Collaborative Research: Tidal Marsh Outwelling of Dissolved Organic Matter into the Chesapeake Bay: Impact on the Optical, Chemical & Microbial Characteristics of Estuarine Wat

合作研究：潮汐沼泽溶解有机物涌入切萨皮克湾：对光学、化学的影响

• 批准号: 0742185
• 负责人: Maria Tzortziou
• 金额: $ 11.81万
• 依托单位: University of Maryland, College Park
• 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: 2007-09-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0742185&HistoricalAwards=false
• 关键词: Collaborative; Research; Tidal; Marsh; Outwelling

Dissolved organic matter, DOM, is a major reservoir of organic carbon in estuaries and the ocean. It plays a key role in coastal ecosystem ecology as a food source for microbes, sunscreen against ultraviolet radiation for plankton, and a chemical reactant affecting water quality. This project seeks to understand the role of tidal marshes as sources of DOM. The abundance of marshes in the Chesapeake Bay (70,000 ha) make this an ideal place for addressing several key questions. Do the properties of DOM differ between freshwater and saltwater estuaries? Are differences due to the types of plants the adjacent marshes support or amount of salt in the water? Do microbes grow differently on DOM from certain marsh types? A comprehensive array of methods will be used to answer these questions including field studies, optical properties, chemical analyses and novel laboratory studies. The ultimate goal is to better understand what regulates sources and fates of DOM as it is transported by estuaries to the coastal ocean. The research will improve our ability to use ocean color remote sensing to understand aspects of the ecology of the Chesapeake Bay and other coastal zones. Because DOM production is an important process in global carbon cycling, the research also will contribute to our understanding of the controls on atmospheric carbon dioxide and, hence, climate change. The work promotes teaching, training, and learning by incorporating research into the Smithsonian Environmental Research Center's (SERC) public education programs, which brings hands-on science experiences to nearly 10,000 children every year. The public will learn about the research through mass media, websites, and public events hosted at SERC and the University of Maryland.

溶解有机物(DOM)是河口和海洋中有机碳的主要储存库。它作为微生物的食物来源、浮游生物抵御紫外线辐射的防晒剂和影响水质的化学反应物，在海岸生态系统生态中发挥着关键作用。该项目试图了解潮汐沼泽作为DOM来源的作用。切萨皮克湾(70,000公顷)丰富的沼泽使这里成为解决几个关键问题的理想场所。淡水河口和咸水河口的DOM特性是否不同？这种差异是由于邻近沼泽支持的植物类型或水中盐分的数量造成的吗？微生物在DOM上的生长与某些沼泽类型不同吗？将使用一系列全面的方法来回答这些问题，包括实地研究、光学性质、化学分析和新颖的实验室研究。最终目标是更好地了解是什么控制着DOM的来源和命运，因为它是由河口输送到沿海海洋的。这项研究将提高我们利用海洋颜色遥感了解切萨皮克湾和其他沿海地区生态方面的能力。由于DOM的产生是全球碳循环中的一个重要过程，因此这项研究也将有助于我们理解大气二氧化碳的控制，从而有助于气候变化。这项工作通过将研究纳入史密森环境研究中心(SERC)的公共教育项目来促进教学、培训和学习，该项目每年为近10,000名儿童带来亲身实践的科学体验。公众将通过大众媒体、网站和在SERC和马里兰大学举办的公共活动来了解这项研究。