| 项目编号: | 1701825
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| 项目名称: | DISSERTATION RESEARCH: Does a large detritus pool enhance ecosystem resilience in response to an episodic perturbation? |
| 作者: | William Renwick
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| 承担单位: | Miami University
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| 批准年: | 2017
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| 开始日期: | 2017-05-01
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| 结束日期: | 2018-04-30
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| 资助金额: | 15390
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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: | research
; detritus pool size
; nutrient
; doctoral dissertation improvement grant
; lake resilience
; hands-on research opportunity
; ecosystem resilience
; lake ecosystem resilience
; sediment
; detritus pool speed lake resilience
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| 英文摘要: | Storm water runoff can erode and transport high levels of sediment and nutrients to lakes. This export is especially pronounced in the Midwestern U.S., where large areas of agriculture have left exposed soils that easily wash away during storms. These large pulses of sediments and nutrients to lakes during storms can affect drinking water quality, recreational opportunities, and commercial and sport fishing. It is expected that storms in the Midwestern U.S. will increase in severity and frequency over the next 100 years. This Doctoral Dissertation Improvement Grant will provide funds to understand how lakes will respond to storms under these changing conditions. In addition, this project will directly support the research of one doctoral student, and will provide hands-on research opportunities for undergraduate students.
This research will experimentally examine what factors contribute to lake ecosystem resilience following storm events, using replicated aquatic mesocosms (5000 liter tanks) that simulate conditions during large storm events in a lake. This research will answer three general questions: (1) Do larger detritus pools speed lake resilience (the time necessary for ecosystems to recover) following large storm events? (2) How do additions of sediment and nutrients that occur during large storm events affect lake recovery time? and (3) How do additions of sediment and nutrients and detritus pool size interactively affect lake resilience? The experiment will include manipulations of detritus pool size, hydraulic flushing (a physical disturbance that reduces the amount of algae), and addition of sediment and nutrients. A factorial design will be used to isolate the mechanisms that influence lake recovery following large storm events. Understanding how these factors interact is essential to understanding ecosystem resilience and for effective management of water quality in lakes and reservoirs. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/90275
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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: | |
William Renwick. DISSERTATION RESEARCH: Does a large detritus pool enhance ecosystem resilience in response to an episodic perturbation?. 2017-01-01.
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