You are here: Home › HABS > Research on Alexandrium inthe Gulf of Maine
Research on Alexandrium in the Gulf of Maine
Regional Ecosystems Research on Alexandrium in the Gulf of Maine
A concerted effort to understand Alexandrium dynamics in the Gulf of Maine began with the NOAA and NSF-supported ECOHAB-Gulf of Maine project in 1998. Since then, NOAA and a variety of other federal agencies have continued this effort either by providing funding (NOAA, NSF, NIEHS, EPA, NASA) or participating as partners in research projects (NOAA, FDA, USGS). The research has culminated in the ability to accurately forecast both the severity of the coming bloom season (based on predictive models and maps of seed-like cysts) and the bloom’s progression and status throughout the bloom.
Prediction for 2009 Bloom SeasonNOAA CSCOR Funded Research Provides Knowledge Base to Aid New England Red Tide Prediction and Response
CSCOR provided $18 million for research on Alexandrium in the Gulf of Maine from 1998 to 2008 through ECOHAB, MERHAB, and HAB Event Response. The knowledge gained from this decade of research significantly enhanced response capabilities in the region. New molecular methods for rapidly detecting and mapping Alexandrium are now used to track the bloom in almost real-time. These data, combined with oceanographic and meteorological data from ships and moorings, are used in a coupled biological and physical model to forecast the spread of the red tide. This forecast is used to provide weekly updates of probable bloom magnitude and location to marine resource managers so they can focus sampling. The model, coupled with new cyst maps, is also used to predict the bloom potential prior to the bloom season. This integration of ocean observing system data with models during bloom events is an example of the predictive, regional, ecosystem-based research being conducted at NOAA to assist managers and the public in understanding and responding to coastal ocean issues.
“GOMTOX” Project Expands Research to New Areas of the Gulf of Maine
The ongoing ECOHAB-funded ‘GOMTOX’ project extends past coastal studies to the larger Gulf of Maine in order to establish a comprehensive regional-scale understanding of Alexandrium bloom dynamics, transport, and associated shellfish toxicity. The project builds on data collected during the historic 2005 red tide, which led to closure of both nearshore shellfish beds and offshore beds in federal and state waters out to Georges Bank. The research aims to help managers, regulators, and the shellfish industry fully utilize and effectively manage both nearshore and offshore shellfish resources. For more on the GOMTOX project, visit WHOI’s GOMTOX project page.
Cyst Maps Help Predict Red Tide Potential
Seeds or “cysts” of Alexandrium are deposited on the seafloor as each year’s bloom declines. Around the beginning of April each year, the cysts naturally germinate and turn into cells that swim up from the seafloor and, by the end of April, begin to appear in large numbers in the waters off coastal Maine. Maps showing abundance and distribution of cysts on the seafloor are an important piece of information for annual forecasts. Wind is another critical factor that affects landfall and geographic extent of the bloom. Annual cyst maps have been funded through ECOHAB and Event Response since 2004.
Cyst surveys last fall showed about 40% fewer cysts than before the large 2008 event, but still more than before the large regional event of 2006, suggesting another moderately large event for 2009 .
Collaborative Response to Bloom Events
- Shellfish closure ( Maine summer 2004) in which NOAA research played a key role
- 2005 Alexandrium Bloom
- 2006 Alexandrium Bloom
- 2008 Alexandrium Bloom
- 2009 Alexandrium Bloom
Information About CSCOR HAB Programs & other Alexandrium Research in the Northeast
- NOAA CSCOR’s ECOHAB, MERHAB, HAB Event Response and HAB PCM Programs
- NOAA and other agency HAB projects related to Alexandrium in the Northeastern US (PDF)
- Woods Hole Center for Oceans and Human Health (supported by NSF and NIEHS)
Press Releases for NOAA Funded Studies on Harmful Algal Blooms in the Gulf of Maine
- NOAA awards WHOI $7.5 million over five years to Extend Harmful Algal Bloom Models and Forecasts to new areas of the Gulf of Maine
- NOAA awards Woods Hole Oceanographic Institution $540,000 for future Harmful Algal Bloom monitoring and research
- NOAA awards more than $550,000 to the Woods Hole Oceanographic Institution to determine the sources of red tides
- NOAA awards more than $100,000 to Woods Hole Researchers to study economics of toxic shellfish poisoning in the Gulf of Maine