Question

How algae in ponds are harmful for aquatic organisms?
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Answer 1

Answer:

When the algae eventually dies, the oxygen in the water is consumed. The lack of oxygen makes it impossible for aquatic life to survive. ... Harmful algal blooms can occur in lakes, reservoirs, rivers, ponds, bays and coastal waters, and the toxins they produce can be harmful to human health and aquatic life

Answer 2

Answer:

Some algae produce toxic chemicals that pose a threat to fish, other aquatic organisms, wild and domestic animals, and humans. The toxins are released into the water when the algae die and decay. The most common and visible nuisance algae in fresh water, and the species that are often toxic, are the cyanobacteria.

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