Search results for: alexandrium

The Behavioral Repertoire of Dinoflagellates: High-speed, High-resolution Imaging of Ecologically Important Species-Species Interaction Dinoflagellates play a diverse set of roles in marine food webs, serving as predators, prey and primary producers. The interactions that dinoflagellates have with other planktonic organisms and with each other underlie many of the processes that regulate ocean ecosystems and biogeochemical…

Imaging FlowCytobot (IFCB) Alexandrium images captured by the IFCB The Imaging FlowCytobot (IFCB) developed by Drs. Rob Olson and Heidi Sosik at the Woods Hole Oceanographic Institution.  The IFCB is a submersible or benchtop device that combines the fluorescence detection capabilities of the flow cytometer with the imaging and species identification capabilities of the FlowCam.…

Origin and Fate of HABs in the Arctic Warming ocean temperatures and decreasing ice cover will likely expand the spatial and temporal window for HABs in the Arctic. Multiple HAB toxins are present in the Arctic food web, evidenced by observations of toxins and toxic cells in the region as well as high prevalence of…

Our work spans the spectrum from mesoscale investigations of algal bloom dynamics to studies at the cellular and molecular levels. Projects We conduct field programs investigating the population dynamics of HAB species in various habitats, from shallow salt ponds to open coastal waters. We study the biological, chemical, and physical factors which regulate the growth and…

Fiber Optic Microarray to Detect and Enumerate Harmful Algal Bloom Species Harmful algal blooms (HABs) have become a serious threat to coastal resources worldwide, causing impacts ranging from the contamination of seafood products with potent toxins to widespread mortalities of wild and farmed fish and other marine animals. In the U.S., thousands of miles of…

En-Gen: Gene expression and harmful algal bloom dynamics Lead PI:  J. Hackett, University of Arizona. Co-PIs:  D.M. Anderson (WHOI), D. Bhattacharya (U. of Iowa), and D.L. Erdner (University of Texas) The overall goal of this project is to identify the key cellular processes involved in harmful algal blooms (HABs), commonly called “red tides”. HABs pose…

A comprehensive comparative genomic approach for identifying the saxitoxin synthesis genes Lead PI:  G. Plumley, Bermuda Institute of Ocean Sciences. Co-PIs:  D.M. Anderson (WHOI), D. Bhattacharya (U. of Iowa), J.D. Hackett (U. of Arizona) and J. Loram (Bermuda Institute of Ocean Sciences) Paralytic shellfish poisoning (PSP) is a potentially fatal syndrome associated with the consumption…

GOMTOX Dynamics of Alexandrium fundyense distributions in the Gulf of Maine An observational and modeling study of nearshore and offshore shellfish toxicity, vertical toxin flux, and bloom dynamics in a complex shelf sea. The Gulf of Maine (GoM) and its adjacent southern New England shelf is a vast region with extensive shellfish resources, large portions of which…

Investigations of toxic red tides and groundwater nutrient fluxes in the Nauset Marsh Estuary, Cape Cod National Seashore   PIs Donald M. Anderson, David Ralston This project is combining detailed field and laboratory studies to examine the population dynamics of harmful algal blooms (HABs) in the Nauset Marsh Estuary (NME), and relate hydrodynamics, and groundwater…

Enhanced monitoring of harmful algal bloom dynamics and toxicity using real-time observations from co-deployed, automated biosensors PIs: Donald M. Anderson, Michael L. Brosnahan, Juliette L. Smith, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543 and Gregory J. Doucette NOAA/NOS/NCCOS – Marine Biotoxins Program, Charleston, S.C., 29412 Blooms of the dinoflagellate Alexandrium fundyense cause annual shellfish closures along…