A century of Batrachochytrium dendrobatidis in Illinois amphibians (1888–1989)

Talley, Brooke L.; Muletz, Carly R.; Vredenburg, Vance T.; Fleischer, Robert C.; Lips, Karen R.

doi:10.1016/j.biocon.2014.12.007

Cited by 89 publications

(81 citation statements)

References 36 publications

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“…Other field studies have also found interannual variation in Bd prevalence in both temperate and tropical habitats (Eastern Australia, Berger et al 2004, Kriger andPanam a, Voyles et al 2018;USA, Souza et al 2012, Talley et al 2015 though most previous work has focused on characterizing seasonal variation within a sampling year. Our study-wide annual Bd prevalence estimate increased approximately 10-fold between 2012 and 2015.…”

Section: Discussionmentioning

confidence: 98%

Effects of latitudinal, seasonal, and daily temperature variations on chytrid fungal infections in a North American frog

2019

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Section: Discussionmentioning

confidence: 98%

Effects of latitudinal, seasonal, and daily temperature variations on chytrid fungal infections in a North American frog

2019

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“…Several studies have used retrospective surveys to describe Bd pathogen dynamics in many regions (Weldon et al , Ouellet et al , Soto‐Azat et al , Cheng et al , Vredenburg et al , Rodriguez et al , Courtois et al , Talley et al ). Here, we used quantitative PCR to detect Bd on preserved anurans collected over a 119 yr period.…”

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confidence: 99%

Historical dynamics of Batrachochytrium dendrobatidis in Amazonia

et al. 2015

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The Amazon forest is known for its astonishing amphibian diversity, yet the potential distribution and underlying impacts of the most important amphibian pathogen is unknown for most of Amazonia. In this retrospective survey of preserved Leptodactylus frogs, collected over a 119 yr period, we used quantitative PCR to detect the fungal pathogen Batrachochytrium dendrobatidis (Bd) and performed spatial scan analyses to identify spatiotemporal clusters of Bd. We also quantified the potential effect of environmental factors on the likelihood of Bd occurrence and generated an updated suitability map for Bd in the Amazon that included our retrospective sampling. We detected Bd in lowland Amazon as early as 1935, in the state of Pará, Brazil, and we found low prevalence (∼ 3.8%) over time. We identified two statistically significant spatiotemporal clusters of Bd: a recent and narrow cluster in the Amazon River delta and a spatiotemporally broad cluster in the southern edge of Amazon and Brazilian savanna. Furthermore, we found an increase in Bd‐positive samples in the southwestern Amazon after the 1990s, coinciding with reported amphibian declines in neighboring high elevation sites on Andean slopes of Peru. Spatial regressions indicated that higher human interference, higher precipitation, and lower temperatures were significant predictors of Bd occurrence. Environmental niche modeling predicted some narrow areas of suitable climates along the Amazon's periphery and generally low climatic suitability for Bd in the central Amazon; although, we found clusters of Bd‐positive samples with unexpectedly high infection loads in areas of predicted low suitability. Our study indicates that accelerated human development may put Amazonian amphibians at risk from Bd introductions, and it highlights the potential need to monitor Bd dynamics near Amazonian port cities.

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“…Retrospective sampling of museum specimens has been widely used to determine historical dynamics of Bd across space and time (Weldon et al 2004, Ouellet et al 2005, Soto-Azat et al 2010, Cheng et al 2011, Rodriguez et al 2014, Courtois et al 2015, Talley et al 2015, Becker et al 2016. We swabbed individual specimens on the head, anal disc, and dorsal and ventral surfaces with a single swab per individual, following Rendle et al (2015), and stored each sample in a 1.5 ml dry sterile tube.…”

Section: Bd Detectionmentioning

confidence: 99%

Spatial distribution of Batrachochytrium dendrobatidis in South American caecilians

Lambertini

Becker²,

Bardier³

et al. 2017

Dis. Aquat. Org.

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The amphibian-killing fungus Batrachochytrium dendrobatidis (Bd) is linked to population declines in anurans and salamanders globally. To date, however, few studies have attempted to screen Bd in live caecilians; Bd-positive caecilians have only been reported in Africa and French Guiana. Here, we performed a retrospective survey of museum preserved specimens to (1) describe spatial patterns of Bd infection in Gymnophiona across South America and (2) test whether areas of low climatic suitability for Bd in anurans predict Bd spatial epidemiology in caecilians. We used quantitative PCR to detect Bd in preserved caecilians collected over a 109 yr period, and performed autologistic regressions to test the effect of bioclimatic metrics of temperature and precipitation, vegetation density, and elevation on the likelihood of Bd occurrence. We detected an overall Bd prevalence of 12.4%, with positive samples spanning the Uruguayan savanna, Brazil's Atlantic Forest, and the Amazon basin. Our autologistic models detected a strong effect of macroclimate, a weaker effect of vegetation density, and no effect of elevation on the likelihood of Bd occurrence. Although most of our Bd-positive records overlapped with reported areas of high climatic suitability for the fungus in the Neotropics, many of our new Bd-positive samples extend far into areas of poor suitability for Bd in anurans. Our results highlight an important gap in the study of amphibian chytridiomycosis: the potential negative impact of Bd on Neotropical caecilians and the hypothetical role of caecilians as Bd reservoirs.

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A century of Batrachochytrium dendrobatidis in Illinois amphibians (1888–1989)

Cited by 89 publications

References 36 publications

Effects of latitudinal, seasonal, and daily temperature variations on chytrid fungal infections in a North American frog

Effects of latitudinal, seasonal, and daily temperature variations on chytrid fungal infections in a North American frog

Historical dynamics of Batrachochytrium dendrobatidis in Amazonia

Spatial distribution of Batrachochytrium dendrobatidis in South American caecilians

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