Understanding the consequences of changing phytoplankton elemental use efficiencies for global ocean biogeochemistry

了解浮游植物元素利用效率变化对全球海洋生物地球化学的影响

• 批准号: NE/X014908/1
• 负责人: Alessandro Tagliabue
• 金额: $ 31.02万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FX014908%2F1
• 关键词: Understanding; consequences; changing; phytoplankton; elemental

A major focus of biological oceanography is to understand and quantify the effects of temperature and resource availability on phytoplankton productivity and ecosystem dynamics in the world ocean. Classic paradigms like Eppley's temperature curve and the resource response relationships of Liebig and Monod have served the field well, but they fail to capture the full dynamic and interactive nature of resource availability and temperature influences on primary production. This shortcoming is especially problematic for earth system modelers as they urgently try to estimate future oceanic productivity levels that underpin projected changes in the ocean ecosystem, properties that are needed to inform policy makers such as the assessment reports of the IPCC and IPBES. This proposal describes a closely coordinated collaborative project between two U.S. marine microbiologists and a biogeochemical modeler from the U.K. that will apply the emergent concept of Elemental Use Efficiencies (EUEs) to integrate flexible thermal and resource limitation responses into a new generation of earth system models. EUEs are defined as the amount of carbon fixed, per unit of cellular nutrient resource, per unit time. This simple, yet novel concept provides a unique opportunity to integrate the observed consequences of concurrent warming and altered nutrient availability for primary productivity in ocean models to quantify biogeochemical and biological responses in the rapidly changing ocean environment.

生物海洋学的主要重点是了解和量化温度和资源可用性对世界海洋中浮游植物生产力和生态系统动态的影响。诸如Eppley的温度曲线以及Liebig和Monod的资源响应关系之类的经典范式很好地为该领域提供了很好的服务，但是它们无法捕获资源可用性和温度对初级生产的影响的全部动态和互动性。对于地球系统建模者而言，这种缺点尤其是问题的，因为他们迫切地试图估计未来的海洋生产率水平，这些海洋生产力预测了海洋生态系统的变化，这是为了告知政策制定者（例如IPCC和IPBES评估报告）所需的属性。该提案描述了两位美国海洋微生物学家和来自英国的生物地球化学建模者之间的一个密切协作的合作项目，该项目将应用元素使用效率（EUE）的新兴概念将灵活的热和资源限制响应整合到地球系统模型的新一代模型中。 EUS定义为每单位时间固定的碳固定量，每单位营养资源。这个简单而新颖的概念提供了一个独特的机会，可以整合海洋模型中主要生产力的同时变暖和养分可用性改变的后果，以量化快速变化的海洋环境中的生物地球化学和生物学反应。