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Schematic illustrating the design of the process-exclusion experiments. Microbial biofilms on test panels developed for ships' hulls in Woods Hole seawater were tranferred to aquaria that were flushed with seawater that had been filtered, thereby excluding the organisms responsible for key microbial processes. Only the accumulation and production rates of phospholipids were directly measured; rates of dispersal, settlement, and grazing were determined by difference.
