Collaborative Research on Biogeochemistry of Antarctic Dry Valley Lakes: Seasonality and Feedback Processes in Amictic Lakes Dominated by Internal Cycling
南极干谷湖泊生物地球化学合作研究:以内循环为主的非密克湖的季节性和反馈过程
基本信息
- 批准号:8817113
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:美国
- 项目类别:Interagency Agreement
- 财政年份:1989
- 资助国家:美国
- 起止时间:1989-03-01 至 1990-02-28
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Lake ecosystems in temperate zones are influenced both by seasonally-varying external forces and by internal biogeochemical cycling; however, hydrologic mixing and dilution may obscure the importance of some biogeochemical processes. In contrast, lakes in the Dry Valleys of Antarctica are influenced by a seasonality that is simple in the extreme, are stabilized by a permanent ice cover, and receive proportionately minor annual inputs of chemical constituents, including organic material and nutrients, from glacial meltwater streams. Therefore, these lakes are uniquely suited for the study of processes involved in the internal production and degradation of organic material. This study will focus on the chemical and biological changes occurring during the austral winter (constant darkness) and the austral summer (constant daylight) and on the interaction or feedback mechanisms between processes occurring in major zone of these lakes. The study will be accomplished by measuring key autotrophic and heterotrophic processes and related chemical parameters, by quantifying lake hydrology and by deploying sampling devices to operate during the winter. Knowledge of these lake ecosystems will enhance our understanding of internal biogeochemical cycling in other lakes.
温带的湖泊生态系统受到以下两种因素的影响: 季节性变化的外部力量和内部 地球化学循环;然而,水文混合和 稀释可能会掩盖一些地球化学物质的重要性, 流程. 相比之下, 南极洲受到季节性的影响, 在极端的情况下,被永久的冰盖所稳定, 每年投入少量化学品 成分,包括有机物质和营养物质, 冰川融水流 因此,这些湖泊 特别适合于研究涉及的过程, 有机物质的内部产生和降解。这 研究将集中在化学和生物变化 发生在南方的冬天(持续的黑暗), 南半球的夏天(持续的日光)和相互作用 或反馈机制之间发生的过程中, 这些湖泊的区域。 这项研究将通过以下方式完成: 测量关键的自养和异养过程, 相关的化学参数,通过量化湖泊水文 并通过部署采样装置在 冬天 了解这些湖泊生态系统将提高我们的 了解其他地区的内部地球化学循环 湖泊.
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Diane McKnight其他文献
The life aquatic in high relief: shifts in the physical and biological characteristics of alpine lakes along an elevation gradient in the Rocky Mountains, USA
- DOI:
10.1007/s00027-019-0684-6 - 发表时间:
2019-12-04 - 期刊:
- 影响因子:1.800
- 作者:
Kelly A. Loria;Diane McKnight;Dillon M. Ragar;Pieter T. J. Johnson - 通讯作者:
Pieter T. J. Johnson
Limnology of Humic Waters. Edited by J. Keskitalo & P. Eloranta
- DOI:
10.1023/a:1008185628482 - 发表时间:
2001-01-01 - 期刊:
- 影响因子:1.300
- 作者:
Diane McKnight - 通讯作者:
Diane McKnight
Diane McKnight的其他文献
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{{ truncateString('Diane McKnight', 18)}}的其他基金
Workshop on Next Generation Humic Isolates
下一代腐殖质分离物研讨会
- 批准号:
2028671 - 财政年份:2020
- 资助金额:
-- - 项目类别:
Standard Grant
Task Force to Re-envision the Network Office of the Long-term Ecological Research Program
重新构想长期生态研究计划网络办公室的工作组
- 批准号:
1355241 - 财政年份:2013
- 资助金额:
-- - 项目类别:
Standard Grant
The Role of Resource Legacy on Contemporary Linkages Between Biodiversity and Ecosystem Processes in a Cold Desert Ecosystem: The McMurdo Dry Valley LTER Program
资源遗产对寒冷沙漠生态系统中生物多样性和生态系统过程之间当代联系的作用:麦克默多干谷 LTER 计划
- 批准号:
1041742 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Continuing Grant
Acquisition and Upgrade of Instrumentation for Research on Transport and Reactivity of Dissolved and Particulate Organic Materials in Soils, Sediments, and the Atmosphere
购置和升级用于研究土壤、沉积物和大气中溶解和颗粒有机物质的传输和反应性的仪器
- 批准号:
0930048 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica
合作研究:南极洲科顿冰川河流系统中溶解有机物的生物地球化学演化
- 批准号:
0839027 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Standard Grant
Stream Ecosystem "Harshness" and Microbial Endemism in the McMurdo Dry Valleys
麦克默多干谷溪流生态系统的“严酷”和微生物特有现象
- 批准号:
0839020 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: Humics and Iron Redox Reactions in Bangladesh Aquifer
合作研究:孟加拉国含水层中的腐殖质和铁氧化还原反应
- 批准号:
0738910 - 财政年份:2008
- 资助金额:
-- - 项目类别:
Continuing Grant
Development and Management of the LTER Schoolyard Children's Book Series
LTER校园童书系列的开发与管理
- 批准号:
0742309 - 财政年份:2007
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island
合作研究:罗斯岛小马湖溶解有机物的生物地球化学
- 批准号:
0338299 - 财政年份:2004
- 资助金额:
-- - 项目类别:
Standard Grant
Collaborative Research: The Direct and Indirect Photolytic Fate of Persistent Organic Pollutants in Arctic Surface Waters
合作研究:北极地表水中持久性有机污染物的直接和间接光解归宿
- 批准号:
0097182 - 财政年份:2001
- 资助金额:
-- - 项目类别:
Continuing Grant
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