Forest cover influences chytrid infections in populations of Boana curupi, a threatened treefrog of south Brazil

Autor(es)

Delazeri, Francieli ^[1] ; Ernetti, Julia R. ^[2] ; De Bastiani, Veluma I. M. ^[3] ; Lingnau, Rodrigo ^[4] ; Toledo, Luis Felipe ^[2] ; Lucas, Elaine M. ^[5]

Afiliação do(s) autor(es)

^[1] Univ Comunitaria Regiao Chapeco, Programa Posgrad Ciencias Ambientais, BR-89809900 Chapeco, SC - Brazil

^[2] Univ Estadual Campinas, Inst Biol, Dept Biol Anim, Lab Hist Nat Anfibios Brasileiros LaHNAB, BR-13083862 Campinas, SP - Brazil

^[3] Univ Fed Santa Maria, Dept Ecol & Evolucao, Programa Posgrad Biodiversidade Anim, BR-97105900 Santa Maria, RS - Brazil

^[4] Univ Tecnol Fed Parana, Dept Acad Quim & Biol, BR-85601970 Francisco Beltrao, Parana - Brazil

^[5] Univ Fed Santa Maria, Dept Zootecnia & Ciencias Biol, BR-97105900 Palmeira Da Missoes, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: DISEASES OF AQUATIC ORGANISMS; v. 144, p. 133-142, 2021.
• Citações Web of Science: 0

Resumo

Complex interactions among hosts, pathogens, and the environment affect the vulnerability of amphibians to the emergence of infectious diseases such as chytridiomycosis, caused by Batrachochytrium dendrobatidis (Bd). Boana curupi is a forest-dwelling amphibian endemic to the southern Atlantic Forest of South America, a severely fragmented region. Here, we evaluated whether abiotic factors (including air and water temperature, relative air humidity, and landscape) are correlated with chytrid infection intensity and prevalence in B. curupi. We found individuals infected with Bd in all populations sampled. Prevalence ranged from 25-86%, and the infection burden ranged from 1 to over 130 000 zoospore genomic equivalents (g.e.) (mean +/- SD: 4913 +/- 18 081 g.e.). The infection load differed among populations and was influenced by forest cover at scales of 100, 500, and 1000 m, with the highest infection rates recorded in areas with a higher proportion of forest cover. Our results suggest that the fungus is widely distributed in the populations of B. curupi in southern Brazil. Population and disease monitoring are necessary to better understand the relationships between host, pathogen, and environment, especially when, as in the case of B. curupi, threatened species are involved. (AU)

• Processo FAPESP: 20/02994-7 - Variação altitudinal de Batrachochytrium dendrobatidis em anfíbios continentais e insulares
• Beneficiário: Julia Renata Ernetti
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/25358-3 - O fungo quitrídio no Brasil: da sua origem às suas consequências
• Beneficiário: Luis Felipe de Toledo Ramos Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/18335-5 - Transporte aéreo passivo de um patógeno letal para anfíbios em áreas de elevadas: aplicações práticas para conservação de UCs do estado de São Paulo
• Beneficiário: Luis Felipe de Toledo Ramos Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular