YIC-IR  > 中科院海岸带环境过程与生态修复重点实验室
Ecosystem photosynthesis regulates soil respiration on a diurnal scale with a short-term time lag in a coastal wetland
Han, Guangxuan1; Luo, Yiqi2; Li, Dejun2; Xia, Jianyang2; Xing, Qinghui1; Yu, Junbao1
Source PublicationSOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
2014
Volume68Pages:85-94
KeywordSoil Respiration Ecosystem Photosynthesis Eddy Covariance Sunny And Cloudy Days Coastal Wetland Yellow River Delta
Contribution Rank[Han, Guangxuan; Xing, Qinghui; Yu, Junbao] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China; [Luo, Yiqi; Li, Dejun; Xia, Jianyang] Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
Corresponding AuthorYu, JB (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China. gxhan@yic.ac.cn ; jbyu@yic.ac.cn
AbstractAlthough increasing evidence has provided that soil respiration is strongly related to recent canopy photosynthesis, doubts remain as to the extent to which primary productivity controls soil respiratory and the speed of the link between soil respiration and photosynthesis. Based on the automated measurements of soil respiration and eddy covariance measurements of ecosystem photosynthesis (i.e. gross primary production, GPP) in a coastal wetland, we assessed the speed of link between ecosystem photosynthesis and soil respiration on the diurnal scale, and quantified the control of the ecosystem primary production on diurnal soil respiration. On the diurnal scale, the time of daily peak soil respiration lagged GPP but preceded soil temperature on both sunny and cloudy days. Daytime soil respiration was significantly linearly correlated with GPP with a lag of 1.5 h on sunny days and 1 h on cloudy days, respectively. By taking advantage of the natural shift of sunny and cloudy days without disturbance to the plant-soil system, our results also indicated that the changes in soil temperature and GPP together explained 53% of the changes in daytime soil respiration rates between sunny days and adjacent cloudy days. Under the same soil temperature, changes in soil respiration rates were strongly correlated with changes in GPP between sunny days and adjacent cloudy days. We therefore conclude that recent canopy photosynthesis regulates soil respiration on a diurnal scale with a short-term time lag. Thus, it is necessary to take into account the influence of photosynthesis on soil respiration in order to accurately simulate the magnitude and variation of soil respiration, especially at short and medium temporal scales. (C) 2013 Elsevier Ltd. All rights reserved.; Although increasing evidence has provided that soil respiration is strongly related to recent canopy photosynthesis, doubts remain as to the extent to which primary productivity controls soil respiratory and the speed of the link between soil respiration and photosynthesis. Based on the automated measurements of soil respiration and eddy covariance measurements of ecosystem photosynthesis (i.e. gross primary production, GPP) in a coastal wetland, we assessed the speed of link between ecosystem photosynthesis and soil respiration on the diurnal scale, and quantified the control of the ecosystem primary production on diurnal soil respiration. On the diurnal scale, the time of daily peak soil respiration lagged GPP but preceded soil temperature on both sunny and cloudy days. Daytime soil respiration was significantly linearly correlated with GPP with a lag of 1.5 h on sunny days and 1 h on cloudy days, respectively. By taking advantage of the natural shift of sunny and cloudy days without disturbance to the plant-soil system, our results also indicated that the changes in soil temperature and GPP together explained 53% of the changes in daytime soil respiration rates between sunny days and adjacent cloudy days. Under the same soil temperature, changes in soil respiration rates were strongly correlated with changes in GPP between sunny days and adjacent cloudy days. We therefore conclude that recent canopy photosynthesis regulates soil respiration on a diurnal scale with a short-term time lag. Thus, it is necessary to take into account the influence of photosynthesis on soil respiration in order to accurately simulate the magnitude and variation of soil respiration, especially at short and medium temporal scales. (C) 2013 Elsevier Ltd. All rights reserved.
SubtypeArticle
Funding OrganizationNational Natural Science Foundation of China [41301083]; National Science and Technology Support Program of China [2011BAC02B01]; Chinese Academy of Sciences [KZCX2-YW-223]
Indexed BySCI
Language英语
WOS KeywordYELLOW-RIVER DELTA ; PHRAGMITES-AUSTRALIS ; RHIZOSPHERE RESPIRATION ; ENVIRONMENTAL CONTROLS ; TREE PHOTOSYNTHESIS ; ROOT RESPIRATION ; CO2 EFFLUX ; CARBON ; FOREST ; TEMPERATURE
WOS Research AreaAgriculture
WOS IDWOS:000329536200012
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/6917
Collection中科院海岸带环境过程与生态修复重点实验室
中科院海岸带环境过程与生态修复重点实验室_滨海湿地实验室
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China
2.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
Recommended Citation
GB/T 7714
Han, Guangxuan,Luo, Yiqi,Li, Dejun,et al. Ecosystem photosynthesis regulates soil respiration on a diurnal scale with a short-term time lag in a coastal wetland[J]. SOIL BIOLOGY & BIOCHEMISTRY,2014,68:85-94.
APA Han, Guangxuan,Luo, Yiqi,Li, Dejun,Xia, Jianyang,Xing, Qinghui,&Yu, Junbao.(2014).Ecosystem photosynthesis regulates soil respiration on a diurnal scale with a short-term time lag in a coastal wetland.SOIL BIOLOGY & BIOCHEMISTRY,68,85-94.
MLA Han, Guangxuan,et al."Ecosystem photosynthesis regulates soil respiration on a diurnal scale with a short-term time lag in a coastal wetland".SOIL BIOLOGY & BIOCHEMISTRY 68(2014):85-94.
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