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Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements

文献类型：期刊论文

作者Han, Guangxuan; Sun, Baoyu; Chu, Xiaojing; Xing, Qinghui; Song, Weimin; Xia, Jianyang
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2018-06-15
卷号256页码:292-303
关键词Soil respiration Soil moisture Precipitation events Coastal wetland The Yellow River Delta
ISSN号0168-1923
DOI10.1016/j.agrformet.2018.03.018
产权排序[Han, Guangxuan ; Sun, Baoyu ; Chu, Xiaojing ; Xing, Qinghui ; Song, Weimin] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Shandong, Peoples R China ; [Han, Guangxuan ; Chu, Xiaojing ; Xing, Qinghui] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; [Sun, Baoyu ; Xia, Jianyang] East China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China
文献子类Article
英文摘要Coastal wetlands are considered as a significant sink for global carbon because their organic-rich soils. Given exposed to shallow water tables, water from groundwater is transported upward to the root zone through capillary rise, thus soil moisture in coastal wetlands is relatively high even when there is no precipitation. We expected that as precipitation occurred, the soils in coastal wetlands might become quickly saturated and lead to the development of anoxic conditions. We further hypothesized that such anoxic conditions might decrease soil respiration by limiting oxygen availability and biological activities of roots and microorganisms. Based on continuous automated soil respiration data collected in a coastal wetland in the Yellow River Delta over 4 years (2012-2015), the results showed that on the annual scale, cumulative soil respiration was 317, 321, 231, and 274 g C m(-2) yr(-1) for 2012, 2013, 2014, and 2015, respectively, with an average of 286 g C m(-2) yr(-1). The rate of soil respiration increased exponentially with soil temperature during each year and its two seasons (growing season and non-growing season). In addition, soil respiration was significantly related to soil moisture during the growing season, but was not affected by soil moisture during the non-growing season. After each precipitation event, soil respiration was significantly negatively correlated with soil moisture under different initial soil water contents. There was a significant positive correlation between changes in soil respiration and changes in soil moisture following precipitation events. Moreover, the increase of soil moisture following precipitation events changed the temperature response of soil respiration. Our study indicated that precipitation events could decrease soil respiration by increasing soil moisture and inducing anoxic conditions in the coastal wetland. Therefore, we speculate that the continuation of decreasing precipitation and increasing temperature trends in the Yellow River Delta may increase soil carbon losses in the coastal wetland due to the increase in soil respiration.
WOS关键词GREENHOUSE-GAS EMISSIONS ; YELLOW-RIVER DELTA ; CARBON-DIOXIDE EFFLUX ; TROPICAL RAIN-FOREST ; LABORATORY EXPERIMENT ; FLOODPLAIN WETLAND ; MICROBIAL BIOMASS ; NORTHEAST CHINA ; SALINE WETLAND ; CH4 EMISSIONS
WOS研究方向Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000437060700026
资助机构National Nature Science Foundation of China [41671089] ; Science and Technology Service Network Initiative [KFJ-EW-STS-127]
源URL[http://ir.yic.ac.cn/handle/133337/24449]  
专题烟台海岸带研究所_近岸生态与环境实验室
烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Shandong, Peoples R China;
2.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
推荐引用方式
GB/T 7714		 Han, Guangxuan,Sun, Baoyu,Chu, Xiaojing,et al. Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements[J]. AGRICULTURAL AND FOREST METEOROLOGY,2018,256:292-303.
APA Han, Guangxuan,Sun, Baoyu,Chu, Xiaojing,Xing, Qinghui,Song, Weimin,&Xia, Jianyang.(2018).Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements.AGRICULTURAL AND FOREST METEOROLOGY,256,292-303.
MLA Han, Guangxuan,et al."Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements".AGRICULTURAL AND FOREST METEOROLOGY 256(2018):292-303.

入库方式： OAI收割

来源：烟台海岸带研究所

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