Issue no. 171 - Eutrophication, Cyanobacteria, and Cyanotoxins Newsletter
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| Oscillatoria princeps |
From the Mainstream Media / Dans les médias grand public
Europe: Fostering European Lakes
Restoration by Nutrient Removal, Recovery, and Reuse (FERRO)
“We will develop a next-generation lake restoration approach by combining targeted restoration techniques with nutrient recovery and recycling to achieve multi-benefits: improved ecological status of lakes, support a circular economy, climate adaptation, support food production, promote biodiversity, and boost ecosystem services provision.”
Florida, USA: EPA Petitioned to Protect
Floridians, Wildlife From Toxic Algae Blooms
“Five conservation organizations petitioned the Environmental Protection Agency today to set limits on the dangerous algae bloom toxins that now routinely threaten the health of Floridians and wildlife.”
Ireland: Better Farming for Water Campaign
Launched
“Eight actions for change have been identified that farmers can take on their own farms which will lead to improvements in water quality.”
Michigan, USA: U-M lands $6.5M center to
study links between Great Lakes algal blooms, human health
“Great Lakes researchers at the University of Michigan have been awarded a $6.5 million, five-year federal grant to host a center for the study of links between climate change, harmful algal blooms and human health.”
Scotland, United Kingdom: Nitrogen use
efficiency in Scotland: annual report 2024
“The Nitrogen Use Efficiency for all food production is 29%, with the figure for agriculture (28%) being very similar, given that agriculture dominates food production. The 28% figure for all of agriculture comprises two extremely different values for arable agriculture (65%) and livestock-based agriculture (10%).”
California, USA: NASA-Clear Lake Clouded by
Algae
“Bright green swirls were visible across most of the lake’s area when the OLI-2 (Operational Land Imager-2) on the Landsat 9 satellite acquired this image on May 15.”
Iceland: City of Reykjavík Advises Against
Feeding Ducks Bread
“Another consequence of bread-feeding, the announcement notes, is the increase in nutrient levels in Tjörnin, both from the bread and the large number of birds it attracts. Excessive nutrient levels can lead to eutrophication.”
Massachusetts, USA: Video: Cape Cod
Has a Big Problem Simmering Just Below Its Surface
“The "yellow tide" under the Cape is rising. So...what is it?”
New Hampshire, USA: Summer Is Off To a Bad
Start for Cyanobacteria in NH Waters
“It is not even technically summer yet, but it is starting out as a bad season for cyanobacteria with the state’s earliest warnings ever on record and four lakes already on lists this week.”
Scotland, United Kingdom: Sewage-based
biochar may reduce algal blooms in Scotland
“Following tests using a variety of filtration systems, the research team found that the biochar-based filter was able to remove large amounts of phosphorus, a nutrient that contributes to algal blooms when present in excess quantities, from waste water.”
Earth
from space: Ethereal algal vortex blooms at the heart of massive Baltic 'dead
zone'
“In 2018, satellite images captured a stunning spiral of cyanobacteria blooming in the Baltic Sea.”
From the Scientific Media / Des médias scientifiques :
Multivariate extremes
in lakes
“Here we use satellite observations to investigate how the occurrence of multiple types of extremes, notably algal blooms, lake heatwaves, and low lake levels, have varied in 2724 lakes since the 1980s.”
Coastal
phytoplankton blooms expand and intensify in the 21st century
“Globally, the spatial extent (+13.2%) and frequency (+59.2%) of blooms increased significantly (P < 0.05) over the study period.”
“Dense Microcystis wesenbergii exposure altered feeding rates of native fish. M. wesenbergii disturbed neuro-endocrine appetite signalling pathways.”
“The microbial community in Sandusky Bay changes from being dominated by toxic cyanobacteria to non-toxic cyanobacteria. Long-term monitoring of water bodies is necessary to detect changes in water quality and microbial community structures.”
“Concurrently, the predominance of Microcystis forming the algal microbial aggregates is considered a hotspot for preserving and transferring ARGs.”
Understanding
drivers of local water quality perception in the Lake Erie Basin
“Our results indicate that greater trust in agricultural organizations and local government was consistently associated with better perceived water quality.”
“Residual P contributes to the P accumulation caused by macrophyte decomposition. Fifty-five percent of macrophyte P has been leached before the ice-on season.”
“We look at how C:P can be utilized to manage and reduce eutrophication and harmful algal blooms (HABs) in freshwater environments in this review work.”
Stoichiometry
on the edge—humans induce strong imbalances of reactive C:N:P ratios in streams
“Here we show that the majority (94%) of the studied 574 German catchments show a depletion or co-depletion in rOC and rP, illustrating the ubiquity of excess N in anthropogenically influenced landscapes.”
“Our laboratory culture data suggest that organic N input could support Microcystis blooms and toxin production in nature, and Microcystis-associated microbial communities likely play critical roles in this process by influencing cyanobacterial succession through either decreasing (via competition) or increasing (via biotransformation) N availability, especially under inorganic N scarcity.”
Environmental
indicators of lake ecosystem health in Aotearoa New Zealand: current state and
trends
“Trophic state analyses indicated that most monitored lakes were eutrophic.”
“By conducting detailed
comparative analyses across diverse aquatic environments, it highlights the
complexities of mitigating HABs and underscores the importance of
environment-specific strategies.”
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