| 项目编号: | 1644500
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| 项目名称: | RAPID: Effect of wildfire on stream mercury and organic carbon in a southern Appalachian forested watershed |
| 作者: | Todd Scanlon
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| 承担单位: | University of Virginia Main Campus
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| 批准年: | 2016
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| 开始日期: | 2016-08-01
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| 结束日期: | 2017-07-31
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| 资助金额: | 24084
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Biological Sciences - Environmental Biology
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| 英文关键词: | mercury
; carbon
; watershed
; stream ecosystem
; stream
; wildfire
; burned watershed
; stream flow
; rapid funding
; unburned watershed
; forested watershed
; nearby stream
; mercury transport
; unburned forested watershed
; organic carbon
; rocky mountain wildfire
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| 英文摘要: | Mercury is present in the environment in low concentrations, but can accumulate in food chains and can cause neurological damage to humans and wildlife. The dynamics of mercury in aquatic environments are coupled to the cycling of carbon in those environments. The movement of carbon and mercury in stream ecosystems is influenced by the terrestrial environment through which the stream passes, and when wildfires occur in the watershed, there can be increases in the amounts of carbon and mercury that are transferred from the land to the stream. In April and May of 2016, the Rocky Mountain wildfire within the Shenandoah National Park, Virginia, completely burned the watershed surrounding Twomile Run. That stream has been monitored for water quality since 1987 and will be paired with a nearby stream draining an unburned forested watershed, Paine Run, in a year-long study to assess the influence of wildfire on the transport of carbon and mercury from stream ecosystems. The results of this work will be shared with land managers within the Park as it may help inform their use of fire as a management tool. The research will provide training for an undergraduate student in field and laboratory techniques for measuring carbon and mercury in transport.
The research has the goal of determining the impacts of fire of the fluxes of carbon and mercury from forested watersheds in the mid-Atlantic region. The fluxes of carbon and mercury from Twomile Run that drains the burned watershed will be compared with those from Paine Run that drains an unburned watershed. Manual grab samples and automated highflow samples will be collected from the two watersheds over a 12-month period. The samples will be analyzed for pH, alkalinity, anions, cations, dissolved organic carbon, UV absorbance, total suspended sediments, volatile solids and mercury. Continuous estimates of stream flow will be used to calculate the flux of carbon and mercury from both watersheds and the data will also provide a detailed characterization of the spatial and temporal dynamics of those exports. To date, no studies of stream ecosystems have explored the impacts of fire on carbon and mercury transport, and this study will fill that knowledge gap. Because storms that occur immediately after a wildfire are expected to induce high levels of carbon and energy mobilization, RAPID funding is needed to make prompt sampling possible. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91694
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Todd Scanlon. RAPID: Effect of wildfire on stream mercury and organic carbon in a southern Appalachian forested watershed. 2016-01-01.
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