Collaborative Research: Burial of organic carbon in temperate, shallow lakes

合作研究：温带浅水湖泊中有机碳的埋藏

• 批准号: 0918753
• 负责人: James Cotner
• 金额: $ 44.35万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0918753&HistoricalAwards=false
• 关键词: Collaborative; Research; Burial; organic; carbon

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). There is worldwide concern over increasing concentrations of carbon dioxide in the atmosphere and its influence on global climate. Managing atmospheric concentrations of carbon dioxide requires understanding how ecosystems process carbon, and identifying systems that potentially store carbon for long periods of time. Carbon dynamics of the ocean are critical to atmospheric carbon remediation, but recent work has suggested that storage of carbon in freshwater systems is also important to the global carbon cycle. Understanding the controls of carbon storage in lake and wetland sediments represents a potential regulatory mechanism for increasing atmospheric carbon removal through management practices. This project will assess the role of shallow lakes and wetlands in the global carbon cycle and determine if they can be managed to store carbon in sediments more efficiently. Shallow lakes are dominated by either submerged aquatic plants or algae, and this study will test the hypothesis that shallow lakes dominated by submerged plants store more carbon in sediments than do lakes dominated by algae. It is hypothesized that submerged plants facilitate higher carbon storage because they are more resistant to decomposition relative to algae. These hypotheses will be tested using both modern day measurements and records from lake sediment cores to estimate carbon storage rates over scales of decades to centuries. Modern-day measurements will involve both comparative and experimental approaches, including observations on lakes that are manipulated to shift from algae to submerged-plant dominance. Many shallow lakes and wetlands are already heavily managed, but not necessarily for carbon removal. This project will increase fundamental knowledge regarding sources and controls of carbon storage in these systems, and determine whether shallow lakes can be managed to increase uptake and storage of atmospheric carbon dioxide. Research efforts will be strongly directed at undergraduate, graduate, and post-graduate training, with results available in traditional scientific literature and on the web. In particular, scientists will coordinate with the Science Museum of Minnesota to develop a website explaining the relevance and results of this work to the general public.

该奖项根据 2009 年美国复苏和再投资法案（公法 111-5）提供资金。全世界都在关注大气中二氧化碳浓度的增加及其对全球气候的影响。 管理大气中二氧化碳的浓度需要了解生态系统如何处理碳，并确定可能长期储存碳的系统。 海洋的碳动态对于大气碳修复至关重要，但最近的研究表明，淡水系统中的碳储存对于全球碳循环也很重要。 了解湖泊和湿地沉积物中碳储存的控制代表了通过管理实践增加大气碳清除的潜在监管机制。 该项目将评估浅湖和湿地在全球碳循环中的作用，并确定是否可以更有效地将碳储存在沉积物中。 浅水湖泊以沉水植物或藻类为主，这项研究将检验以下假设：以沉水植物为主的浅湖沉积物中储存的碳多于以藻类为主的湖泊。 据推测，沉水植物有助于更高的碳储存，因为它们相对于藻类更能抵抗分解。 这些假设将使用现代测量结果和湖泊沉积物岩心记录进行测试，以估计数十年至数百年范围内的碳储存率。 现代测量将涉及比较和实验方法，包括对湖泊的观测，这些湖泊被操纵以从藻类为主转变为沉水植物为主。 许多浅湖和湿地已经得到严格管理，但不一定是为了碳去除。该项目将增加有关这些系统中碳储存的来源和控制的基础知识，并确定是否可以管理浅湖以增加大气二氧化碳的吸收和储存。 研究工作将主要针对本科生、研究生和研究生培训，其结果可在传统科学文献和网络上获得。 特别是，科学家将与明尼苏达州科学博物馆合作开发一个网站，向公众解释这项工作的相关性和结果。