Gene Flow and Species Diversity in Deep Sea Hydrothermal Vent Communities

深海热液喷口群落的基因流和物种多样性

• 批准号: 0241613
• 负责人: Robert Vrijenhoek
• 金额: --
• 依托单位: Monterey Bay Aquarium Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2008-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241613&HistoricalAwards=false
• 关键词: Gene; Flow; Species; Diversity; Deep

This project will continue population genetic and molecular systematic studies of organisms endemic to deep-sea hydrothermal vents and cold-water sulfide/hydrocarbon seeps. Oceanic expeditions over the past 14 years have amassed an extensive collection of ethanol- and cryopreserved specimens from most of the known vent and seep habitats in the world. These specimens will provide a foundation for assessing the evolutionary affinities of newly discovered taxa in biogeographical provinces that presently are poorly understood. Primary objectives are to explore two little known global regions that might provide historical or present-day connections between major biogeographical provinces in the deep-sea: the Easter Microplate region in the eastern Pacific and the Lau/Fiji Basins in the western Pacific. Specimens will be collected with manned or unmanned submersibles and preserved on board the support vessel for subsequent molecular and morphological studies. Molecular analyses (mostly DNA sequencing) will be conducted in a lab at the home institution. Population genetic analyses will focus on assessing genetic diversity and geographical structure, and on estimating modes of dispersal and rates of gene flow within species. Continuing systematic studies will focus on development of robust multi-gene phylogenies for the molluscan and annelid groups that dominate vents. This work will contribute to phylogeographic and systematic perspectives on the dominant species that live in these unusual abyssal communities. Numerous undergraduate, graduate, and post-doctoral students will benefit from laboratory and oceanographic experiences associated with this project. New information will be published in the professional literature and made available to the public through web-based resources and presentations.

该项目将继续对深海热液和冷水硫化物/烃渗漏的生物的种群遗传和分子系统研究。在过去的14年中，海洋探险已经积累了来自世界上大多数已知的通风口和渗漏栖息地的大量乙醇和冷冻保存标本。这些标本将为评估生物地理省份新发现的分类单元的进化亲和力提供基础，目前知之甚少。主要目标是探索两个鲜为人知的全球区域，这些地区可能会在深海的主要生物地理省之间提供历史或当今的联系：东太平洋的复活节微板岩地区和西太平洋的Lau/fiji盆地。标本将用载人或无人潜水物收集，并保存在支撑船上，以进行随后的分子和形态学研究。分子分析（主要是DNA测序）将在家庭机构的实验室中进行。人群遗传分析将集中于评估遗传多样性和地理结构，以及估计物种内基因流量的分散率和基因流量的模式。持续的系统研究将集中于为主导通风孔的软体动物和annelid群体的鲁棒多基因系统发育的发展。这项工作将有助于对生活在这些不寻常的深渊社区中的主要物种的植物地理学和系统观点。许多本科生，研究生和博士后学生将从与该项目相关的实验室和海洋学经验中受益。新信息将发表在专业文献中，并通过基于Web的资源和演示文稿向公众提供。