Sublethal effects of the toxic dinoflagellate Karenia brevis on marine copepod behavior
نویسندگان
چکیده
منابع مشابه
Vertical Migration of the Toxic Dinoflagellate Karenia Brevis and the Impact on Ocean Optical Properties
Vertical migration behavior is found in many harmful algal blooms; however, the corresponding impact on ocean optical properties has not been quantified. A near-monospecific population of the dinoflagellate Karenia brevis was encountered off the west coast of Florida. The community was tracked for 24 hours by following a Lagrangian drifter deployed at the beginning of the experiment. A suite of...
متن کاملEffects of harmful algal blooms on competitors: Allelopathic mechanisms of the red tide dinoflagellate Karenia brevis
Because competitive interactions may have led to adaptations enabling bloom-forming phytoplankton to dominate pelagic communities, we explored the allelopathic effects of one red tide dinoflagellate, Karenia brevis, on competing phytoplankton species. Exposure to waterborne compounds from natural K. brevis blooms resulted in growth inhibition or death for four of five co-occurring species teste...
متن کاملEffects of the dinoflagellate Karenia brevis on larval development in three species of bivalve mollusc from Florida.
The effects of Karenia brevis (Wilson clone) on larval survival and development of the northern quahog, Mercenaria mercenaria, eastern oyster, Crassostrea virginica and bay scallop, Argopecten irradians, were studied in the laboratory. Larvae were exposed to cultures of whole and lysed cells, with mean total brevetoxin concentrations of 53.8 and 68.9 microgL(-1), respectively. Survival of early...
متن کاملSex-related differential mortality of a marine copepod exposed to a toxic dinoflagellate
In this study we hypothesized that the sexes of the copepod Acartia hudsonica experience different mortalities when exposed to the toxic dinoflagellate Alexandrium fundyense. In laboratory experiments, we manipulated toxin dose and measured sex-specific mortality. We also used a split-family design to determine whether there were genetic influences on sex determination, and therefore on sex rat...
متن کاملCharacterization of an epoxide hydrolase from the Florida red tide dinoflagellate, Karenia brevis.
Epoxide hydrolases (EH, EC 3.3.2.3) have been proposed to be key enzymes in the biosynthesis of polyether (PE) ladder compounds such as the brevetoxins which are produced by the dinoflagellate Karenia brevis. These enzymes have the potential to catalyze kinetically disfavored endo-tet cyclization reactions. Data mining of K. brevis transcriptome libraries revealed two classes of epoxide hydrola...
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ژورنال
عنوان ژورنال: Journal of Plankton Research
سال: 2007
ISSN: 1464-3774,0142-7873
DOI: 10.1093/plankt/fbm016