[A-OS13] Marine ecosystems and biogeochemical cycles: theory, observation and modeling

[AOS13-07] Computationally efficient approaches for modeling the adaptive response of phytoplankton, including toxin production and Harmful Algal Blooms (HABs)

*S. Lan Smith¹ (1.Marine Ecosystem Research Group, RIGC, Japan Agency for Marine-Earth Science and Technology)

Keywords:ecosystem modeling, trait distribution, ecosystem function, physiology, biogeochemistry

I will present an overview of findings from a recent perspectives paper, which reviewed various approaches for modelling the biodiversity and adaptive capacity of marine plankton (Acevedo-Trejos et al. Modelling approaches for capturing plankton diversity (MODIV), their societal applications and data needs. Front. Mar. Sci. 9:975414, 2022), focusing on the most compact and computationally efficient approaches for capturing adaptive capacity. These are acclimative models, which represent individual-level responses to changing environmental conditions. Although acclimation strictly represents only intra-specific phenotypic and behavioral responses, these models are typically combined with other modeling approaches to substantially enhance the performance of plankton ecosystem models. Acclimative (ACC) models are now commonly incorporated into Plankton Functional Type (PFT) models to capture key aspects of functional diversity, albeit not fine details of biodiversity. I will also introduce some recently developed ACC+PFT models that allow compact, robust, and computationally efficient representations of plankton eco-physiology, associated biogeochemistry, and also certain Harmful Algal Blooms (HABs). Finally, I will briefly mention some promising possibilities for advancing model development and our understanding of the biodiversity and adaptive capacity of plankton ecosystems.