麦积山肉鞭毛虫的物种多样性

用活体观察法对迄今缺乏了解的麦积山肉鞭类原生动物的物种多样性进行了调查，共鉴定出水生肉鞭虫100种，包括2个未知种。鞭毛亚门（Mastigophora）有2纲9目15科31属59种。植鞭纲（Phytomastigophorea）有52种，其中眼虫目(Euglenida) 36种，占鞭毛虫物种总数的61.02%，为优势类群；动鞭纲（Zoomastigophorea）仅有7种，没有明显的优势类群。肉足亚门（Sarcodina）有4纲6目19科32属41种。叶足纲（Lobosea）有31种，其中变形目（Amoebida）16种，占肉足虫物种总数的39.02%，为优势类群；表壳目（Arcellinida）12种，占29.27%，为次优势类群。在麦积山风景名胜区的南坡（为嘉陵江水系）分布有71种，北坡（为渭河水系）分布有56种，分水岭分布有13种，水生肉鞭毛虫的群落组成也显著不同；与国内典型的长江水系、雅鲁藏布江水系和黄河水系相比，麦积山分布的水生肉鞭毛虫群落组成均存在显著性差异。结果表明，麦积山水生肉鞭毛虫物种十分丰富，特有和稀有物种繁多，具有鲜明的独特性。

Species diversity of aquatic Sarcomastigophoran (Protista, Sacromastigophora) in scenic spots and historic sites of Maiji Mountain

The species diversity of aquatic sarcomastigophoran in Scenic Spots and Historic Sites of Maiji Mountain was studied by observation in vivo, and 100 species including 2 unknown ones were identified. 59 species were identified in Mastigophora, belonging to 2 classes, 9 orders, 15 families and 31 genera. There were 52 species in Phytomastigophorea, and 36 species belong to Euglenida,accounting for 61.02% of M astigophora, so Euglenida was the dominant group. There were only 7 species in Zoomastigophorea, and the dominant group was unobvious. 41 species were identified in Sarcodina, belonging to 4 classes, 6 orders, 19 families and 32 genera. There were 31 species in Lobosea, and 16 species belong to Amoebida which was the dominant group,accounting for 39.02% of Sarcodina, Arcellinida (12 species) was the subdom-inant group, accounting for 29.27% of Sarcodina. 71, 56, 13 species were identified in the south hillside (Jialingjiang River systems), north hillside (Weihe River systems) and Watershed of Maiji Mountain, respectively. The species com-position of the community were very different in three areas. The species composition of aquatic Sarcomastigophora in Sce-nic Spots and Historic Sites of Maiji Mountain and were quite dissimilar to that in the Yangtze River, the Yalu Tsangpo River, Yellow River and other river systems. The results showed that there were rich in species, endemic species and rare species in the community of aquatic Sarcomastigophora, which indicated the prominent uniqueness of the community of aquatic Sarcomastigophora in Scenic Spots and Historic Sites of Maiji Mountain.