Nitrogen deposition differentially regulates the sensitivity of gross primary productivity to extreme drought versus wetness
文献类型：期刊论文
| 作者 | Peng, Jinlong2,4; Ma, Fangfang2,4; Quan, Quan2,4; Liao, Jiaqiang2,4; Chen, Chen2,4; Wang, Yiheng2,4; Tang, Jiwang2,4; Sun, Chuanlian4,5; Zhou, Qingping1,3; Niu, Shuli2,3,4 |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 30期号:7页码:e17428 |
| 关键词 | carbon climate extremes ecosystem functional trait nitrogen water |
| DOI | 10.1111/gcb.17428 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Global hydroclimatic variability is increasing with more frequent extreme dry and wet years, severely destabilizing terrestrial ecosystem productivity. However, what regulates the consequence of precipitation extremes on productivity remains unclear. Based on a 9-year field manipulation experiment on the Qinghai-Tibetan Plateau, we found that the responses of gross primary productivity (GPP) to extreme drought and wetness were differentially regulated by nitrogen (N) deposition. Over increasing N deposition, extreme dry events reduced GPP more. Among the 12 biotic and abiotic factors examined, this was mostly explained by the increased plant canopy height and proportion of drought-sensitive species under N deposition, making photosynthesis more sensitive to hydraulic stress. While extreme wet events increased GPP, their effect did not shift over N deposition. These site observations were complemented by a global synthesis derived from the GOSIF GPP dataset, which showed that GPP sensitivity to extreme drought was larger in ecosystems with higher N deposition, but GPP sensitivity to extreme wetness did not change with N deposition. Our findings indicate that intensified hydroclimatic variability would lead to a greater loss of land carbon sinks in the context of increasing N deposition, due to that GPP losses during extreme dry years are more pronounced, yet without a synchronous increase in GPP gains during extreme wet years. The study implies that the conservation and management against climate extremes merit particular attention in ecosystems subject to N deposition. Global hydroclimatic variability is intensifying, with more frequent extreme dry and wet years severely destabilizing terrestrial ecosystem productivity, but what regulates this consequence remains unclear. Combining a field experiment with a global synthesis, we found that over increasing N deposition, extreme dry events reduced productivity more. While extreme wet events increased productivity, their effect did not shift over N deposition. Consequently, the enhanced hydroclimatic variability will increasingly reduce productivity as N deposition increases once extreme drought reduces productivity more than extreme wetness induced an increase in productivity. These findings have important implications for ecosystem conservation and management against climate extremes.image |
| WOS关键词 | PLANT DIVERSITY ; RESPONSES ; PRECIPITATION ; BIODIVERSITY ; LIMITATION ; WATER ; COMPETITION ; ECOSYSTEMS ; NUTRIENTS |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| WOS记录号 | WOS:001270429400001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/206075]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Southwest Univ Nationalities, Inst Qinghai Tibetan Plateau, Chengdu, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 3.Southwest Minzu Univ, Sichuan Zoige Alpine Wetland Ecosyst Natl Observ, Chengdu 610041, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Jinlong,Ma, Fangfang,Quan, Quan,et al. Nitrogen deposition differentially regulates the sensitivity of gross primary productivity to extreme drought versus wetness[J]. GLOBAL CHANGE BIOLOGY,2024,30(7):e17428. |
| APA | Peng, Jinlong.,Ma, Fangfang.,Quan, Quan.,Liao, Jiaqiang.,Chen, Chen.,...&Niu, Shuli.(2024).Nitrogen deposition differentially regulates the sensitivity of gross primary productivity to extreme drought versus wetness.GLOBAL CHANGE BIOLOGY,30(7),e17428. |
| MLA | Peng, Jinlong,et al."Nitrogen deposition differentially regulates the sensitivity of gross primary productivity to extreme drought versus wetness".GLOBAL CHANGE BIOLOGY 30.7(2024):e17428. |
入库方式： OAI收割
来源：地理科学与资源研究所
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