IB-CAS  > 植被与环境变化国家重点实验室
Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China
Sun, Hongru1; Zhou, Guangsheng2; Xu, Zhenzhu; Wang, Yuhui; Liu, Xiaodi1; Yu, Hongying1; Ma, Quanhui1; Jia, Bingrui
2020
Source PublicationCLIMATIC CHANGE
ISSN0165-0009
Volume160Issue:3Pages:373-384
AbstractSoil respiration universally exhibits exponential temperature dependence (Respiration = R-0 e(beta T) & Q(10) = e(10 beta)), and temperature sensitivity (Q(10)) and soil organic carbon quality (as expressed by basal respiration rate at 0 degrees C, R-0) are the key parameters. Despite their importance for predicting the responses of forest ecosystems to climate change and quantifying the magnitude of soil CO2 efflux, the controlling factors of temperature sensitivity and soil carbon quality and their relationships among various forest types at a regional scale are as yet unknown. Here, we present a comprehensive analysis of Q(10), R-0, and their related variables by assembling 154 independent temperature-respiration functions under a common standard in forest ecosystems across northeast China (41 degrees 51 '-51 degrees 24 ' N, 118 degrees 37 '-129 degrees 48 ' E). The R-0 values ranged from 0.1700 to 2.1194 mu mol m(-2) s(-1) (mean = 0.8357 mu mol m(-2) s(-1)), and the Q(10) values from 1.29 to 5.42 (mean = 2.72). The relationships between Q(10) and R-0 could be best expressed with exponential decay equations (R-2 = 0.460-0.611, P < 0.01). They indicated that the temperature sensitivity decreased with increasing the soil carbon quality, and then tended to level off when the R-0 values were larger than ~1 mu mol m(-2) s(-1). Soil carbon quality (R-0) was closely related with the minimum soil temperature and its corresponding soil respiration rate during the growing season (R-2 = 0.696-0.857, P < 0.01). Such a synthesis is necessary to fully understand the spatial heterogeneity in the temperature sensitivity of soil respiration and to increase our ability to make robust predictions about the future carbon budget.
KeywordSoil respiration Q(10) Basal respiration Carbon quality-temperature hypothesis Forest ecosystem China
Subject AreaEnvironmental Sciences ; Meteorology & Atmospheric Sciences
DOI10.1007/s10584-019-02650-z
Indexed BySCI
Language英语
WOS KeywordORGANIC-MATTER DECOMPOSITION ; CYCLE FEEDBACKS ; CLIMATE-CHANGE ; RESPIRATION ; Q(10) ; VARIABILITY ; PATTERNS ; FRACTIONS ; LOSSES ; MODEL
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS IDWOS:000538252000003
PublisherSPRINGER
SubtypeArticle
Publication PlaceDORDRECHT
EISSN1573-1480
Corresponding Author Emailjiabingrui@ibeas.ac.cn
OAGreen Submitted
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/21729
Collection植被与环境变化国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Sun, Hongru,Zhou, Guangsheng,Xu, Zhenzhu,et al. Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China[J]. CLIMATIC CHANGE,2020,160(3):373-384.
APA Sun, Hongru.,Zhou, Guangsheng.,Xu, Zhenzhu.,Wang, Yuhui.,Liu, Xiaodi.,...&Jia, Bingrui.(2020).Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China.CLIMATIC CHANGE,160(3),373-384.
MLA Sun, Hongru,et al."Temperature sensitivity increases with decreasing soil carbon quality in forest ecosystems across northeast China".CLIMATIC CHANGE 160.3(2020):373-384.
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