Blue-Green Algae
Blue-Green Algae
What are Blue-Green Algae?
Blue-green Algae are a type of bacteria that is also known as Cyanobacteria. The ability of cyanobacteria to fulfill oxygenic photosynthesis is thought to have convinced the early diluting atmosphere into an altering one, which dramatically changed the paper of life forms on Earth by stimulating biodiversity and leading to the near-extinction of oxygen-intolerant organisms. They can vary considerably in shape, colour and size. Blue-green algae can be considered as simple aquatic plants that occur naturally in habitats such as marine waters, rivers, lakes, damp soil, tree trunks, hot springs and snow.
In external appearance and demands for light, nutrients and carbon dioxide, they are like to algae. They commonly look green and sometimes may turn bluish when scums are dying. This buoyancy-regulating mechanism gives the blue-green algae a competitive advantage in obtaining light and nutrients. Blue-green algal blooms often persist for several weeks, sometimes months, depending mainly on the weather or flow conditions.
Species of blue-green algae may dominate and increase excessively in water when the:
1. Nutrient levels, particularly phosphorus and nitrogen are sufficient to support the population growth
2. Water is still and turbulence is low (lack of mixing)
3. Weather patterns are stable for a long time
4. Weather is warm (although blooms can occur in cooler weather too).
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