Landslide mountain fens formed in landslide depressions are dynamic environments as their development is disturbed by a number of factors, for example, landslides, slopewash, and surface run-off. These processes lead to the accumulation of mineral material and wood in peat. Disturbed peatlands are interesting archives of past environmental changes, but they may be challenging for providing biotic proxy-based quantitative reconstructions. Here we investigate long-term changes in testate amoeba communities from two landslide mountain fens – so far an overlooked habitat for testate amoeba investigations. Our results show that abundances of testate amoebae are extremely low in this type of peatlands, therefore not suitable for providing quantitative depth-to-water table reconstructions. However, frequent shifts of dominant testate amoeba species reflect dynamic lithological situation of the studied fens. We observed that high and stable mineral matter input into the peatlands was associated with high abundances of species producing agglutinated (xenosomic) as well as idiosomic shells which prevailed in the testate amoeba communities in both analyzed profiles. This is the first study that explores testate amoebae of landslide mountain fens in such detail, providing novel information about microbial communities of these ecosystems.

滑坡洼地中形成的滑坡山是动态环境，因为其发展受到许多因素的干扰，例如，滑坡，斜坡冲刷和地表径流。这些过程导致泥炭中矿物质和木材的积累。被扰动的泥炭地是过去环境变化的有趣档案，但是它们对于提供基于生物代理的定量重建可能具有挑战性。在这里，我们调查了两个滑坡山的睾丸变形虫群落的长期变化-到目前为止，这是一个被遗忘的睾丸变形虫调查的栖息地。我们的结果表明，在这类泥炭地中，睾丸变形虫的丰度极低，因此不适合提供定量的水深表重建。然而，优势睾丸变形虫的频繁转移反映了所研究的s的动态岩性情况。我们观察到，向泥炭地输入高而稳定的矿物质与产生凝集的（异源的）物种以及习惯性的壳（在两个分析剖面中的睾丸变形虫群落中盛行）的物种丰富有关。这是第一个如此详细地研究滑坡山test的睾丸变形虫的研究，为有关这些生态系统的微生物群落提供了新颖的信息。