Contribution of soil respiration to the global carbon equation
Xu, M; Shang, H
2016
Source PublicationJOURNAL OF PLANT PHYSIOLOGY
ISSN0176-1617
Volume203Pages:16-28
AbstractSoil respiration (Rs) is the second largest carbon flux next to GPP between the terrestrial ecosystem (the largest organic carbon pool) and the atmosphere at a global scale. Given their critical role in the global carbon cycle, Rs measurement and modeling issues have been well reviewed in previous studies. In this paper, we briefly review advances in soil organic carbon (SOC) decomposition processes and the factors affecting Rs. We examine the spatial and temporal distribution of Rs measurements available in the literature and found that most of the measurements were conducted in North America, Europe, and East Asia, with major gaps in Africa, East Europe, North Asia, Southeast Asia, and Australia, especially in dry ecosystems. We discuss the potential problems of measuring Rs on slope soils and propose using obliquely-cut soil collars to solve the existing problems. We synthesize previous estimates of global Rs flux and find that the estimates ranged from 50 PgC/yr to 98 PgC/yr and the error associated with each estimation was also high (4 PgC/yr to 33.2 PgC/yr). Using a newly integrated database of Rs measurements and the MODIS vegetation map, we estimate that the global annual Rs flux is 94.3 PgC/yr with an estimation error of 17.9 PgC/yr at a 95% confidence level. The uneven distribution of Rs measurements limits our ability to improve the accuracy of estimation. Based on the global estimation of Rs flux, we found that Rs is highly correlated with GPP and NPP at the biome level, highlighting the role of Rs in global carbon budgets. (C) 2016 Published by Elsevier GmbH.
SubtypeJournal
KeywordSoil microbial decomposition Soil respiration measurement Soil respiration model Global annual soil respiration Belowground carbon allocation
Subject AreaPlant Sciences
WOS Subject ExtendedPlant Sciences
WOS KeywordORGANIC-MATTER DECOMPOSITION ; PONDEROSA PINE PLANTATION ; DYNAMIC CLOSED-CHAMBER ; ARCTIC TUNDRA SOILS ; CO2 EFFLUX ; MICROBIAL DIVERSITY ; FOREST SOIL ; RHIZOSPHERE RESPIRATION ; TEMPERATURE SENSITIVITY ; CLIMATE-CHANGE
Indexed BySCI
Language英语
WOS IDWOS:000385038100003
PublisherELSEVIER GMBH, URBAN & FISCHER VERLAG
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44184
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Xu, M,Shang, H. Contribution of soil respiration to the global carbon equation[J]. JOURNAL OF PLANT PHYSIOLOGY,2016,203:16-28.
APA Xu, M,&Shang, H.(2016).Contribution of soil respiration to the global carbon equation.JOURNAL OF PLANT PHYSIOLOGY,203,16-28.
MLA Xu, M,et al."Contribution of soil respiration to the global carbon equation".JOURNAL OF PLANT PHYSIOLOGY 203(2016):16-28.
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