Issue no. 166 - Eutrophication, Cyanobacteria, and Cyanotoxins Newsletter
From the Mainstream Media / Dans les médias grand public
Canada: L’avenir de la gestion de l’eau
douce au Canada
« La vision de cette nouvelle agence fédérale, dont le siège sera
situé à Winnipeg, au Manitoba, est de veiller à ce que les ressources en eau
douce restent sûres, propres et bien gérées pour aujourd’hui et les générations
futures. »
Canada: The future of freshwater management
in Canada
“The vision for the new federal agency—to be headquartered in Winnipeg, Manitoba—is to ensure freshwater resources are kept safe, clean, and well-managed for today and for future generations.”
The Netherlands: Layers Of Responsibility
For Dutch Nitrogen Pollution
“Nitrogen is used in chemical fertilizers to produce the soy that, in turn, is fed to livestock. The combined feces and urine of animals that are crowded into barns leads to more nitrogen, which evaporates as atmospheric ammonia. There’s simply not enough space for all the manure.”
Wisconsin, USA: Wisconsin abandoned rules
on nitrates pollution. Now, solutions seem far off
“Tiboris said the gains the state has seen in managing nitrogen and nitrates have mostly come from point sources, such as wastewater treatment plants. But non-point sources, such as runoff from agricultural fields, have not decreased nearly as much as is needed.”
United Kingdom: What is ammonia and how is
it harmful?
“But, given the proportion of ammonia emissions that comes from agriculture, UK farmers are being encouraged to adopt new measures to help the government reduce emissions by 16% by 2030 compared with 2005.”
Coastal
‘dead zones’ – how eutrophication is harming our oceans
“The nutrients fuel algal blooms which, when the algae die, can sink, decay and, ultimately remove oxygen from seawater.”
Caribbean: After 13 years, no end in sight for
Caribbean sargassum invasion
“Since the 1980s, the world population has nearly doubled, explained Lapointe, a professor at Florida Atlantic University. This, in turn, has led to a massive increase in the sargassum-boosting nutrients washing out of major rivers like the Mississippi in the US, the Amazon and Orinoco in South America, and the Congo in Africa.”
From the Scientific Media / Des médias scientifiques :
Bloomin’
Ridiculous: Climate Change, Water Contamination and Algal Blooms in a Land Down
Under
“The results demonstrate the need to incorporate robust public health risk assessments, communication, and management into water management and advocate international legislation changes based on evidence-based research to reduce blooms and prevent agricultural runoff.”
Analytical
Methods for Anatoxin-a Determination: A Review
“Therefore, the aim of this review is to compile the analytical methods developed to date for the detection and quantification of ATX-a levels alone and in mixtures with other cyanotoxins and their suitability.”
“This new predictive methodology provides regulators and stakeholders an opportunity to establish low cost, continuous monitoring environmental programs using UV–Vis approaches.”
The
reduction of nitrogen loss using biochar for soil fertility reservation
“The application of neutral biochar played a positive role in lower volatile ammonia loss and higher nitrate content compared to urease inhibitor application only. These findings reveal the potential of neutral biochar for the improvement of agricultural soil.”
“As water nutrient concentrations increased, nutritional quality of periphyton significantly decreased and, in turn, the correlation between fatty acid profiles of periphyton and macroinvertebrates declined.”
Evaluation
of metrics and thresholds for use in national-scale river harmful algal bloom
assessments
“Although, cyanotoxin concentrations are the most commonly used metrics by states to define an inland water HAB, there is a paucity of publicly available data. The wider availability of chlorophyll and oxygen data combined with the results from this study suggest that biomass and productivity state and event-based metrics may be a promising way to assess and predict the vulnerability of rivers to some of the deleterious effects of HABs at broad spatial scales.”
“We propose that the increasing soluble phosphorus concentrations across the basin, along with warming temperatures, might be contributing to the increasing frequency and intensity of algal blooms, emphasizing the need for management strategies to prevent further water-quality degradation.”
“Overall, this study provides evidence that P cycling remains active in winter, and an understanding of its contribution to the overall ecosystem process is needed to predict how lake ecosystems will behave under climate change.”
Compendium
of Metabolomic and Genomic Datasets for Cyanobacteria: Mined the Gap
“Analyses of the datasets described within this manuscript reveal the asynchrony of current genomic and metabolomic data, highlight the chemical diversity of cyanobacterial natural products.”
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