A model of physiological adaptation in unicellular algae

摘要: A simple growth model for unicellular algae is used to show that environmentally induced changes in cellular composition can be explained terms of controlled adjustments acting maximize the specific rate. The based on a division carbon into four distinct compartments: associated with photosynthetic apparatus, those components engaged macromolecular synthesis, structural and stored carbon. Flows material between compartments, cells their environment, are defined environmental conditions distribution amongst compartments. Given balanced under set conditions, there exists unique, optimal allocation which rate maximal. Changes this by light intensity, nutrient availability or temperature qualitatively similar compositional observed wide variety algal species. Empirical estimates each parameters derived reasonable quantitative agreement predicted behaviour attainable. parameter also illustrate influence cell size Under given function relating has single maximum. at maximal varies inversely intensity directly temperature. Such consistent some empirical observations factors natural phytoplankton communities.