The Role of Biologically Produced Structure in Deep-Sea Community Organization

生物产生的结构在深海社区组织中的作用

• 批准号: 8811920
• 负责人: James Eckman
• 金额: --
• 依托单位: Skidaway Institute of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-10-15 至 1990-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8811920&HistoricalAwards=false
• 关键词: Role; Biologically; Produced; Structure; Deep; Role; Biologically; Produced; Structure; Deep

Recent work in deep-sea, soft-substratum communities suggests that species' abundances are strongly affected by processes at centimeter-to-millimeter scales and that many of these processes are governed by biologically produced structures (e.g., animal tubes). However, no mechanistic understanding of the role of such structures in deep-sea community dynamics has been obtained. Dr. Eckman and collaborator Dr. Thistle are evaluating mechanisms by which the 2-cm-diameter sediment concretions built by polychaetes affect harpacticoid copepod abundances in the San Diego Trough. In particular, their efforts will be focused on testing responses to fluid- and particle-dynamic effects of sediment concretions. They have used the submersible ALVIN to sample individual sediment concretions and bare areas of the sea floor and to initiate in situ experiments. They will complete analysis of samples, which were obtained in previous cruises. The analysis of these samples will enable the determination the importance of hydrodynamic and predation-refuge effects created by these structures. The former, in particular, are likely to be especially important in the deep ocean, because of the relatively low rates of physical disruption of sediments there. Further, sediment concretions are comparable in size to other widespread, deep-sea structures (e.g., ferromanganese nodules). generalizable.

在深海中，软含量群落的最新工作表明，物种的丰度受到厘米至毫米尺度的过程的强烈影响，其中许多过程受生物生产的结构（例如动物管）的控制。但是，尚未获得对此类结构在深海社区动态中的作用的机械理解。 Eckman博士和合作者Thistle博士正在评估由多chaetes建造的2厘米直径沉积物混凝土影响圣地亚哥槽中的大脊果copepod丰度的机制。特别是，他们的努力将集中在测试对沉积物混凝土流体和颗粒动力作用的反应上。他们已经使用潜水的Alvin品尝单个沉积物凝结和海底的裸露区域，并启动原位实验。他们将完成对先前巡航中获得的样品的分析。这些样品的分析将确定这些结构产生的流体动力和捕食效应的重要性。特别是前者在深海中可能尤其重要，因为那里的沉积物的物理破坏率相对较低。此外，沉积物混凝土的大小与其他广泛的深海结构（例如，铁龙就是鼻结构）相当。可推广。