Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland
文献类型：期刊论文
| 作者 | Wang, Yonghui; Liu, Huiying; Chung, Haegeun2; Yu, Lingfei3; Mi, Zhaorong; Geng, Yan; Jing, Xin; Wang, Shiping5; Zeng, Hui6; Cao, Guangmin |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2014 |
| 卷号 | 28期号:10页码:1081-1095 |
| 关键词 | winter soil respiration carbon cycling alpine ecosystem soil freezing Tibetan Plateau |
| ISSN号 | 0886-6236 |
| DOI | 10.1002/2013GB004760 |
| 文献子类 | Article |
| 英文摘要 | The Tibetan alpine grasslands, sharing many features with arctic tundra ecosystems, have a unique non-growing-season climate that is usually dry and without persistent snow cover. Pronounced winter warming recently observed in this ecosystem may significantly alter the non-growing-season carbon cycle processes such as soil respiration (R-s), but detailed measurements to assess the patterns, drivers of, and potential feedbacks on R-s have not been made yet. We conducted a 4 year study on R-s using a unique R-s measuring system, composed of an automated soil CO2 flux sampling system and a custom-made container, to facilitate measurements in this extreme environment. We found that in the nongrowing season, (1) cumulative R-s was 82-89g C m(-2), accounting for 11.8-13.2% of the annual total R-s; (2) surface soil freezing controlled the diurnal pattern of R-s and bulk soil freezing induced lower reference respiration rate (R-0) and temperature sensitivity (Q(10)) than those in the growing season (0.40-0.53 versus 0.84-1.32 mu mol CO2 m(-2)s(-1) for R-0 and 2.5-2.9 versus 2.9-5.6 for Q(10)); and (3) the intraannual variation in cumulative R-s was controlled by accumulated surface soil temperature. We found that in the summer monsoon-dominated Tibetan alpine grassland, surface soil freezing, bulk soil freezing, and accumulated surface soil temperature are the day-, season-, and year-scale drivers of the non-growing-season R-s, respectively. Our results suggest that warmer winters can trigger carbon loss from this ecosystem because of higher Q(10) of thawed than frozen soils. |
| 学科主题 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 出版地 | WASHINGTON |
| 电子版国际标准刊号 | 1944-9224 |
| WOS关键词 | CO2 EFFLUX ; TEMPERATURE SENSITIVITY ; ECOSYSTEM RESPIRATION ; MICROBIAL ACTIVITY ; ARCTIC ECOSYSTEMS ; SOLAR-RADIATION ; NORTH-AMERICA ; FROZEN SOIL ; SNOW DEPTH ; WINTER |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000344797500005 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Basic Research Program of China [2010CB950602, 2014CB954004] ; National Natural Science Foundation of China [31025005, 31321061] ; Chinese Academy of Sciences [XDA05050404, XDB03030403, KZCX2-YW-JC404] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27043]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China 2.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China 3.Konkuk Univ, Dept Environm Engn, Seoul, South Korea 4.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China 5.Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, Northwest Inst Plateau Biol, Xining, Peoples R China 6.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing, Peoples R China 7.Peking Univ, Key Lab Urban Habitat Environm Sci & Technol, Shenzhen Grad Sch, Shenzhen, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yonghui,Liu, Huiying,Chung, Haegeun,et al. Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2014,28(10):1081-1095. |
| APA | Wang, Yonghui.,Liu, Huiying.,Chung, Haegeun.,Yu, Lingfei.,Mi, Zhaorong.,...&He, Jin-Sheng.(2014).Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland.GLOBAL BIOGEOCHEMICAL CYCLES,28(10),1081-1095. |
| MLA | Wang, Yonghui,et al."Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland".GLOBAL BIOGEOCHEMICAL CYCLES 28.10(2014):1081-1095. |
入库方式： OAI收割
来源：植物研究所
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