Contextualized response of carbon-use efficiency to warming at the plant and ecosystem levels
文献类型：期刊论文
| 作者 | Quan, Quan; Ma, Fangfang; Wang, Jinsong; Tian, Dashuan; Zhou, Qingping; Niu, Shuli |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-08-10 |
| 卷号 | 885页码:163777 |
| 关键词 | Carbon -use eff iciency Climate warming Autotrophic respiration Heterotrophic respiration Carbon flux |
| ISSN号 | 1879-1026 |
| DOI | 10.1016/j.scitotenv.2023.163777 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Carbon-use efficiency (CUE) has been widely used as a constant value in many earth system models to simulate how assimilated C is partitioned in ecosystems, to estimate ecosystem C budgets, and investigate C feedbacks to climate warming. Although correlative relationships from previous studies indicated that CUE could vary with temperature, and relying on a fixed CUE value could cause large uncertainty in model projections, however, due to the lack of manipulative experiment, it remains unclear how CUE at the plant (CUEp) and ecosystem (CUEe) levels respond to warming. Based on a 7-year manipulative warming experiment in an alpine meadow ecosystem on the QinghaiTibet Plateau, we quantitatively distinguished various C flux components of CUE, including gross ecosystem productivity, net primary productivity, net ecosystem productivity, ecosystem respiration, plant autotrophic respiration, and microbial heterotrophic respiration and explored how CUE at different levels responded to climate warming. We found large variations in both CUEp (0.60 to 0.77) and CUEe (from 0.38 to 0.59). The warming effect on CUEp was positively correlated with ambient soil water content (SWC) and the warming effect on CUEe was negatively correlated with ambient soil temperature (ST), but was positively correlated with warming-induced changes in ST. We also found that the direction and magnitude of the warming effects on different CUE components scaled differently with changes in the background environment, which explained the variation in CUE's warming response under environmental changes. Our new insights have important implications for reducing modelling uncertainty of ecosystem C budgets and improving our ability to predict ecosystem C-climate feedbacks under climate warming. |
| 学科主题 | Environmental Sciences & Ecology |
| WOS关键词 | TIBETAN PLATEAU ; RESPIRATION ; NITROGEN ; PHOTOSYNTHESIS ; PRODUCTIVITY ; STRATEGIES ; GRADIENT ; FRACTION ; PATTERN |
| WOS研究方向 | Environmental Sciences & Ecology |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/193815]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Chinese Academy of Sciences 2.University of Chinese Academy of Sciences, CAS 3.Institute of Geographic Sciences & Natural Resources Research, CAS 4.Southwest Minzu University |
| 推荐引用方式 GB/T 7714 | Quan, Quan,Ma, Fangfang,Wang, Jinsong,et al. Contextualized response of carbon-use efficiency to warming at the plant and ecosystem levels[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,885:163777. |
| APA | Quan, Quan,Ma, Fangfang,Wang, Jinsong,Tian, Dashuan,Zhou, Qingping,&Niu, Shuli.(2023).Contextualized response of carbon-use efficiency to warming at the plant and ecosystem levels.SCIENCE OF THE TOTAL ENVIRONMENT,885,163777. |
| MLA | Quan, Quan,et al."Contextualized response of carbon-use efficiency to warming at the plant and ecosystem levels".SCIENCE OF THE TOTAL ENVIRONMENT 885(2023):163777. |
入库方式： OAI收割
来源：地理科学与资源研究所
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