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A very large algae bloom in Lake Erie, North America, which can be seen from space. An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems. It is often recognized by the discoloration in the water from the algae's pigments. [1] The term algae encompasses many types of ...
Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, mechanical damage to other organisms, or by other means.
Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen. The US Geological Survey defines anoxic groundwater as those with dissolved oxygen concentration of less than 0.5 milligrams per litre. [1] Anoxic waters can be contrasted with hypoxic waters, which are low (but not lacking) in dissolved oxygen.
Menhaden. Menhaden, also known as mossbunker and bunker and "the most important fish in the sea", [1] are forage fish of the genera Brevoortia and Ethmidium, two genera of marine fish in the order Clupeiformes. Menhaden is a blend of poghaden (pogy for short) and an Algonquian word akin to Narragansett munnawhatteaûg, derived from ...
v. t. e. Eutrophication is a general term describing a process in which nutrients accumulate in a body of water, resulting in an increased growth of microorganisms that may deplete the water of oxygen. [1][2] Eutrophication may occur naturally or as a result of human actions. Manmade, or cultural, eutrophication occurs when sewage, industrial ...
Dinoflagellate. The dinoflagellates (from Ancient Greek δῖνος (dînos) 'whirling' and Latin flagellum 'whip, scourge') are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata[ 5 ] and are usually considered protists. Dinoflagellates are mostly marine plankton, but they are also common in freshwater ...
A variety of algae growing on the sea bed in shallow waters. A variety of microscopic unicellular and colonial freshwater algae. Algae ( UK: / ˈælɡiː / AL-ghee, US: / ˈældʒiː / AL-jee; sg.: alga / ˈælɡə / AL-gə) are any of a large and diverse group of photosynthetic, eukaryotic organisms. The name is an informal term for a ...
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