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The March 2025 marine disaster may be linked to a high number of dolphin deaths in the region, scientists sayGet our breaking news email, free app or daily news podcastThe number of dead dolphins washing up on South Australian beaches spiked in 2025, according to long-term data t

Using satellite data, researchers connected harmful algal blooms with warm water and low water levels at one of Colorado’s largest reservoirs.

NOAA and its research partners are forecasting a moderate harmful algal bloom (HAB) in western Lake Erie this summer. This year's bloom is expected to measure 3.5 on the HAB severity index, with a potential range of 3 to 4.5. Experts from NOAA and their government and academic pa

Over recent decades, harmful algal blooms have become increasingly common. These blooms often consist of bacteria called "cyanobacteria" in freshwater ecosystems. They can produce debilitating toxins, suffocate marine life by depleting oxygen in the water, and make water unsafe f

A new study sheds light on how the ancestors of modern land plants survived one of the most challenging aspects of life outside water: exposure to harmful ultraviolet (UV) radiation. By examining a microscopic alga closely related to the earliest land plants, researchers have unc

Algal blooms in the Lincoln Memorial Reflecting Pool in Washington, D.C., have long been a visible public nuisance. When the pool turned green again on June 15, less than two weeks after President Donald Trump's US$14 million renovation, it sparked outrage, a rush to use chemical

When bright green water appeared in the newly renovated Lincoln Memorial Reflecting Pool, it drew national attention and sparked political finger-pointing. The culprit: cyanobacteria—sometimes called blue-green algae—a type of bacteria that can produce toxins harmful to people, p

The summers of 2021 and 2022 were tough seasons for Colorado's Blue Mesa Reservoir. A severe drought gripped much of the western U.S., prompting emergency water releases that brought the reservoir to its lowest level since 1984. Marinas and boat ramps closed, remnants of a ghost

The marine microalgae responsible for the most devastating effects of the South Australian harmful algal bloom (HAB) has now been shown to be the most toxic species of its kind ever studied.

Trump administration urged to relist a species in ‘very, very serious trouble’ under Endangered Species ActClimate change is driving a gray whale “catastrophic mortality event” in the Pacific Ocean as melting sea ice depletes food sources and the animals starve, environmental gro

Portable screen-printed carbon electrode (SPCE) biosensors offer a rapid, low-cost way to detect microcystin-lysine-arginine (MC-LR), an extremely potent toxin produced by cyanobacteria during harmful algal blooms in freshwater. Even at low concentrations, MC-LR can damage the li