…During both years, Bullfrogs had higher naïve prevalence than any other species, a result consistent with other studies (Sanchez et al 2008, Schloegel et al 2010, Spitzen-Van Der Sluijs et al 2014). Occupancy models for 2012 common species reflected the influence of Bullfrogs as all supported models contained 'species' as a covariate (Bullfrog or not), and estimated Bd prevalence was greater for Bullfrogs than for other species.…”

Section: Discussionsupporting

confidence: 92%

“…0.5). 'Species' was used as a covariate when modeling 2012 and 2013 common species and it identified whether or not a sample was from a Bullfrog, a species considered an important Bd carrier because it often has a higher naïve Bd prevalence than other species (Sanchez et al 2008, Schloegel et al 2010, Spitzen-Van Der Sluijs et al 2014. SVL was only used for Spring Peeper models.…”

Section: Statistical Analysesmentioning

confidence: 99%

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Canopy cover and drought influence the landscape epidemiology of an amphibian chytrid fungus

2015

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Abstract. Batrachochytrium dendrobatidis (Bd) is a globally distributed fungal pathogen of amphibians that has caused amphibian population declines. Prevalence and infection intensity of Bd should vary spatially across heterogeneous landscapes because survival of the pathogen depends on environmental conditions including humidity and temperature. Wetland temperatures should vary with forest canopy cover, but few studies have examined the relationship between Bd prevalence and canopy cover. We sampled anurans for Bd at 33 wetlands in Illinois across a canopy cover gradient during the severe drought of 2012 and during more typical weather in 2013. We hypothesized that anurans from closed canopy wetlands would have higher Bd prevalence than anurans from open canopy wetlands because high canopy cover would prevent temperatures from exceeding Bd's critical maximum temperature as often. We used occupancy modeling to examine how Bd prevalence varied spatially in relation to environmental covariates, and to determine if weather conditions altered such relationships. We analyzed all common species combined and Spring Peepers (Pseudacris crucifer) separately. Bd was widespread among the study wetlands. During the drought year of 2012, however, Bd prevalence and infection intensity were substantially reduced. Although wetland temperatures were related negatively to canopy cover, the influence of canopy cover on Bd was complex. Bd prevalence for Spring Peepers was related positively to canopy cover during the drought, but not in the non-drought year. Bd prevalence for all common species was not related positively to canopy cover in either year. Effects of other environmental covariates, such as water depth, also differed between years. Weather conditions had a large impact on Bd infection patterns, which makes predicting pathogen dynamics difficult. In the Midwest region of the United States, climate change models predict more frequent droughts, which may generally inhibit Bd while also altering the effect of environmental factors such as canopy cover on Bd prevalence for amphibians.

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Section: Discussionsupporting

confidence: 92%

Section: Statistical Analysesmentioning

confidence: 99%

Canopy cover and drought influence the landscape epidemiology of an amphibian chytrid fungus

2015

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“…Mannophryne riveroi is considered Endangered by Stuart et al (2008) and . Lampo et al (2006) reported infection with Batrachochytrium dendrobatidis (Bd) in M. cordilleriana and Sánchez et al (2008) found M. collaris also infected with Bd.…”

Section: Discussionmentioning

confidence: 99%

Adição à diversidade de dendrobatídeos da Venezuela: descrição de três novas espécies de Mannophryne (Anura: Dendrobatidae)

Barrio-Amorós

Santos²,

Molina³

2010

Phyllomedusa

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An addition to the diversity of dendrobatid frogs in Venezuela: description of three new collared frogs (Anura: Dendrobatidae: Mannophryne). Three new species of collared frogs of the genus Mannophryne are described from Venezuela. Two are newly discovered taxa from the Venezuelan Andes, whereas the third species, previously confused with M. trinitatis, is from the Caracas area in the Cordillera de la Costa. The call of the three new species and that of Mannophryne collaris are described. Taxonomic, zoogeographic, and conservation issues are discussed.Keywords: Anura, Dendrobatidae, Mannophryne, new species, Colombia, conservation.Resumen Adición a la diversidad de dendrobátidos en Venezuela: descripción de tres nuevas ranas acollaradas (Anura: Dendrobatidae: Mannophryne). Describimos tres nuevas especies de sapitos acollarados del género Mannophryne de Venezuela. Dos corresponden con nuevos descubrimientos y provienen de los Andes venezolanos, mientras que la otra especie es la que desde antiguo se venía confundiendo con M. trinitatis del área de Caracas en la Cordillera de la Costa. Se describen los cantos de las tres nuevas especies y el de Mannophryne collaris. Se discuten temas de taxonomía, zoogeografía, y conservación relacionadas con el género.Palabras clave: Anura, Dendrobatidae, Mannophryne, especies nuevas, Colombia, conservación. 4Phyllomedusa -9(1), July 2010 Resumo Adição à diversidade de dendrobatídeos da Venezuela: descrição de três novas espécies de Mannophryne (Anura: Dendrobatidae). Descrevemos aqui três novas espécies de anuros do gênero Mannophryne da Venezuela. Duas delas correspondem a novas descobertas e são provenientes dos Andes venezuelanos, enquanto a outra vinha sendo confundida há muito tempo com M. trinitatis da região de Caracas, na Cordilheira da Costa. Descrevemos a vocalização das três novas espécies e também a de Mannophryne collaris. Discutimos temas da taxonomia, da zoogeografía e da conservação relacionados ao gênero.

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“…A number of studies have now indicated presence of Bd at lowland sites Frias-Alvarez et al 2008;Kriger and Hero 2008;Sanchez et al 2008). …”

Section: Discussionmentioning

confidence: 99%

Enigmatic Faunal Declines at La Selva, Costa Rica: Patterns and Processes in a Collapsing Neotropical Herpetofauna

Whitfield¹

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Widespread occurrence of an emerging pathogen in amphibian communities of the Venezuelan Andes

Cited by 23 publications

References 37 publications

Canopy cover and drought influence the landscape epidemiology of an amphibian chytrid fungus

Canopy cover and drought influence the landscape epidemiology of an amphibian chytrid fungus

Adição à diversidade de dendrobatídeos da Venezuela: descrição de três novas espécies de Mannophryne (Anura: Dendrobatidae)

Enigmatic Faunal Declines at La Selva, Costa Rica: Patterns and Processes in a Collapsing Neotropical Herpetofauna

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