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

基本信息

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

项目摘要

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.

生物海洋学的一个主要重点是了解和量化温度和资源可用性对世界海洋浮游植物生产力和生态系统动态的影响。埃普利温度曲线等经典范式以及李比希和莫诺的资源响应关系很好地服务于该领域，但它们未能捕捉资源可用性和温度对初级生产影响的完整动态和交互性质。这一缺点对于地球系统建模者来说尤其成问题，因为他们迫切需要估计未来海洋生产力水平，而海洋生产力水平支撑着海洋生态系统的预计变化，这些特性需要为政策制定者提供信息，例如IPCC和IPBES的评估报告。该提案描述了两名美国海洋微生物学家和一名英国生物地球化学建模师之间密切协调的合作项目，该项目将应用元素利用效率（EUE）的新兴概念，将灵活的热和资源限制响应整合到新一代地球系统模型中。 EUE 定义为每单位时间每单位细胞营养资源固定的碳量。这个简单而新颖的概念提供了一个独特的机会，可以将同时变暖和营养物质供应变化对海洋模型中初级生产力的观察到的后果结合起来，以量化快速变化的海洋环境中的生物地球化学和生物反应。