Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14530 |
Modelled net carbon gain responses to climate change in boreal trees: Impacts of photosynthetic parameter selection and acclimation | |
Stinziano, Joseph R.1,2; Bauerle, William L.2; Way, Danielle A.1,3 | |
2019-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:4页码:1445-1465 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | Boreal forests are crucial in regulating global vegetation-atmosphere feedbacks, but the impact of climate change on boreal tree carbon fluxes is still unclear. Given the sensitivity of global vegetation models to photosynthetic and respiration parameters, we determined how predictions of net carbon gain (C-gain) respond to variation in these parameters using a stand-level model (MAESTRA). We also modelled how thermal acclimation of photosynthetic and respiratory temperature sensitivity alters predicted net C-gain responses to climate change. We modelled net C-gain of seven common boreal tree species under eight climate scenarios across a latitudinal gradient to capture a range of seasonal temperature conditions. Physiological parameter values were taken from the literature together with different approaches for thermally acclimating photosynthesis and respiration. At high latitudes, net C-gain was stimulated up to 400% by elevated temperatures and CO2 in the autumn but suppressed at the lowest latitudes during midsummer under climate scenarios that included warming. Modelled net C-gain was more sensitive to photosynthetic capacity parameters (V-cmax, J(max), Arrhenius temperature response parameters, and the ratio of J(max) to V-cmax) than stomatal conductance or respiration parameters. The effect of photosynthetic thermal acclimation depended on the temperatures where it was applied: acclimation reduced net C-gain by 10%-15% within the temperature range where the equations were derived but decreased net C-gain by 175% at temperatures outside this range. Thermal acclimation of respiration had small, but positive, impacts on net C-gain. We show that model simulations are highly sensitive to variation in photosynthetic parameters and highlight the need to better understand the mechanisms and drivers underlying this variability (e.g., whether variability is environmentally and/or biologically driven) for further model improvement. |
英文关键词 | carbon cycle J(max) modelling seasonality thermal acclimation V-cmax |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461817500019 |
WOS关键词 | PLANT FUNCTIONAL TYPES ; ELEVATED ATMOSPHERIC CO2 ; NORWAY SPRUCE ; TEMPERATURE RESPONSE ; PICEA-ABIES ; SCOTS PINE ; STOMATAL CONDUCTANCE ; THERMAL-ACCLIMATION ; LEAF RESPIRATION ; GLOBAL VARIABILITY |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17471 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Western Ontario, Dept Biol, London, ON, Canada; 2.Colorado State Univ, Dept Hort & Landscape Architecture, Ft Collins, CO 80523 USA; 3.Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA |
推荐引用方式 GB/T 7714 | Stinziano, Joseph R.,Bauerle, William L.,Way, Danielle A.. Modelled net carbon gain responses to climate change in boreal trees: Impacts of photosynthetic parameter selection and acclimation[J]. GLOBAL CHANGE BIOLOGY,2019,25(4):1445-1465. |
APA | Stinziano, Joseph R.,Bauerle, William L.,&Way, Danielle A..(2019).Modelled net carbon gain responses to climate change in boreal trees: Impacts of photosynthetic parameter selection and acclimation.GLOBAL CHANGE BIOLOGY,25(4),1445-1465. |
MLA | Stinziano, Joseph R.,et al."Modelled net carbon gain responses to climate change in boreal trees: Impacts of photosynthetic parameter selection and acclimation".GLOBAL CHANGE BIOLOGY 25.4(2019):1445-1465. |
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