Programa de Pós-Graduacão em Biologia, Universidade do Vale do Rio dos Sinos, São Leopoldo, RS, 93022-750, Brazil.
Department of Biology, The Pennsylvania State University, University Park, PA, 16802, USA.
Sci Rep. 2024 Jan 10;14(1):959. doi: 10.1038/s41598-023-50394-9.
Climate change has led to an alarming increase in the frequency and severity of wildfires worldwide. While it is known that amphibians have physiological characteristics that make them highly susceptible to fire, the specific impacts of wildfires on their symbiotic skin bacterial communities (i.e., bacteriomes) and infection by the deadly chytrid fungus, Batrachochytrium dendrobatidis, remain poorly understood. Here, we address this research gap by evaluating the effects of fire on the amphibian skin bacteriome and the subsequent risk of chytridiomycosis. We sampled the skin bacteriome of the Neotropical species Scinax squalirostris and Boana leptolineata in fire and control plots before and after experimental burnings. Fire was linked with a marked increase in bacteriome beta dispersion, a proxy for skin microbial dysbiosis, alongside a trend of increased pathogen loads. By shedding light on the effects of fire on amphibian skin bacteriomes, this study contributes to our broader understanding of the impacts of wildfires on vulnerable vertebrate species.
气候变化导致全球范围内野火的频率和严重程度令人震惊地增加。虽然已知两栖动物具有使它们极易受到火灾影响的生理特征，但野火对它们共生的皮肤细菌群落（即细菌组）以及致命的壶菌真菌（Batrachochytrium dendrobatidis）感染的具体影响仍知之甚少。在这里，我们通过评估火灾对两栖动物皮肤细菌组的影响以及随后感染壶菌病的风险来填补这一研究空白。我们在实验燃烧前后，从新热带物种 Scinax squalirostris 和 Boana leptolineata 的皮肤细菌组中采样。火灾与细菌组β分散的显著增加有关，这是皮肤微生物失调的一个指标，同时也有病原菌负荷增加的趋势。本研究通过阐明火灾对两栖动物皮肤细菌组的影响，有助于我们更全面地了解野火对脆弱的脊椎动物物种的影响。
