摘要
应用类群数、个体密度、多样性指数和功能类群指数等多个群落参数,研究刈割活动对松嫩草原碱化羊草草地土壤线虫群落特征的影响。本研究共捕获土壤线虫8,335条,分别隶属于线虫动物门2纲7目23科40属。结果表明,与围栏封育样地相比,刈割活动样地中线虫个体密度和类群数显著减少,群落多样性指数(H′)、均匀度指数(J)和丰富度指数(SR)虽低于围栏封育样地,但两类处理间差异不显著,表明刈割活动尽管明显降低土壤线虫群落个体密度和类群数,但对土壤线虫群落多样性的影响有限;样地间PPI/MI值差异明显,表明刈割活动在一定程度上确实改变了土壤线虫功能类群组成,其中受影响的主要是非植物寄生线虫。
We used generic number, individual density, biodiversity, and functional group index to analyze the effect of mowing practice on soil nematode community in alkalinized grasslands ofLeymus chinensis in Songnen Plain, Northeast China. A total of 8,335 soil nematode individuals were collected, belonging to two classes, seven orders, 23 families, and 40 genera. The results indicated that the generic number and individual density of soil nematodes were significantly lower in the land under mowing practice （MP） treatment than that under fencing enclosure （FE） treatment, whereas the diversity index showed no significant difference between the two treatments. The results also suggested that PPI/MI was sensitive to mowing practice, which changed the composition of functional groups of soil nematodes, especially that of free-living soil nematodes.
出处
《生物多样性》
CAS
CSCD
北大核心
2007年第2期180-187,共8页
Biodiversity Science
基金
国家自然科学基金(40601047)
中国科学院知识创新工程重要方向项目(KZCX3-SW-356)
吉林大学创新基金(4CX105)
中国博士后科学基金(20060390643)
关键词
土壤线虫
刈割活动
羊草
松嫩草原
soil nematodes, mowing practice, Leymus chinensis, Songnen Plain
