干旱区生态环境知识资源中心(Arid): PLANT COMMUNITY COMPOSITION ALTERED BY LONG-TERM NITROGEN ADDITION HAS MINOR CONTRIBUTION TO PLANT NUTRIENT STATUS AT THE COMMUNITY LEVEL

Arid

DOI	10.15666/aeer/1805_64696484
	PLANT COMMUNITY COMPOSITION ALTERED BY LONG-TERM NITROGEN ADDITION HAS MINOR CONTRIBUTION TO PLANT NUTRIENT STATUS AT THE COMMUNITY LEVEL
	Su, Y.; Le, J. J.; Ma, X. F.; Li, K. H.; Gong, Y. M.; Ahmed, Z.; Han, W. X.; Liu, X. J.
通讯作者	Li, KH ; Liu, XJ
来源期刊	APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
ISSN	1589-1623
EISSN	1785-0037
出版年	2020
卷号	18 期号:5 页码:6469-6484
英文摘要	Short-term nitrogen (N) deposition has exhibited great impacts on plant internal nutrient cycling in forest, grassland and desert ecosystems. However, the responses of plant nutrient status to chronic N deposition are not well understood, especially in alpine grasslands limited by soil N availability. This study used an N addition experiment that had been implemented since 2009 in the Tianshan mountains, northwest China, to investigate the effects of N addition at five levels (0, 1, 3, 9 and 15 g N m(-2) year(-1)) on the leaf nutrient concentrations and stoichiometric ratios of dominant perennial grasses (Leymus tianschanicus, Festuca ovina, Agropyron cristatum and Koeleria cristata) and forbs (Potentilla anserina and Potentilla bifurca) at the species, functional group and community levels. The results showed that increasing N addition significantly enhanced soil available N concentrations and soil available N:P ratios but had no detectable impacts on soil available phosphorus (P) concentrations. Nitrogen addition significantly reduced forb relative biomass, ranging from 13% in control plots versus 2% in the highest N addition plots. Furthermore, N addition increased the foliar N concentrations and N:P ratios for all the species, decreased foliar P concentrations for grasses, and had no significant effects on P concentrations in forbs. Plant carbon (C) concentrations remained relatively stable, resulting in reduced C:N as N addition increased. In contrast, N addition consistently increased leaf N concentrations, C:P and N:P and decreased leaf P concentrations and C:N at the community level. Regression analysis showed that soil available N and N:P ratios, rather than soil available P, were key parameters controlling plant N and P concentrations and stoichiometric ratios. Foliar N and P concentrations showed divergent responses to long-term N addition at the species and community levels, which implied that plant N and P cycling decoupled under N deposition. Grasses were more sensitive to N addition than forbs, resulting in significantly altered plant community composition. These findings are important for understanding plant nutrient allocation strategies and how plants adapt to environmental changes, such as N deposition in alpine ecosystems.
英文关键词	aboveground biomass alpine grassland community composition ecological stoichiometry nutrient cycling nitrogen addition
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000585225100027
WOS关键词	N-P RATIOS ; PHOSPHORUS STOICHIOMETRY ; LEAF NITROGEN ; RESORPTION ; RESPONSES ; WATER ; LIMITATION ; DEPOSITION ; ENRICHMENT ; GRASSLAND
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327274
作者单位	[Su, Y.; Le, J. J.; Ma, X. F.; Li, K. H.; Gong, Y. M.; Han, W. X.; Liu, X. J.] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Su, Y.; Le, J. J.; Li, K. H.; Gong, Y. M.] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Bayinbuluk Grassland Ecosyst Res Stn, Bayinbuluk 841314, Peoples R China; [Su, Y.; Le, J. J.; Ma, X. F.] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, K. H.] CAS Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China; [Ahmed, Z.] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Cele Natl Stn Observat & Res Desert Grassland Eco, Urumqi 848300, Xinjiang, Peoples R China; [Han, W. X.; Liu, X. J.] China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Beijing 100193, Peoples R China
推荐引用方式 GB/T 7714	Su, Y.,Le, J. J.,Ma, X. F.,et al. PLANT COMMUNITY COMPOSITION ALTERED BY LONG-TERM NITROGEN ADDITION HAS MINOR CONTRIBUTION TO PLANT NUTRIENT STATUS AT THE COMMUNITY LEVEL[J]. 中国科学院新疆生态与地理研究所, 中国农业大学,2020,18(5):6469-6484.
APA	Su, Y..,Le, J. J..,Ma, X. F..,Li, K. H..,Gong, Y. M..,...&Liu, X. J..(2020).PLANT COMMUNITY COMPOSITION ALTERED BY LONG-TERM NITROGEN ADDITION HAS MINOR CONTRIBUTION TO PLANT NUTRIENT STATUS AT THE COMMUNITY LEVEL.APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH,18(5),6469-6484.
MLA	Su, Y.,et al."PLANT COMMUNITY COMPOSITION ALTERED BY LONG-TERM NITROGEN ADDITION HAS MINOR CONTRIBUTION TO PLANT NUTRIENT STATUS AT THE COMMUNITY LEVEL".APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 18.5(2020):6469-6484.