Collaborative Research: New Roles for Reactive Oxygen Species in Mediating Carbon Fluxes at the Terrestrial-Aquatic Interface
合作研究:活性氧在调节陆地-水生界面碳通量中的新作用
基本信息
- 批准号:2029645
- 负责人:
- 金额:$ 29.9万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-07-01 至 2024-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Wetlands in the north central region of the United States are important ecosystems that play critical roles in the regional carbon cycle and are likely to be dramatically affected by climate change. Rates of greenhouse gas release from these wetlands may increase with warming and offset their ability to sequester carbon. By studying the chemical and microbiological processes in wetland sediments over space and time, predictions of the effects of climate change on these critical habitats will be possible. Documentation of the ecological importance of this region via photography will demonstrate the value of wetlands to a broad audience.The drivers of biogeochemical activity that dictate the emissions of carbon dioxide and methane in small, inland waters are poorly constrained, yet processes in these water bodies play an oversized role in understanding climate change. One process that is poorly understood is the role of chemical reactions in mediating carbon dioxide and methane formation in small lakes and wetlands, especially the abiotic production of reactive oxygen species (ROS) at the sediment-water interface (SWI). The hypothesis for this project is that the reaction of reduced soluble and particulate forms of iron, sulfur, and carbon with trace level oxygen to form ROS at the SWI is an under-appreciated, yet critical, control on microbiological activity and the cycling of carbon in small inland water bodies. Using a combination of field work in the prairie pothole region of North Dakota, controlled laboratory experiments, and mesocosm studies, this work will 1) identify the geochemical drivers of ROS generation at the SWI, 2) determine spatiotemporal patterns of linked pore water chemistry and ROS at the SWI, and 3) track the generation of specific labile carbon substrates produced through ROS-DOM reactions that affect rates of carbon mineralization and methane production in small lake and wetland sediments. A combination of in situ voltammetry measurements, detailed characterization of dissolved and particulate organic matter, iron, and sulfur species, and microbial -omics analyses will be used to understand the coupled biogeochemical processes. A key component of this work is understanding how abiotic ROS driven reactions at the sediment-water interface lead to turnover of terminal electron acceptors and generation of labile microbial substrates. Establishing a baseline understanding of these processes is needed to predict changes in carbon dioxide and methane fluxes under different climate scenarios. The collected data will enable understanding of how biogeochemical cycles are maintained through coupled abiotic/biotic pathways, and how these processes impact carbon cycling in aquatic environments. This approach is also applicable to other systems and the cycling of other elements, such as nitrogen, which may be especially important in urban wetland regions. The societal benefit will be improved understanding of processes that influence, and are influenced by, climate change. To reach as broad an audience as possible regarding the importance of this region, a photographer will document the landscape and its ecological function during field sampling trips.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
美国中北部地区的湿地是重要的生态系统,在区域碳循环中发挥着关键作用,并可能受到气候变化的严重影响。这些湿地的温室气体释放率可能会随着变暖而增加,并抵消其固碳能力。通过研究湿地沉积物在空间和时间上的化学和微生物过程,将有可能预测气候变化对这些重要生境的影响。通过摄影记录这一地区的生态重要性将向广大观众展示湿地的价值。决定内陆小沃茨二氧化碳和甲烷排放的生物地球化学活动的驱动因素受到很大的限制,但这些水体中的过程在理解气候变化方面发挥着巨大的作用。一个过程是知之甚少的是化学反应的作用,介导的二氧化碳和甲烷的形成在小湖泊和湿地,特别是非生物生产的活性氧(ROS)在沉积物-水界面(SWI)。该项目的假设是,减少可溶性和颗粒形式的铁,硫和碳与微量氧在SWI形成ROS的反应是一个未被重视的,但关键的,控制微生物活性和碳在小内陆水体中的循环。通过结合北达科他州大草原坑洞区的野外工作、受控实验室实验和围隔生态系统研究,这项工作将1)确定SWI处ROS生成的地球化学驱动因素,2)确定SWI处相关孔隙水化学和ROS的时空模式,和3)追踪通过活性氧产生的特定不稳定碳底物的产生-影响小型湖泊和湿地沉积物中碳矿化和甲烷生成速率的DOM反应。结合原位伏安法测量,溶解和颗粒有机物,铁和硫物种的详细表征,和微生物组学分析将被用来了解耦合的地球化学过程。这项工作的一个关键组成部分是了解如何在沉积物-水界面的非生物活性氧驱动的反应,导致终端电子受体的营业额和不稳定的微生物底物的产生。为了预测不同气候情景下二氧化碳和甲烷通量的变化,需要建立对这些过程的基线了解。收集的数据将有助于了解生物地球化学循环如何通过耦合的非生物/生物途径维持,以及这些过程如何影响水生环境中的碳循环。这种方法也适用于其他系统和其他元素的循环,如氮,这可能是特别重要的城市湿地地区。社会效益将是提高对影响气候变化和受气候变化影响的过程的理解。为了让尽可能广泛的观众了解该地区的重要性,摄影师将在实地采样旅行期间记录景观及其生态功能。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(0)
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William Arnold其他文献
THE FIRST STEP IN PHOTOSYNTHESIS: EVIDENCE FOR ITS ELECTRONIC NATURE.
光合作用的第一步:其电子性质的证据。
- DOI:
10.1073/pnas.46.6.769 - 发表时间:
1960 - 期刊:
- 影响因子:11.1
- 作者:
William Arnold;Roderick K. Clayton - 通讯作者:
Roderick K. Clayton
The Ratio between Delayed Light and Fluorescence Emitted by Chloroplasts
- DOI:
10.1016/s0006-3495(72)86122-8 - 发表时间:
1972-07-01 - 期刊:
- 影响因子:
- 作者:
William Arnold - 通讯作者:
William Arnold
Proceedings from the 7th Annual International Society for Musculoskeletal Imaging in Rheumatology (ISEMIR) conference.
第七届国际风湿病肌肉骨骼影像学会 (ISEMIR) 年度会议论文集。
- DOI:
- 发表时间:
2013 - 期刊:
- 影响因子:5
- 作者:
O. Troum;O. Pimienta;Wolfgang A Schmidt;Mikkel Ostergaard;M. D’Agostino;Norman Gaylis;William Arnold;A. Ben;Veena Ranganath;Judy L Seraphine;C. Peterfy - 通讯作者:
C. Peterfy
SOME EFFECTS OF 2537 Å ON GREEN ALGAE AND CHLOROPLAST PREPARATIONS
2537 Å 对绿藻和叶绿体制剂的一些影响
- DOI:
- 发表时间:
1951 - 期刊:
- 影响因子:0
- 作者:
A. Holt;I. A. Brooks;William Arnold - 通讯作者:
William Arnold
Proceedings from the 5th Annual International Society for Musculoskeletal Imaging in Rheumatology Annual Conference
- DOI:
10.1016/j.semarthrit.2012.10.003 - 发表时间:
2013-02-01 - 期刊:
- 影响因子:
- 作者:
Philip G. Conaghan;Mikkel Ostergaard;Maria Antonietta D’Agostino;Norman Gaylis;William Arnold;Ewa Olech;Alvin Wells;Charles Peterfy;Judy L. Seraphine;Orrin Troum - 通讯作者:
Orrin Troum
William Arnold的其他文献
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{{ truncateString('William Arnold', 18)}}的其他基金
CAS: Fluorine Beyond PFAS: Pathways to Sustainable Fluorochemical Design Through Environmental Degradation Studies and Fluorine Mass Balances
CAS:超越 PFAS 的氟:通过环境退化研究和氟质量平衡实现可持续氟化物设计的途径
- 批准号:
2304963 - 财政年份:2023
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Collaborative Research: Environmental Fate and Impacts of Quaternary Ammonium Compounds Following Increased Use During the SARS-CoV‑2 Pandemic
合作研究:SARS-CoV-2 大流行期间季铵化合物使用量增加后的环境归宿和影响
- 批准号:
2051313 - 财政年份:2021
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Support for the 2018 Gordon Research Conference on Environmental Sciences: Water To held June 24-29, 2018 in Holderness, NH
支持 2018 年戈登环境科学研究会议:水于 2018 年 6 月 24 日至 29 日在新罕布什尔州霍尔德内斯举行
- 批准号:
1757459 - 财政年份:2018
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Planning Grant: Engineering Research Center for Advancing a Circular Water Economy (ACWa-Econ)
规划资助:循环水经济工程研究中心(ACWa-Econ)
- 批准号:
1840249 - 财政年份:2018
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Collaborative Research: Experimental and Computational Studies of the Role of Effluent Organic Matter in the Sensitized Transformation of Organic Contaminants
合作研究:废水有机物在有机污染物敏化转化中作用的实验和计算研究
- 批准号:
1434148 - 财政年份:2014
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Collaborative Research: Hydrology and Geochemistry of Prairie Pothole Lake Sedimentary Pore Waters: Implications for the Attenuation of Pesticides
合作研究:草原坑洞湖沉积孔隙水的水文学和地球化学:对农药减毒的影响
- 批准号:
1245135 - 财政年份:2013
- 资助金额:
$ 29.9万 - 项目类别:
Continuing Grant
Using triclosan and polyhalogenated dibenzo-p-dioxins to elucidate the importance of natural and anthropogenic sources of OH-PBDEs in fresh and estuarine waters
使用三氯生和多卤二苯并二恶英阐明淡水和河口水域中 OH-PBDE 天然和人为来源的重要性
- 批准号:
0967163 - 财政年份:2010
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Collaborative Proposal: Redox Processes in the Sedimentary Porewaters of Prairie Pothole Lakes: Implications for the Attenuation of Pesticides
合作提案:草原坑洼湖沉积孔隙水中的氧化还原过程:对农药减毒的影响
- 批准号:
0910692 - 财政年份:2009
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
Collaborative Research: Formation of Polyhalogenated Dioxins and Furans from Triclosan and PBDEs in Rivers
合作研究:河流中三氯生和多溴二苯醚形成多卤代二恶英和呋喃
- 批准号:
0606331 - 财政年份:2006
- 资助金额:
$ 29.9万 - 项目类别:
Standard Grant
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