School of Ecology and Environment, Ningxia University, Yinchuan 750021, China; Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Ningxia University, Yinchuan 750021, China.
Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Ningxia University, Yinchuan 750021, China.
Sci Total Environ. 2022 Jul 10;829:154631. doi: 10.1016/j.scitotenv.2022.154631. Epub 2022 Mar 18.
Shrub afforestation is an effective way for restoration of soil communities and desertification control in desertified regions. However, little is unknown about how heterogeneous textured soils influence the effectiveness of shrub afforestation on the activities and diversity of ground-active arthropods. In the present study, ground-active arthropods were examined by pitfall trapping as well as by herbaceous performances and soil properties investigated in two shrub microhabitats (the shrub canopy and open spaces) in afforested sandy soil and sandy loam soil of northwestern China. The adjacent shifting sandy land, not covered by shrub plantations, served as a control. Total abundance in the open spaces in afforested sandy soil was significantly (p < 0.05) higher than those in the shrub canopy microhabitats in the same soil type and was also higher than those in both shrub microhabitats (open space and shrub canopy) in afforested sandy loam soil. A consistently (p < 0.05) greater taxa richness and the Shannon index as well as taxa richness of trophic groups (phytophages and predators) was found in shrub microhabitats in both soil types compared to the shifting sandy land. However, no significant differences (p > 0.05) were observed in taxa richness, Shannon index, and the Simpson index of ground-active arthropods, and in the abundance and richness of both trophic groups among the four shrub microhabitats in both soil types. In conclusion, soil textural heterogeneity in terms of soil type had a significant effect on the abundance, but not on the biodiversity distribution and trophic relationship, of ground-active arthropods between shrub microhabitats. The facilitative effect of shrubs benefited a stable biodiversity distribution and thus a stable trophic relationship within ground-active arthropod communities through afforestation practices, regardless of soil type.
灌木造林是恢复荒漠地区土壤群落和防治荒漠化的有效方法。然而，人们对异质质地土壤如何影响灌木造林对地面活动节肢动物活动和多样性的有效性知之甚少。本研究通过陷阱法以及草本植物性能和土壤特性调查，在中国西北地区沙质土壤和砂壤土中，在造林灌木的两个微生境（灌木冠层和空旷地）中研究了地面活动节肢动物。相邻的未种植灌木的移动沙地作为对照。沙质土壤中开阔地的总丰度明显（p <0.05）高于同土壤类型的灌木冠层微生境，也高于两种沙壤土的灌木微生境（开阔地和灌木冠层）。与移动沙地相比，两种土壤类型的灌木微生境中，节肢动物的分类丰富度、香农指数以及营养类群（植食性动物和捕食性动物）的分类丰富度都显著（p <0.05）更高。然而，在两种土壤类型的四个灌木微生境中，地面活动节肢动物的分类丰富度、香农指数和辛普森指数，以及两个营养类群的丰度和丰富度均无显著差异（p >0.05）。总之，土壤质地的异质性对灌木微生境之间地面活动节肢动物的丰度有显著影响，但对其生物多样性分布和营养关系没有影响。无论土壤类型如何，通过造林实践，灌木的促进作用有利于地面活动节肢动物群落中生物多样性的稳定分布，从而稳定营养关系。
