Grazing exclusion alters carbon flux of alpine meadow in the Tibetan Plateau
文献类型：期刊论文
| 作者 | Du, Chenjun1,6; Zhou, Guoying3; Gao, Yongheng2,4,5 |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 314页码:14 |
| ISSN号 | 0168-1923 |
| 关键词 | Fencing Respiration Ecological stoichiometry Q(10) Tibetan Plateau |
| DOI | 10.1016/j.agrformet.2021.108774 |
| 通讯作者 | Gao, Yongheng(gaoyh@cib.cas.cn) |
| 英文摘要 | Grasslands contain a large global pool of soil organic carbon (C), but the carbon flux in response to grazing exclusion and the affecting factors are still under debate. In this study, a manipulative experiment was conducted in alpine meadow of the eastern Tibetan Plateau. The sites were: 9 years grazing exclusion, GE9; 5 years grazing exclusion, GE5; and free grazing, FG in degraded alpine meadow. Results showed that there had been a significant increase in soil respiration (SR) and net ecosystem exchange (NEE) with fencing duration. However, no significant difference of ecosystem respiration (ER) was found between grazing and fencing sites. Though, carbon sink occurred in all three sites during the growing season, only the site for 9 years fencing increased gross ecosystem productivity (GEP). Remarkably, temperature sensitivity (Q(10)) of both soil and ecosystem respiration raised in GE5 but declined in GE9. These findings indicated that grazing exclusion could be a promising measure to CO2 sequestration in alpine meadow. Of the governing factors, exponential relationships among SR, ER and soil temperature and significant relationships among NEE, GEP and plant biomass were found. Besides, our results showed that plant nitrogen (N), phosphorus (P) content exhibited significant effects on SR, NEE, respectively. While soil C and N were significant explanatory factors for ER. These results indicated that C, N, and P content of plant and soil could provide a new insight for understanding carbon flux in alpine meadow. Together, the findings are not only vital to improve understanding of C cycle in grasslands, but also to provide scientific data for assessing the ecological effect and carbon budget of grazing exclusion. |
| WOS关键词 | ORGANIC-MATTER DECOMPOSITION ; SOIL RESPIRATION ; TEMPERATURE SENSITIVITY ; ECOSYSTEM RESPIRATION ; CLIMATE-CHANGE ; ELEMENTAL STOICHIOMETRY ; TERRESTRIAL ECOSYSTEMS ; INNER-MONGOLIA ; DIOXIDE FLUXES ; NO IMPACT |
| 资助项目 | Science and Technology Program of Qinghai Province of China[2019-HZ-807] ; Science and Technology Program of Qinghai Province of China[2019-ZJ-910] ; Key Research and Development Program of Sichuan Province of China[2018NZ0048] ; National Key Research and Development Program of China[2016YFC0501802] |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000819806600002 |
| 资助机构 | Science and Technology Program of Qinghai Province of China ; Key Research and Development Program of Sichuan Province of China ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/180747]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Gao, Yongheng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Peoples R China 4.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China 5.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Chenjun,Zhou, Guoying,Gao, Yongheng. Grazing exclusion alters carbon flux of alpine meadow in the Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2022,314:14. |
| APA | Du, Chenjun,Zhou, Guoying,&Gao, Yongheng.(2022).Grazing exclusion alters carbon flux of alpine meadow in the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,314,14. |
| MLA | Du, Chenjun,et al."Grazing exclusion alters carbon flux of alpine meadow in the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 314(2022):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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