放牧对沼泽化草甸土壤纤毛虫群落的影响

发布时间：2018-04-28 22:04

本文选题：放牧强度 + 土壤纤毛虫　；参考：《生态学杂志》2017年06期

【摘要】：通过对甘南玛曲县3个不同放牧强度(全年禁牧、季节性放牧、全年放牧)的沼泽化草甸土壤纤毛虫群落研究调查,共鉴定纤毛虫105种,分别隶属于8纲、17目、30科、39属。在3种放牧强度下,季节性放牧纤毛虫物种多样性指数最高,全年禁牧次之,全年放牧最小;C/P系数(肾形类纤毛虫与多膜类纤毛虫种类数的比值)排序为季节性放牧全年禁牧全年放牧;全年禁牧和季节性放牧土壤纤毛虫的群落相似性较高,而全年放牧和全年禁牧样点之间群落差异较大。土壤含水量、有机质与物种数、密度及多样性指数呈极显著正相关(P0.01),全磷与密度呈极显著正相关(P0.01)且与物种数和物种多样性指数呈显著正相关(P0.05)。对土壤纤毛虫群落组成参数(物种数、物种多样性指数、密度)与土壤环境因子(土壤温度、含水量、pH、有机质、全氮、全磷、速效磷、无机氮)进行冗余分析,结果表明,土壤含水量、有机质、全氮对纤毛虫的群落组成影响较大,其中有机质对土壤纤毛虫群落的影响最大。
[Abstract]:A total of 105 species of ciliates belonging to 8 classes, 17 orders, 30 families and 39 genera were identified by investigation on soil ciliate communities of three marsh meadows in Maqu County, Gannan, with different grazing intensities (annual grazing, seasonal grazing and annual grazing). Under the three grazing intensities, the species diversity index of ciliates in seasonal grazing was the highest, followed by forbidding grazing in the whole year. The lowest C / P coefficient (the ratio of the number of renal ciliates to the species of polymembranous ciliates) was ranked as seasonal grazing, and the community similarity of ciliates was higher than that of seasonal grazing. The community difference between grazing and no-grazing sites was significant. Soil water content, organic matter and species number, density and diversity index were significantly positively correlated with P0.01N, and total phosphorus was positively correlated with species number and species diversity index (P0.05). The soil ciliates community composition parameters (species number, species diversity index, density) and soil environmental factors (soil temperature, water content, pH, organic matter, total nitrogen, total phosphorus, available phosphorus, inorganic nitrogen) were analyzed. Soil water content, organic matter and total nitrogen had great influence on the community composition of ciliates, among which organic matter had the greatest effect on the community of ciliates.
【作者单位】：西北师范大学生命科学学院;兰州大学生命科学学院;
【基金】：国家自然科学基金项目(41361055、40930533)资助
【分类号】：S812.2

【相似文献】