摘要
为了解不同砍伐处理对常绿阔叶林中土壤动物群落结构的影响,于2007年7月至2008年4月在浙江天童地区常绿阔叶林中对5个砍伐4年后的恢复样地进行四季采样。样地处理分别是:(I)去除大树保留萌枝、(II)去除地表植物保留枯枝落叶层、(III)去除地表植物和10cm表土、(IV)清除下木层保留大树及(V)对照。结果显示:I号样地土壤动物个体数量最多,除I号样地与III号样地差异显著外(P<0.05),其他样地间不存在显著差异;各样地表层土壤动物数量均与5-10cm、10-15cm层有显著差异(P<0.05);II号样地类群丰富度最高;I号样地DG指数最高,III号样地最低;弹尾目、啮目、伪蝎目和半翅目与群落总体特征(DG指数)的相关性都达到了极显著水平(P<0.001)。结果表明砍伐在一定程度上改变了土壤动物的类群组成,砍伐强度越大,土壤动物受影响越大。
To understand the effects of ground cover removal on soil animal communities, we investigated the soil fauna community in an evergreen broad-leaved forest logged four years ago at Tiantong, Zhejiang Province between July, 2007 and April, 2008. We used the five following treatments in five sites： （I） big trees with height〉8 m and DBH〉5 cm were removed but sprouts retained; （II） ground surface vegetation was removed but litter retained; （III） all vegetation and 0-10 cm topsoil were removed; （IV） undergrowth was removed but big trees retained; and （V） a control plot without any disturbance. Soil animal density only differed between site I and site III （P〈0.05）. The highest density was found at site I. Species richness of soil animals in the 0-5 cm layer was significantly higher than in the 5-10 cm and 10-15 cm layer （P〈0.05）. Site II was higher than the other four sites in terms of group richness. Based on the density-group index, diversity was highest at site I and lowest at site III. The density of Collembola, Psocoptera, Pseudoscorpiones and Hemiptera were correlated with changes in the density-group index （P〈0.001）. Our results indicate ground cover characteristics impact the composition of soil communities; the more intense the disturbance, the greater the influence on soil animals.
出处
《生物多样性》
CAS
CSCD
北大核心
2009年第2期160-167,共8页
Biodiversity Science
基金
浙江天童森林生态系统国家野外科学观测研究站开放课题(51X1412E)
关键词
干扰
土壤动物
常绿阔叶林
天童
disturbance, soil animal, evergreen broad-leaved forest, Tiantong
