Collaborative Research: The influence of mesoscale eddies on deep-sea dynamics and implications for larval connectivity along mid-ocean ridges

合作研究：中尺度涡流对深海动力学的影响以及对洋中脊幼虫连通性的影响

• 批准号: 2318966
• 负责人: Xinfeng Liang
• 金额: $ 31.16万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2026-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2318966&HistoricalAwards=false
• 关键词: Collaborative; Research; influence; mesoscale; eddies

This project will examine the impact of mesoscale eddies on deep ocean dynamics and larval dispersal among deep-sea vent communities and its consequences for population connectivity and resilience at the East Pacific Rise. This will be done using a multiscale numerical ocean model in comparison with observational data of larval supply and colonization. Hydrothermal vent communities on mid-ocean ridges are characterized by temporary habitats and dynamic populations. In these habitats, dispersal in the planktonic larval stage strongly influences resilience of metacommunities to both natural and human-made disturbance. At vents on actively spreading ridges, this process is particularly critical because catastrophic eruptions occur frequently.The research approach employs a multi-scale hydrodynamic model that incorporates a Lagrangian particle-tracking algorithm using available data on larval behaviors and ocean currents. The model will be used to simulate hydrodynamically mediated larval dispersal, which is not directly observable, for comparison with an analysis of observed larval supply and colonization. Multi-scale simulations will focus on oceanic and dispersal processes at the East Pacific Rise segments under the influence of passing mesoscale eddies during the 30-year period from 1993 to 2022. The investigators will examine the impact of eddies in the main thermocline on deep ocean dynamics and transport at different spatial scales and will compute statistics over many incidents of eddy-ridge interaction. Biological analyses will provide observational constraints on the model’s representation of larval behaviors through analysis of video footage of larval swimming.This project was funded by the Physical Oceanography and Biological Oceanography Programs.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将研究中海通风口群落之间对深海动态和幼体分散的影响，及其对东太平洋崛起对人口连通性和韧性的后果。与幼虫供应和定殖的观察数据相比，将使用多尺寸数值海洋模型进行此操作。海脊中的水热通风群社区的特征是临时栖息地和动态人群。在这些栖息地中，浮游幼体阶段的散布会强烈影响元社区对自然和人为灾难的弹性。在积极扩散山脊的通风口处，此过程尤其重要，因为灾难性喷发经常发生。该研究方法采用多尺度的流体动力模型，使用有关幼虫行为和洋流的可用数据结合了拉格朗日粒子跟踪算法。该模型将用于模拟流体动力学介导的幼体分散（不可直接观察），以与观察到的幼虫供应和定殖分析进行比较。在1993年至2022年的30年中，在传递中尺度涡流的影响下，多尺度模拟将重点关注东太平洋崛起细分市场的海洋和分散过程。研究人员将研究主要热跃层对涡流对深海动力学的影响对不同空间尺度的深海动态和运输的影响。生物学分析将通过分析幼虫游泳的视频镜头来对模型的幼虫行为表示观察性约束。该项目由物理海洋学和生物海洋学计划提供资金。该奖项反映了NSF的法定任务，并通过该基金会的知识优点和广泛的影响来评估NSF的法定任务。