Red tide is a natural phenomenon caused by some protozoa. Here are some common protozoa that can cause red tides:
1. Diatoms: They are single-celled algae with rich and diverse species.
2. Flagellates: Single-celled eukaryotes that possess one or more flagella for movement.
3. Chlorella: A single-celled algae with a green pigment.
4. Gray algae: Also known as dinoflagellates, it is a type of single-celled seaweed that has important economic value.
These protozoa can reproduce in large numbers to form red tides, causing water to turn red, brown or green. Not only will this damage aquatic ecosystems, it will also have consequences for human health and the economy. Therefore, scientists have been working hard to study the causes and preventive measures of red tides.
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