Issue no. 161 - Eutrophication, Cyanobacteria, and Cyanotoxins Newsletter
From the Mainstream Media / Dans les médias grand public
UNEP
warns of ecosystem harm from excessive nitrogen in agriculture
"Nitrogen is an essential nutrient for boosting food production, but its excessive use is polluting both surface and groundwater sources.”
Iowa, USA: Iowa primed for potentially
‘epic’ increase in stream pollution
“A buildup of nitrate in farm fields that has likely resulted from Iowa’s longest-running drought in 70 years has set the stage for a potentially massive uptick in stream pollution.”
“Following a meeting of the Agriculture Water Quality Group on February 29, a suite of measures have been proposed to improve water quality at farm level.”
US-EPA-Update:
Control Measures for Cyanobacterial HABs in Surface Water
“The table provides a summary of common physical and chemical measures for cyanobacterial bloom control in surface waters and their respective effectiveness and limitations.”
Morocco: Capturing carbon from land-based
algal blooms
“What we don’t want to do is feed competitor organisms or dump nutrients that will then create eutrophication offshore.”
Rising
Demand for Nutrient Recovery Systems: A Sustainable Solution to Water Quality
Management
“These innovative systems are designed to recycle and capture excess nutrients, such as nitrogen and phosphorus, from water sources, countering the detrimental effects of fertilizer runoff on aquatic environments and the greater ecosystem.”
South Africa: Video - South Africa seeks
solutions to phosphate pollution
“South Africa joined other nations at the United Nations Environment Assembly in search of solutions to the growing problem of phosphate pollution in waterways.”
United Kingdom: Pollution leaves British
and Irish rivers in dire straits
“Agricultural runoff is a major culprit, with 62% of waterways not meeting good standards for chemical and biological pollution.”
New Zealand sees increase in toxic algae in
waters this summer
“Scientists are seeing more toxic algae in New Zealand's lakes and rivers compared to previous years, as the country's warm, stable summer has created ideal conditions for the growth of the algae.”
New Zealand: Video - Toxic algae in our
rivers – What New Zealanders need to know
“In this video, Dr Susie Wood talks about toxic algae in Aotearoa rivers, explains how to stay safe and what we need to look out for.”
“The core of Welsh Water's strategy lies in its innovative approach to tackling phosphorus pollution - a persistent problem that has plagued the River Wye, leading to algal blooms that deplete oxygen levels and threaten local wildlife.”
Denmark: Denmark's Drinking Water Dilemma:
Pollution and Overuse Threaten Vital Resource
“The vice chairperson of Danske Regioner, has sounded the alarm on the increasing necessity to treat groundwater to meet demand, alongside the concerning shutdown of several drinking water boreholes due to pollution.”
From the Scientific Media / Des médias scientifiques :
Harmful
algal blooms in Cayuga lake, NY: From microbiome analysis to eDNA monitoring
“The results showed good performance of the qPCR assay as a screening for high toxin versus low/no toxin blooms. Additionally, the handheld qPCR device holds potential for in-field rapid (<1 h) screenings for high toxin blooms.”
“We conclude that lake treatments with low concentrations of H2O2 can be a successful tool to suppress harmful cyanobacterial blooms but may negatively affect some of the zooplankton taxa in lakes.”
Impacts
of Harmful Algal Blooms (HABs) on Agriculture: A Short Communication
“Human exposure to microcystin may occur through the consumption of livestock, crops, and vegetables contaminated by microcystins through drinking or irrigation.”
“In conclusion, we have developed a method to detect anatoxins precisely and accurately in urine samples, addressing a public health area of concern, which can be applied to future exposure events.”
How
does the neurotoxin β-N-methylamino-L-alanine exist in biological matrices and
cause toxicity?
“The neurotoxin BMAA extensively exists in the environment and can be transferred through the food web to human beings. In this review, the occurrence, toxicological mechanisms, and characteristics of BMAA were comprehensively summarized, and proteins and peptides were speculated as its possible binding substances in biological matrices.”
Coagulation
as an effective method for cyanobacterial bloom control: A review
“Flocculation was a
promising tool for controlling cyanobacteria blooms. Basic principles of four
kinds of flocculation methods were elucidated. Flocculant was important in the
flocculation process.”
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