title: Epidemic disease decimates amphibian abundance, species diversity, and evolutionary history in the highlands of central Panama.
abstract: Amphibian populations around the world are experiencing unprecedented declines attributed to a chytrid fungal pathogen, Batrachochytrium dendrobatidis. Despite the severity of the crisis, quantitative analyses of the effects of the epidemic on amphibian abundance and diversity have been unavailable as a result of the lack of equivalent data collected before and following disease outbreak. We present a community-level assessment combining long-term field surveys and DNA barcode data describing changes in abundance and evolutionary diversity within the amphibian community of El Copé, Panama, following a disease epidemic and mass-mortality event. The epidemic reduced taxonomic, lineage, and phylogenetic diversity similarly. We discovered that 30 species were lost, including five undescribed species, representing 41% of total amphibian lineage diversity in El Copé. These extirpations represented 33% of the evolutionary history of amphibians within the community, and variation in the degree of population loss and decline among species was random with respect to the community phylogeny. Our approach provides a fast, economical, and informative analysis of loss in a community whether measured by species or phylogenetic diversity.
authors.affiliation: Smithsonian Tropical Research Institute, Apartado 0843-03092, Panamá, Republic of Panama. andrew@dna.ac
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Crawford
authors.forename: Karen R
authors.initials: KR
authors.lastname: Lips
authors.forename: Eldredge
authors.initials: E
authors.lastname: Bermingham
mesh_terms: D000531:Altitude; D000663:Amphibians / Q000145:classification / Q000235:genetics* / Q000382:microbiology*; D000818:Animals; D008411:Chytridiomycota / Q000502:physiology*; D003141:Communicable Diseases / Q000453:epidemiology / Q000662:veterinary*; D056727:Endangered Species; D005828:Genetics, Population; D008969:Molecular Sequence Data; D010176:Panama / Q000453:epidemiology; D010802:Phylogeny