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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.
Barley straw, in England, is placed in mesh bags and floated in fish ponds or water gardens to help reduce algal growth without harming pond plants and animals. Barley straw has not been approved by the United States Environmental Protection Agency (EPA) for use as a pesticide and its effectiveness as an algaecide in ponds has produced mixed results during university testing in the United ...
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]
Bacteria commonly called blue-green algae are often present in bodies of water throughout the world, but if fed too much of the phosphorus and nitrogen in farm fertilizers, they can turn into harmful algae blooms that can affect drinking water, create oxygen-starved dead zones that kill marine life, spoil swimming, boating and tourism and ...
In the UK, the invasive species Crassula helmsii and Myriophyllum aquaticum have both escaped from garden ponds. These plants cause considerable practical problems in protecting freshwater. [2] Amphibious species such as frogs, toads, and newts are common in garden ponds, especially in overgrown areas with algae and reeds.
Like true algae, cyanobacteria are photosynthetic and contain photosynthetic pigments, which is why they are usually green or blue. Cyanobacteria are found almost everywhere; in oceans, lakes and rivers as well as on land. They flourish in Arctic and Antarctic lakes, [23] hotsprings [24] and wastewater treatment plants. [25]
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