Aquatic Sciences Meeting, Albuquerque 2001
| CS25 Organic Carbon Dynamics |
| Date: Wednesday, February 14, 2001, Time: 2:00:00 PM |
| Location: Acoma/Zuni/Tesuque |
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| Goes, J, I, Bigelow Laboratory for Ocean Sciences, W. Boothbay Harbor, ME 04575, USA, jgoes@bigelow.org |
| Balch, W, M, Bigelow Laboratory for Ocean Sciences, W. Boothbay Harbor, ME 04575, USA, bbalch@bigelow.org |
| Vaughn, J, , University of New England, Biddeford, ME 04005, USA, |
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| USING PARTICLE SIZE ANALYSIS TO UNDERSTAND THE FATE OF EXTRACELLULAR PRODUCTS RELEASED BY PHYTOPLANKTON |
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| The fate of extracellular products excreted by marine phytoplankton was examined using Flow Field-Flow Fractionation-measured sizes of the compounds released as an index of change. These investigations revealed large, phytoplankton age-related differences in the size spectra of the compounds, and, a tendency for the compounds to aggregate rapidly, to form larger particles following their release into the growth medium. Rates of aggregation were greater in cultures nearing senescence, but larger aggregates appeared to be more susceptible to breakdown and uptake by bacteria than smaller particles. The implications of these results for carbon cycling in the sea and ocean optics are discussed. |
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