Collaborative Research: IODP Expedition 336 Objective Research: The deep biosphere of young and oxic oceanic crust

合作研究：IODP Expedition 336 目标研究：年轻含氧洋壳的深层生物圈

• 批准号: 1405237
• 负责人: Heath Mills
• 金额: $ 15.7万
• 依托单位: University of Houston - Clear Lake
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-06-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1405237&HistoricalAwards=false
• 关键词: Collaborative; Research; IODP; Expedition; 336

The proposal addresses a fundamental aim of the ocean drilling program, namely to help characterize one of the largest and least studied ecosystems on Earth, the deep biosphere of the igneous crust buried below the ocean floor. The principal scientific objective of IODP expedition 336 is, in particular, to investigate the microbial population in basaltic crust from the North Pond area near the Mid-Atlantic Ridge. The study samples are weathered and porous basalts taken from beneath ~100 m of sediment in the North Pond area. The study proposes to determine both the diversity of the microbe population (using DNA) and its metabolic activity (using RNA). The PI?s will investigate the relationship between microbes in the basement and those in the water column and determine which metabolic pathways are used by the deep basement microbes. The study will also provide baseline data for the long-term biological observatories installed in the sub-seafloor basement during expedition 336. Understanding deep biosphere life is a major thrust of the new IODP science plan and has implications for understanding the limits of life. The NSF-funded C-DEBI (Center for Dark Energy Biosphere Investigations) program and Deep Earth Academy promote K-12 education and communicate the results of deep biosphere studies to broad technical and popular audience. An undergraduate student will be involved in the research.

该提案旨在解决海洋钻井计划的基本目的，即有助于描述地球上最大和最不研究的生态系统之一，这是埋在海底下方的火成岩的深层生物圈。 IODP Expedition 336的主要科学目标是调查来自中大西洋山脊附近北部池塘地区的玄武岩外壳的微生物种群。研究样品是风化的，从北池塘地区约100 m沉积物以下采集多孔玄武岩。该研究建议确定微生物种群的多样性（使用DNA）及其代谢活性（使用RNA）。 PI会研究地下室中的微生物与水柱中的微生物之间的关系，并确定深基底微生物使用了哪些代谢途径。这项研究还将为336年探险期间安装在下层地下室中安装的长期生物观测值提供基线数据。了解深层生物圈寿命是新的IODP科学计划的主要力量，并且对理解生活的局限性有影响。 NSF资助的C-DEBI（黑暗能源生物圈调查中心）计划和Deep Earth Academy促进K-12教育，并将深层生物圈研究的结果传达给广泛的技术和受欢迎的受众。一名本科生将参与研究。