Impact of Drought Stress on Net CO_2 Exchange above an Alpine Grassland Ecosystem in the Central Tibetan Plateau
文献类型：期刊论文
| 作者 | Zhao Yuping; Zhang Xianzhou ; Shi Peili; Wang Jingsheng; Wu Jianshuang
|
| 刊名 | Journal of Resources and Ecology
 |
| 出版日期 | 2013 |
| 卷号 | 4期号:4页码:327 |
| 关键词 | 净生态系统CO_2交换量 高寒草地生态系统 干旱 青藏高原 |
| ISSN号 | 1674-764X |
| 英文摘要 | Drought may impact the net ecosystem exchange of CO_2 (NEE) between grassland ecosystems and the atmosphere during growth seasons. Here, carbon dioxide exchange and controlling factors in alpine grassland under drought stress in the hinterland of Tibetan Plateau (Damxung, Tibet, China) were investigated. Data were obtained using the covariance eddy technique in 2009. Severe drought stress appeared in the early growing season (May to early July) and September. Drought conditions during the early growing season limited grass production and the green leaf area index (GLAI) increased slowly, with an obvious decline in June. When encountering severe water stress, diurnal patterns of NEE in the growth season altered with a peak carbon release around 16:00 h or a second carbon uptake period before sunset. NEE variations in daytime related most closely with θ other than PAR when daily averaged θ Ta>θ, GLAI>θ>PPT, and Ta>GLAI>PAR. Seasonality of GLAI explained 60.7% and 76.1% of seasonal variation in NEE and GPP, respectively. GPP or NEE was more sensitive than Reco to variation in GLAI, and ecosystem water conditions. |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/152243]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | Institute of Geographic Sciences and Natural Resources Research, CAS |
| 推荐引用方式 GB/T 7714 | Zhao Yuping,Zhang Xianzhou,Shi Peili,et al. Impact of Drought Stress on Net CO_2 Exchange above an Alpine Grassland Ecosystem in the Central Tibetan Plateau[J]. Journal of Resources and Ecology,2013,4(4):327. |
| APA | Zhao Yuping,Zhang Xianzhou,Shi Peili,Wang Jingsheng,&Wu Jianshuang.(2013).Impact of Drought Stress on Net CO_2 Exchange above an Alpine Grassland Ecosystem in the Central Tibetan Plateau.Journal of Resources and Ecology,4(4),327. |
| MLA | Zhao Yuping,et al."Impact of Drought Stress on Net CO_2 Exchange above an Alpine Grassland Ecosystem in the Central Tibetan Plateau".Journal of Resources and Ecology 4.4(2013):327. |
入库方式： OAI收割
来源：地理科学与资源研究所
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