RAPID: The impact of Hurricane Harvey on water column and sediment biogeochemistry of the Mission-Aransas Estuary in south Texas

RAPID：飓风哈维对德克萨斯州南部 Mission-Aransas 河口水柱和沉积物生物地球化学的影响

• 批准号: 1763167
• 负责人: Zhanfei Liu
• 金额: $ 15.71万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-10-15 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1763167&HistoricalAwards=false
• 关键词: RAPID; impact; Hurricane; Harvey; water

This project involves rapid-response research into the effects of Hurricane Harvey on the Mission-Aransas estuary system in south Texas. Hurricane Harvey passed directly over this region on August 25-26, 2017. Because these waters are the site of the Mission-Aransas National Estuarine Research Reserve (MANERR), the investigators have a history of data from before the storm with which to compare the data they will collect. They proposed to investigate the effect of the passage of the storm on carbon and nitrogen cycling, and thus the ecosystem, in the waters and sediments of Copano Bay and Aransas Bay. Their results will be important to understanding coastal processes both in general and in response to extreme events. The investigators pose two hypotheses, which can be summarized broadly as 1) inputs of nutrients from river flooding will stimulate algal blooms in the estuary and 2) changes in sediment grain size distribution will affect sediment nitrogen cycling. They will collect water samples for nutrients, pigments, lipids, bulk carbon, and carbon isotope analyses, together with standard water quality parameters using a YSI Sonde (salinity, temperature, pH, chlorophyll a, dissolved oxygen and turbidity) at the five System Wide Monitoring Program sites of the MANERR on a biweekly to monthly basis. Sediment samples will be collected at all sites in the fall of 2017 and examined for grain size, pigments, carbon and nitrogen content, carbon isotopes, pigments, and lipids. The results will be used, in combination from data collected earlier this year, to examine physical, chemical, and biological responses to this major event. The project will support a graduate student research assistant and three undergraduate student researchers. Communication with the public will occur through well-established and effective programs at the Mission-Aransas NERR and the University of Texas Marine Science Institute.

该项目涉及对哈维飓风对南德克萨斯州宣教河口系统影响的快速响应研究。哈维飓风直接于2017年8月25日至26日通过该地区。由于这些水域是瓦兰西亚州国家河口研究保护区（MANERR）的所在地，因此调查人员在暴风雨前的数据史与将其收集的数据进行比较。他们提议研究暴风雨对碳和氮循环的影响，从而在Copano Bay和Aransas湾的水域和沉积物中进行生态系统。他们的结果对于理解一般和对极端事件的沿海过程非常重要。研究人员提出了两个假设，可以大致概括为1）河流洪水的养分输入将刺激河口中的藻华和2）泥沙晶粒尺寸分布的变化会影响沉积物氮循环。他们将收集水样，以获取营养，颜料，脂质，散装碳和碳同位素分析，以及使用YSI Sonde（盐度，温度，pH，pH，叶绿素A，溶解的氧气和浊度）的标准水质参数，在五个系统广泛的监测程序网站上，在五个系统的范围内均可在一个月上。在2017年秋季，将在所有地点收集沉积物样品，并检查晶粒尺寸，颜料，碳和氮含量，碳同位素，颜料和脂质。结果将与今年早些时候收集的数据结合使用，以检查对这一主要事件的物理，化学和生物学反应。该项目将支持研究生研究助理和三名本科生研究人员。与公众的沟通将通过宣教 - 阿兰萨斯州NERR和德克萨斯大学海洋科学研究所的良好有效计划进行。

项目成果

Molecular Level Analysis Reveals Changes in Chemical Composition of Dissolved Organic Matter From South Texas Rivers After High Flow Events

• DOI: 10.3389/fmars.2019.00673
• 发表时间: 2019-11
• 期刊: Frontiers in Marine Science
• 影响因子: 3.7
• 作者: Kaijun Lu;Zhanfei Liu

The bioavailability of riverine dissolved organic matter in coastal marine waters of southern Texas

• DOI: 10.1016/j.ecss.2019.106477
• 发表时间: 2019-12
• 期刊: Estuarine Coastal and Shelf Science
• 影响因子: 2.8
• 作者: Kai Wu;Kaijun Lu;M. Dai;Zhanfei Liu