Original Paper

Biodiversity and Conservation

, Volume 20, Issue 9, pp 1911-1920

Species-level correlates of susceptibility to the pathogenic amphibian fungus Batrachochytrium dendrobatidis in the United States

  • Betsy A. BancroftAffiliated withSchool of Forest Resources, University of WashingtonDepartment of Biology, Southern Utah University Email author 
  • , Barbara A. HanAffiliated withOdum School of Ecology, University of Georgia
  • , Catherine L. SearleAffiliated withDepartment of Zoology, Oregon State University
  • , Lindsay M. BigaAffiliated withDepartment of Zoology, Oregon State University
  • , Deanna H. OlsonAffiliated withUSDA Forest Service, Pacific Northwest Research Station
  • , Lee B. KatsAffiliated withNatural Science Division, Seaver College, Pepperdine University
  • , Joshua J. LawlerAffiliated withSchool of Forest Resources, University of Washington
  • , Andrew R. BlausteinAffiliated withDepartment of Zoology, Oregon State University

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Abstract

Disease is often implicated as a factor in population declines of wildlife and plants. Understanding the characteristics that may predispose a species to infection by a particular pathogen can help direct conservation efforts. Recent declines in amphibian populations world-wide are a major conservation issue and may be caused in part by a fungal pathogen, Batrachochytrium dendrobatidis (Bd). We used Random Forest, a machine learning approach, to identify species-level characteristics that may be related to susceptibility to Bd. Our results suggest that body size at maturity, aspects of egg laying behavior, taxonomic order and family, and reliance on water are good predictors of documented infection for species in the continental United States. These results suggest that, whereas local-scale environmental variables are important to the spread of Bd, species-level characteristics may also influence susceptibility to Bd. The relationships identified in this study suggest future experimental tests, and may target species for conservation efforts.

Keywords

Amphibian Batrachochytrium dendrobatidis Body size Infection Life-history pathogen