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Important interaction of chemicals, microbial biomass and dissolved substrates in the diel hysteresis loop of soil heterotrophic respiration
Wang, Qing1,2; He, Nianpeng2,3,4,5; Liu, Yuan2; Li, Meiling2; Xu, Li2; Zhou, Xuhui1
2018-07-01
Source PublicationPLANT AND SOIL
ISSN0032-079X
Volume428Issue:1-2Pages:279-290
Corresponding AuthorHe, Nianpeng(henp@igsnrr.ac.cn)
AbstractIncreasing the emission of carbon dioxide by heterotrophic respiration (R (h)) might lead to global warming. However, issues remain on how R (h) responds to changing temperatures, especially with respect to the hysteresis loop in the relationship between R (h) and temperature at the daily scale, along with elucidating the underlying mechanisms. We investigated hysteresis loop by measuring R (h) in subtropical forest soil at the daily scale (12 h for warm-up (6-30 A degrees C) and cool-down processes (30-6 A degrees C), respectively) using continuous temperature variation and high resolution of measurements over a 56-day incubation period. The ratios of R (20) and Q (10) between warm-up and cool-down were calculated as the characteristics of diel hysteresis. We measured chemical (pH, conductivity, oxidation-reduction potential), microbial biomass and dissolved substrate (carbon and nitrogen) parameters to explain variation of diel hysteresis. R (h) was strongly dependent on temperature, with a clockwise hysteresis loop of R (h) between the warm-up and cool-down daily processes. The average value of R (20) [at a reference temperature of 20 A degrees C] during the whole incubation period under the warm-up process was significantly higher (46.05 +/- 0.96 mu gC g(-1) d(-1)) than that under the cool-down process (14.74 +/- 0.03 mu gC g(-1) d(-1)). In comparison, the average value of Q (10) under the cool-down process (5.27 +/- 0.2) was significantly higher than that under the warm-up process (1.66 +/- 0.02). Redundancy analysis showed that the interaction effects of soil chemical, microbial biomass, and dissolved substrate parameters explain most variation of diel hysteresis: 98% variation in R (20) and 93.5% variation in Q (10). Compared with the weak effect of chemistry parameters on the diel hysteresis, the sole and interactive effects of microbial biomass and substrate were more important, especially their interaction. Interactions of chemical, microbial biomass, and dissolved substrate parameters dominated the variation in diel hysteresis of R (h) with temperature, especially the interaction of microbial biomass and dissolved substrate. Of note, Q (10) during the warm-up process might be overestimated when using the highly fitted temperature-dependent function of cool-down period. Furthermore, using a constant value of Q (10) (Q (10) = 2) in carbon cycle models might be an important source of uncertainty.
KeywordWarm-up Cool-down Substrate Microbial biomass Heterotrophic respiration
DOI10.1007/s11104-018-3644-3
WOS KeywordORGANIC-MATTER DECOMPOSITION ; TEMPERATURE SENSITIVITY ; CARBON DECOMPOSITION ; BACTERIAL COMMUNITIES ; DECIDUOUS FOREST ; NORTHERN JAPAN ; CHINA ; NITROGEN ; RESPONSES ; QUALITY
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0500102] ; National Natural Science Foundation of China[31770655] ; National Natural Science Foundation of China[41571130043]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000436129500018
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54670
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHe, Nianpeng
Affiliation1.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China
5.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China
Recommended Citation
GB/T 7714
Wang, Qing,He, Nianpeng,Liu, Yuan,et al. Important interaction of chemicals, microbial biomass and dissolved substrates in the diel hysteresis loop of soil heterotrophic respiration[J]. PLANT AND SOIL,2018,428(1-2):279-290.
APA Wang, Qing,He, Nianpeng,Liu, Yuan,Li, Meiling,Xu, Li,&Zhou, Xuhui.(2018).Important interaction of chemicals, microbial biomass and dissolved substrates in the diel hysteresis loop of soil heterotrophic respiration.PLANT AND SOIL,428(1-2),279-290.
MLA Wang, Qing,et al."Important interaction of chemicals, microbial biomass and dissolved substrates in the diel hysteresis loop of soil heterotrophic respiration".PLANT AND SOIL 428.1-2(2018):279-290.
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