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Algal blooms are the result of a nutrient, like nitrogen or phosphorus from various sources (for example fertilizer runoff or other forms of nutrient pollution), entering the aquatic system and causing excessive growth of algae. An algal bloom affects the whole ecosystem.
a sudden increase in the growth of algae (= very simple, small plants that grow in water) in an area of water, such as an ocean, lake, or river: For the past two summers , toxic blue-green algae blooms caused by pollution have exploded in the river .
Algal blooms provide large concentrations of algae that produce organic compounds needed by higher organisms, ranging from oysters, clams, and mussels to human beings. For this reason, productivity increases in areas where algal blooms occur.
Harmful algal blooms (HABs) occur when algae — simple photosynthetic organisms that live in the sea and freshwater — grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals, and birds.
A red tide is one type of harmful algal bloom. Blooms occur when colonies of algae--simple ocean plants that live in the sea--grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals and birds.
Algae are always in natural bodies of water like oceans, lakes, and rivers, and a few types produce toxins. A harmful algal bloom (HAB) occurs when toxin-producing algae grow excessively in a body of water. What are algae?
Scientists estimate that roughly half of Earth’s oxygen comes from algae and other photosynthetic life in the ocean. Harmful algal blooms (HABs) have unhealthy impacts on aquatic and coastal environments, as well as humans and coastal economies.
