Biogeochemical Response of the Lower Great Lakes to NutrientLoading and Climate: Past, Present, and Future Trends in Tropic State Variables

五大湖下游对养分负荷和气候的生物地球化学响应：热带状态变量的过去、现在和未来趋势

• 批准号: 9202774
• 负责人: Claire Schelske
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-11-15 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202774&HistoricalAwards=false
• 关键词: Biogeochemical; Response; Lower; Great; Lakes

This 3-year study will elucidate the historical response of the lower Great Lakes to nutrient enrichment and abatement, and provide a basis for monitoring changes in trophic state variables in other large, deep-water lakes. Data collected will calibrate existing proxy indicators to modern conditions and develop new techniques for estimating past, present and future changes in the trophic state of the Great Lakes. The field program will include data collection from the water column, sediment traps and cores from Lake Ontario and Erie. Laboratory experiments will determine the effects of nutrient enrichment on the carbon and nitrogen isotopic signature of organic matter produced by phytoplankton.

这项为期三年的研究将阐明下大湖对营养富集和减排的历史反应，并为监测其他大型水湖中营养状态变量的变化提供了基础。 收集的数据将校准现代条件的现有代理指标，并开发新技术，以估算大湖区营养状态的过去，现在和将来的变化。 现场计划将包括来自水柱，沉积物陷阱和来自安大略湖和伊利湖的核心的数据收集。 实验室实验将确定养分富集对浮游植物产生的有机物的碳和氮同位素特征的影响。