A Synergistic Approach of Using Fluxes, Isotopes and Models to Partition Plant and Soil Contributions to Ecosystem Exchange of CO2 and H2O

使用通量、同位素和模型来划分植物和土壤对 CO2 和 H2O 生态系统交换的贡献的协同方法

• 批准号: 0317139
• 负责人: Todd Dawson
• 金额: --
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0317139&HistoricalAwards=false
• 关键词: Synergistic; Approach; Using; Fluxes; Isotopes

Terrestrial ecosystems play a central role in the cycling of carbon (C) and water (H2O) on Earth, yet the quantification of the biological and physical controls over the rates and magnitudes of C and H2O movement into and out of the plants and the soils within any particular ecosystem are largely unknown. The proposed research will, for the first time, combine a set of proven methods that will afford a better understanding of the biophysical controls on whole-ecosystem C and H2O exchange. These methods will permit the partitioning of the various fluxes amongst those related to plant photosynthesis, respiration, and transpiration versus soil-related fluxes from microbial and root respiration and evaporation. This information is needed for the development and validation of models aimed at extrapolating fluxes in both space and time and for predicting how ecosystems will respond to increasing atmospheric CO2 concentrations and more water limitation in the future.

陆地生态系统在地球上碳（C）和水（H2O）的循环中起着核心作用，但是对C和H2O运动的速度和大小的生物学和物理控制的量化量很大。拟议的研究将首次结合一组经过验证的方法，这些方法将更好地理解整个生态系统C和H2O交换的生物物理控制。这些方法将允许在与植物光合作用，呼吸，蒸腾作用以及微生物和根呼吸和蒸发的土壤相关的通量有关的情况下分配各种通量。对于旨在推断时空中的通量以及预测生态系统将如何响应大气二氧化碳浓度和将来更多的水限制的模型，需要这些信息。