Impacts of Engineered De-stratification on Estuarine Biogeochemistry

工程去层化对河口生物地球化学的影响

基本信息

项目摘要

Lakes, reservoirs, and coastal estuaries are all susceptible to poor water quality as a result of nutrient pollution. In some cases, aquatic "dead zones" are created where dissolved oxygen concentrations become so low that it negatively impacts the abundance of organisms, the availability of nutrients, and the organization of food webs. Engineered de-stratification is a technological solution that includes the use of large scale aerators to mix the water column and to force atmospheric oxygen into deep waters, thereby improving oxygen conditions in these systems. This research project seeks to determine both the intended and unintended consequences of engineered de-stratification, especially in terms of its effects on oxygenation and the chemical cycles that control greenhouse gas and toxin production. For example, changes to the oxygen concentrations may affect the availability of mercury and methane in the environment. Another objective of the research project is to collaborate with county government and citizen scientists interested in studying and restoring the Rock Creek estuary, which is connected to the Chesapeake Bay in Maryland. A critical step in understanding the tradeoffs associated with engineered de-stratification is to document the impacts of de-stratification on biogeochemistry and associated ecosystem responses. Large engineered aeration systems have rarely been installed in tidal waters. This research study capitalizes on a system installed in the Rock Creek estuary, where this technology has been applied for nearly thirty years. The responses of nitrogen, phosphorus, mercury, and methane pools to aeration is being comprehensively documented, and both the ecosystem services (e.g., denitrification) and unintended consequences (e.g. greenhouse gas emissions) associated with engineered de-stratification are being quantified. The researchers are using a novel, user-controlled estuarine-scale de-stratification system for testing dose-response relationships. They are focusing on understanding the effects of aeration time and tidal timing on biogeochemical responses. In optimizing aeration protocols the study will provide insights into the effects of cycled oxygen depletion on nutrient and greenhouse gas cycling. Data from the experiments will be used to enhance a modeling tool to extend findings to other aquatic systems with chronic oxygen depletion. These new efforts will reveal a new and comprehensive picture of how engineered de-stratification can be efficiently utilized to alleviate oxygen depletion and enhance nutrient removal services.
湖泊、水库和沿海河口都容易受到营养物污染造成的水质差的影响。在某些情况下,溶解氧浓度变得如此之低,以至于对生物体的丰度、营养物质的可用性和食物网的组织产生负面影响,从而形成水生“死区”。工程去分层是一种技术解决方案,包括使用大型曝气器来混合水柱并迫使大气氧气进入深水沃茨,从而改善这些系统中的氧气条件。该研究项目旨在确定工程化去分层的预期和非预期后果,特别是在其对氧合和控制温室气体和毒素产生的化学循环的影响方面。例如,氧气浓度的变化可能会影响环境中汞和甲烷的可用性。该研究项目的另一个目标是与县政府和对研究和恢复岩溪河口感兴趣的公民科学家合作,该河口与马里兰州的切萨皮克湾相连。理解与工程化去分层相关的权衡的关键步骤是记录去分层对土壤地球化学和相关生态系统响应的影响。大型工程曝气系统很少安装在潮汐沃茨。本研究利用了安装在岩溪河口的系统,该技术已应用近三十年。氮、磷、汞和甲烷池对曝气的响应正在被全面记录,生态系统服务(例如,反硝化作用)和与工程化去分层相关的非预期后果(例如温室气体排放)正在量化。研究人员正在使用一种新的,用户控制的河口规模去分层系统来测试剂量-反应关系。他们的重点是了解曝气时间和潮汐时间对地球化学反应的影响。在优化曝气协议的研究将提供深入了解循环耗氧对养分和温室气体循环的影响。来自实验的数据将用于增强建模工具,以将研究结果扩展到其他慢性缺氧的水生系统。这些新的努力将揭示一个新的和全面的画面,如何工程去分层可以有效地利用,以减轻氧气消耗和提高营养物去除服务。

项目成果

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Lora Harris其他文献

Role of hepatic de novo lipogenesis in the development of fasting-induced fatty liver in the American mink (Neovison vison).
肝脏从头脂肪生成在美国水貂禁食诱导的脂肪肝发展中的作用(Neovison vison)。
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    3.6
  • 作者:
    K. Rouvinen‐Watt;Lora Harris;Morag F. Dick;Catherine Pal;Sha Lei;A. Mustonen;P. Nieminen
  • 通讯作者:
    P. Nieminen
Molecular evolution of adiponectin in Carnivora and its mRNA expression in relation to hepatic lipidosis.
食肉目脂联素的分子进化及其与肝脂质沉积相关的 mRNA 表达。
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    2.7
  • 作者:
    P. Nieminen;K. Rouvinen‐Watt;Suvi Kapiainen;Lora Harris;A. Mustonen
  • 通讯作者:
    A. Mustonen
De novo lipogenesis is suppressed during fasting but upregulated at population decline in cyclic voles
在周期性田鼠中,禁食期间脂肪从头生成受到抑制,但数量减少时脂肪生成上调
  • DOI:
  • 发表时间:
    2016
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    P. Nieminen;K. Rouvinen‐Watt;Lora Harris;O. Huitu;H. Henttonen;A. Mustonen
  • 通讯作者:
    A. Mustonen
Trends in Abundance Indices of Fishes in Maryland’s Coastal Bays During 1972–2009
  • DOI:
    10.1007/s12237-013-9735-8
  • 发表时间:
    2013-11-19
  • 期刊:
  • 影响因子:
    2.300
  • 作者:
    Jennifer Pincin;Michael J. Wilberg;Lora Harris;Angel Willey
  • 通讯作者:
    Angel Willey
Widespread warming of Earth's estuaries
地球河口普遍变暖
  • DOI:
    10.1002/lol2.10389
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    7.8
  • 作者:
    Punwath Prum;Lora Harris;J. Gardner
  • 通讯作者:
    J. Gardner

Lora Harris的其他文献

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{{ truncateString('Lora Harris', 18)}}的其他基金

Collaborative Research: Implementation Grant: Active Societal Participation In Research and Education
合作研究:实施补助金:社会积极参与研究和教育
  • 批准号:
    2326774
  • 财政年份:
    2024
  • 资助金额:
    $ 34.07万
  • 项目类别:
    Continuing Grant
NSF INCLUDES: Supporting Emerging Aquatic Scientists (SEAS) Islands Alliance
NSF 包括: 支持新兴水生科学家 (SEAS) 岛屿联盟
  • 批准号:
    1930869
  • 财政年份:
    2019
  • 资助金额:
    $ 34.07万
  • 项目类别:
    Cooperative Agreement
Collaborative Reserach:Active Societal Participation in Research and Education
合作研究:社会积极参与研究和教育
  • 批准号:
    1645467
  • 财政年份:
    2016
  • 资助金额:
    $ 34.07万
  • 项目类别:
    Standard Grant

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