IMHE OpenIR  > 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, Zhaoyong1; Wang, Genxu1; Sun, Xiangyang1; Wang, Jian3; Chen, Xiaopeng1; Song, Chunlin1,2; Song, Xiaoyan1,2; Lin, Shan1,2
Corresponding AuthorWang, Genxu(wanggx@imde.ac.cn)
2019-04-15
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
Volume268Pages:32-39
AbstractBelowground 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.
KeywordAutotrophic respiration Heterotrophic respiration Carbon use strategy
DOI10.1016/j.agrformet.2019.01.005
Indexed BySCI
WOS KeywordSOIL CO2 EFFLUX ; USE EFFICIENCY ; MICROBIAL BIOMASS ; TEMPERATURE SENSITIVITY ; ROOT RESPIRATION ; FOREST ; COMPONENTS ; DECOMPOSITION ; PRODUCTIVITY ; RHIZOSPHERE
Language英语
Funding ProjectChinese Academy of Sciences[QYZDJ-SSW-DQC006] ; National Natural Science Foundation of China[41790431] ; National Natural Science Foundation of China[41401044]
WOS Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:000460844700004
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25298
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorWang, Genxu
Affiliation1.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
Recommended Citation
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.
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