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Diatom Logic: Rewritable active nematic circuits in tidal-flat ecosystems

At the ocean-land interface lies a critical yet largely ignored ecosystem of tidal flats[1]. These habitats are colonized by diatoms that form thin surface biofilms, creating ecosystem-scale cellular collectives stretching meters to kilometers[2-4]. How these collectives coordinate functions across vast spatiotemporal scales remains poorly understood. This task requires both long-distance…

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