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 …

Jan 9, 2024 · Harmful algal blooms are the rapid growth of algae or cyanobacteria in water that can harm people, animals, or the environment. Going in or near water with a harmful algal bloom can …

Sep 10, 2025 · A harmful algal bloom (HAB) occurs when toxin-producing algae grow excessively in a body of water. The excessive algal growth, or algal bloom, becomes visible to the naked eye and can …

Jul 4, 2025 · Algal blooms are rapid growths or gatherings of algae in aquatic systems like lakes, rivers, or oceans. Depending on the algae, such blooms can cause red, brown, or blue pigmentation in the …

Apr 27, 2016 · Harmful algal blooms, or HABs, occur when colonies of algae — simple plants that live in the sea and freshwater — grow out of control and produce toxic or harmful effects on people, fish, …

Jul 15, 2025 · This article discusses what harmful algal blooms (HABs) are and summarizes quick identification tips, water testing, and bloom control methods.

Jan 7, 2026 · Over the years, these shifting features have included algae blooms—which can affect water quality, ecosystems, and nearby human communities—along with several types of invasive …

Blue green algae, also known as cyanobacteria, are a group of organisms that can live in freshwater, saltwater or brackish water. Large concentrations, called blooms, can change the water color to blue, …

Feb 5, 2025 · Excess nitrogen and phosphorus can cause algae blooms. The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants. When the algae die, the oxygen in the …

Explore the types, formation, and effects of algal blooms on marine ecosystems in this comprehensive guide.