Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13610 |
Effects of amphibian phylogeny, climate and human impact on the occurrence of the amphibian-killing chytrid fungus | |
Bacigalupe, Leonardo D.1; Soto-Azat, Claudio2; Garcia-Vera, Cristobal3; Barria-Oyarzo, Ismael1; Rezende, Enrico L.4 | |
2017-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Chile |
英文摘要 | Chytridiomycosis, due to the fungus Batrachochytrium dendrobatidis (Bd), has been associated with the alarming decline and extinction crisis of amphibians worldwide. Because conservation programs are implemented locally, it is essential to understand how the complex interactions among host species, climate and human activities contribute to Bd occurrence at regional scales. Using weighted phylogenetic regressions and model selection, we investigated geographic patterns of Bd occurrence along a latitudinal gradient of 1500 km within a biodiversity hot spot in Chile (1845 individuals sampled from 253 sites and representing 24 species), and its association with climatic, socio-demographic and economic variables. Analyses show that Bd prevalence decreases with latitude although it has increased by almost 10% between 2008 and 2013, possibly reflecting an ongoing spread of Bd following the introduction of Xenopus laevis. Occurrence of Bd was higher in regions with high gross domestic product (particularly near developed centers) and with a high variability in rainfall regimes, whereas models including other bioclimatic or geographic variables, including temperature, exhibited substantially lower fit and virtually no support based on Akaike weights. In addition, Bd prevalence exhibited a strong phylogenetic signal, with five species having high numbers of infected individuals and higher prevalence than the average of 13.3% across all species. Taken together, our results highlight that Bd in Chile might still be spreading south, facilitated by a subset of species that seem to play an important epidemiological role maintaining this pathogen in the communities, in combination with climatic and human factors affecting the availability and quality of amphibian breeding sites. This information may be employed to design conservation strategies and mitigate the impacts of Bd in the biodiversity hot spot of southern Chile, and similar studies may prove useful to disentangle the role of different factors contributing to the emergence and spread of this catastrophic disease. |
英文关键词 | amphibian population declines Batrachochytrium dendrobatidis Chile chytrid fungus chytridiomycosis emerging infectious diseases |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406812100012 |
WOS关键词 | EMERGING INFECTIOUS-DISEASES ; BULLFROGS RANA-CATESBEIANA ; WITHIN-SPECIES VARIATION ; BATRACHOCHYTRIUM-DENDROBATIDIS ; POPULATION DECLINES ; ENVIRONMENTAL DETERMINANTS ; XENOPUS-LAEVIS ; CENTRAL CHILE ; CHYTRIDIOMYCOSIS ; PATHOGEN |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17644 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Austral Chile, Fac Ciencias, Inst Ciencias Ambientales & Evolut, Avda Rector Eduardo Morales S-N,Edificio Pugin, Valdivia, Chile; 2.Univ Andres Bello, Fac Ecol & Recursos Nat, Ctr Invest Sustentabilidad, Republ 440, Santiago, Chile; 3.Minist Obras Publ, Direcc Gen Aguas, Riquelme 465, Coyhaique, Chile; 4.Univ Andres Bello, Fac Ecol & Recursos Nat, Republ 440, Santiago, Chile |
推荐引用方式 GB/T 7714 | Bacigalupe, Leonardo D.,Soto-Azat, Claudio,Garcia-Vera, Cristobal,et al. Effects of amphibian phylogeny, climate and human impact on the occurrence of the amphibian-killing chytrid fungus[J]. GLOBAL CHANGE BIOLOGY,2017,23(9). |
APA | Bacigalupe, Leonardo D.,Soto-Azat, Claudio,Garcia-Vera, Cristobal,Barria-Oyarzo, Ismael,&Rezende, Enrico L..(2017).Effects of amphibian phylogeny, climate and human impact on the occurrence of the amphibian-killing chytrid fungus.GLOBAL CHANGE BIOLOGY,23(9). |
MLA | Bacigalupe, Leonardo D.,et al."Effects of amphibian phylogeny, climate and human impact on the occurrence of the amphibian-killing chytrid fungus".GLOBAL CHANGE BIOLOGY 23.9(2017). |
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