生态恢复方式对喀斯特土壤节肢动物群落特征的影响

Effects of Ecological Recovery Practices on the Characteristics of Soil Arthropod Community in Karst Region

为了解不同生态恢复方式对土壤节肢动物群落特征的影响,2012年2月对喀斯特地区撂荒地、退耕还林地和自然林(对照)进行了土壤节肢动物调查。结果表明:在调查区共捕获土壤节肢动物25 898只,隶属7纲18目95科146类。各生境土壤节肢动物类群数和密度-类群指数无显著差异,自然林和退耕还林地个体密度显著高于撂荒地。撂荒地土壤节肢动物优势类群组成与自然林、退耕还林地明显不同,自然林和退耕还林地土壤节肢动物优势类群组成相对接近。喀斯特退化生态系统生态恢复方式对土壤节肢动物群落特征有显著影响,植被差异是影响土壤节肢动物群落特征的主要因素,退耕还林更有利于土壤节肢动物的恢复。

In order to study the effects of ecological recovery practices on the characteristic of soil arthropod community, an investigation was conducted in fallow, Pinus massoniana plantation and natural forest （CK） in Karst region in February, 2012. The results showed that a total of 25 898 individuals were collected. And they were classified into 7 classes, 18 orders, 95 families, and 146 groups. The number of taxonomic groups and DG index of soil arthropod had no significant difference between the three habitats, but individual density in the CK and P. massoniana plantation were significantly higher than the fallow. There were significant differences of dominant taxonomic group composition of soil arthropod in fallow compared with CK and P. massoniana plantation, but dominant taxonomic group composition of soil arthropod relatively approached in CK and P. rnassoniana plantation compared with fallow. All results above showed that restoration practices had a significant effect on the community characteristics of soil arthropod, P. massoniana plantation maybe efficiently restores the degraded ecosystem in comparison with fallow, and different vegetation was the main affecting factors.