Issue no. 157 - Eutrophication, Cyanobacteria, and Cyanotoxins Newsletter
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| Microcystis aeruginosa (Natural History Museum, London, England) |
New Zealand: Hot El Nino summer causing more
algal blooms in New Zealand’s rivers, lakes
“Summer heat is driving a spate of potentially-toxic algal blooms around the country, with swimmers urged to be on the lookout for warning signs.”
Ontario, Canada: Windsor researcher
believes Pelee Island microbes could counter toxic algal blooms
“The goal is to determine if a microbial community in the sand-filled trenches of Pelee Island can be used as a water treatment application.”
Michigan, USA: Poop pollution case reaches
Michigan Supreme Court
“State regulators want to crack down on pollution at large livestock farms to better protect the state’s water, but farmers think regulators are overstepping their authority.”
China: Ditches and Ponds Help Reduce
Agricultural Pollution in Upland Catchments in China
“This innovative method utilizes natural ecosystems consisting of vegetation, microorganisms, and sediment to slow down the flow velocity of water and promote the precipitation of particulate matter carried by running water.”
USA: EPA: Nutrient runoff is widespread
waterway stressor
“The NRSA found that the percentage of river and stream miles in poor biological condition could be reduced by 20% if excess nutrient levels could be reduced from poor to good or fair.”
Will long-term
operation of constructed wetlands become a source of pollution itself?
“However, whether long-term operation of constructed wetlands can still effectively remove pollutants remains a topic of ongoing debate because if not properly managed, large plants that grow in wetlands over time can clog their pores and reduce pollutant”
Agricultural
nitrogen pollution is global threat, but circular solutions await
“Circular economy solutions include better fertilizer efficiency, enhanced natural nitrogen fixation, and recovery and reuse of wasted nitrogen. Societal changes are also needed, including a shift in human diet away from meat.”
From the scientific media / Des médias scientifiques
CyanoCyc
Cyanobacterial Web Portal
“CyanoCyc is a web portal that integrates an exceptionally rich database collection of information about cyanobacterial genomes with an extensive suite of bioinformatics tools.”
Monitoring
Harmful Algal Blooms Using Drones
“Using a multispectral sensor on an unpiloted aerial system (UAS) proved over 90 percent effective in detecting cyanobacteria blooms—also known as harmful algal blooms (HABs)—in New Hampshire waterbodies, offering a safer and faster alternative to traditional water sampling methods”
“Continuous exposure to MET stimulated cyanobacterial growth.”
“Our observations have implications for routine water quality monitoring practices, which traditionally use ELISA kits to estimate MC levels and often limit collection of surface samples during summer months near reservoir impoundments, and further indicate that spatiotemporal surveillance efforts are necessary to understand cyanotoxins risks when harmful cyanobacteria blooms occur throughout the year.”
Neurotoxicity
induced by cyanobacteria-derived molecules
“A greater understanding of the presence of the neurotoxic cocktail in cyanobacterial blooms will help to protect human and animal health from the acute and chronic effects of exposures to these blooms."
Neurotoxicity
induced by the microbial metabolite β-methylamino-L-alanine: pathways and
mechanisms
“Solid evidence of risk demonstrating the adverse health effects of BMAA exposure, as well as a better understanding of the pathways and mechanisms leading to neurodegeneration, are indispensable steps to prevent and protect humans from BMAA neurotoxicity.”
Impacts of
cyanobacterial metabolites on fish: Socioeconomic and environmental
considerations
“This review examines the concerns associated with cyanobacterial natural products in fish farming, including off-flavours, known cyanotoxins, and other potentially toxic compounds, while exploring their socioeconomic and environmental risks.”
Determination
key of freshwater macroscopic algae and Cyanobacteria blooms
“This document presents a simplified key to determine blooms of freshwater macroscopic algae and cyanobacteria that can be used in situ. It covers blooms (or proliferations) both in rivers and in lakes.”
“These findings further support the development of progressive neurodegenerative disease in cetaceans and a potential causative link to cyanobacterial toxins.”
Cyanobacteria
Harmful Algae Blooms: Causes, Impacts, and Risk Management
“We discussed social economic impacts, risk assessment, and management problems for cHABs and, thereafter, assessed the extant management approaches including prevention, control, and mitigation of the proliferation of cyanobacterial blooms.”
“During blooms, cytotoxicity
due to a single type of toxin is obvious from this pattern. In the absence of
blooms, the cytotoxicity seen reflected either a mixture of toxins or it was
caused by an unidentified toxin. These observations suggest that other toxins
with the potential to be harmful to human health may be present in the IRL.”
“Nature-based solutions
(NBS) like constructed wetlands and biofilters can be used for cyanotoxin
remediation. Both technologies are reviewed and critically assessed for
different types of water resources.”
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