Algal bloom

Definition

An algal bloom is a rapid increase in the population of algae in an aquatic system, often due to excess nutrients. These blooms can have harmful effects on water quality, marine life, and human health.

5 Must Know Facts For Your Next Test

1. Algal blooms are primarily caused by nutrient pollution from agricultural runoff and wastewater.
2. Harmful algal blooms can produce toxins that affect both marine organisms and humans.
3. Algal blooms can lead to hypoxic or 'dead zones' where oxygen levels are too low to support most marine life.
4. Some algal blooms are bioluminescent, creating glowing water at night.
5. Monitoring and managing nutrient levels is key to preventing harmful algal blooms.

Review Questions

• What are the primary causes of algal blooms?
• How can algal blooms negatively impact marine ecosystems?
• What are some methods used to prevent or manage algal blooms?

Related terms

Eutrophication:

The process by which a body of water becomes excessively enriched with nutrients, often leading to algal bloom.

Hypoxia: A condition in which there is insufficient oxygen in the water, often resulting from algal bloom decomposition.

Nutrient Pollution: Contamination of water bodies with excessive amounts of nutrients like nitrogen and phosphorus, promoting algal growth.