Phase-Asymmetric Thermal Sensitivity Amplifies Respiration Hysteresis in Heatwaves
文献类型：期刊论文
| 作者 | Ping, Jiaye2; Xia, Jianyang2; Niu, Shuli3; Luo, Yiqi1 |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2026-01-13 |
| 卷号 | 32期号:1页码:e70691 |
| 关键词 | asymmetric response ecosystem respiration heatwave Q10 seasonal timing temperature thresholds thermal hysteresis |
| ISSN号 | 1354-1013 |
| DOI | 10.1111/gcb.70691 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Understanding how extreme climate events reshape the temperature response of ecosystem respiration (Re) is critical for predicting carbon-climate feedbacks. Here, we combine observational data and land surface model simulations to investigate Re responses to heatwaves, focusing on temperature sensitivity (Q 10) and thermal hysteresis. We develop a quantitative framework capturing hysteresis via temperature thresholds, their seasonal timing, and phase-specific Q 10 indices (Q 10,I, warming phase; Q 10,II, cooling phase). Flux-tower observations from the 2003 and 2018 heatwaves showed widespread amplification of thermal hysteresis in comparison with years without heatwaves. This amplification was primarily driven by asymmetric shifts in thermal sensitivity, especially a dominant decline in Q 10,II. The response of ecosystem respiration after summer is the most affected in years that have experienced strong heatwaves at most sites. Q 10,II retains strong associations with the timing of optimal temperature (r = 0.55), whereas Q 10,I becomes largely decoupled. Principal component analysis further confirms this divergence, with the two phase-specific sensitivities varying along orthogonal axes under heatwaves. We further analyzed individual sites to see how much each Q 10 phase contributed to the overall change in temperature sensitivity. Across sites, the temperature sensitivity of respiration in the post-heatwave phase accounts for an average of 71% of the total phase-specific Q 10 change induced by heatwaves. This reinforces the central role of Q 10,II in amplifying thermal hysteresis. Structural equation modeling shows that the heatwave-amplified thermal hysteresis in Re is fully mediated by Q 10,II decline, shaped by both thermal thresholds and their seasonal timing. These findings reveal a phase-asymmetric temperature sensitivity of Re that underpins thermal hysteresis, suggesting that short-term heatwaves could trigger prolonged carbon losses even under post-peak warming scenarios. |
| URL标识 | 查看原文 |
| WOS关键词 | NET ECOSYSTEM EXCHANGE ; SOIL RESPIRATION ; TEMPERATURE SENSITIVITY ; CLIMATE EXTREMES ; LEAF RESPIRATION ; HEAT WAVES ; CARBON ; PHOTOSYNTHESIS ; ACCLIMATION ; PATTERNS |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001661312900001 |
| 出版者 | WILEY |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219627]  |
| 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 | Xia, Jianyang |
| 作者单位 | 1.Cornell Univ, Coll Agr & Life Sci, Sch Integrat Plant Sci, Ithaca, NY USA 2.East China Normal Univ, Inst Ecochongming, Res Ctr Global Change & Ecol Forecasting, Sch Ecol & Environm Sci,Zhejiang Tiantong Forest E, Shanghai, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Ping, Jiaye,Xia, Jianyang,Niu, Shuli,et al. Phase-Asymmetric Thermal Sensitivity Amplifies Respiration Hysteresis in Heatwaves[J]. GLOBAL CHANGE BIOLOGY,2026,32(1):e70691. |
| APA | Ping, Jiaye,Xia, Jianyang,Niu, Shuli,&Luo, Yiqi.(2026).Phase-Asymmetric Thermal Sensitivity Amplifies Respiration Hysteresis in Heatwaves.GLOBAL CHANGE BIOLOGY,32(1),e70691. |
| MLA | Ping, Jiaye,et al."Phase-Asymmetric Thermal Sensitivity Amplifies Respiration Hysteresis in Heatwaves".GLOBAL CHANGE BIOLOGY 32.1(2026):e70691. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。