2024-02-09 ペンシルベニア州立大学(PennState)
◆この研究は、異常な降雨パターンが、気候変動や森林伐採によって悪化することが予想されており、野生動物と微生物の相互に有益な関係を乱し、生物多様性の減少を引き起こす可能性があることを示唆しています。ペンシルバニア州立大学の博士課程生シャノン・バティマー氏と生物学の教授ギリェルメ・ベッカー氏をリードとする研究チームは、これらの発見を『エコロジー・レターズ』に発表しました。
<関連情報>
- https://www.psu.edu/news/huck-institutes-life-sciences/story/drought-may-drive-deadly-amphibian-disease-researchers-find/
- https://onlinelibrary.wiley.com/doi/full/10.1111/ele.14372
皮膚マイクロバイオームの乱れが干ばつに関連する両生類の病気に関連していることが明らかになった Skin microbiome disturbance linked to drought-associated amphibian disease
Shannon Buttimer, Diego Moura-Campos, Sasha E. Greenspan, Wesley J. Neely, Lucas Ferrante, Luís Felipe Toledo, C. Guilherme Becker
Ecology Letters Published: 26 January 2024
DOI:https://doi.org/10.1111/ele.14372
Abstract
The onset of global climate change has led to abnormal rainfall patterns, disrupting associations between wildlife and their symbiotic microorganisms. We monitored a population of pumpkin toadlets and their skin bacteria in the Brazilian Atlantic Forest during a drought. Given the recognized ability of some amphibian skin bacteria to inhibit the widespread fungal pathogen Batrachochytrium dendrobatidis (Bd), we investigated links between skin microbiome health, susceptibility to Bd and host mortality during a die-off event. We found that rainfall deficit was an indirect predictor of Bd loads through microbiome disruption, while its direct effect on Bd was weak. The microbiome was characterized by fewer putative Bd-inhibitory bacteria following the drought, which points to a one-month lagged effect of drought on the microbiome that may have increased toadlet susceptibility to Bd. Our study underscores the capacity of rainfall variability to disturb complex host–microbiome interactions and alter wildlife disease dynamics.
