Ethological dynamics in diorama environments

Photosymbiosis, a phenomenon in which photosynthetic microalgae form an endosymbiotic relationship with other organisms, is widely observed in nature in both freshwater and seawater habitats. However, many aspects of the photosymbiotic crosstalk between symbiotic algae and their hosts remain unclear. Particularly, cell walls of algae in various photosymbiotic systems, often seen as an indigestible carbon resource so far, have recently begun to receive attention as a key factor. In this study, we focus on the metabolic fate of the cell wall and analyze its role in the ecosystem using experimental settings of diorama environments. Based on this, we will construct a model of photosymbiotic crosstalk at the cellular and molecular levels that incorporates the cell wall as a carbon resource, which has been overlooked in previous studies. We will also elucidate the behavioral principles of symbiotic algae, including the abiotic factors like the cell wall. Through these analyses, we aim to understand and generalize such photosymbiotic crosstalks.