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

REU：合作研究：气候和营养对森林生产的相互作用：对比环境中控制因素的比较

基本信息

批准号：
8918022
负责人：
Stith Gower
金额：
$ 17.69万
依托单位：
University of Wisconsin-Madison
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1990
资助国家：
美国
起止时间：
1990-03-01 至 1993-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8918022&HistoricalAwards=false
关键词：
REU Collaborative Research Interaction Climate

项目摘要

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.

森林生态系统中碳预算的最大不确定性似乎在于控制碳分配至高于地下生产的因素和因素。 Gower博士，Running和Gholz提议在四个广泛对比的气候（每个人都有控制和受精的林分）的四个森林中衡量关键的碳预算指数。他们的分析将集中于相同测量的对比地点的相对碳预算，而不是一个站点上的详细碳预算。他们将估计俄勒冈州，蒙大拿州，威斯康星州和佛罗里达州的针叶树森林的冠层光合生产和茎，分支和根呼吸损失的冠层光合生产和根呼吸损失的指标。在森林中计算水，碳和氮循环的建立生态系统过程模型将用于整合现场数据，在测量周期之间进行插值，并评估其在多样化气候中可变碳分配模式上的假设。来自佛罗里达州正在进行的强化研究的详细数据将使用将其相对预算置于环境中。结果应提高对环境对森林生产率的基本了解，从而更好地预测森林对空气污染和气候变化等扰动的反应。