Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis

doi:10.1016/j.foreco.2021.119384

	Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis
	Wang, Zhiqiang 1; Huang, Heng 2; Yao, Buqing 3,4; Deng, Jianming 5; Ma, Zeqing 6,7; Niklas, Karl J.8
刊名	FOREST ECOLOGY AND MANAGEMENT
	2021-09-01
卷号	495 页码:8
关键词	Fine roots Nitrogen Phosphorus Scaling exponents Scaling theory Woody species
ISSN号	0378-1127
DOI	10.1016/j.foreco.2021.119384
通讯作者	Wang, Zhiqiang(wangzhiqiang@cdu.edu.cn) ; Ma, Zeqing(mazq@igsnrr.ac.cn)
英文摘要	Fine-root nitrogen (N) and phosphorus (P) concentrations play an important role in driving ecological processes such as nutrient cycling in terrestrial ecosystems. Previous studies have demonstrated that the N versus P scaling relationship for fine roots (<2 mm in diameter) on average follows a 0.82-power law across plant functional groups and ecosystems. However, little is known about the N versus P scaling relationships for different fine-root classification groups (classes of diameters, branch orders, and functional categories, e.g., absorptive and transport roots). We used a dataset comprising 1037 N-P paired observations for a total of 227 woody species to explore N versus P scaling relationships in different fine-root groups. The overall means of fine-root N and P concentrations and N:P ratios across all of the woody species were 12.27 mg g-1, 1.01 mg g-1, and 15.14, respectively. N and P concentrations, N:P ratios, and the numerical values of the N versus P scaling exponents differed significantly within and across the different fine-root classes. The numerical values of absorptive roots N versus P scaling exponents varied within plant functional groups (e.g., life-form, phylogenetic and mycorrhizal groups). The numerical values of absorptive roots scaling exponents declined from 0.89 in boreal regions to 0.61 tropical regions. These results indicate that fine roots (<2 mm in diameter) should be carefully classified into different groups/categories when N and P scaling relationships need to be determined to predict plant growth and vegetation productivity. Our results shed important light on attempts to modeling fine-root biogeochemical processes in terrestrial ecosystems.
资助项目	National Natural Science Foundation of China[31822010] ; Natural Science Foundation of Qinghai Province of China[2020-ZJ-925] ; National Key Research and Development Program of China[2016YFC0501903] ; Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China[2019HJ2096001006] ; National Scientific and Technological Program on Basic Resources Investigation[2019FY102002] ; Innovation Base Project of Gansu Province[20190323]
WOS关键词	N-P STOICHIOMETRY ; LEAF NITROGEN ; BIOLOGICAL STOICHIOMETRY ; PLANT ; GROWTH ; TEMPERATE ; ARCHITECTURE ; LIMITATION ; ALLOCATION ; WORLDWIDE
WOS研究方向	Forestry
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000660297700004
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Qinghai Province of China ; National Key Research and Development Program of China ; Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China ; National Scientific and Technological Program on Basic Resources Investigation ; Innovation Base Project of Gansu Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164124]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Zhiqiang; Ma, Zeqing
作者单位	1.Chengdu Univ, Inst Adv Study, Chengdu 610106, Sichuan, Peoples R China 2.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Cold Reg Restorat Ecol, Xining 810008, Qinghai, Peoples R China 4.Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 5.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Ctr Forest Ecosyst Studies, Beijing 100101, Peoples R China 7.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Stn, Beijing 100101, Peoples R China 8.Cornell Univ, Sch Integrat Plant Sci, Plant Biol Sect, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Wang, Zhiqiang,Huang, Heng,Yao, Buqing,et al. Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis[J]. FOREST ECOLOGY AND MANAGEMENT,2021,495:8.
APA	Wang, Zhiqiang,Huang, Heng,Yao, Buqing,Deng, Jianming,Ma, Zeqing,&Niklas, Karl J..(2021).Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis.FOREST ECOLOGY AND MANAGEMENT,495,8.
MLA	Wang, Zhiqiang,et al."Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis".FOREST ECOLOGY AND MANAGEMENT 495(2021):8.