Inputs and Fates of Organic Nitrogen in Two Land-Margin Ecosystems: Chesapeake Bay and Georgia Coastal Rivers

9522617布朗克该项目将研究两个对比强烈的河口系统--切萨皮克湾和佐治亚州沿海河流--中溶解有机氮的组成、生物有效性以及吸收和释放速率。这些系统在溶解有机氮的类型、来源和相对易损性方面有很大的不同。由于首席调查员将在这些地点与目前获得资助的两项陆缘生态系统研究一起进行研究，因此研究结果将大大加强对这些重要沿海水生环境的了解。这项拟议研究的意义是多方面的。首先，在广播中，感觉到国家沿海水域和河口的富营养化是一个众所周知的问题，但我们对有机氮在这个问题上的贡献和重要性知之甚少。其次，随着新技术的出现，这些研究将产生并认识到细菌和浮游植物获取氮素的机制将有助于我们平衡和控制通过河口和海岸系统的氮素流动。

9522617 Bronk This project will study the composition, biological availability, and rates of uptake and release of dissolved organic nitrogen in two highly contrasting estuarine systems- the Chesapeake Bay and Georgia coastal rivers. These systems are vastly different with respect to the type, source and relative liability of dissolved organic nitrogen. Because the Principal Investigators will conduct their studies in conjunction with the two currently funded Land Margin Ecosystem Research studies at the these sites, the results will greatly enhance the understanding of these important coastal aquatic environments. The significance of the proposed research is several fold. First, in the broadcast, sense the eutrophication of nation's coastal waters and estuaries is a well recognized problem, yet we have little knowledge of the contribution and importance of organic nitrogen to this problem. Second, with the advent of new techniques, these studies will yield and appreciation of the mechanisms by which both bacteria and phytoplankton obtain their nitrogenous nitrogen will aid our ability to balance and control the flow of nitrogen through estuarine and coastal systems.