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.

溶解的有机物Dom是河口和海洋中有机碳的主要储备。它在沿海生态系统生态学中起关键作用，作为微生物的食物来源，针对浮游生物的紫外线辐射的防晒霜以及影响水质的化学反应物。该项目旨在理解潮汐沼泽作为DOM来源的作用。切萨皮克湾（70,000公顷）的大量沼泽使这是解决几个关键问题的理想场所。 DOM的性质在淡水和盐水之间是否有所不同？由于植物的类型，邻近沼泽支撑或水中的盐量是否存在差异？微生物在DOM上与某些沼泽类型的生长不同吗？全面的方法将用于回答这些问题，包括现场研究，光学特性，化学分析和新型实验室研究。最终目标是更好地了解什么是由河口运送到沿海海洋的DOM的来源和命运。这项研究将提高我们使用海洋色遥感来了解切萨皮克湾和其他沿海地区生态学方面的能力。 由于DOM生产是全球碳循环中的重要过程，因此该研究还将有助于我们理解对大气二氧化碳以及气候变化的控制。这项工作通过将研究纳入史密森尼环境研究中心（SERC）公共教育计划来促进教学，培训和学习，该计划每年为近10,000名儿童带来动手科学经验。公众将通过大众媒体，网站和公共活动来了解研究，该活动在SERC和马里兰大学举办。