Nematode Faunal Response to Grassland Degradation in Horqin Sandy Land

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Nematode Faunal Response to Grassland Degradation in Horqin Sandy Land

机译：科尔沁沙地草地线虫对草地退化的动物响应

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The responses of soil nematode communities to grassland degradation were studied under undegraded grassland (UG),degraded grassland (DG), and improved grassland (IG), in Horqin Sandy Land, Inner Mongolia, Northeast China. Soil samples were collected at depths of 0-10, 10-20, and 20-30 cm. Total organic carbon (TOC) and total nitrogen (TN)exhibited positive effects on the total number of nematodes and trophic groups. Significant treatment effects were found in the total number of nematodes, plant parasites, and omnivores-predators. Measures taken in the improved grassland could improve the number of omnivore-predators, especially in the deeper soil layers. Nematode richness was lower in the DG treatment than in the IG and UG treatments. The food web structure index (SI) was significantly higher in the UG and IG treatments than in the DG treatment. A higher SI suggested a food web with more trophic linkages and relatively healthy ecosystems.

机译：在中国东北部的科尔沁沙地，在未退化草地（UG），退化草地（DG）和改良草地（IG）下研究了土壤线虫群落对草地退化的响应。在0-10、10-20和20-30 cm的深度处收集土壤样品。总有机碳（TOC）和总氮（TN）对线虫和营养族总数有积极影响。在线虫，植物寄生虫和杂食性捕食者的总数中发现了显着的治疗效果。在经过改良的草原上采取的措施可以增加杂食性捕食者的数量，特别是在较深的土壤层中。 DG处理中的线虫丰富度低于IG和UG处理中的线虫丰富度。 UG和IG处理的食物网结构指数（SI）明显高于DG处理。较高的SI表示食物网具有更多的营养联系和相对健康的生态系统。

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《土壤圈（英文版）》 |2007年第5期|611-618|共8页
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作者单位

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

Graduate School of the Chinese Academy of Sciences, Beijing 100049,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

Graduate School of the Chinese Academy of Sciences, Beijing 100049,China;

College of Sciences, Northeastern University, Shenyang 110004,China;

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
functional groups, grassland degradation, Horqin Sandy Land, soil nematodes;

机译：功能群;草地退化;科尔沁沙地;土壤线虫;
入库时间 2022-08-19 04:04:16

Nematode Faunal Response to Grassland Degradation in Horqin Sandy Land

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