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首页> 外文期刊>Polar biology >Are Soil Biota Buffered Against Climatic Extremes?an Experimental Test On Testate Amoebae In Arctic Tundra (qeqertarsuaq, West Greenland)
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Are Soil Biota Buffered Against Climatic Extremes?an Experimental Test On Testate Amoebae In Arctic Tundra (qeqertarsuaq, West Greenland)

机译：土壤生物区系是否能抵御气候极端事件？对北极苔原（qeqertarsuaq，西格陵兰岛）的睾丸变形虫的实验测试

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摘要

Climate warming is likely to have pronounced impacts on soil biota in arctic ecosystems. In a warmer climate, heatwaves are more frequent and intense, but it is unclear to what extent soil communities are buffered against this. We studied the effects of an artificially induced heatwave on the structure of testate amoebae communities in dry heath tundra in Qeqertarsuaq (Disko Island, West Greenland) during the summer of 2003. While the heatwave was severe enough to induce significant leaf mortality in the aboveground vegetation, overall testate amoebae abundance did not react to the difference in temperature. However, in the heated plots transient shifts in species populations occurred during the exposure, followed by increases in species richness weeks after the heatwave had ended. The most important taxa appearing after the heating period belonged to bacterivorous genera, in agreement with a transient peak in bacterial colony forming units, caused by the heatwave. Lobose testate amoebae resisted the heating and its associated desiccation better than their filose counterparts.
机译：气候变暖可能会对北极生态系统中的土壤生物群产生明显影响。在温暖的气候下，热浪更加频繁和强烈，但尚不清楚土壤群落在多大程度上可以缓解这种情况。我们在2003年夏季研究了人工热浪对Qeqertarsuaq（西格陵兰岛迪斯科岛）干荒地冻原苔原的睾丸变形虫群落结构的影响。尽管热浪严重到足以引起地上植被的重要叶片死亡。 ，总睾丸变形虫的丰度对温度的差异没有反应。但是，在加热的地块中，暴露期间物种种群发生了瞬时变化，随后在热浪结束后数周物种多样性增加。加热期之后出现的最重要的分类单元是细菌属，与热浪引起的细菌菌落形成单位的瞬时峰值一致。散叶的睾丸变形虫比其丝状的同种异体更好地抵抗了加热及其相关的干燥。

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