Microclimate limits thermal behaviour favourable to disease control in a nocturnal amphibian.
Batrachochytrium salamandrivorans
chytridiomycosis
disease ecology
environmental context
host response
salamander
thermal ecology
thermoregulation
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Jan 2021
Jan 2021
Historique:
received:
03
06
2020
revised:
15
07
2020
accepted:
07
09
2020
pubmed:
7
10
2020
medline:
16
12
2020
entrez:
6
10
2020
Statut:
ppublish
Résumé
While epizootics increasingly affect wildlife, it remains poorly understood how the environment shapes most host-pathogen systems. Here, we employ a three-step framework to study microclimate influence on ectotherm host thermal behaviour, focusing on amphibian chytridiomycosis in fire salamanders (Salamandra salamandra) infected with the fungal pathogen Batrachochytrium salamandrivorans (Bsal). Laboratory trials reveal that innate variation in thermal preference, rather than behavioural fever, can inhibit infection and facilitate salamander recovery under humidity-saturated conditions. Yet, a 3-year field study and a mesocosm experiment close to the invasive Bsal range show that microclimate constraints suppress host thermal behaviour favourable to disease control. A final mechanistic model, that estimates range-wide, year-round host body temperature relative to microclimate, suggests that these constraints are rule rather than exception. Our results demonstrate how innate host defences against epizootics may remain constrained in the wild, which predisposes to range-wide disease outbreaks and population declines.
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
27-37Subventions
Organisme : Fonds Wetenschappelijk Onderzoek
ID : 11ZK916N-11ZK918N
Organisme : Ghent University
Commentaires et corrections
Type : ErratumIn
Informations de copyright
© 2020 John Wiley & Sons Ltd.
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