Intra-annual species gain overrides species loss in determining species richness in a typical steppe ecosystem after a decade of nitrogen enrichment

doi:10.1111/1365-2745.13928

	Intra-annual species gain overrides species loss in determining species richness in a typical steppe ecosystem after a decade of nitrogen enrichment
	Zhao, Ming 1; Zhang, Hongxiang 2; Baskin, Carol C.; Wei, Cunzheng ; Yang, Junjie ; Zhang, Yunhai; Jiang, Yong 5; Jiang, Lin 6; Han, Xingguo1
	2022
发表期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
卷号	110 期号:8 页码:1942-1956
摘要	Increasing deposition of atmospheric nitrogen (N) due to accelerated human activities is a threat to various ecosystems. However, there is a lack of long-term experimental evidence demonstrating the seasonal dynamics of plant species turnover that ultimately determines species richness in natural ecosystems under N enrichment. Moreover, the frequency of N addition also may affect species turnover in a community, but it is rarely studied. To assess the responses of a plant community to N addition, we manipulated the amounts (0-50 g N m(-2) year(-1)) and frequency (2 vs. 12 times year(-1)) of N addition in an Inner Mongolian typical steppe ecosystem in northern China for 12 consecutive years (2008-2020). We measured species richness and density of plant in the growing seasons (May-September) from 2018 to 2020, starting 10 years after the initial N addition treatment. Both species gain and species loss decreased with increasing amounts of N addition, resulting in a lower plant species turnover rate and greater similarity in the community between two adjacent months throughout the growing season. Species loss and species gain increased modestly under high N addition frequency. Species gain was more important than species loss in determining species richness after a decade of N application. In addition, plant density increased at high N amounts, mainly driven by enhanced clonal growth of the dominant species, Leymus chinensis. Synthesis. Together, these results suggest that high levels of N deposition may suppress species richness due to aggravated soil chemical properties and may favour growth of a limited number of N-tolerant species compared to systems that experience low levels of N deposition. To conserve biodivewwrsity and to facilitate restoration of degraded grassland ecosystems exposed to long-term N deposition, amelioration of the acidified soils induced by N deposition may be an important strategy to use.
关键词	biodiversity community dynamics determinants of plant community diversity nitrogen addition frequency nitrogen deposition plant density soil acidification species turnover
学科领域	Plant Sciences ; Ecology
DOI	10.1111/1365-2745.13928
收录类别	SCI
语种	英语
WOS关键词	NUTRIENT ENRICHMENT ; BIODIVERSITY LOSS ; PLANT DIVERSITY ; GRASSLAND ; ESTABLISHMENT ; SUCCESSION ; DEPOSITION ; GERMINATION ; RECRUITMENT ; COMPETITION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000806090600001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2745
资助机构	National Science Foundation of China [42130515]
作者邮箱	xghan@ibcas.ac.cn
引用统计	被引频次：8[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/2S10CLM1/28536
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, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun, Peoples R China 4.Baskin, Carol C.] Univ Kentucky, Dept Biol, Lexington, KY USA 5.Baskin, Carol C.] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY USA 6.Hebei Univ, Sch Life Sci, Baoding, Peoples R China 7.Georgia Inst Technol, Sch Biol Sci, Atlanta, GA 30332 USA
推荐引用方式 GB/T 7714	Zhao, Ming,Zhang, Hongxiang,Baskin, Carol C.,et al. Intra-annual species gain overrides species loss in determining species richness in a typical steppe ecosystem after a decade of nitrogen enrichment[J]. JOURNAL OF ECOLOGY,2022,110(8):1942-1956.
APA	Zhao, Ming.,Zhang, Hongxiang.,Baskin, Carol C..,Wei, Cunzheng.,Yang, Junjie.,...&Han, Xingguo.(2022).Intra-annual species gain overrides species loss in determining species richness in a typical steppe ecosystem after a decade of nitrogen enrichment.JOURNAL OF ECOLOGY,110(8),1942-1956.
MLA	Zhao, Ming,et al."Intra-annual species gain overrides species loss in determining species richness in a typical steppe ecosystem after a decade of nitrogen enrichment".JOURNAL OF ECOLOGY 110.8(2022):1942-1956.

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