Net primary productivity and rain-use efficiency as affected by warming, altered precipitation, and clipping in a mixed-grass prairie
文献类型：SCI/SSCI论文
| 作者 | Xu X. ; Sherry R. A. ; Niu S. L. ; Li D. J. ; Luo Y. Q. |
| 发表日期 | 2013 |
| 关键词 | above- and belowground net primary productivity climate change clipping mixed-grass prairie net primary productivity partitioning rain-use efficiency terrestrial carbon-cycle below-ground processes biomass allocation tallgrass prairie united-states inner-mongolia plant-growth nitrogen mineralization doubled precipitation temporal variation |
| 英文摘要 | Grassland productivity in response to climate change and land use is a global concern. In order to explore the effects of climate change and land use on net primary productivity (NPP), NPP partitioning [f(BNPP), defined as the fraction of belowground NPP (BNPP) to NPP], and rain-use efficiency (RUE) of NPP, we conducted a field experiment with warming (+3 degrees C), altered precipitation (double and half), and annual clipping in a mixed-grass prairie in Oklahoma, USA since July, 2009. Across the years, warming significantly increased BNPP, f(BNPP), and RUEBNPP by an average of 11.6%, 2.8%, and 6.6%, respectively. This indicates that BNPP was more sensitive to warming than aboveground NPP (ANPP) since warming did not change ANPP and RUEANPP much. Double precipitation stimulated ANPP, BNPP, and NPP but suppressed RUEANPP, RUEBNPP, and RUENPP while half precipitation decreased ANPP, BNPP, and NPP but increased RUEANPP, RUEBNPP, and RUENPP. Clipping interacted with altered precipitation in impacting RUEANPP, RUEBNPP, and RUENPP, suggesting land use could confound the effects of precipitation changes on ecosystem processes. Soil moisture was found to be a main factor in regulating variation in ANPP, BNPP, and NPP while soil temperature was the dominant factor influencing f(BNPP). These findings suggest that BNPP is critical point to future research. Additionally, results from single-factor manipulative experiments should be treated with caution due to the non-additive interactive effects of warming with altered precipitation and land use (clipping). |
| 出处 | Global Change Biology |
| 卷 | 19 |
| 期 | 9 |
| 页 | 2753-2764 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1354-1013 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30132]  |
| 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 | Xu X.,Sherry R. A.,Niu S. L.,et al. Net primary productivity and rain-use efficiency as affected by warming, altered precipitation, and clipping in a mixed-grass prairie. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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