Process Oriented Simulation of Competition of Heterotrophic Microorganisms and Plants in Beech-Dominated Deciduous Forests for Nitrogen and Water

该项目的目标是在未来环境条件的现实情景下模拟山毛榉为主的森林的树木生长和林分动态。特别强调的是，在根际和冠层的氮，水和光的种间和种内竞争的模拟。这将需要修改模型结构，增加子模块和过程，以及改进的过程参数化，例如植物根系和微生物同时吸收氮的描述，动态根系生长的实施，植物C和N分配的改进算法，以及林分水文。 开发工作将利用项目伙伴的实地和实验室研究进行参数化和评价，并将进行彻底的不确定性分析。最后，新开发的模型将用于模拟林分生长、碳和氮的周转和储存，以及在一系列环境条件下碳和氮化合物的生物圈-大气交换，这些环境条件包括预测的气候变化情景和现实的管理备选方案。

The goal of this project is to model tree growth and stand dynamics of beech-dominated forests under realistic scenarios of future environmental conditions. Special emphasis will be given to the simulation of inter- and intra-species competition in the rhizosphere and the canopy for nitrogen, water, and light. This will require modifications of the model structure, additions of sub-modules and processes, as well as improved process parameterisations, e.g. the description of simultaneous nitrogen uptake by plant roots and microbes, the implementation of dynamic root growth, improved algorithms for plant C and N allocation, as well as stand hydrology. Developments will use field and laboratory studies of project partners for parameterization and evaluation and will be accompanied by a thorough uncertainty analysis. Finally, the newly developed model will be used to simulate stand growth, C and N turnover and storage, as well as biosphere-atmosphere exchange of C and N compounds under a range of environmental conditions that include projected scenarios of climate change and a realistic collection of management options.