Search results for: alexandrium

From Mud to Microscope: Sediment Processing Alexandrium catanella cysts   Anushka Rajagopalan  6/27/23 Alexandrium catenella is a neurotoxin-producing dinoflagellate that can proliferate into a Harmful Algal Bloom (HAB). This species begins its life cycle as a resting cyst on the seafloor which then germinates into cells that can photosynthesize and create toxic blooms. Many researchers are…

Mating incompatibility among toxic and non-toxic populations of Alexandrium Harmful algal blooms (HABs) are a serious and growing problem in the US and the world. Impacts include the illness and death of human consumers of contaminated seafood, mass mortalities of fish and marine animals, deterioration of coastal esthetics and water quality, and broadly based ecosystem impacts.…

Toxic Alexandrium blooms in the Nauset Marsh System The Nauset Marsh System (NMS) is a unique and valuable resource located in an area with significant and growing development pressures.  Shellfishing is a major commercial and recreational activity, but over the past decade, that resource has been impacted on virtually an annual basis by outbreaks of paralytic shellfish…

Deposition and resuspension of Alexandrium fundyense resting cysts in the Gulf of Maine: Phase II The Gulf of Maine (GOM) supports productive shellfisheries frequently impacted by paralytic shellfish poisoning (PSP) – a serious threat to human health caused by the toxic dinoflagellate Alexandrium fundyense. PSP is the most widespread of the poisoning syndromes associated with harmful…

Pan Arctic Alexandrium Dramatic changes are occurring in the Arctic, including rapid melting of glaciers, sea ice, and permafrost, and shifts in patterns of rain, snowfall and runoff. With present day warming leading toward massive reductions in ice cover, the biogeographic boundaries of a wide range of marine species at all trophic levels will be greatly…

PCM HAB: Suppression of Alexandrium blooms by resuspension and burial of resting cysts PIs:  Donald M. Anderson, David Ralston Despite the serious and growing problems posed by harmful algal blooms (HABs) in the U.S., progress has been slow in the area of bloom suppression or control. Here we propose a study that may help to…

Biological and Physical Controls of Alexandrium Bloom Initiation and Termination We are using the Nauset marsh system as a model to interrogate the various factors that drive red tide events. An important question in the study of harmful algal blooms (HABs) is what causes them to begin and end? While HABs are becoming increasingly prevalent,…

Behind the Scenes:  Day in the Life of a HAB Research Assistant   Anushka Rajagopalan  1/30/23 Studying Harmful Algal Blooms (HABs) is becoming an increasingly well-known area of science. Various scientists are conducting experiments in algal trends, species interactions, general monitoring of blooms and more. People who are interested in studying HABs may also be curious…