The ecology and paleoecology of shallow lakes

浅水湖泊的生态学和古生态学

• 批准号: 312182-2008
• 负责人: GregoryEaves, Irene
• 金额: $ 1.29万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=548658
• 关键词: ecology; paleoecology; shallow; lakes

Shallow lakes are a pervasive feature in temperate landscapes and hotspots of biological productivity. Despite the ubiquity of shallow lakes, there has been a bias in limnology to study deep lakes. Europeans have recognized this disparity and over the past two decades, they have contributed new data about the ecology and paleoecology of shallow lakes in Europe. However, given the increasing pressures on fresh waters, it is important to obtain data for shallow lakes in North America to determine the extent to which European models will be applicable to this continent. To address this need, I have initiated a research program that uses both spatial and temporal approaches to resolve patterns of ecological change in shallow lakes. The crux of the present proposal is to develop new tools for inferring past ecological changes from lake sediment records and apply these tools to quantify the trajectories, timing and magnitude of ecological dynamics in temperate, northeastern North American shallow lakes over the past ~1000 years. This research will collect and analyze data for a spectrum of paleolimnological indicators (i.e., algal pigments, diatoms, cladocera, chironomids, pollen and macrofossils) to enable ecological changes to be inferred in the broadest context possible. The results will then be compared with published records from other regions to determine if the ecological dynamics scale with the intensity of land-use and climate variability at a global level or whether responses are more regionally defined. This knowledge is critical for modeling the response of shallow lakes to future trajectories of environmental change and for developing effective environmental stewardship plans for one of our most precious natural resources - fresh water.

浅水湖泊是温带景观和生物生产力热点地区的普遍特征。 尽管浅水湖泊无处不在，但湖沼学一直倾向于研究深湖。 欧洲人已经认识到这种差异，在过去的二十年里，他们提供了关于欧洲浅水湖泊生态和古生态的新数据。 然而，鉴于对淡水沃茨的压力越来越大，重要的是要获得北美浅水湖泊的数据，以确定欧洲模型在多大程度上适用于该大陆。 为了满足这一需求，我已经启动了一项研究计划，使用空间和时间的方法来解决浅水湖泊生态变化的模式。 目前的建议的关键是开发新的工具来推断过去的生态变化，从湖泊沉积物记录和应用这些工具来量化的轨迹，时间和规模的生态动态在温带，北美东北部的浅水湖泊在过去的1000年。 这项研究将收集和分析一系列古湖泊指标的数据（即，藻类色素、硅藻、枝角类、摇蚊、花粉和大型化石），以便能够在尽可能广泛的背景下推断生态变化。 然后将结果与其他区域公布的记录进行比较，以确定生态动态是否与全球一级土地使用和气候变异的强度成比例，或者是否更区域性地确定反应。 这些知识对于模拟浅水湖泊对未来环境变化轨迹的响应以及为我们最宝贵的自然资源之一-淡水制定有效的环境管理计划至关重要。