Integrating acclimation capacity of tree species into assessments of climate change impacts on Canada's boreal forest productivity**

2015年，加拿大的林业价值超过327亿美元，依赖于生产性森林，但气候变化可能会危及该行业的可持续性和森林提供的生态系统服务。气候变化，包括二氧化碳浓度和温度的上升，在高纬度地区将是最大的，预计到2100年，北方森林将升温10 °C。最近的气候变化增加了加拿大某些地区的北方树木的生长，但抑制了其他地区的树木生长或导致死亡。加拿大林业局的任务是提供科学和政策专门知识，并就国家森林部门问题提供咨询意见，因此，了解加拿大北方森林生产力和碳动态方面这些区域对策的驱动因素尤为紧迫。了解二氧化碳和气温上升将如何影响加拿大的北方森林，特别是未来的碳动态将如何应对未来气候变化，这一点至关重要，因为它直接影响到加拿大履行国际气候协定承诺的能力。如果北方树种对变暖和CO2浓度升高的反应各不相同，那么北方森林对气候变化反应的差异可能是由于树种对气候变化反应的差异。该项目将确定CO2和温度升高如何影响各种北方树种的生产力，以确定森林生长和碳吸收的变化在多大程度上取决于应对气候变化的物种水平变化。我们的研究结果将被CFS用于预测不同树种的生产力和碳动态将如何受到气候变化的影响。粮安委将利用这些预测指导公共政策，为加拿大高纬度森林的减缓、适应和森林管理战略提供信息，并为加拿大管理的森林未来碳动态估计提供信息，以满足加拿大的国际报告要求。****

Canada's forestry industry, worth over $32.7 billion in 2015, depends on productive forests, yet the**sustainability of this industry and the ecosystem services forests provide could be jeopardized by climate change. Climate change, including rising CO2 concentrations and temperatures, will be greatest at high latitudes, with warming of up to 10 °C predicted by the year 2100 in the boreal forest. Recent climate change has increased boreal tree growth in some parts of Canada, but suppressed tree growth or caused mortality in others. Understanding what drives these regional responses in forest productivity and carbon dynamics in northern Canada is particularly pressing for the Canadian Forest Service (CFS), whose mandate is to provide science and policy expertise, and advice on national forest sector issues. Understanding how rising CO2 and temperature will influence Canada's boreal forest, in particular how future carbon dynamics will respond to a changing future climate, is critical because it directly influences Canada's ability to meet international climate agreement commitments. If responses to warming and elevated CO2 vary among northern tree species, these differences in boreal forest responses to climate change may be due to variation in how tree species respond to climate change. This project will determine how elevated CO2 and temperatures affect the productivity of a diverse range of boreal tree species to determine the extent to which variation in forest growth and carbon uptake is determined by species-level variation in response to climate change. Our findings will be used by CFS to predict how the productivity and carbon dynamics of different tree species will be affected by climate change. These predictions will be used by CFS to guide public policy by informing mitigation, adaptation and forest management strategies for high latitude forests in Canada and inform estimates of future carbon dynamics of Canada's managed forest to meet Canada's international reporting requirements. ****