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method to estimate grazing of microzooplankton and losses and growth rates in a large variety of marine and estuarine systems ranging from estuaries and coastal areas to open ocean waters (e.g., Bec et al., 2005; Dilution is a time-honored method in plankton ecology. Kirchman et al. (1982) proposed diluting natural planktonic communities with consumer or predator-free water to estimate growth in bacterioplank