阿热湿地夏季土壤肉鞭虫群落特征研究

Community Characteristics of Summer soil Sarcodines and Flagellates at Are Wetland in Tibet

2013年6月~2014年5月,根据土壤环境特点在西藏拉萨市当雄县阿热湿地内共设置了5个不同类型的土壤生境环境作为采样点,采用"非淹没培养皿法"及活体观察法对阿热湿地土壤肉鞭虫进行了研究。共记录了肉鞭虫42种(包括7个未定名种),隶属于2亚门、4纲、11目、17科、26属。其中植鞭纲(Phytomastigophorea)和叶足纲(Lobosea)的物种占绝对优势,均为19种;在鞭毛亚门植鞭纲中,眼虫目(Euglenida)的物种占优势,为10种,占鞭毛虫总数的47.6%;在肉足亚门叶足纲中,变形目(Amoebida)的物种占绝对优势,为13种,占整个肉足虫总数的61.9%。1~5号生境的Gleason-Margalef多样性指数分别为2.09、1.63、1.40、1.29、1.24,其中1号、2号生境多样性高,4号、5号多样性指数低。所有生境的Jaccard相似性系数小于0.5,说明各生境的空间异质性比较大。

Community characteristics of soil sarcodines and flagellates in the Are-wetland were studied by'non-flooded petri dish method'and in vivo observation from June 2013 to May 2014.A total of 42 species wererecorded,including 7 unidentified species belonging to 26 genera,17 families,11 orders,4 classes,2 subphy-lum.The results show that the dominant groups were Phytomastigophorea and Lobosea with 19 species for each.Euglenida was the dominant order of flagellates with 10 species account for 47.6% of total species in flagellates,the Amoebida was the dominant order of Sarcodinida with 13 species account for 61.9% of total species in Sarco-dinida.The biodiversity index of Gleason-Margalef for1-5 simple sits were 2.09、1.63、1.40、1.29 and 1.24 re-spectively that indicates under different grazing pressure on the simple sits with different biodiversity index.Jac-card similarity coefficients were less than 0.5 that indicate the different condition of the simple sits.