喀斯特石漠化地区土壤动物功能类群及培育研究

为了解石漠化地区土壤动物功能类群对生态恢复的响应,2010年9月至11月在贵州花江喀斯特峡谷区对不同石漠化等级的土壤动物进行了田间培育研究。结果显示:喀斯特石漠化区土壤动物可以划分为杂食性、植食性、腐食性和捕食性4个生态功能类群,各样地均以杂食性动物的物种数量和个体数量所占比例最大,捕食性动物所占比例较小;土壤动物功能类群随石漠化程度加深,物种数减少,个体数量不存在这种关系;物种丰富度、Shannon多样性指数随着石漠化程度加深而升高,均匀性、优势度指数则趋于下降;土壤动物培育发现,不同等级石漠化对土壤动物功能类群分布有影响,土壤动物种类和数量分布可以揭示石漠化生态恢复现状。

Research on the function groups of soil fauna in Karst stone desertification area

In order to understand functional class groups of soil animals in rocky desertification area response to ecological rehabilitation,we took artificial propagation in fields according to different rocky desertification degree in Huajiang gorge area,Guizhou province,during September to November,2010.The results showed soil animals in rocky desertification land could be divided into carnivorous,herbivorous,saprophagous and predatory 4 ecological functional groups.In all observation fields,omnivorous animals constituted the largest class in individual number and species number,predatory animals was the smallest;With the rocky desertification degree aggravating,soil animal species reduced.Richness,Shannon index increased with the rocky desertification degrees;Evenness and dominance index decreased.Fields propagation studies indicated that different rocky desertification degrees influenced upon functional groups distribution of soil animals,and the distribution of soil animal species and the number suggest the rehabilitation status of rocky desertification.