Optimality-based model of marine zooplankton communities

二氧化碳在表层海洋有机物质中的固定及其随后的再矿化、输出到深海或转移到更高的营养水平是由初级(浮游植物)和次级(细菌、浮游动物等)的相互作用决定的。海洋浮游生物系统的生产者。虽然各种浮游植物在碳和几种宏观和微量营养素的生物地球化学循环中的作用已经被详细阐明，但对世界海洋不同浮游动物群落的发展、分布和功能知之甚少。浮游动物摄食通常用食物密度的S形函数来描述，它可以描述某些种类的浮游动物，但肯定不能描述大多数种类。最近推出的大小光谱配方允许对不同营养水平进行精细化处理，但仍仅限于与不同浮游动物种群相关的摄食模式的微小差异。该项目旨在描述功能性浮游动物群落结构，反映在每个营养水平朝着最佳资源利用的进化。基于最优化和新陈代谢的建模将需要确定浮游动物摄食行为的不同方面之间的权衡。最近开发的适应性建模方法将用于将不同的摄食策略整合到一个足够简单的浮游动物模型中，以便在全球生物地球化学模型中使用。

The fixation of CO2 into organic matter in the surface ocean and its subsequent remineralisation, export to the deep sea, or transfer to higher trophic levels is determined by the interplay of primary (phytoplankton) and secondary (bacteria, zooplankton, etc.) producers in marine plankton systems. While the roles of various phytoplankton groups in the biogeochemical cycling of carbon and several macro- and micronutrients have been elucidated to some detail, far less is known about development, distribution, and functioning of different zooplankton communities throughout the world ocean. Zooplankton ingestion is commonly described by sigmoidal functions of food density, which can describe some but certainly not most kinds of zooplankton. The recently introduced size-spectral formulations allow refined treatment of different trophic levels but remain confined to only slight variations in the feeding models associated with different zooplankton groups. This project aims at a description of functional zooplankton community structure reflecting evolution towards optimal resource utilisation at each trophic level. Optimality- and metabolism-based modelling will require identification of trade-offs among different aspects of zooplankton feeding behaviour. The recently developed methodology of adaptive modelling will be used to integrate different feeding strategies into a zooplankton model simple enough for use in global biogeochemical models.