Red tide detection based on high spatial resolution broad band optical satellite data


Red tides also occur in the northeastern United States. The dinoflagellate species Alexandrium spp., particularly common along the North Atlantic and Pacific coasts of North America, is associated with red tides in these regions. Scientists are unsure of the cause of red tide and whether it is due to natural phenomena or human activity. Some parts of the world experience red tides only at certain times of the year, while others appear to occur only when human activity contributes to red tides. Some scientific studies have found that pollution that raises water temperature can increase the frequency of red tides. Other studies have found that nitrates and phosphates in agricultural wastewater can cause red tides Yet another study shows increased iron levels as a cause of red tide. However, a clear relationship between human activity and the occurrence of red tides is currently unknown. Sudden breeding explosion of algae (single-celled green aquatic plants) in large natural bodies of water such as lakes and seas. Flowers near the coast are sometimes called red tide. A class of neurotoxins produced by algae that cause red tides (coastal blooms). Brevetoxin and other toxins from algae flowers are concentrated by crustaceans and can poison shellfish eaters. Neurotoxins produced by algae that cause red tides (coastal blooms). Toxins from algal blooms, such as domoic acid and brevetoxin, accumulate in crustaceans and are toxic to crustacean eaters. The frequency of red tides has increased over the past 30 years, which may suggest that they are caused by human activity. But so far, scientists don't know for sure what causes red tide. It is also unclear why some dinoflagellate species produce harmful toxins and others do not. I'm trying Scientists are also interested in determining whether red tides are a natural phenomenon, caused by human activity, or both. Scientists are calling on governments to deploy better and more frequent red tide monitoring and detection systems. Although the annual mortality and serious illness rates from seafood poisoning are relatively low in the United States, new toxins emerge regularly, making it difficult to protect the environment and human health. . Red tide is the general name for the phenomenon that occurs when a bloom of toxic algae turns seawater red, killing marine life and making the water unfit for human or animal use. It is caused by some species of dinoflagellates and diatoms, microscopic single-celled phytoplankton that live in warm seas. When plankton are abundant, a red pigment called peridinin that collects light during photosynthesis turns the water red. red tides have plagued Florida's east and west coasts nearly every year since at least 1947. Flowering of the West Florida Continental Shelf is caused by the Loop Current, the annual intrusion of seawater into the Gulf of Mexico. Here, his Gymnodinium breve, a toxic dinoflagellate, produces more predictable buds. Red tides are carried to land by winds, tides, and other currents, and can be sustained with sufficient nutrients. In 1987 and 1988, red tide spread from the Gulf Coast of Florida north to North Carolina, causing her $25 million loss to the shellfish industry due to brevetoxin contamination. This is the first time G. breve flowering has been reported so far north, raising the question of whether annual flowering will occur in this region. Also, during the 1987-88 boom, 700 bottlenose dolphins washed up on the Atlantic coast of the United States. Red tides are common on the northwest coast of British Columbia, Canada, Alaska to the north, and the Russian coast of the Bering Sea.