Divergence of above- and belowground C and N pool within predominant plant species along two precipitation gradients in North China

doi:10.5194/bg-12-457-2015

	Divergence of above- and belowground C and N pool within predominant plant species along two precipitation gradients in North China
	Ye, X. H.; Pan, X.; Cornwell, W. K.; Gao, S. Q.; Dong, M.; Cornelissen, J. H. C.
	2015
发表期刊	BIOGEOSCIENCES
ISSN	1726-4170
卷号	12 期号:2 页码:457-465
摘要	The coupling of carbon cycle and nitrogen cycle drives the food web structure and biogeochemistry of an ecosystem. However, across precipitation gradients, there may be a shift in C pool and N pool from above-to belowground because of shifting plant stoichiometry and allocation. Based on previous evidence, biomass allocation to roots should increase with aridity, while leaf [N] should increase. If their effect sizes are equal, they should cancel each other out, and the above-and belowground proportions of the N would remain constant. Here, we present the first study to explicitly compare above-and belowground pool sizes of N and C within predominant plant species along precipitation gradients. Biomass and nutrient concentrations of leaves, stems and roots of three predominant species were measured along two major precipitation gradients in Inner Mongolia, China. Along the two gradients, the effect sizes of the biomass shifts were remarkably consistent among three predominant species. However, the size of the shift in aboveground [N] was not, leading to a species-specific pattern in above-and belowground pool size. In two species (Stipa grandis and Artemisia ordosica) the effect sizes of biomass allocation and [N] were equal and the proportion of N of above-and belowground did not change with aridity, but in S. bungeana the increase in leaf [N] with aridity was much weaker than the biomass shift, leading to a decrease in the proportion of N aboveground at dry sites. We have found examples of consistent N pool sizes above-and belowground and a shift to a greater proportion of belowground N in drier sites depending on the species. We suggest that precipitation gradients do potentially decouple the C and N pool, but the exact nature of the decoupling depends on the dominant species' capacity for intraspecific variation.
学科领域	Ecology ; Geosciences, Multidisciplinary
DOI	10.5194/bg-12-457-2015
收录类别	SCI
语种	英语
WOS关键词	METROSIDEROS-POLYMORPHA ; BIOMASS ALLOCATION ; FUNCTIONAL TRAITS ; NITROGEN-USE ; CARBON ; WATER ; VARIABILITY ; NUTRIENT ; CLIMATE ; SOIL
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000348982200013
出版者	COPERNICUS GESELLSCHAFT MBH
文献子类	Article
出版地	GOTTINGEN
EISSN	1726-4189
资助机构	Chinese Academy of Sciences (CAS) [XDA05050406] ; National Natural Science Foundation of China [30570296] ; Chinese Academy of Sciences [2010T2S24]
作者邮箱	dongming@ibcas.ac.cn
作品OA属性	Green Submitted, gold
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	http://ir.ibcas.ac.cn/handle/2S10CLM1/25811
专题	植被与环境变化国家重点实验室
作者单位	1.[Ye, X. H. 2.Pan, X. 3.Gao, S. Q. 4.Dong, M.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.[Cornwell, W. K. 6.Cornelissen, J. H. C.] Vrije Univ Amsterdam, Dept Ecol Sci, NL-1081 HV Amsterdam, Netherlands 7.[Dong, M.] Hangzhou Normal Univ, Coll Life & Environm Sci, Key Lab Hangzhou City Ecosyst Protect & Restorat, Hangzhou 310036, Zhejiang, Peoples R China 8.[Cornwell, W. K.] Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW, Australia 9.[Pan, X.] Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ye, X. H.,Pan, X.,Cornwell, W. K.,et al. Divergence of above- and belowground C and N pool within predominant plant species along two precipitation gradients in North China[J]. BIOGEOSCIENCES,2015,12(2):457-465.
APA	Ye, X. H.,Pan, X.,Cornwell, W. K.,Gao, S. Q.,Dong, M.,&Cornelissen, J. H. C..(2015).Divergence of above- and belowground C and N pool within predominant plant species along two precipitation gradients in North China.BIOGEOSCIENCES,12(2),457-465.
MLA	Ye, X. H.,et al."Divergence of above- and belowground C and N pool within predominant plant species along two precipitation gradients in North China".BIOGEOSCIENCES 12.2(2015):457-465.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Ye-2015-Divergence o（1333KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文