The interrelation of carbon and water balance in beech-dominated forests - from leaf level water use efficiency to stand and area scale assessments

以山毛榉为主的森林中碳水平衡的相互关系 - 从叶层水分利用效率到林分和面积规模评估

• 批准号: 168537536
• 负责人: Professor Dr. Arthur Gessler
• 金额: --
• 依托单位: Institut für Bodenökologie (IBOE) (aufgelöst)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/168537536?language=en
• 关键词: interrelation; carbon; water; balance; beech

The interactions between the carbon (C) balance and the water relations in beech and competing vegetation as affected by climate and climate-related environmental conditions are assessed. Spanning this characterisation from the leaf level to the area scale we will combine (a) natural abundance stable isotope analysis and modelling, (b) water and C flux analysis and (c) a tree hydrodynamic model supplemented with a carbon transport module. On the leaf level we focus on the effects of mesophyll conductance and its importance for water use efficiency strategies on the one hand and its effects on isotope fractionation models on the other hand. On the plant level we will assess C and water transport and metabolite fluxes applying stable isotope tracers. The tree hydrodynamic model developed in the research group FOR 788 will be coupled to a phloem flow and C transport model and isotope fractionation modules will be incorporated. For upscaling the physiological information encoded in tree rings to the ecosystem and area scale we will combine isotopic landscape (isoscape) approaches with oxygen and C stable isotope modelling. The experimental and model-based assessments of the water and C balance and of competitive interactions on the leaf, tree and landscape level will be closely related and coupled to the mechanistic stand modelling approach MoBiLE developed by the 2nd project of this application bundle.

研究了气候和气候相关环境条件对山毛榉及其竞争植被碳(C)平衡和水分关系的影响。从叶片水平到面积尺度，我们将结合(a)自然丰度稳定同位素分析和建模，(b)水和碳通量分析，以及(C)补充了碳运输模块的树木水动力模型。在叶片水平上，我们一方面关注叶肉电导的影响及其对水分利用效率策略的重要性，另一方面关注叶肉电导对同位素分选模型的影响。在植物水平上，我们将使用稳定同位素示踪剂评估碳和水的运输和代谢物通量。由for788研究组开发的树木流体动力学模型将与韧皮部流动和C输运模型相结合，并将纳入同位素分馏模块。为了将树木年轮编码的生理信息提升到生态系统和区域尺度，我们将同位素景观（isoscape）方法与氧和C稳定同位素建模相结合。基于实验和模型的水分和碳平衡评估，以及叶片、树木和景观水平上的竞争相互作用，将与本应用程序包第二个项目开发的机械林分建模方法MoBiLE密切相关和耦合。

项目成果

Simulation of stand transpiration based on a xylem water flow model for individual trees

基于单株木质部水流模型的林分蒸腾模拟

• DOI: 10.1016/j.agrformet.2013.08.002
• 发表时间: 2013
• 期刊: Agricultural and Forest Meteorology
• 影响因子: 6.2
• 作者: Hentschel R;Bittner S;Janott;Biernath C;Holst J;Ferrio J.P;Gessler A;Priesack E.
• 通讯作者: Priesack E.

Drought response of mesophyll conductance in forest understory species--impacts on water-use efficiency and interactions with leaf water movement.

• DOI: 10.1111/ppl.12160
• 发表时间: 2014-09
• 期刊: Physiologia plantarum
• 影响因子: 6.4
• 作者: R. Hommel;R. Siegwolf;M. Saurer;G. Farquhar;Z. Kayler;J. Ferrio;A. Gessler