Recovery of Terrestrial Ecosystems from Major Disturbance: Constraints Due to Carbon/Nutrient Interactions

本研究将结合生态系统过程模型（GEM）和来自世界各地各种生态系统类型的生态系统数据集来研究碳/营养相互作用对生态系统从重大干扰中恢复的影响。目标是：1)确定影响生态系统对干扰的响应和恢复的元素循环特征；2)综合干扰和恢复数据；3)分析干扰恢复过程中碳储量、养分循环、水平衡和其他生态系统过程的变化。4)全球变化对生态系统恢复的附加效应评估。元素循环之间的相互作用对生态系统从干扰中恢复的影响仍然是生态系统生态学家的中心问题。气候变化对生态系统恢复的要素控制的影响了解较少。提高对元素通量如何控制生态系统恢复以及这些通量如何响应全球变化的认识，将对生态和环境政策作出重大贡献。该项目将通过建模方法解决这些关键问题，该方法将评估模型参数对生态系统恢复过程中变化条件的敏感性。

This research will combine an ecosystem process model (GEM) and ecosystem data sets from a variety of ecosystem types world- wide to address effects of carbon/nutrient interactions on ecosystem recovery from major disturbances. Objectives are 1) to identify characteristics of element cycles that affect ecosystem respond to and recovery from disturbances, 2) synthesis of disturbance and recovery data, 3) analysis of changes in carbon storage, nutrient cycling, water balance and other ecosystem processes during recovery from disturbance, and 4) assessment of additional effects of global change on recovering ecosystems. %%% The effect of interactions among element cycling on ecosystem recovery from disturbance remains a central question for ecosystem ecologists. The effects of climate change on elemental control of ecosystem recovery are more poorly understood. Improved knowledge of how elemental fluxes control ecosystem recovery and how these fluxes will respond to global change will be a major contribution to ecology and environmental policy. This project will address these critical questions through a modeling approach that will assess sensitivity of model parameters to changing conditions during ecosystem recovery.