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Divergent responses of photosynthesis and respiration underlie the nonlinear response of carbon use efficiency to temperature in sub-frigid forest in China

文献类型：期刊论文

作者Lei, Qiongwei2; Kang, Xiaoyan1,4; Li, Mingxu1,4; He, Nianpeng2,3,4
刊名JOURNAL OF PLANT ECOLOGY
出版日期2026-02-01
卷号19期号:1页码:rtaf162
关键词sub-frigid zone forest ecosystems carbon use efficiency global climate warming (sic)(sic)(sic) (sic)(sic)(sic)(sic)(sic)(sic) (sic)(sic)(sic)(sic)(sic) (sic)(sic)(sic)(sic)
ISSN号1752-9921
DOI10.1093/jpe/rtaf162
产权排序2
文献子类Article
英文摘要Forest ecosystems in the sub-frigid zone play a crucial role in the global carbon cycle and exhibit distinct responses to climate change. The carbon use efficiency (CUE) of vegetation serves as a critical indicator for assessing the carbon sequestration potential of an ecosystem. Previous studies have predominantly examined long-term trends in CUE under climate change; therefore, the mechanisms governing responses to short-term climate variability remain poorly understood. In this study, we investigated monthly spatiotemporal variations in vegetation CUE in sub-frigid zone ecosystems and elucidated its mechanistic responses to climate warming. The results demonstrated a regional mean CUE of 0.80 (+/- 0.04), which was significantly higher than values reported for other ecosystem types. CUE exhibited a bimodal temporal distribution, with peaks occurring in April and September, coupled with a distinct west-to-east spatial gradient characterized by relatively high values in the western regions. The CUE-temperature relationship conformed to a quadratic function, where CUE initially increased with increasing temperature, attained an optimum temperature threshold (TMPopt), and subsequently decreased. This pattern arose from the different temperature response rates between plant respiration and gross primary production. Precipitation emerged as the dominant controller of TMPopt variability, with TMPopt demonstrating significant quadratic dependence on precipitation. This study advances our understanding of the impacts of climate change on carbon cycling of the sub-frigid zone, providing a mechanistic framework for refining global carbon cycle models and adopting strategies for mitigating climate change. The vegetation carbon use efficiency (CUE) of sub-frigid forests in China exhibits a distinct bimodal seasonal pattern. Its response to temperature follows a quadratic trend-increasing and then decreasing-driven by the differing sensitivities of photosynthesis and respiration to temperature changes. (sic)(sic):(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)(sic)(sic) (CUE)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)CUE(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)CUE(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)CUE(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic):1)(sic)(sic)(sic)(sic)CUE(sic)0.80(+/- 0.04), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).2)CUE(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), 4(sic)(sic)9(sic)(sic)(sic)(sic)(sic);(sic)(sic)(sic)(sic)(sic)(sic), CUE(sic)(sic)(sic)'(sic)(sic)(sic)(sic)'(sic)(sic)(sic).3)CUE(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic):(sic)(sic)(sic)(sic)(sic)(sic), CUE(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic) (TMPopt)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic) (GPP) (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic), (sic)(sic)(sic)(sic)TMPopt(sic)(sic)(sic), TMPopt(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)CUE-TMP(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic).
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WOS关键词CONSTANT FRACTION ; PERMAFROST ; GPP ; PHENOLOGY ; PATTERN ; SCALE ; NPP
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种英语
WOS记录号WOS:001703320900001
出版者OXFORD UNIV PRESS
源URL[http://ir.igsnrr.ac.cn/handle/311030/221355]  
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Kang, Xiaoyan; He, Nianpeng
作者单位1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China;
2.Northeast Forestry Univ, Inst Carbon Neutral, Harbin 150040, Peoples R China;
3.Northeast Forestry Univ, Key Lab Sustainable Forest Ecosyst Management, Minist Educ, Harbin 150040, Peoples R China
4.Chinese Acad Sci, Earth Crit Zone & Flux Res Stn Xingan Mt, Daxinganling 165200, Peoples R China;
推荐引用方式
GB/T 7714		 Lei, Qiongwei,Kang, Xiaoyan,Li, Mingxu,et al. Divergent responses of photosynthesis and respiration underlie the nonlinear response of carbon use efficiency to temperature in sub-frigid forest in China[J]. JOURNAL OF PLANT ECOLOGY,2026,19(1):rtaf162.
APA Lei, Qiongwei,Kang, Xiaoyan,Li, Mingxu,&He, Nianpeng.(2026).Divergent responses of photosynthesis and respiration underlie the nonlinear response of carbon use efficiency to temperature in sub-frigid forest in China.JOURNAL OF PLANT ECOLOGY,19(1),rtaf162.
MLA Lei, Qiongwei,et al."Divergent responses of photosynthesis and respiration underlie the nonlinear response of carbon use efficiency to temperature in sub-frigid forest in China".JOURNAL OF PLANT ECOLOGY 19.1(2026):rtaf162.

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