Biogeochemical Cycles of Carbon and Nitrogen in an Ice-Covered Volcanic Crater Lake

冰覆盖的火山口湖中碳和氮的生物地球化学循环

• 批准号: 0120435
• 负责人: Eric Gaidos
• 金额: $ 9.85万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-10-01 至 2003-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0120435&HistoricalAwards=false
• 关键词: Biogeochemical; Cycles; Carbon; Nitrogen; Ice

0120435Biogeochemical Cycles of Carbon and Nitrogen in an Ice-Covered Volcanic Crater LakeProject DescriptionThis is a 1 year research planning and exploratory proposal to investigate the microbial ecology of and ice-covered crater lake within the active Grimsvotn Volcano in Iceland. The proposal anticpates that there is an active microbial community under the Grimsvotn ice-covered lake. Because of the simplicity of the biogeochemical environment and its isolation from other inputs other than volcanic and glacial, it is suggested to be an excellent location to pursue coupled biocomplexity studies. The proposal will evaluate four hypotheses by sampling the lake through the ice using hot-water drilling equipment. Samples will be collected from different lake depths and examined using: microscopy, cultivation, stable isotopic analyses, molecular biological tools, C and N fixation assays, and phylogentic analysis of genes involved in N fixation.

0120435冰盖火山口湖中碳和氮的生物地球化学循环项目描述这是一项为期一年的研究计划和探索性建议，旨在调查冰岛格里姆斯沃恩活火山内冰盖火山口湖的微生物生态。该提案反对在格里姆斯沃顿冰盖的湖底存在活跃的微生物群落。由于生物地球化学环境的简单性以及它与火山和冰川以外的其他输入的隔离，它被认为是进行耦合生物复杂性研究的绝佳地点。该提案将通过使用热水钻探设备对冰层中的湖水进行采样，来评估四种假设。将从不同的湖泊深度采集样本，并使用显微镜、培养、稳定同位素分析、分子生物学工具、C和N固定分析以及参与N固定的基因的系统学分析进行检查。