WHOI-R-93-006 Anderson, D.M. an Immunof
J ournal of Plankton Research Vo1.15 no.5 pp.563-580, 1993 An immunofluorescent survey of the brown tide chrysophyte A ureococcus anophagefferens along the northeast coast of the United States Donald M.Anderson, Bruce A.Keafer, David M.Kulis, Robert M.Waters 1 and Robert Nuzzi 1 Woods Hole Oceanographic Institution, Biology Department, Woods Hole, MA 02543 and 1 Suffolk County Department of Health Services, Evans K. Griffing County Center, Riverhead, NY JJ 901, USA Abst ract. Surveys were conducted along the northeast coast of the USA, be1ween Po rtsmouth, NH, and I he Chesapeake Bay in 1988 and 1990, to determine the population distribulion of Aureococcus anoplwgefferens, lhe chrysophyte responsible for massive and destructive 'brown tides' in Long Island and Narraganselt Bay beginning in 1985. A species-specific immunofluorescent technique was used to screen water samples, with positive identification possible at cell concentrations as low as 10- 1 20 cells ml - • Bolh years, A.anophagefferens was detected at numerous stations in and around Long Island and Barnegat Bay, J , typically at high cell concentrations. To the north and south of this 'center·, nearly half of the remaining stations were positive for A.anophagefferens, but the cells were always at very low cell concentrations. Many of the positive identifications in areas distant from Long Island were in waters with no known history of harmful brown tides. The species was present in both open coastal and estuarine locations, in salinities between 18 and 32 prac1ical salinity units (PSU). The observed population distributions apparently still reflect the massive 1985 outbreak when this species first bloomed, given the number of positive locations and high abundance of A.anophagef ferens in the immediate vicinity of Long Island.
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