Variations in belowground carbon use strategies under different climatic conditions

doi:10.1016/j.agrformet.2019.01.005

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Variations in belowground carbon use strategies under different climatic conditions
	Hu, Zhaoyong 1; Wang, Genxu1 ; Sun, Xiangyang1 ; Wang, Jian3 ; Chen, Xiaopeng 1; Song, Chunlin1,2 ; Song, Xiaoyan 1,2; Lin, Shan 1,2
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2019-04-15
卷号	268 页码:32-39
关键词	Autotrophic respiration Heterotrophic respiration Carbon use strategy
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2019.01.005
通讯作者	Wang, Genxu(wanggx@imde.ac.cn)
英文摘要	Belowground carbon is important to the terrestrial carbon cycle, and altitudinal gradients in mountainous areas provide natural experiment sites for analysing the carbon cycle under different climatic conditions. Therefore, to better understand belowground carbon use strategies under different climatic conditions, we quantified soil respiration (R-s) and its components (heterotrophic respiration (R-H) and autotrophic respiration (R-A)) and evaluated the belowground carbon use efficiency (CUE) at 8 sites along an altitudinal gradient (from 2017 to 3665 m asl) during the wet season (May to October) in 2015 and 2016. The results showed that the rates of R-s, R-H, and R-A and the ratios of R-H to R-s were all negatively correlated with elevation. The contribution of R-H to R-s was larger than that of R-A, ranging from to 66% to 86%. Soil temperature had a stronger relationship with R(H )than R-A, although we note that the latter was not measured directly in this study. The microbial CUE tended to decrease from the mid-elevation sites to the lower- and higher-elevation sites. The root CUE exhibited an increasing trend from the mid-elevation site to the higher-elevation sites. These results suggest that (1) when considering changes in R-s values in response to changes in soil temperature, the dominant contributor is R-H, not R-A ; (2) from the areas with moderate temperature and precipitation to the high temperature and low precipitation areas, more belowground carbon (both organic and root carbon) tend to be consumed, whereas more root carbon tend to be retained from the moderate climatic areas to the low temperature and high precipitation areas.
资助项目	Chinese Academy of Sciences[QYZDJ-SSW-DQC006] ; National Natural Science Foundation of China[41790431] ; National Natural Science Foundation of China[41401044]
WOS关键词	SOIL CO2 EFFLUX ; USE EFFICIENCY ; MICROBIAL BIOMASS ; TEMPERATURE SENSITIVITY ; ROOT RESPIRATION ; FOREST ; COMPONENTS ; DECOMPOSITION ; PRODUCTIVITY ; RHIZOSPHERE
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000460844700004
资助机构	Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/25298]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wang, Genxu
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, 9,Block 4,Renminnan Rd, Chengdu 610041, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China West Normal Univ, Land & Resource Coll, Nanchong 637002, Peoples R China
推荐引用方式 GB/T 7714	Hu, Zhaoyong,Wang, Genxu,Sun, Xiangyang,et al. Variations in belowground carbon use strategies under different climatic conditions[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019,268:32-39.
APA	Hu, Zhaoyong.,Wang, Genxu.,Sun, Xiangyang.,Wang, Jian.,Chen, Xiaopeng.,...&Lin, Shan.(2019).Variations in belowground carbon use strategies under different climatic conditions.AGRICULTURAL AND FOREST METEOROLOGY,268,32-39.
MLA	Hu, Zhaoyong,et al."Variations in belowground carbon use strategies under different climatic conditions".AGRICULTURAL AND FOREST METEOROLOGY 268(2019):32-39.