Cooccurrence of Elevated Urea Levels and Dinoffagellate Blooms in ...

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teria piscicida, have caused massive mortality of fish in natural .... Pfiesteria-like dinoffagellates: behavior, impacts, and environmental controls. Limnol.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Dec. 1999, p. 5594–5596 0099-2240/99/$04.00⫹0 Copyright © 1999, American Society for Microbiology. All Rights Reserved.

Vol. 65, No. 12

Cooccurrence of Elevated Urea Levels and Dinoflagellate Blooms in Temperate Estuarine Aquaculture Ponds† PATRICIA M. GLIBERT1*

AND

DANIEL E. TERLIZZI2

University of Maryland Center for Environmental Science, Horn Point Laboratory, Cambridge, Maryland 21613,1 and University of Maryland Sea Grant Extension Program and College of Agriculture and Natural Resources, College Park, Maryland 207422 Received 6 July 1999/Accepted 13 September 1999

In hybrid striped bass aquaculture ponds, dinoflagellate blooms were found on 10 of 14 occasions to co-occur with concentrations of urea in excess of 1.5 ␮M nitrogen. When urea levels were