AUTHOR=Viviani Donn A. , Karl David M. , Church Matthew J. TITLE=Variability in photosynthetic production of dissolved and particulate organic carbon in the North Pacific Subtropical Gyre JOURNAL=Frontiers in Marine Science VOLUME=2 YEAR=2015 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2015.00073 DOI=10.3389/fmars.2015.00073 ISSN=2296-7745 ABSTRACT=
The partitioning of photosynthetically-derived organic carbon between particulate and dissolved phases has important implications for marine carbon cycling. In this study we utilized 14C-bicarbonate assimilation to quantify rates of photosynthetic production of both particulate and dissolved organic carbon (DOC) at Station ALOHA (22°45′N, 158°W) in the North Pacific Subtropical Gyre (NPSG). At near-monthly time scales over ~5 years, we examined retention of 14C-labeled organic matter by both glass fiber filters and 0.2 μm pore size polycarbonate membrane filters that are commonly used for measurements of 14C-based plankton productivity. Use of polycarbonate filters resulted in significantly lower (averaging 60%) estimates of 14C-production compared to glass fiber filters. Coincident measurements of chlorophyll