Issue no. 174 - Eutrophication, Cyanobacteria, and Cyanotoxin News
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| Dolichospermum circinale (USGS) |
From the Mainstream Media / Dans les médias grand public
North Carolina, USA: U.S. Fish and Wildlife
Service agrees to pause algaecide project
“Plans were in place to treat cyanobacteria, known as blue-green algae, using a product that the Environmental Protection Agency determined is toxic to birds in the 40,000-acre lake.”
Key
to managing nutrients is treating manure right in the pit
“Technology created in Europe and backed by research confirms how inserting into the pit a nitrogen stabilizer called dicyandiamide (DCD) provides significant environmental and economic benefits.”
Australia: New research provides guidance
on integrating gene testing in cyanobacterial management
“Despite the proven benefits of these molecular methods, they are not yet widely adopted in routine testing due to a lack of standardised guidelines for interpreting gene detection results within current risk assessment frameworks.”
Québec, Canada: Carte interactive des lacs
et rivières du Québec
Découvrez la qualité des plans d’eau au Québec.
The
Promise of Precision Agriculture Is Slowly Coming to Fruition
“…these kinds of sensors could help farmers reduce the overuse of fertilizer, which runs off of farms, polluting rivers, lakes, groundwater and even the Gulf of Mexico.”
Advanced
Algae Sensor Tested in Toledo Proves Valuable Tool in Protecting Drinking Water
“The installation put the facility on the map as the first in the nation to test out the fluorescence-based technology that detects a pigment that scientists believed could flag the release of toxins from blue-green algal cells.”
Florida, USA: Environmentalists Push EPA
for Florida Algae Toxin Standards
“Arguing that Florida has not adequately addressed the issue and ignored water-quality laws, the coalition of environmental organizations united on the issue filed a petition on May 23rd urging the EPA to set water-quality standards and numeric criteria for toxins that help lead to algae blooms.”
Québec, Canada: Des municipalités veulent
bannir le wakesurf, qui cause des ravages sur les lacs
« De plus en plus de municipalités veulent ramener un peu d’ordre sur leur lac en limitant la vitesse des bateaux ou en interdisant certaines activités comme le wakesurf qui causent des ravages »
Ireland: Farm and field specific plans
needed to improve water quality
“The recently published ‘Water Quality in 2023: An indicators Report’ by the EPA has shown no significant change in any of the water quality indicators for Ireland’s rivers, lakes, estuaries and groundwaters in 2023.”
“Environmental groups want to use engineered wetlands to help replenish the river of grass and address toxic algae.”
States
Are Eyeing Bird-Friendly Wetlands to Help Rid the Great Lakes of Toxic Algae
“Swamps and marshes alone can’t fix the problem, but they have an important role to play, experts say.”
“We
should have a sense of urgency”: Drainage tile drives nutrient pollution
“Agricultural drainage tile, a system used by farmers to increase crop yields, is a main contributor to excess nutrients in waterways.”
“One year away from a federal deadline to reduce nutrient runoff into the Gulf of Mexico by 20%, increases in tile drainage, livestock and fertilizer use have made success unlikely.”
From the Scientific Media / Des médias scientifiques :
“Through our systematic review, we found inadequate spatial representation of BMP studies to capture the underlying variability in climate, soil, and other conditions that could impact BMP performance.”
“Researchers have since hypothesized that Microcystis aggregates represent a community of synergistic and interacting species, an interactome, each with unique metabolic capabilities that are critical to the growth, maintenance, and demise of Microcystis blooms.”
“The results showed that the presence of MPs in freshwater environments had a higher impact on Cyanobacteria and Firmicutes as the dominant phyla, and the presence of microplastics promoted their enrichment and growth.”
A new
concern raised from algal bloom: Organic chloramines in chlorination
“Algal blooms have become a significant challenge in water treatment all over the world. In chlorination of drinking water, algal organic matter (AOM) leads to the formation of organic chloramines.”
“Phosphorus (P) is a finite resource and necessary nutrient for agriculture. Urine contains a higher concentration of P than domestic wastewater, which can be recovered by source separation and treatment (hereafter urine diversion).”
“Applying the model, we map hotspots of phosphorus loss across the United States and characterize the primary factors driving these losses.”
Automated
identification of toxigenic cyanobacterial genera for water quality control
purposes
“These results demonstrate
that the proposed approach can be employed as an automated screening tool for
identifying toxigenic Cyanobacteria with practical implications for water
quality control replacing the traditional estimation given by the lab operator
following microscopic observations.”
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