干旱区生态环境知识资源中心(Arid): Plant response to N availability in permafrost-affected alpine wetlands in arid and semi-arid climate zones

Arid

DOI	10.1016/j.scitotenv.2020.137791
	Plant response to N availability in permafrost-affected alpine wetlands in arid and semi-arid climate zones
	Metrak, Monika; Pokarowski, Piotr; Sulwinski, Marcin; Gantumur, Altantsetseg; Suska-Malawska, Malgorzata
通讯作者	Suska-Malawska, M
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	721
英文摘要	Nutrient cycling in alpine permafrost-affected wetlands remains insufficiently studied, as it is influenced by a complex network of interrelated climatic and environmental factors, at both regional and local scale. Therefore, we applied mathematical models to examine relationship between environmental factors and plant functional traits reflecting N availability in wetland communities developed under locally variable conditions in a geographic and climatic gradient of high-altitude habitats. Moreover, we assessed impact of local differences in soil chemistry on plant fractionation of N isotopes as a response to N availability. Based on environmental data and chemistry of biomass from 192 study sites from the Pamir Mountains (Tajikistan) and Khangai and Khentei Mountains (Mongolia), a matrix of rank correlations was prepared for regional and local factors and community level plant functional traits. For the traits that were highly correlated either with regional or with local drivers (that is plant N:P ratio and plant delta N-15), linear models were built, with a limited set of predictors selected according to the Risk Inflation Criterion and the SOS algorithm. The models were fitted for each of the studied regions. Presented regional models indicated significant influence of soil NH4+ and/or PO43- content on plant N:P ratio, which showed increase with altitude and lowering precipitation. Thus, its values clearly distinguished between the Pamir Mountains (high N:P) and the Mongolian ranges (low N:P). Models for plant delta N-15 showed its strong positive correlations with soil delta N-15 and soil salinity. Average values of plant delta N-15 were comparable for both study areas. The studied plant functional traits showed different response to regional and local drivers. Plant N:P ratio was controlled by regional drivers via their influence on soil NH4+ content. Contrastingly, plant delta N-15 was significantly affected by local factors, namely soil delta N-15 and soil salinity expressed as Na:EC. (C) 2020 The Authors. Published by Elsevier B.V.
英文关键词	Nitrogen Stable isotopes Plants Central Asia
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000535467800001
WOS关键词	N-15 NATURAL-ABUNDANCE ; NUTRIENT LIMITATION ; NITROGEN UPTAKE ; SOIL-MOISTURE ; LEAF-N ; CARBON ; PHOSPHORUS ; DELTA-N-15 ; STOICHIOMETRY ; PRODUCTIVITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324533
作者单位	[Metrak, Monika; Sulwinski, Marcin; Gantumur, Altantsetseg; Suska-Malawska, Malgorzata] Univ Warsaw, Fac Biol, Biol & Chem Res Ctr, Zwirki & Wigury 101, PL-02089 Warsaw, Poland; [Pokarowski, Piotr] Univ Warsaw, Fac Math Informat & Mech, Banacha 2, PL-02097 Warsaw, Poland
推荐引用方式 GB/T 7714	Metrak, Monika,Pokarowski, Piotr,Sulwinski, Marcin,et al. Plant response to N availability in permafrost-affected alpine wetlands in arid and semi-arid climate zones[J],2020,721.
APA	Metrak, Monika,Pokarowski, Piotr,Sulwinski, Marcin,Gantumur, Altantsetseg,&Suska-Malawska, Malgorzata.(2020).Plant response to N availability in permafrost-affected alpine wetlands in arid and semi-arid climate zones.SCIENCE OF THE TOTAL ENVIRONMENT,721.
MLA	Metrak, Monika,et al."Plant response to N availability in permafrost-affected alpine wetlands in arid and semi-arid climate zones".SCIENCE OF THE TOTAL ENVIRONMENT 721(2020).