Collaborative Research: The Response of Lakes to Disturbance and Climate Change: Calibrating Sedimentary Records to Test the Landscape Position Concept

合作研究：湖泊对干扰和气候变化的响应：校准沉积记录以测试景观位置概念

• 批准号: 0751283
• 负责人: Jasmine Saros
• 金额: $ 1.74万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-25 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0751283&HistoricalAwards=false
• 关键词: Collaborative; Research; Response; Lakes; Disturbance

AbstractLandscape disturbance and climate change affect lakes in proportion to their contact with ground water, sometimes resulting in different responses in neighboring lakes. This project develops methods for reconstructing past water chemistry and food webs of lakes. The biological and chemical deposits in surface sediment samples will be compared with the water in 62 modern lakes. The resulting relationships will be tested by comparing sediment cores with 24 years of observations from the North Temperate Lakes Long Term Ecological Research (NTL-LTER) site. The methods will then be used to reconstruct 150 years of history for several lakes, adding perspective to the long-term observations of the NTL-LTER and testing the prediction that lakes high in the local landscape had more severe and longer-lasting effects of 19th century logging than low lakes that are more influenced by groundwater. This research will also help to understand the response of lakes to severe droughts that last decades to centuries by identifying periods of low lake levels during the last 10,000 years. Understanding the variability of the responses of lakes to climate change and disturbance is essential to predicting the responses of particular lakes to future changes in land use and climate. This project will bring together expertise from several strong programs at the University of Wisconsin (the Center for Limnology, Botany, the Center for Climatic Research, NTL-LTER, and UW-LaCrosse), with the Limnological Research Center and LacCORE National Lacustrine Core Repository at the University of Minnesota and the United States Geologic Survey Water, Energy, and Biogeochemical Budgets (WEBB) project. Cores collected in this project will be archived at LacCORE and made available to future researchers, forging important new links between the LTER network, the paleoecology and paleoclimate communities, and groundwater scientists at the USGS. Two graduate students and at least 10 undergraduates will participate, and the project will contribute to the Limnology Explorers program, an interdisciplinary educational experience for middle school students coordinated by the NTL-LTER and the UW Center for Biology Education as part of the SchoolYard LTER initiative.

Abstractland景观干扰和气候变化与与地下水的接触成比例地影响湖泊，有时会导致邻近湖泊的不同反应。该项目开发了重建过去的水化学和湖泊食物网的方法。将表面沉积物样品中的生物和化学沉积物与62个现代湖泊的水进行比较。将通过将沉积物核与北部温带湖泊长期生态研究（NTL-tlter）位点进行比较24年的观察结果来测试所得关系。然后，这些方法将用于重建几个湖泊的150年历史，从而增加了NTL距离的长期观察结果，并测试了当地景观中高湖泊高的湖泊具有比受地下水更大的低湖泊影响的预测更严重，更持久的效果。这项研究还将有助于了解湖泊对过去几个世纪的严重干旱的反应，通过确定过去10，000年的低湖泊水平时期。了解湖泊对气候变化和干扰的反应的可变性对于预测特定湖泊对未来土地使用和气候变化的反应至关重要。该项目将从威斯康星大学（植物学中心，气候研究中心，NTL-l-lter和UW-Lacrosse中心）以及LACCORE研究中心和Laccore National Laculatine Core Reposority的多个强大计划中的专业知识汇集在一起该项目收集的核心将在Laccore存档，并提供给未来的研究人员，在USGS的LTE网络，古生物学和古气候社区以及地下水科学家之间建立重要的新联系。两名研究生和至少10名本科生将参加，该项目将为Limnology Explorers计划做出贡献，这是由NTL-LETER和UW生物学教育中心协调的中学生的跨学科教育经验，作为Schoolyard Lter intiative的一部分。