Data for: Epidemiological landscape of Batrachochytrium dendrobatidis and its impact on amphibian diversity at global scale

Chytridiomycosis, caused by the fungal pathogen Batrachochytrium dendrobatidis (Bd), is a major driver of amphibian decline worldwide. The global presence of Bd is driven by a synergy of factors, such as climate, species life history, and amphibian host suscep­tibility. Here, using a Bayesian data-mining approach, we modeled the epidemiologi­cal landscape of Bd to evaluate how infection varies across several spatial, ecological, and phylogenetic scales. We compiled global information on Bd occurrence, climate, species ranges, and phylogenetic diversity to infer the potential distribution and preva­lence of Bd. By calculating the degree of co-distribution between Bd and our set of environmental and biological variables (e.g. climate and species), we identified the factors that could potentially be related to Bd presence and prevalence using a geo­graphic correlation metric, epsilon (ε). We fitted five ecological models based on 1) amphibian species identity, 2) phylogenetic species variability values for a given species assemblage, 3) temperature, 4) precipitation and 5) all variables together. Our results extend the findings of previous studies by identifying the epidemiological landscape features of Bd. This ecological modeling framework allowed us to generate explicit spatial predictions for Bd prevalence at the global scale and a ranked list of species with high/low probability of Bd presence. Our geographic model identified areas with high potential for Bd prevalence (potential Bd-risk areas) and areas with low potential Bd prevalence as potential refuges (free Bd). At the amphibian assemblage level, we found a non-relationship with amphibian phylogenetic signals, but a significantly negative correlation between observed species richness and Bd prevalence indicated a potential dilution effect at the landscape scale. Our model may identify species and areas potentially susceptible and at risk for Bd presence, which could be used to prioritize regions for amphibian conservation efforts and to assess species and assemblage at risk.

Methods
Usage notes

These datasets include the geographic data used to build ecological and geographical models for Batrachochytrium dendrobatidis, as well as supplementary results of the following paper: Basanta et al. Epidemiological landscape of Batrachochytrium dendrobatidis and its impact on amphibian diversity at the global scale.

Missing values are denoted by NA. Details for each dataset are provided in the README file.

Datasets included:

Information of Bd records.
Table S1.xls contains *Bd* occurrence records and prevalence of infection from the Bd-Maps online database (http://www.bd-maps.net), Olson et al. 2013) accessed in 2013, and searched Google Scholar for recent papers with *Bd* infection reports using the keywords ‘*Batrachochytrium dendrobatidis’*. We excluded records from studies of captive individuals and those without coordinates, keeping only records in which coordinates reflected site-specific sample locations.

Supplementary figures
Supplementary information S1.docx contains supplementary figures of results obtained in this study. Description of methods and figures interpretation are in the Method and Results sections of the manuscript.

Ecological traits of global amphibians and score-trait values.
Table S2.xlsx contains information of amphibians' ecological traits obtained from AmphiBIO (Oliveira et al., 2017), as well as Score-trait values for each species. Methods for calculating Score-trait values are described in the section Methods of the manuscript.

Values of ε (C|X) and S(C|X) of each Bd-variable pair combination.
Table S3.xlsx contains epsilon and score values obtained by each pair combination of Bd and temperature, precipitation, phylogenetic and amphibian species. Methods for calculating epsilon and score values are described in the section Methods of the manuscript.

List of new species confirmed positives for Bd (Olson et al. 2021).
Table S4.xlsx contains a list of species recently confirmed positives for *Bd* (Olson et al. 2021) as well as score values and score quantiles.