Probing for climate change stressors in managed Jack Pine stands: Implications for forestry and forest management

Domtar是北美最大的无涂层铜版纸销售商和制造商，也是世界第二大无涂层铜版纸制造商。 该公司依靠木纤维生产纸浆和纸制品。它还生产木材，并参与森林资源的管理。在可持续森林管理方面存在不确定性的一个领域是，采伐和后续造林会如何影响水的供应和使用，从而影响树木的生长，特别是在气候变化的情况下，而树木是未来的木材供应。因此，解决这一领域关键不确定性的研究对Domtar提高生产和可持续森林管理的成本效益很有价值。在这个项目中，我们将结合联合收割机树木年轮分析（从断面积增量的增长率）与碳同位素为基础的水分利用效率分析，以研究如何在短叶松林下不同的管理历史，包括气候变化的各种压力的反应。综合这些分析所获得的信息可以帮助（1）核实扰动历史，（2）确定松树对不同强度和持续时间的扰动的反应，（3）确定森林是否可能直接受到气候胁迫（水，温度）或如果可能存在一些其他应激源，以及（4）为未来管理提出建议，以提高气候变化情景下的生产力。

Domtar is the largest marketer and manufacturer of uncoated freesheet paper in North America and second largest in the world. The business relies on wood fibre to produce its' pulp and paper products. It also produces lumber and is involved in the management of forest resources. An area of uncertainty in sustainable forest management is how harvesting and follow-up silviculture might affect water availability and use and therefore the growth of trees, particularly in the face of climate change, that are the future supply of wood. Research that addresses key uncertainties in this area would thus be valuable to Domtar to improve cost-effectiveness in production and in sustainable forest management. In this project we will combine tree-ring analysis (growth rates from basal area increments) with carbon isotope based water use efficiency analysis to examine how trees in jack pine stands under different management history respond to various stressors including climate change. The information gained from a combination of these analyses can help (1) verify perturbation history, (2) establish the response of pine trees to different intensities and duration of perturbation, (3) identify whether forests are likely to be stressed directly by climate (water, temperature) or if some other stressor may be present and (4) present recommendations for future management to increase productivity under climate change scenarios.