Articles on Fertilizer runoff

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Researchers believe a decline in seagrass is leaving manatees malnourished. Dave Fleetham/Design Pics Editorial/Universal Images Group via Getty Images

Untreated sewage and fertilizer runoff threaten the Florida manatee’s main food source, contributing to malnutrition

Manatees along Florida’s coast are eating less seagrass and more algae than they did a few decades ago. This dietary shift could pose a new threat to the survival of the beloved species.
A dense cyanobacterial bloom is seen in the Kyiv Water Reservoir during an extreme heatwave near Kyiv, Ukraine in November 2020. While common across the world, Lake Superior has historically been too cold to host cyanobacterial blooms — until now. (AP Photo/Efrem Lukatsky)

Climate change is causing algal blooms in Lake Superior for the first time in history

The spectacular landscapes and pristine waters of the north shore of Lake Superior, which once provided inspiration for the Group of Seven, are now vulnerable to algal blooms.
The cut flowers could pay for themselves and even turn a profit. Margi Rentis

Flowers grown floating on polluted waterways can help clean up nutrient runoff and turn a profit

Phosphorus and nitrogen contribute to water pollution and cause harmful algal blooms. New research shows how mats of floating flower beds can take advantage of these nutrients while cleaning the water.
Tampa Bay’s sea grass meadows need sunlight to thrive. Algae blooms block that light and can be toxic to marine life. Joe Whalen Caulerpa/Tampa Bay Estuary Program via Unsplash

Water being pumped into Tampa Bay could cause a massive algae bloom, putting fragile manatee and fish habitats at risk

Harmful algae blooms are an increasing problem in Florida. Once nutrients are in the water to fuel them, little can be done to stop the growth, and the results can be devastating for marine life.
A harmful algal bloom in the western basin of Lake Erie in August 2017. (NOAA/Aerial Associates Photography, Inc. by Zachary Haslick/flickr)

Great Lakes waters at risk from buried contaminants and new threats

The Great Lakes contain reservoirs of legacy contaminants, mostly in their sediments, that are vulnerable to resuspension.
Nice to see you: parrotfishes prey on seaweed, which consume seaweeds that can outcompete, smother or even poison corals. Corinne Fuchs

How fish and clean water can protect coral reefs from warming oceans

A combination of factors – pollution, disease and overfishing – is harming corals but scientists have found clues to effective treatment by studying corals’ microbiome.

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