生态学杂志2017，Vol.36Issue(8)：2237-2245,9.DOI:10.13292/j.1000-4890.201708.031
氮沉降对内蒙古典型草原地表节肢动物的影响
Effects of nitrogen deposition on ground-dwelling arthropods in a temperate grassland of Inner Mongolia
摘要
Abstract
Understanding the features of response of the structure and function of grassland ecosystem to nitrogen deposition is fundamental for developing sustainable management systems.For the typical steppe of Inner Mongolia,there exist many studies on the response of plant communities to the increase of nitrogen deposition,but reports about the ground-dwelling arthropods are less available.An investigation on ground-dwelling arthropods in response to different nitrogen additions (N0 (i.e.,control),N2.5,N5,N10) was carried out for 5 years in a typical steppe of Inner Mongolia.Furthermore,the relationship between ground-dwelling arthropods and environmental factors under four levels of nitrogen addition was analyzed.It was found that there were no significant changes in the diversity and abundance of ground-dwelling arthropod community under nitrogen addition treatments (P＞0.05).A significantly greater arthropod biomass was found only under low nitrogen addition treatment compared to the control (P＜0.05).There was generally no sensitive response of functional groups of ground-dwelling arthropods to N addition treatments.The arthropod biomass of predatory,omnivorous and saprophagous groups did not respond signifi candy to N addition (P＞0.05),whereas the biomass of herbivorous was found significantly greater in low-and high-nitrogen treatments than in the control (P ＜ 0.05).Regression analysis showed that the number and biomass of phytophagous arthropods were determined by plant leaf nitrogen content (P＜0.05),whereas those of saprophagous arthropods were influenced by soil organic carbon (P＜0.05).In conclusion,the responses of ground-dwelling arthropod community to nitrogen addition in temperate grassland were mainly affected by their food sources,with an obvious delay compared to plant community.Different functional groups of arthropod had different forms of response to nitrogen addition,which is the main reason for the weaker response at the level of arthropod community.关键词
氮沉降/地表节肢动物/群落结构/功能群/多样性Key words
nitrogen deposition/ground-dwelling arthropod/community structure/functional group/diversity引用本文复制引用
程建伟,刘新民,郝百惠,张芯毓,张宇平,马文红..氮沉降对内蒙古典型草原地表节肢动物的影响[J].生态学杂志,2017,36(8):2237-2245,9.基金项目
国家自然科学基金(31160119,31370454)、国家科技支撑计划项目(2013BAC09B03)和内蒙古重大基础研究开放课题(20120903)资助. （31160119,31370454）
