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Joint control of terrestrial gross primary productivity by plant phenology and physiology
文献类型：SCI/SSCI论文
| 作者 | Xia J. Y.; Niu, S. L.; Ciais, P.; Janssens, I. A.; Chen, J. Q.; Ammann, C.; Arain, A.; Blanken, P. D.; Cescatti, A.; Bonal, D. |
| 发表日期 | 2015 |
| 关键词 | ecosystem carbon uptake growing season length photosynthetic capacity spatiotemporal variability climate extreme climate-change chlorophyll fluorescence ecosystem productivity vegetation phenology stomatal conductance forest phenology carbon uptake models photosynthesis variability |
| 英文摘要 | Terrestrial gross primary productivity (GPP) varies greatly over time and space. A better understanding of this variability is necessary for more accurate predictions of the future climate-carbon cycle feedback. Recent studies have suggested that variability in GPP is driven by a broad range of biotic and abiotic factors operating mainly through changes in vegetation phenology and physiological processes. However, it is still unclear how plant phenology and physiology can be integrated to explain the spatiotemporal variability of terrestrial GPP. Based on analyses of eddy-covariance and satellite-derived data, we decomposed annual terrestrial GPP into the length of the CO2 uptake period (CUP) and the seasonal maximal capacity of CO2 uptake (GPP(max)). The product of CUP and GPP(max) explained > 90% of the temporal GPP variability in most areas of North America during 2000-2010 and the spatial GPP variation among globally distributed eddy flux tower sites. It also explained GPP response to the European heatwave in 2003 (r(2) = 0.90) and GPP recovery after a fire disturbance in South Dakota (r(2) = 0.88). Additional analysis of the eddy-covariance flux data shows that the interbiome variation in annual GPP is better explained by that in GPP(max) than CUP. These findings indicate that terrestrial GPP is jointly controlled by ecosystem-level plant phenology and photosynthetic capacity, and greater understanding of GPP(max) and CUP responses to environmental and biological variations will, thus, improve predictions of GPP over time and space. |
| 出处 | Proceedings of the National Academy of Sciences of the United States of America |
| 卷 | 112 |
| 期 | 9 |
| 页 | 2788-2793 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0027-8424 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38956]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xia J. Y.,Niu, S. L.,Ciais, P.,et al. Joint control of terrestrial gross primary productivity by plant phenology and physiology. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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