RUI: Integrating Algal Physiological Ecology and Paleolimnology to Decipher the Effects of Atmospheric Deposition and Climate Change on Alpine Lakes

RUI：整合藻类生理生态学和古湖泊学来解读大气沉降和气候变化对高山湖泊的影响

• 批准号: 0089600
• 负责人: Jasmine Saros
• 金额: $ 22.16万
• 依托单位: University of Wisconsin-La Crosse
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-15 至 2004-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0089600&HistoricalAwards=false
• 关键词: RUI; Integrating; Algal; Physiological; Ecology

0089600. SarosBecause of human intervention, the amount of atmospheric nitrogen deposited into alpine lakes has doubled in the last century. This alteration in aquatic nutrient concentrations may have been accelerated by increased precipitation in these regions. This study investigates the effects of nitrogen deposition and climate change on the community composition of sedimentary diatoms in montane lakes of Colorado and Montana. The interactions between anthropogenic nitrogen and precipitation are complex and their effects on diatom communities probably vary regionally. This project will use in situ experiments and field surveys to test the hypothesis that changes in the ratios of nutrients (e.g., nitrogen, phosphorus) have altered the structure of aquatic communities. Furthermore, the research will integrate paleobiology of fossil diatoms and elemental analysis, to reconstruct the composition of ancient communities, and the resources available to them. This study has potentially broad implications for understanding global change, and the mechanisms causing rapid shifts in the community structure of aquatic ecosystems.

0089600.由于人类的干预，在上个世纪，沉积到高山湖泊中的大气氮的数量翻了一番。 水生营养物浓度的这种变化可能由于这些地区降水量的增加而加速。本研究调查了氮沉降和气候变化对科罗拉多和蒙大拿山地湖泊沉积硅藻群落组成的影响。 人为氮和降水之间的相互作用是复杂的，它们对硅藻群落的影响可能因地区而异。 本项目将利用原位实验和实地调查来检验营养物比例变化的假设（例如，氮、磷）改变了水生群落的结构。 此外，该研究将整合化石硅藻的古生物学和元素分析，以重建古代群落的组成及其可用资源。 这项研究对理解全球变化以及引起水生生态系统群落结构快速变化的机制具有潜在的广泛意义。