Disentangling species and functional group richness effects on soil N cycling in a grassland ecosystem

doi:10.1111/gcb.13757

ISWC OpenIR > 水保所科研产出--SCI > 2017--SCI

	Disentangling species and functional group richness effects on soil N cycling in a grassland ecosystem
	Wei, Xiaorong 1,2; Reich, Peter B.2,3; Hobbie, Sarah E.4; Kazanski, Clare E.4; Wei, XR (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China.; Reich, PB (reprint author), Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA.
文章类型	Article
	2017
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
通讯作者邮箱	xrwei78@163.com ; preich@umn.edu
卷号	23 期号:11 页码:4717-4727
摘要	Species richness (SR) and functional group richness (FGR) are often confounded in both observational and experimental field studies of biodiversity and ecosystem function. This precludes discernment of their separate influences on ecosystem processes, including nitrogen (N) cycling, and how those influences might be moderated by global change factors. In a 17-year field study of grassland species, we used two full factorial experiments to independently vary SR (one or four species, with FGR=1) and FGR (1-4 groups, with SR=4) to assess SR and FGR effects on ecosystem N cycling and its response to elevated carbon dioxide (CO2) and N addition. We hypothesized that increased plant diversity (either SR or FGR) and elevated CO2 would enhance plant N pools because of greater plant N uptake, but decrease soil N cycling rates because of greater soil carbon inputs and microbial N immobilization. In partial support of these hypotheses, increasing SR or FGR (holding the other constant) enhanced total plant N pools and decreased soil nitrate pools, largely through higher root biomass, and increasing FGR strongly reduced mineralization rates, because of lower root N concentrations. In contrast, increasing SR (holding FGR constant and despite increasing total plant C and N pools) did not alter root N concentrations or net N mineralization rates. Elevated CO2 had minimal effects on plant and soil N metrics and their responses to plant diversity, whereas enriched N increased plant and soil N pools, but not soil N fluxes. These results show that functional diversity had additional effects on both plant N pools and rates of soil N cycling that were independent of those of species richness.
关键词	Co2 Elevation n Enrichment Net n Mineralization Plant Diversity Plant n Pools Soil Inorganic n Pools
学科领域	Biodiversity & Conservation ; Environmental Sciences & Ecology
DOI	10.1111/gcb.13757
URL	查看原文
收录类别	SCI
出版地	HOBOKEN
语种	英语
WOS记录号	WOS:000412322700023
出版者	WILEY
项目资助者	U.S. National Science Foundation [DEB-9411972, DEB-0080382, DEB-062065, DEB-12341622]; Biocomplexity Coupled Biogeochemical Cycles [DEB-0322057]; Long-Term Research in Environmental Biology [DEB-0716587, DEB-1242531]; Ecosystem Sciences [NSF DEB-1120064]; US Department of Energy [DE-FG02-96ER62291]; National Institute for Climatic Change Research [DE-FC02-06ER64158] ; U.S. National Science Foundation [DEB-9411972, DEB-0080382, DEB-062065, DEB-12341622]; Biocomplexity Coupled Biogeochemical Cycles [DEB-0322057]; Long-Term Research in Environmental Biology [DEB-0716587, DEB-1242531]; Ecosystem Sciences [NSF DEB-1120064]; US Department of Energy [DE-FG02-96ER62291]; National Institute for Climatic Change Research [DE-FC02-06ER64158]
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7896
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Wei, XR (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China.; Reich, PB (reprint author), Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA.
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China 2.Univ Minnesota, Dept Forest Resources, St Paul, MN 55108 USA 3.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia 4.Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA
推荐引用方式 GB/T 7714	Wei, Xiaorong,Reich, Peter B.,Hobbie, Sarah E.,et al. Disentangling species and functional group richness effects on soil N cycling in a grassland ecosystem[J]. GLOBAL CHANGE BIOLOGY,2017,23(11):4717-4727.
APA	Wei, Xiaorong,Reich, Peter B.,Hobbie, Sarah E.,Kazanski, Clare E.,Wei, XR ,&Reich, PB .(2017).Disentangling species and functional group richness effects on soil N cycling in a grassland ecosystem.GLOBAL CHANGE BIOLOGY,23(11),4717-4727.
MLA	Wei, Xiaorong,et al."Disentangling species and functional group richness effects on soil N cycling in a grassland ecosystem".GLOBAL CHANGE BIOLOGY 23.11(2017):4717-4727.