中文摘要：

长江中游高山泥炭湿地在区域生态安全和生物多样性保护方面具有举足重要的地位，有壳变形虫是一类在泥炭湿地表面大量生活的原生动物，它们对环境变化敏感，是环境变化的有效指示器。泥炭湿地的现代生态学调查已经表明，有壳变形虫群落对泥炭的表面湿度和水文条件具有灵敏的响应，但是与其他环境条件如水化学因子的关系尚不明确。本文主要调查了长江中游高山泥炭湿地有壳变形虫群落特征及其对水化学因子的响应，发现Cr和Mn对有壳变形虫的群落组成具有较为明显的影响。有壳变形虫的群落组成在不同湿地间有一定差异，这种空间上的差异分布可能反映了湿地的不同类型、发育阶段和人类活动等信息。有壳变形虫可为湿地的科学管理、动态监测和可持续发展等方面提供有效的指示信息。

英文摘要：

The rare distributions of peatlands near the middle reach of Yangtze River are important for their biodiversity, local ecological safety, climate change, hydrology and as historical archives. To investigate the biodiversity and ecology in the peatlands can help us to better understand their ecological roles for the society. A total 69 number of Sphagnum samples were collected from five different peatlands in Dajiuhu （23 samples） , Erxianyan （20 samples） and Qizimeishan（26 samples）in July 2010. The upper 5cm Sphagnum were collected for testate amoebae analysis. A small hole was drilled at each sampling site to test the depth to water table （ DTW）, pH and conductivity. At each site, about 20ml water was taken to the lab for chemistry analysis. Testate amoebae are a kind of protozoa that build a test （shell） , in which a single amoeboid cell is enclosed. They occur worldwide in a range of terrestrial,wetland,lakes and especially are abundant in Sphagnum-dominated peats. They are sensitive to environmental changes and thus as excellent indicators for biomonitoring. A lot of studies have repeatedly proven that surface moisture or the depth to water table （DTW）in peatlands is the most important factor to control the distribution of testate amoeba communities. However, the relationship between testate amoebae and water chemistry is still unclear. This study investigated the response of testate amoebae community to water chemistry in peatlands near the middle Yangtze reaches of Central China. The results showed that Cr and Mn can significantly affect testate amoebae community. The differences of testate amoebae community between different sites may reflect the type, characters, and human activities among peatlands. Our results suggested that testate amoebae can be as indicators for peatlands management,biomonitoring and sustainable development.