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

该项目的目标是模拟未来环境条件下山毛榉主导森林的树木生长和林分动态。将特别强调模拟根际和冠层对氮、水和光的种间和种内竞争。这将需要修改模型结构，增加子模块和过程，以及改进过程参数化，例如描述植物根系和微生物同时吸收氮，实现动态根系生长，改进植物C和N分配算法，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，并将同时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，C和N的周转和储存，以及C和N化合物在一系列环境条件下的生物圈-大气交换，包括预测的气候变化情景和实际的管理方案集合。

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.