Nitrogen enrichment affects the competition network of aboveground species on the Inner Mongolia steppe

doi:10.1016/j.gecco.2021.e01826

	Nitrogen enrichment affects the competition network of aboveground species on the Inner Mongolia steppe
	Sun, Qingqing ; Yang, Junjie 1; Wang, Shan ; Yang, Fengyan ; Zhang, Guangming 1,2; Wei, Cunzheng 1; Han, Xingguo1 ; Li, Jinshan
	2021
发表期刊	GLOBAL ECOLOGY AND CONSERVATION
卷号	31
摘要	Nitrogen(N) enrichment changes the community structure of terrestrial ecosystems. However, the patterns and structural functions of species interaction networks under N-enrichment conditions are still unclear. We compared and analysed data from 13 years of N deposition experiments in the Inner Mongolia temperate steppe in China. We found that spatial association effectively detected intransitive networks, the structure of which was occasionally changed by species with low biomass but high-frequency occurrence, as an especially vital intermediary for forming a large network. The peak value of the network complexity was maintained at 2 gNm(-2) year(-1). In the third year after fertilization at 50 gNm(-2) year(-1), the species interaction changed to transitivity, which lasted for 8 years. Then, the environment completely replaced species interactions as the main factor affecting community composition. Surprisingly, the negative effect of N enrichment on the species network was counteracted by mowing and precipitation, which increased the probability of intransitive network formation. In the intransitive network, species diversity was not only maintained but also increased under low N-addition rates from 0 gNm(-2) year(-1) to 3 gNm(-2) year(-1). These studies indicated that N enrichment reduced the complexity of the species network and increased hierarchical differences among species competition. Intransitive competition is highly prevalent and a key driver of species coexistence and diversity maintenance in the typical steppe. Moreover, environmental factors directly affect plant intransitive competition, resulting in changes in species diversity.
关键词	Nitrogen deposition Species competitive network Species richness Intransitivity competition Network complexity Inner Mongolia steppe
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1016/j.gecco.2021.e01826
收录类别	SCI
语种	英语
WOS关键词	INTRANSITIVE COMPETITION ; ECOSYSTEM STABILITY ; COMMUNITY STRUCTURE ; BIOTIC INTERACTIONS ; PLANT-COMMUNITIES ; TYPICAL STEPPE ; DIVERSITY ; BIODIVERSITY ; DEPOSITION ; SCALE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000704592100002
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	2351-9894
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23080403] ; National Key Research and Development Project of China [2016YFC0500705] ; Fundamental Research Funds for the Central Universities [2015ZCQ-LY-01]
作者邮箱	xghan@ibcas.ac.cn ; lijinshan@bjfu.edu.cn
作品OA属性	gold
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26667
专题	植被与环境变化国家重点实验室
作者单位	1.Beijing Forestry Univ, Coll Sci, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Changzhi Med Coll, Dept Pharmaceut Sci, Changzhi 046000, Peoples R China
推荐引用方式 GB/T 7714	Sun, Qingqing,Yang, Junjie,Wang, Shan,et al. Nitrogen enrichment affects the competition network of aboveground species on the Inner Mongolia steppe[J]. GLOBAL ECOLOGY AND CONSERVATION,2021,31.
APA	Sun, Qingqing.,Yang, Junjie.,Wang, Shan.,Yang, Fengyan.,Zhang, Guangming.,...&Li, Jinshan.(2021).Nitrogen enrichment affects the competition network of aboveground species on the Inner Mongolia steppe.GLOBAL ECOLOGY AND CONSERVATION,31.
MLA	Sun, Qingqing,et al."Nitrogen enrichment affects the competition network of aboveground species on the Inner Mongolia steppe".GLOBAL ECOLOGY AND CONSERVATION 31(2021).

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