Question

What is algal bloom? How is it caused?

Answer 1

Answer:

Explanation:

Some algal blooms are the result of an excess of nutrients (particularly phosphorus and nitrogen) into waters and higher concentrations of these nutrients in water cause increased growth of algae and green plants. ... As more algae and plants grow, others die.

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Answer 2

Answer:

These are a result of blue-green algae, which are actually bacteria (cyanobacteria). ... Some algal blooms are the result of an excess of nutrients (particularly phosphorus and nitrogen) into waters and higher concentrations of these nutrients in water cause increased growth of algae and green plants.