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Phytoplankton biomass in a subtropical estuary: Distribution, size composition, and carbon:Chlorophyll ratios

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Abstract

The seasonal pattern of phytoplankton biomass (chlorophyll and particulate organic carbon) and the salinity-related pattern of phytoplankton biomass and size composition were determined in Apalachicola Bay, Florida, throughout 2004. Phytoplankton biomass was highest during summer and lowest during winter. During summer, phytoplankton biomass was highest in waters with salinity between about 5 and 23. In waters between 5 and 23, phytoplankton biomass was primarily (> 50%) composed of < 5 μm cells. The results from this study support the idea that a microbial food web characterizes mass and energy flow through the planktonic food web in Apalachicola Bay and other estuaries. During winter, the carbonxhlorophylla ratio averaged 56 ± 60 (standard deviation). During summer, the ratio ranged from 23 to 345, with highest values occurring in waters with salinity between about 8 and 22. The carbonxhlorophylla ratio was positively related to the percent of chlorophyll < 5 μm in size during summer.

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  1. J. N. Putland

    Present address: Center for Ocean Exploration, Harbor Branch Oceanographic Institution, 5600 U.S. 1 North, 34946, Fort Pierce, Florida

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  1. Department of Oceanography, Florida State University, 32306-4320, Tallahassee, Florida

    J. N. Putland & R. L. Iverson

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Putland, J.N., Iverson, R.L. Phytoplankton biomass in a subtropical estuary: Distribution, size composition, and carbon:Chlorophyll ratios. Estuaries and Coasts: J ERF 30, 878–885 (2007). https://doi.org/10.1007/BF02841341

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