Understanding photosynthetic biofilm productivity and structure through 2D simulation.

Autor: Polizzi B; Laboratoire de Mathématiques de Besançon, Université Bourgogne Franche-Comté, CNRS UMR-6623, Besançon, France., Fanesi A; LGPM, CentraleSupélec, Université Paris Saclay, Gif-sur-Yvette, France., Lopes F; LGPM, CentraleSupélec, Université Paris Saclay, Gif-sur-Yvette, France., Ribot M; IDP, Université d'Orléans, CNRS, UMR CNRS 7013, Orléans, France., Bernard O; Université Côte d'Azur, INRIA, INRAE, CNRS, Sorbonne Université, BIOCORE, France.; LOV-UPMC-CNRS, UMR 7093, Station Zoologique, Villefranche-sur-mer, France.
Jazyk: angličtina
Zdroj: PLoS computational biology [PLoS Comput Biol] 2022 Apr 04; Vol. 18 (4), pp. e1009904. Date of Electronic Publication: 2022 Apr 04 (Print Publication: 2022).
DOI: 10.1371/journal.pcbi.1009904
Abstrakt: We present a spatial model describing the growth of a photosynthetic microalgae biofilm. In this 2D-model we consider photosynthesis, cell carbon accumulation, extracellular matrix excretion, and mortality. The rate of each of these mechanisms is given by kinetic laws regulated by light, nitrate, oxygen and inorganic carbon. The model is based on mixture theory and the behaviour of each component is defined on one hand by mass conservation, which takes into account biological features of the system, and on the other hand by conservation of momentum, which expresses the physical properties of the components. The model simulates the biofilm structural dynamics following an initial colonization phase. It shows that a 75 μm thick active region drives the biofilm development. We then determine the optimal harvesting period and biofilm height which maximize productivity. Finally, different harvesting patterns are tested and their effect on biofilm structure are discussed. The optimal strategy differs whether the objective is to recover the total biofilm or just the algal biomass.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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