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Fig. 2. Schematic diagrams of the controlled Eh/pH microcosms (CEPMs, top) and tide simulation mesocosms (TSMs, bottom) used in the current study. Top: (1) gas (air nitrogen) inlet; (2) Pt working electrode (two per CEMP); (3) saturated calomel reference electrode; (4) Agar/KCl salt bridge; (5) thermometer; (6) solid and liquid phase volatile organic traps; (7) combination pH electrode; (8) Teflon stir bar. Bottom: (1) light banks with timers; (2) plants; (3) sediment; (4) agricultural mesh and burlap; (5) oyster shells; (6) pumps; (7) cobble stones; (8) reservoirs; (9) simulated tide range; (10) 300-gallon enclosure; (11) data loggers; (12) shielded wire lead bundles; (13) data output to computer (BNC).
