Harmful Algal Bloom

More than a dozen sea lions have been reported sick over the past week in Southern California in a suspected domoic acid event, and beachgoers in Malibu are warned to avoid the distressed animals.

Western Lake Erie is an ideal environment for the bacteria that make up algae

Rising temperatures are impacting waterways in cooler climates that typically aren't associated with cyanobacterial blooms.

Toxins released by cyanobacteria can be fatal for pets and make people sick. Blooms spike in the summer across the Midwest, and are becoming more frequent each year, globally, as

NASA's newest climate satellite rocketed into orbit Thursday to survey the world's oceans and atmosphere in never-before-seen detail. SpaceX launched the...

An analysis of lake water quality across the United States suggests a northward shift in areas at higher risk for toxic algae blooms due to climate change.

Phosphorus is an important nutrient, but too much of it in lakes and streams can diminish water quality and lead to eutrophication, resulting in harmful algal blooms and dead zones. To restore waterways degraded by excess phosphorus, decision-makers must understand which sources of the nutrient could be reduced to make the biggest impact on water quality.

Hundreds of aggravated sea lions have emerged on Southern California beaches after consuming toxic algae, researchers say.

They're small, but they're mighty. From producing oxygen we breathe to soaking up carbon we emit to feeding fish we eat, tiny phytoplankton are a crucial part of ocean ecosystems and essential to life as we know it on Earth. To give us a new view of these extraordinary aquatic organisms, NASA is launching a satellite in early 2024.

Researchers from Florida Atlantic University's College of Engineering and Computer Science and the Harbor Branch Oceanographic Institute have developed a system that can help monitor red tide in the coastal Gulf of Mexico.

Red tides, caused by Karenia brevis blooms, are a recurring problem in the coastal Gulf of Mexico. The organism, Karenia brevis, produces toxins that can cause fish kills, respiratory irritation in humans and cause death in sea turtles, dolphins, manatees and birds.

New research from University of Wisconsin–Madison scientists traces two tiny invasive species through their outsized effects on the water quality, algae blooms and toxic conditions in a Wisconsin lake.

Huge blooms of phytoplankton — microscopic algae floating on the ocean's surface — have become larger and more frequent along the world's coastlines, according to new research, bringing benefits to fisheries but also potentially causing harm.

Harmful algae blooms in lakes are a major environmental problem, producing extremely dangerous toxins that can taint water supplies or harm other organic life—including people. Biologists can test water safety by collecting samples off the side of a boat, but getting relevant data is no small task, especially in lakes that cover hundreds of miles.

NOAA scientists have warned people to stay away from the water at certain Florida beaches for the next couple of days.

Facilities release a "witches' brew" of toxins in their wastewater

A bloom of the toxic algae known as red tide continued to plague parts of Southwest Florida's coastline over the past week with fish kills and respiratory irritation.

Beaches in Southwest Florida are dealing with red tide fish kills and warnings as the harmful algal bloom makes its way from the Gulf of Mexico. Here's what people should know.

Rondaxe Lake in Herkimer County, New York, represents classic Adirondack Park waters. But over the last quarter-century, Rondaxe—like thousands of lakes in temperate zones around the world—has been losing a global-warming battle to maintain oxygen in its waters.

A phytoplankton almost as old as Earth—about 3 billion years compared to the planet's 4.5 billion years—still holds secrets, including how it can survive starvation in the most nutrient-deficient oceans. Synechococcus is the most geographically diverse of three phytoplankton species, contributing to a quarter of the oceans' primary production and appearing in both frigid polar waters and warm tropical seas.