N-enrichment induced biodiversity loss can be explained by reductions in competitive intransitivity: Evidence from a decade-long grassland experiment

doi:10.1016/j.envexpbot.2021.104372

	N-enrichment induced biodiversity loss can be explained by reductions in competitive intransitivity: Evidence from a decade-long grassland experiment
	Liu, Lian 1; Cheng, Junhui 2; Li, Yawen 1; Lan, Zhichun 3,4; Bai, Yongfei5
	2021
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	184
摘要	Recent theoretical and empirical studies demonstrate that intransitive competition is an important mechanism promoting species coexistence and biodiversity maintenance. Few studies, however, have examined how intransitive competition is affected by N enrichment and spatial scale in natural communities. Based on species abundance data from a decade-long field experiment with a control and six levels of N addition rate in semi-arid grassland, we examined the effects of fertilization treatment and spatial scale on competitive intransitivity by using a recently developed Markov chain model approach. Although the relative strength of competitive intransitivity was low (I < 0.3) it was common across all, common and rare species, and over different species pools, with significant competitive intransitivity being detected amongst 60-74 % of the plots in control and nutrient treatment communities. The overall species richness consistently increased with increasing competitive intransitivity among all species and common species; however, the positive effects of intransitivity among rare species on diversity among rare species occurred only at small to moderate spatial scales. For abundance-based species groups, a negative linear relationship between competitive intransitivity and N fertilization rate was common. For trait-based functional groups, the negative effect of high N inputs on competitive intransitivity was found in seven of eight functional groups. For all species groups, the degree of competitive intransitivity generally declined with increasing spatial scale. Our study presents strong evidence that a high degree of competitive intransitivity could promote species coexistence by reducing the negative effect of N fertilization on biodiversity in natural communities. Given that the global N deposition rate is projected to increase in this century, our study sheds new light on the effects and underlying mechanisms of increased N inputs on biodiversity maintenance in semi-arid grasslands.
关键词	Competitive intransitivity Sampling scale N fertilization Markov chain model Trait-based functional groups
学科领域	Plant Sciences ; Environmental Sciences
DOI	10.1016/j.envexpbot.2021.104372
收录类别	SCI
语种	英语
WOS关键词	SPECIES LOSS ; MECHANISMS ; COEXISTENCE ; SCALE ; COMMUNITY ; THRESHOLDS ; PATTERNS ; DRIVERS ; TRAITS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000642457200003
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-7307
资助机构	National Natural Science Foundation of China [31630010, 31320103916]
作者邮箱	yfbai@ibcas.ac.cn
引用统计	被引频次：4[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/2S10CLM1/26668
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China 3.Xinjiang Agr Univ, Coll Grassland & Environm Sci, Urumqi 830052, Peoples R China 4.Nanchang Univ, Ctr Watershed Ecol, Inst Life Sci, Nanchang 330031, Jiangxi, Peoples R China 5.Nanchang Univ, Minist Educ, Key Lab Poyang Lake Environm & Resource Utilizat, Nanchang 330031, Jiangxi, Peoples R China 6.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Lian,Cheng, Junhui,Li, Yawen,et al. N-enrichment induced biodiversity loss can be explained by reductions in competitive intransitivity: Evidence from a decade-long grassland experiment[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2021,184.
APA	Liu, Lian,Cheng, Junhui,Li, Yawen,Lan, Zhichun,&Bai, Yongfei.(2021).N-enrichment induced biodiversity loss can be explained by reductions in competitive intransitivity: Evidence from a decade-long grassland experiment.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,184.
MLA	Liu, Lian,et al."N-enrichment induced biodiversity loss can be explained by reductions in competitive intransitivity: Evidence from a decade-long grassland experiment".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 184(2021).

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