dendroecology and dendroclimatology

树木生态学和树木气候学

• 批准号: CRC-2021-00368
• 负责人: Gennaretti, Fabio
• 金额: $ 8.74万
• 依托单位: Université du Québec en Abitibi-Témiscamingue
• 依托单位国家: 加拿大
• 项目类别: Canada Research Chairs
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=757675
• 关键词: dendroecology; dendroclimatology

The boreal forest represents an essential resource for Canada and a vital carbon stock for the regulation of the climate. It is thus crucial to characterize and anticipate the climate variability in the boreal region and to study and predict the associated impacts on vegetation. Analyzing the links between climate and the boreal forest requires robust data spanning long time periods and a detailed understanding of the functioning of boreal trees. Among the possible data sources, tree-ring chronologies are ecological archives that allow analysis of climate variability and forest processes over centuries and millennia. The proposed CRC will address current knowledge gaps in tree-ring-based ecological and climatological studies for the boreal forest by: (1) exploiting rarely used tree-ring traits, (2) increasing the classical annual resolution of tree-ring-based reconstructions, and (3) considering tree physiological functioning in the analyses. A state-of-the-art laboratory for quantitative wood anatomy and ecophysiological modeling will be developed, attracting talented HQP and enhancing international collaborations. The functioning of trees will be analyzed for key periods of the last two millennia: the medieval climatic anomaly, following large volcanic eruptions, pre and post fires. Forest growth and climate reconstructions and projections for the Canadian boreal region will be improved.

北方森林是加拿大的重要资源，也是调节气候的重要碳库。因此，表征和预测北方地区的气候变化以及研究和预测对植被的相关影响至关重要。分析气候与北方森林之间的联系需要跨长时间段的可靠数据以及对北方树木功能的详细了解。在可能的数据源中，树木年轮年表是生态档案，可以分析几个世纪和几千年的气候变化和森林过程。拟议的 CRC 将通过以下方式解决当前基于树木年轮的北方森林生态和气候研究的知识差距：（1）利用很少使用的树木年轮特征，（2）提高基于树木年轮重建的经典年度分辨率，(3) 在分析中考虑树木的生理功能。将开发一个最先进的定量木材解剖学和生态生理学模型实验室，吸引优秀的高级人才并加强国际合作。将分析过去两千年的关键时期树木的功能：中世纪的气候异常、大型火山喷发之后、火灾前后。加拿大北方地区的森林生长和气候重建及预测将得到改善。