Climate change and water use: can increase diversity help protect forests?

气候变化和用水：增加多样性有助于保护森林吗？

• 批准号: 506724-2017
• 负责人: Paquette, Alain
• 金额: $ 12.6万
• 依托单位: Université du Québec à Montréal
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=661503
• 关键词: Climate; change; water; use; increase

This research project is strongly grounded on the needs expressed by our partners and by forest managers for predictions on the impacts of climate change on forests, and mitigation strategies to limit the expected mortality due to water stress and its effect of the productivity of Canadian forests. **Indeed, the research developed in this project will contribute significantly to mitigating the impacts of some of the most important threats to Canadian forests: decreasing diversity and maladaptation of tree species from failure to migrate, combined with increasing periods of drought due to changes in climate. **The main scientific objective of the project is to evaluate the often cited but poorly demonstrated hypothesis that forest diversity will buffer the negative impacts of water stress on productivity, especially mortality. This is a highly strategic hypothesis given the expected changes, and uncertainty, in precipitation from projected climate change in Canada. It will also be easily translated into adaptation strategies for both managed natural forests and tree plantations.**Furthermore, we will evaluate the size of the impact that increased mortality caused by the maladaptation of trees following climate change will have on forest productivity, which is largely unknown at this time, and not accounted for at present by managers and governments.**To do so, we use both an experimental approach, benefiting from our network of tree diversity experiments (IDENT), as well as an observational approach using data from permanent forest plots. The experimental approach will make use of a stable isotope (deuterium) to trace water uptake in trees, as well as remote sensing (drones) of leaf temperatures (thermal cameras) and canopy organization in space, to track water use and evapo-transpiration, in highly controlled tree diversity experiments that include water stress treatments. Observational analyses will benefit from our network of large permanent plots in Québec, as well as the Global Forest Biodiversity initiative, encompassing over 1 million forest plots across all forested biomes of the world.******

这项研究项目基于我们的合作伙伴，并由森林经理对变革森林的影响进行预测，并减轻因水压力而限制预期死亡率的策略及其对加拿大森林的ETS效应。这有助于减轻对迦南森林的一些最重要的影响：降低树种物种的多样性和不适感，无法迁移N气候。 l对生产力，尤其是死亡率和不确定性的负责人，它也将很容易地转化为既有林木的适应性策略在气候变化之后，森林生产力将进行。在太空中的叶片温度（热摄像头）和顶篷组织的遥感（无人机）中的水吸收（无人机），以跟踪用水和蒸腾，包括高度控制的树木多样性。魁北克省的大型永久地块，包括世界上所有森林生物群落的100万个森林地块。