Biogeochemistry of deep microbial ecosystems in the Mallik 5L-38 Gas Hydrate Research Well, Mackenzie River Delta, Canada

加拿大麦肯齐河三角洲 Mallik 5L-38 天然气水合物研究井深层微生物生态系统的生物地球化学

• 批准号: 5363919
• 负责人: Dr. Kai Mangelsdorf
• 金额: --
• 依托单位: Institut für Chemie und Biologie des Meeres (ICBM)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5363919?language=en
• 关键词: Biogeochemistry; deep; microbial; ecosystems; Mallik

In recent years the discovery of ubiquitous microbial life in the deep subsurface has changed our perception of the Earth´s biosphere. First assessments suggest the biomass of this so-called "deep biosphere" is approximately comparable to that of the Earth´s surface, thereby outlining the importance of this widely disseminated hidden world for global geochemical cycles. The opportunity to explore a microbial ecosystem in the deep biosphere in a terrestrial setting near a gas hydrate deposit using organic geochemistry is provided by the Mallik Gas Hydrate Research Well 5L-38, which is located at the northern edge of the Mackenzie River delta (Northern Territories, Canada) in a permafrost region. Our main goal, co-ordinated with a partner project on feedstock generation and networked with colleagues from Canada, USA, India and other scientists at GeoForschungsZentrum Potsdam, is to elucidate the occurrence and nature of deep microbial ecosystems in the well using biogeochemistry. Both the chemical and isotopic compositions of individual biomarkers will be employed to identify the sources of organic matter detritus and the type of living biomass. Sediments and bacterial cultures will come under detailed investigation.

近年来，在地下深处发现了无处不在的微生物生命，这改变了我们对地球生物圈的看法。初步评估表明，这个所谓的“深层生物圈”的生物量与地球表面的生物量大致相当，从而概述了这个广泛分布的隐藏世界对全球地球化学循环的重要性。Mallik天然气水合物研究井5L-38提供了利用有机地球化学技术在天然气水合物矿床附近的陆地环境中探索深层生物圈微生物生态系统的机会，该井位于麦肯齐河三角洲（加拿大北部地区）的永久冻土区北部边缘。我们的主要目标是利用生物地球化学技术，与来自加拿大、美国、印度和波茨坦GeoForschungsZentrum Potsdam的其他科学家合作，协调原料生成的合作伙伴项目，阐明井中深层微生物生态系统的发生和性质。单个生物标志物的化学和同位素组成将被用来确定有机物碎屑的来源和生物质的类型。沉积物和细菌培养将得到详细的调查。