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(a and b) Chlorophyll a (Chl. a), phosphate, and POC in tank 1 (a) and tank 3 (b), which were amended with NO3− and NH4+, respectively. (c and d) Abundances of free-living and attached bacteria in tank 1 (c) and tank 3 (d) are presented as stacked bars, which sum to total bacterial abundance. (e and f) Abundances of virus and flagellates in tank 1 (e) and tank 3 (f). Error bars indicate SD.
