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首页> 外文期刊>Standards in Genomic Sciences >Fast response of fungal and prokaryotic communities to climate change manipulation in two contrasting tundra soils
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Fast response of fungal and prokaryotic communities to climate change manipulation in two contrasting tundra soils

机译：在两种相反的苔原土壤中，真菌和原核生物群落对气候变化操纵的快速响应

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Climate models predict substantial changes in temperature and precipitation patterns across Arctic regions, including increased winter precipitation as snow in the near future. Soil microorganisms are considered key players in organic matter decomposition and regulation of biogeochemical cycles. However, current knowledge regarding their response to future climate changes is limited. Here, we explore the short-term effect of increased snow cover on soil fungal, bacterial and archaeal communities in two tundra sites with contrasting water regimes in Greenland. In order to assess seasonal variation of microbial communities, we collected soil samples four times during the plant-growing season. The analysis revealed that soil microbial communities from two tundra sites differed from each other due to contrasting soil chemical properties. Fungal communities showed higher richness at the dry site whereas richness of prokaryotes was higher at the wet tundra site. We demonstrated that fungal and bacterial communities at both sites were significantly affected by short-term increased snow cover manipulation. Our results showed that fungal community composition was more affected by deeper snow cover compared to prokaryotes. The fungal communities showed changes in both taxonomic and ecological groups in response to climate manipulation. However, the changes were not pronounced at all sampling times which points to the need of multiple sampling in ecosystems where environmental factors show seasonal variation. Further, we showed that effects of increased snow cover were manifested after snow had melted. We demonstrated rapid response of soil fungal and bacterial communities to short-term climate manipulation simulating increased winter precipitation at two tundra sites. In particular, we provide evidence that fungal community composition was more affected by increased snow cover compared to prokaryotes indicating fast adaptability to changing environmental conditions. Since fungi are considered the main decomposers of complex organic matter in terrestrial ecosystems, the stronger response of fungal communities may have implications for organic matter turnover in tundra soils under future climate.
机译：气候模型预测，整个北极地区的温度和降水模式将发生重大变化，包括在不久的将来，冬季降水会以积雪的形式增加。土壤微生物被认为是有机物分解和生物地球化学循环调控的关键参与者。然而，关于它们对未来气候变化的反应的当前知识是有限的。在这里，我们探讨了积雪增加对两个苔原站点的土壤真菌，细菌和古细菌群落的短期影响，而格陵兰的水环境却与此形成鲜明对比。为了评估微生物群落的季节性变化，我们在植物生长季节四次收集土壤样品。分析表明，由于不同的土壤化学性质，两个苔原站点的土壤微生物群落互不相同。真菌群落在干燥地带表现出较高的丰富度，而在湿地冻原带，原核生物的丰富度更高。我们证明，短期增加的积雪操纵量严重影响了两个地点的真菌和细菌群落。我们的结果表明，与原核生物相比，更深的积雪对真菌群落组成的影响更大。真菌群落显示出响应气候操纵的分类和生态类别的变化。但是，变化并非在所有采样时间都显着，这表明需要在环境因素显示季节性变化的生态系统中进行多次采样。此外，我们表明，积雪融化后，会出现积雪增加的影响。我们证明了土壤真菌和细菌群落对短期气候操纵的快速响应，模拟了两个苔原站点冬季降水的增加。特别是，我们提供的证据表明，与原核生物相比，真菌群落组成受积雪增加的影响更大，表明对环境条件的快速适应性。由于真菌被认为是陆地生态系统中复杂有机物的主要分解物，因此真菌群落的更强响应可能会对未来气候下冻原土壤中有机物的周转产生影响。

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