Testate amoebae contribute significantly to belowground ecological processes like nutrient cycling, but a decline in their nutrient cycling functions in peatlands is expected due to global climate warming. We studied the dynamics of testate amoebae communities in relation to soil environmental variables in a permafrost peatland that experienced in situ experimental warming for a 7-yr period. Experimental warming reduced testate amoebae biomass by 41%. Redundancy analyses showed that testate amoebae community structure was correlated with water table depth and soil temperature (these explained 10% of the variance in community structure) and dissolved organic carbon (which explained 2.2% of the variance). Our results demonstrated that warming-induced changes to the water table depth affected the testate amoebae community in peatland, which could have consequences for the stability of the microbial food web and carbon cycling in peatland ecosystems.

睾丸变形虫对地下生态过程（如养分循环）有重要贡献，但由于全球气候变暖，预计泥炭地中养分循环功能将下降。我们研究了多年冻土泥炭地中经历了7年原地试验变暖的土壤中环境变量相关的睾丸变形虫群落的动态。实验升温使睾丸变形虫的生物量减少了41％。冗余分析表明，睾丸变形虫的群落结构与地下水位和土壤温度（解释了群落结构变化的10％）和溶解有机碳（解释了变化2.2％）相关。我们的结果表明，变暖引起的地下水位变化影响了泥炭地的睾丸变形虫群落，