Biogeography of Chemoautotrophic Symbioses in Marine Oligochaetes

海洋寡毛类化学自养共生的生物地理学

• 批准号: 9314457
• 负责人: Colleen Cavanaugh
• 金额: $ 13.58万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-11-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314457&HistoricalAwards=false
• 关键词: Biogeography; Chemoautotrophic; Symbioses; Marine; Oligochaetes

Cavanaugh 9314457 This project will study the biogeography of chemoautotrophic symbioses in marine oligochaetes. The objectives are to answer the following questions: Are the symbionts species-specific? What are their phylogenetic relationships among each other, to symbionts from other marine phyla, and to free-living bacteria? Are the symbionts within a monophyletic host group themselves monophyletic? If they did not co-evolve with their host, is the symbiont distribution paralleled by its ecological or geographic distribution? These questions can be addressed with a technically straightforward approach by analyzing the ribosomal RNA sequences of the prokaryotic symbionts in hosts from four geographically distant locations (Bermuda, Belize, Australia and the New England coast). The significance of the project lies in its ability to characterize for the first time the taxonomy, phylogeny, and biogeography of chemoautotrophic symbionts in a phylum previously not investigated. The results will show how wide spread the symbioses are and contribute to a better understanding of the biodiversity of chemoautotrophic symbioses in marine habitats. ***

卡瓦诺9314457 本计画将研究海洋寡毛类中化能自养共生体的生态学。 目标是回答以下问题：共生体是否具有物种特异性？ 它们彼此之间、与其他海洋生物门的共生体之间以及与自由生活的细菌之间的系统发育关系如何？ 单系宿主群中的共生体本身是单系的吗？ 如果它们不与宿主共同进化，共生体的分布是否会受到其生态或地理分布的影响？ 这些问题可以解决一个技术上简单的方法，通过分析核糖体RNA序列的原核共生体在主机从四个地理上遥远的位置（百慕大，伯利兹，澳大利亚和新英格兰海岸）。 该项目的意义在于它能够首次描述以前未研究过的门中化能自养共生体的分类、发生和分布。 研究结果将显示共生体的广泛分布，并有助于更好地了解海洋栖息地中化能自养共生体的生物多样性。 ***