增加降水及施氮对弃耕草地土壤线虫和小型节肢动物的影响

发布时间：2018-02-21 06:26

本文关键词： 降水格局变化氮沉降螨虫跳虫线虫　出处：《生态学杂志》2017年03期 　论文类型：期刊论文

【摘要】：降水格局变化及大气氮沉降对诸多生态过程及功能均有重要影响。然而,目前对于土壤动物对以上两种全球变化趋动因子的响应模式及机制仍缺乏充分认识。本研究利用野外控制试验技术,在中国北方平原弃耕草地生态系统模拟增加降水及大气氮沉降对土壤动物群落的影响。结果表明,增加降水及氮素添加对土壤螨类及跳虫的种群密度均无影响。增加降水使土壤线虫的数量显著增加了14.9%,氮沉降对土壤线虫的数量无影响,但显著增加了群落中食细菌性线虫的数量(45.8%)。本研究表明,土壤线虫对资源有效性及生境微环境变化响应的敏感性强于土壤小节肢动物,且增加降水与氮沉降之间不存在交互作用。
[Abstract]:The changes of precipitation pattern and atmospheric nitrogen deposition have important effects on many ecological processes and functions. At present, the response models and mechanisms of soil animals to the two global change chemokines are still not fully understood. The effects of precipitation and atmospheric nitrogen deposition on soil fauna community were simulated in the abandoned grassland ecosystem in the North Plain of China. The increase of precipitation and nitrogen addition had no effect on the population density of soil mites and jumpers, but increased precipitation significantly increased the number of soil nematodes, but nitrogen deposition had no effect on the number of soil nematodes. The results showed that the sensitivity of soil nematodes to resource availability and environmental changes was stronger than that of soil microarthropods, but the number of bacterial nematode eaters in the community was significantly increased by 45.80.The results showed that the sensitivity of soil nematodes to resource availability and environmental changes was stronger than that of soil microarthropods. There is no interaction between increasing precipitation and nitrogen deposition.
【作者单位】：河南大学生命科学学院;
【基金】：国家自然科学基金项目(31600426)资助
【分类号】：S812

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