Current Status and Historical Trends of Brown Tide and Red Tide ...

Pages: 129-132Publisher: Elsevier Science Publishing Company, Inc., New YorkKey words: brown tide, Narragansett Bay, bloom, chrysophyte, Aureococcus anophagefferensSummary: The A. anophagefferens bloom during May-September 1985 in Narragensett Bayproduced densities as high as 1.2 x 10 9 cells/liter; mean abundance was stronglycorrelated (r = 0.98) with the observed salinity gradient, though authors suggestthat salinity per se was not a causative factor. Neither was eutrophication, forstrong inverse correlations appeared between mean abundance and "ammoniumplus nitrate" and phosphate concentrations (-0.76 and -0.62, resp.). Diatoms,dinoflagellates, microflagellates and euglenids bloomed concurrently andextensively, with euglenids persisting through November once the brown tidebloom disappeared. Authors postulate that simultaneous brown tide blooms inLong Island and New Jersey indicate a mesoscale scenario associated withclimatologic/hydrographic conditions. Spring increases in quantity or duration oflight and concentrations of phagotrophic flagellates may be bloom catalysts.Methods: None specified. See “Materials and Methods.”QA/QC: None. See “Materials and Methods.”Contact: Theodore J. SmaydaSource Inst.: Graduate School of Oceanography, University of Rhode Island, Kingston, RhodeIsland 02881 USAAuthor: Smayda, T. J. and Villareal, T. A.Date: 1989Title/Ch.: The 1985 ‘brown-tide’ and the open phytoplankton niche in Narragansett Bayduring summerBook: Novel Phytoplankton Blooms: Causes and Impacts of Recurrent Brown Tides andOther Unusual Blooms, Coastal and Estuarine Studies 35Editor: E. M. Cosper, V. M. Bricelj and E. J. CarpenterPages: 159-187Publisher: Springer-VerlagKey words: brown tide, phytoplankton, Narragansett Bay, chrysophyte, Aureococcusanophagefferens, bloom, nicheSummary: The authors call attention to the lack of information on the presence andabundance of other phytoplankton species before, during and after a bloom andsuggest that such information may be crucial to a complete understanding ofbloom dynamics. Smaller-scale but significant blooms of several diatom,dinoflagellate and other phytoflagellate species (a total of 14 other taxa) cooccurredwith and/or followed the major A. anophagefferens bloom at differenttimes and for various durations during May-October 1985 in Narragensett Bay.As a result, one may view blooms of these other taxa after the A. anophagefferensbloom ceased as exploitations of the niche previously dominated by A.anophagefferens. Future blooms should not be considered monospecific unless soproven.Methods: See “Methods.”QA/QC: None per se; see “Methods.”Contact: Theodore J. Smayda148