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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 fresh water or marine water systems. It is often recognized by the discoloration in the water from the algae's pigments. [1]
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.
The Trophic State Index (TSI) is a classification system designed to rate water bodies based on the amount of biological productivity they sustain. [1] Although the term "trophic index" is commonly applied to lakes, any surface water body may be indexed. The TSI of a water body is rated on a scale from zero to one hundred. [1]
According to GCHD, blue-green algae blooms can ... Sep. 18—MOSES LAKE — The Grant County Health District released a water quality warning Saturday. There is a new bloom present in both north ...
Due to higher temperatures, and higher pH levels in the summer, Aphanizomenon flos-aquae begin to flourish and eventually form dense mats known as ‘blooms’ in late summer. [7] The blooms dissipate in autumn as the water temperature and pH drop again and the conditions are more favorable to akinete development.
The blooms are cropping up regularly, likely from warming waters and intensifying storms. Blue-green algae blooms, once unheard of in Lake Superior, are a sign that ‘things are changing ...
The depleted oxygen levels in turn may lead to fish kills and a range of other effects reducing biodiversity. Nutrients may become concentrated in an anoxic zone, often in deeper waters cut off by stratification of the water column and may only be made available again during autumn turn-over in temperate areas or in conditions of turbulent flow.
Eutrophication processes fuel the growth of blue-green algae, also known by its more correct scientific name cyanobacteria. These bacteria normally appear green in color and can turn blue when the algae (bacteria) blooms are dying. As an algae bloom dies, the microscopic cells break down, releasing toxins in the surrounding water.