Modelling Studies of Coupled Biological-Physical Processes Affecting Recruitment on Georges Bank

影响乔治银行招募的生物物理耦合过程的建模研究

• 批准号: 9529402
• 负责人: Glen Gawarkiewicz
• 金额: $ 17万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529402&HistoricalAwards=false
• 关键词: Modelling; Studies; Coupled; Biological; Physical

The project involves the development of a series of coupled biological-physical models to examine the effects of wind forcing and seasonal stratification on the recruitment of zooplankton and fish to Georges Bank. These models will examine the influence of transient and seasonal forcing of an idealized bank ecosystem, with the goal of elucidating the mechanisms which lead to trophic uncoupling. Trophic uncoupling results from spatial or temporal dislocation of populations within a community, and can lead to rapid growth or depletion of affected populations. Physical modelling will focus on the response of an idealized bank and bank-shelf system to wind forcing and to seasonal buoyancy forcing. The biological modelling will have three major objectives: (1) to understand the long term effects of `wash out` events and advective losses on trophic interactions and recruitment; (2) to study the mechanisms by which the dynamics at tidal fronts influence trophic coupling and production; and )3) to explore novel techniques of reducing complexity of biological models while maintainin g biological system necessary for robustness. The ultimate goal of this work is to investigate the couplings between the biological and physical systems, in particular the effect of advective losses on recruitment of cod and haddock and the influence of tidal fronts on primary and secondary production. These results can then be tested by, and used to guide the upcoming field observations and further analysis of historical data.

该项目涉及开发一系列生物物理耦合模型，以研究风力强迫和季节性分层对乔治浅滩浮游动物和鱼类补充的影响。 这些模型将研究理想化河岸生态系统的瞬时和季节性强迫的影响，目的是阐明导致营养解耦的机制。 营养解耦是由群落内种群的空间或时间错位造成的，并可能导致受影响种群的快速增长或减少。 物理模型将重点关注理想化的堤岸和堤岸-货架系统对风力和季节性浮力强迫的响应。 生物模型将具有三个主要目标：（1）了解“冲刷”事件和平流损失对营养相互作用和补充的长期影响； (2) 研究潮汐锋动态影响营养耦合和生产的机制； )3) 探索降低生物模型复杂性同时保持生物系统稳健性所需的新技术。 这项工作的最终目标是研究生物和物理系统之间的耦合，特别是平流损失对鳕鱼和黑线鳕补充的影响以及潮汐锋对初级和次级生产的影响。 然后可以对这些结果进行测试，并用于指导即将进行的现场观察和历史数据的进一步分析。