LTER: Plum Island Sound Comparative Ecosystem Study (Pisces)Effects of Changing land Cover, Climate and Sea Level on Estuarine Trophic Dynamics

LTER：普拉姆岛声音比较生态系统研究（双鱼座）土地覆盖、气候和海平面变化对河口营养动态的影响

• 批准号: 9726921
• 负责人: Charles Hopkinson
• 金额: $ 414万
• 依托单位: Marine Biological Laboratory
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726921&HistoricalAwards=false
• 关键词: LTER; Plum; Island; Sound; Comparative; LTER; Plum; Island; Sound; Comparative

Human activities in rivers and watersheds have altered enormously the timing, magnitude and nature of inputs of materials such as water, sediments, nutrients and organic matter to estuaries. An important but neglected linkage between land and coastal waters is the input of dissolved and particulate organic carbon and organic nitrogen. This long term ecological research (LTER) in land/ocean margin ecosystems will focuses on the question-How will trophic structure and primary and secondary productivity in estuaries be affected by changes in organic matter, nutrient and water fluxes caused by changing land cover, climate and sea level? The project examines this question through 1) short and long term measurements of the fluxes of dissolved and particulate organic carbon and organic nitrogen entering estuaries from land, marshes and the ocean, 2) short and long term manipulative experiments to determine the effects of nutrient and organic matter interactions on the flow of C and N through pelagic and benthic food webs, and 3) modeling the effects of land use changes on food web transformations. The proposed research integrates estuarine biogeochernistry with studies of food webs and population biology of higher trophic levels. The research program will create a legacy of well designed and documented ecological experiments and observations. A data base of research results will be accessible (WWW) to the scientific community. The study builds on the existing long term research record at Plum Island Sound, MA, and at the North Inlet, SC and Wells, ME National Estuarine Research Reserves. Intensive work will take place at Plum Island Sound, and specific comparative studies at North Inlet and Wells. The research is designed to take advantage of natural differences between these systems to determine the importance of inorganic and organic matter interactions in controlling trophic structure, production and efficiency. The project will make a unique contribution to our understanding of land margin ecosystems by determining how changing nutrient supply interacts with the quality and quantity of organic matter to affect estuarine trophic structure. It will also develop modeling methods to link highly variable physical drivers, here tides, long term sea level rise, river inflow, and water circulation, with the understanding of ecological processes. The dynamic models developed will be useful in a variety of ways for predicting effects of various coastal management options. For example, the spatially explicit models to be developed can be used to predict the effects of changing land use on eutrophication and fish production.

河流和流域中的人类活动已大大改变了河口的投入的时机，大小和性质，例如水，沉积物，养分和有机物。土地和沿海水域之间的重要但被忽视的联系是溶解和颗粒有机碳和有机氮的输入。土地/海洋利润率生态系统中的这项长期生态研究（LTER）将重点放在问题上 - 河口的营养结构以及河口的一级和次要生产力会受到有机物，养分和水的变化而受到土地覆盖，气候和海平面变化引起的水的影响？ The project examines this question through 1) short and long term measurements of the fluxes of dissolved and particulate organic carbon and organic nitrogen entering estuaries from land, marshes and the ocean, 2) short and long term manipulative experiments to determine the effects of nutrient and organic matter interactions on the flow of C and N through pelagic and benthic food webs, and 3) modeling the effects of land use changes on food web transformations.拟议的研究将河口生物地球化学与食物网的研究和较高营养水平的人群生物学相结合。该研究计划将创建精心设计和文献记录的生态实验和观察的遗产。研究结果的数据库将可以访问（www）。 这项研究建立在马萨诸塞州梅花岛海峡的现有长期研究记录的基础上，以及我国家河口研究储量的北进口，SC和Wells。在梅花岛的声音中将进行密集的工作，并在北入口和井中进行特定的比较研究。该研究旨在利用这些系统之间的自然差异，以确定无机和有机物相互作用在控制营养结构，生产和效率中的重要性。 该项目将通过确定不断变化的养分供应如何与有机物的质量和数量相互作用以影响河口营养结构的质量和数量来对我们对土地边缘生态系统的理解做出独特的贡献。它还将开发建模方法，以将高度可变的物理驱动器联系起来，这里的潮汐，长期海平面上升，河流流入和水流通以及对生态过程的理解。开发的动态模型将以各种方式来预测各种沿海管理选项的影响。例如，要开发的空间显式模型可用于预测土地使用变化对富营养化和鱼类生产的影响。