Species Composition and Biodiversity in Mussel Bed Communities of Deep-Sea Hydrothermal Vents

9811410货车Dover本项目利用与贻贝床有关的动物群，探讨深海热液喷口的生物多样性和趋同模式，以便在各种空间、时间和背景尺度上进行比较，包括：㈠在一个喷口区内，㈡三年内每年在一个喷口区，㈢在一个脊段上不同年代的喷口区之间，iv）在单一洋脊系统上不同扩张速率的区段之间，以及v）在不同洋盆中的洋脊系统之间。在喷口生态和深海生态的讨论中，生物多样性在这些尺度上的对比一再出现，但迄今为止还没有定量信息可以进行比较，这项研究将从正在进行的大西洋中脊Lucky Strike贻贝床和阿拉斯加中南部海岸潮间带贻贝床的生物多样性比较中发展出来。一个密集的实地项目旨在对东太平洋海隆和大西洋中脊的各种贻贝床进行采样。实地项目主要是作为其他科学家开发的项目的附加项目。所有的巡航和采样都涉及使用阿尔文号。希望进行生物多样性比较研究的潜水地点包括东太平洋海隆的11 N、9 N和17 S（即，两个“快速”和“超快速”扩散段）和大西洋中脊的梅内兹·格温、好彩和蛇坑。海洋扩张中心的喷口生态系统提供了全球范围内碎片化集合种群的极端例子。这些社区的多样性和趋同模式将为社区结构的区域规模控制提供基本的见解。

9811410 Van DoverThis project addresses pattems of biodiversity and convergence at deep-sea hydrothermal vents using fauna associated with mussel beds for comparisons at various spatial, temporal and contextual scales, including: i) within a vent field, ii) annually at a single vent field over three years, iii) among vent fields of different ages on a ridge segment, iv) among segments of different spreading rates on a single ridge system, and v) between ridge systems in different ocean basins. Biodiversity contrasts at these scales repeatedly arise in discussions of vent ecology and deep-sea ecology, but to date there is no quantitative information to allow comparisons.This research will develop from an ongoing comparison of biodiversity at Lucky Strike mussel beds on the Mid-Atlantic Ridge and an intertidal mussel bed on the south central Alaskan coast. An intensive field program is designed to sample a variety of mussel bed sites on the East Pacific Rise and Mid-Atlantic Ridge. The field programs are envisioned primarily as add-ons to programs developed by other scientists. All cruises and sampling involve the use of the Alvin. Dive sites for comparative biodiversity studies are hoped to include 11 N, 9N and 17S on the East Pacific Rise (i.e., two "fast' and "superfast" spreading segments) and Menez Gwen, Lucky Strike, and Snake Pit on the Mid-Atlantic Ridge.Vent ecosystems on oceanic spreading centers provide extreme examples of fragmented metapopulations on a global scale. Patterns of diversity and convergence in these communities will provide fundamental insights into regional-scale control of community structure.