Climatic impact on functional wood anatomy, seasonal wood formation, and tree growth along altitudinal gradients on Corsica

气候对科西嘉岛功能性木材解剖结构、季节性木材形成和沿海拔梯度的树木生长的影响

• 批准号: 318196965
• 负责人: Professor Dr. Achim Bräuning
• 金额: --
• 依托单位: Institut für Geographie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/318196965?language=en
• 关键词: Climatic; impact; functional; wood; anatomy

The impact of climate extreme events on forest ecosystems is manifested in structural changes of the wood anatomy which represents a long-term memory in the climate archive wood and which influence the functionality of the hydraulic system of trees. Wood anatomical properties react within genetically predefined and species-specific plasticity and can be quantified with image analytical approaches. Wood anatomical anomalies like intra-annual density fluctuations occur in a high frequency within the Mediterranean region and document the response of cambial activity and cell differentiation in dry spells within the vegetation period. The temporal dynamics ofcambial activity and differencing wood tissues is influenced by interannual variations of growth-limiting climate factors and mirrors shortterm, but according to high tree ages also long-term climate variability. We will analyze the impact of seasonal climate on cambial activity, growth rates, and formed wood tissues`anatomy along an elevation gradient that includes all climatic types within forested regions on Corsica. The study includes tow evergreen pine species (Pinus pinaster, Pinus nigra) whose distribution patterns overlap within thestudied elevation gradient, allowing a differentiation between speciesspecific and environmental factors influencing wood formation.Collaborations within the project bundle CorsicArchive will provide meteorological data and climatological models along the elevationgradient as well as stable oxygen isotope analyses of wood and precipitation water with high temporal resolution and will allow aclimatological and tree physiological interpretation of the measured growth processes and wood structures. These data will be integratedin a tree-growth-stable isotope model DendroIso and applied on former climatic extreme events during the past centuries to gain abetter understanding of the hydroclimatic variability during different climate periods on Corsica, and on their effects on tree ecology.

气候极端事件对森林生态系统的影响体现在木材解剖结构的结构变化中，这代表了气候档案木中的长期记忆，并且影响树木液压系统的功能。木材的解剖学特性在遗传预定义和物种特异性可塑性中反应，可以通过图像分析方法来量化。木材解剖异常（如年度内密度波动）在地中海地区的高频中发生，并记录植被期间干咒的坎比亚活性和细胞分化的响应。野性活性和差异组织的时间动力学受到生长限制的气候因素的年际变化和短期反映的影响，但根据高树时代的长期气候变异性。我们将分析季节性气候对邮政活性，生长速率和沿高度梯度沿木质组织的造成的影响的影响，该梯度包括Corsica森林地区的所有气候类型。 The study includes tow evergreen pine species (Pinus pinaster, Pinus nigra) whose distribution patterns overlap within thestudied elevation gradient, allowing a differentiation between speciesspecific and environmental factors influencing wood formation.Collaborations within the project bundle CorsicArchive will provide meteorological data and climatological models along the elevationgradient as well as stable oxygen isotope analyses of wood and precipitation water with高时间分辨率，将允许对测得的生长过程和木材结构的满足和树生理解释。这些数据将是在过去几个世纪以前的气候极端事件上的树木生长稳定的同位素模型Dendroiso，以在科西嘉岛的不同气候时期内对氢化气候变异性的缩写了解，并对其对树生态学的影响。

项目成果

The Dry and the Wet Case: Tree Growth Response in Climatologically Contrasting Years on the Island of Corsica

• DOI: 10.3390/f12091175
• 发表时间: 2021-08
• 期刊: Forests
• 影响因子: 2.9
• 作者: M. Häusser;S. Szymczak;Isabel Knerr;J. Bendix;É. Garel;F. Huneau;K. Trachte;S. Santoni;A. Bräuning