REU: Collaborative Research: Interaction of Climate and Nutrition on Forest Production: Comparison of Controlling Factors in Contrasting Environments

森林碳收支的最大不确定性 生态系统似乎是在规模和因素 控制碳在地上和地下的分配 生产 高尔博士，跑步，和Gholz建议测量 四个森林的关键碳收支指数， 气候（每个对照和施肥的立场）。 他们的 分析将集中在相对碳预算的 对比的网站，由相同的测量，而不是 比一个地方的详细碳预算更重要 他们估计 地上和地下净初级生产力和 冠层光合生产与茎、分支、根 俄勒冈州，蒙大拿州， 威斯康星州和佛罗里达。 建立了生态系统过程模型 计算森林中的水、碳和氮循环 将用于整合现场数据， 测量期间，并评估他们对变量的假设 不同气候下的碳分配模式。 详细 在佛罗里达进行的一项深入研究的数据将 用于将其相关预算置于背景中。 结果 应该提供更好的基本理解， 对森林生产力的环境控制， 预测森林对空气等扰动的反应 污染和气候变化。

The greatest uncertainty of carbon budgets in forest ecosystems appears to be in the magnitude and factors controlling partitioning of carbon to above- versus belowground production. Dr. Gower, Running, and Gholz propose to measure key carbon budget indices at four forests of widely contrasting climate (each with control and fertilized stands). Their analyses will concentrate on relative carbon budgets of the contrasting sites, produced by identical measurements, rather than a detailed carbon budget on one site. They will estimate above- and belowground net primary production and indices of canopy photosynthetic production and stem, branch, and root respiration losses of conifer forests in Oregon, Montana, Wisconsin and Florida. An established ecosystem process model that calculates water, carbon and nitrogen cycles in forests will be used to integrate field data, interpolate between measurement periods and evaluate their hypotheses on variable carbon partitioning patterns in diverse climates. Detailed data from an on-going intensive study at the Florida site will be used to place their relative budgets into context. Results should provide improved fundamental understanding of environmental controls on forest productivity, allowing better projections of forest responses to perturbations such as air pollution and climate change.