Reproductive habitat mismatch influences chytrid infection dynamics in a tropical amphibian community

IF 3.5 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Neil A. Gilbert , Rayna C. Bell , Alessandro Catenazzi , Renato A. Martins , Shannon Buttimer , Wesley J. Neely , Carolina Lambertini , Veronica Saenz Calderon , Célio F.B. Haddad , C. Guilherme Becker , Graziella V. DiRenzo
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引用次数: 0

Abstract

Batrachochytrium dendrobatidis (Bd) has been decimating amphibian populations globally; previous work indicates that infection risk increases with moisture and thermal mismatch from a host’s optimum. We hypothesized that, in addition to these abiotic influences, mismatch of hosts from their reproductive habitat heightens infection risk via exposure and/or susceptibility mechanisms. We evaluated this “reproductive habitat mismatch hypothesis” by quantifying the interplay of host breeding mode, habitat, and rainfall on Bd infection dynamics using two years of frog survey data—including swab data for 3427 captures representing 44 species—from Brazil’s Atlantic Forest. We modeled infection prevalence, infection intensity, and the number of frogs captured as a function of rainfall, reproductive mode (aquatic or terrestrial), and habitat (aquatic or terrestrial) using hierarchical models. High rainfall was associated with increases in infection prevalence and infection intensity; however, these increases were particularly apparent for species in habitats that were mismatched from the species’ reproductive habitat. Tropical regions experiencing increases in precipitation will likely see higher Bd risk, and our results indicate that such increases in rainfall will be particularly problematic for species that are forced to move from their reproductive habitats by factors such as habitat loss or thermal stress.
繁殖生境错配影响热带两栖动物群落壶菌感染动态
树突壶菌(Batrachochytrium dendroatidis, Bd)已经在全球范围内造成两栖动物种群的大量灭绝;先前的研究表明,与宿主的最佳湿度和温度不匹配会增加感染风险。我们假设,除了这些非生物影响外,宿主与其生殖栖息地的不匹配通过暴露和/或易感性机制增加了感染风险。我们通过量化宿主繁殖模式、栖息地和降雨对Bd感染动态的相互作用来评估这一“繁殖栖息地失配假说”,使用了两年的青蛙调查数据,包括来自巴西大西洋森林的44个物种的3427次捕获的swab数据。我们使用分层模型模拟了感染流行率、感染强度和捕获的青蛙数量作为降雨、繁殖方式(水生或陆生)和栖息地(水生或陆生)的函数。高降雨量与感染流行率和感染强度的增加有关;然而,这些增加在栖息地与物种繁殖栖息地不匹配的物种中尤为明显。经历降水增加的热带地区可能会有更高的Bd风险,我们的研究结果表明,降雨的增加对那些因栖息地丧失或热应激等因素而被迫离开繁殖栖息地的物种来说尤其成问题。
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来源期刊
Global Ecology and Conservation
Global Ecology and Conservation Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.10
自引率
5.00%
发文量
346
审稿时长
83 days
期刊介绍: Global Ecology and Conservation is a peer-reviewed, open-access journal covering all sub-disciplines of ecological and conservation science: from theory to practice, from molecules to ecosystems, from regional to global. The fields covered include: organismal, population, community, and ecosystem ecology; physiological, evolutionary, and behavioral ecology; and conservation science.
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