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In freshwater ecosystems, algal blooms are most commonly caused by high levels of nutrients (eutrophication). The blooms can look like foam, scum or mats or like paint floating on the surface of the water, but they are not always visible. Nor are the blooms always green; they can be blue, and some cyanobacteria species are coloured brownish-red.
Harmful algae blooms produce toxins that can poison humans, pets and wildlife, according to the Washington State Lake Protection Association. They commonly begin to occur near the start of summer ...
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, water deoxygenation, mechanical damage to other organisms, or by other means.
Algal blooms are a naturally-occurring phenomenon, however their frequency has been increasing in recent decades at least in-part due to human activities, climate changes, and the eutrophication (over-abundance of plant nutrients as a result of agricultural runoff, deforestation, river bed erosion, etc.) of marine waters.
The Department of Water Resources has issued a caution advisory warning residents to avoid Silverwood Lake, due to harmful cyanobacteria, or blue-green algae. People and pets urged to avoid San ...
Toxic algae blooms can be extremely dangerous to both humans and pets by producing nerve and liver toxins. Nerve toxins, or nerve poisoning can cause people to experience dizziness, tingling in ...
Pfiesteria piscicida is a dinoflagellate species of the genus Pfiesteria that some researchers claim was responsible for many harmful algal blooms in the 1980s and 1990s on the coast of North Carolina and Maryland. North Carolinian media in the 1990s referred to the organism as the cell from hell. It is known to populate estuaries. [1]
Heterosigma akashiwo is a species of microscopic algae of the class Raphidophyceae. [1] [2] It is a swimming marine alga that episodically forms toxic surface aggregations known as harmful algal bloom. The species name akashiwo is from the Japanese for "red tide". [1]