Issue no. 162 - Eutrophication, Cyanobacteria, and Cyanotoxins Newsletter
From the Mainstream Media / Dans les médias grand public
Yemen: Coral reefs at risk from algal bloom
after Rubymar sunk in Red Sea
“When the Rubymar sank in the Red Sea after a Houthi attack, the ship went down carrying 21,000-tonnes of fertiliser which could trigger massive algal blooms that could create "dead zones" for marine life and starve coral reefs of light.”
Video:
Can algae save the world? | DW Documentary
“Using algae to solve humanity’s most pressing problems - that’s the ambitious aim of a team of researchers from Germany.”
Ohio, USA: Ohio Department of Higher
Education (ODHE) Harmful Algal Bloom Research Initiative
“The Harmful Algal Bloom Research Initiative (HABRI), created in the aftermath of the 2014 Toledo water crisis, provides near-term solutions for the full suite of issues surrounding harmful algal blooms.”
Reducing
eutrophication crucial to prevent coastal methane emissions
“Many Swedish coastal areas are currently affected by eutrophication, making them a source of greenhouse gases, mainly in the form of methane. Reducing eutrophication is crucial for limiting methane emissions and thus mitigating climate change.”
Pollution
poses big risks to global clean water supplies, study shows
“Scientists say that nitrogen pollution from agriculture and human waste could dramatically worsen clean water scarcity by 2050.”
Ireland: Lough Neagh fish 'safe to eat'
after blue-green algae bloom says Food Standards Agency
"The findings are based on only 12 samples sent for testing for total microcystin. There is not sufficient sampling and would need to be repeated ongoing, which they have no funding to do.”
Europe: New report on climate risks should
be “final wake-up call” for the climate crisis in Europe
“On top of this, other human-caused factors such as fishing, pollution, and eutrophication act as risk-multipliers. Eutrophication refers to an excess of nutrients which collapses aquatic ecosystems. Collectively, these significantly threaten marine ecosystems.”
Zanzibar, Tanzania: 8 Children, 1 Adult
Dead After Eating Sea Turtle Meat; Several Hospitalised
“Chelonitoxism is another type of poisoning believed to be related to cyanobacteria.”
From the Scientific Media / Des médias scientifiques :
“The recent basin evolution with a significant positive trend in nitrate concentrations in offshore seawater in almost all seasons during the decade 2006–2015 occurred despite a decreasing trend in N concentration in the Po River water. The rise in N/P ratios in river water and the excess of N in the marine environment, which cannot be utilized by phytoplankton due to P limitation, can explain this phenomenon.”
How
does the neurotoxin β-N-methylamino-L-alanine exist in biological matrices and
cause toxicity?
“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.”
“Storing the water and recycling it onto crops prevents it from causing water quality problems such as algae blooms in Lake Erie or hypoxia in the Gulf of Mexico.”
“The most widely used methods for high-throughput detection of environmental cyanobacteria, such as 16S rRNA sequencing, typically provide above-species-level resolution, thereby disregarding intraspecific variation. To address this, we developed a novel DNA microarray tool, termed the CyanoStrainChip, that enables strain-level comprehensive profiling of environmental cyanobacteria.”
Revealing
cyanosphere microbial diversity of terrestrial cyanobacteria
“Given the observed variations in the cyanosphere microbial communities across different hosts, future considerations for ecological assessments and cyanobacterial restoration efforts must extend beyond the cyanobacteria to encompass their associated microbial communities.”
Eutrophication
of Inland Surface Waters in South Africa: An Overview
“Data indicate that up to 76% of major water impoundments and approximately 70% of major river systems are eutrophic to hypereutrophic and experience protracted periods of cyanobacterial blooms, particularly in the summer months.”
“We found that the dominant loss processes depend on several system specific factors including cyanobacterial genera-specific traits, in situ physicochemical conditions, and the microbial, phytoplankton, and consumer community composition.”
“Additional measures are required to maintain current status in the water bodies, and it is necessary to reduce at least 25% of diffuse nitrate pollution, and 50% of point loads of ammonium, phosphorus, and BOD5.”
The
vital statistics of standing waters in the United Kingdom
The UK Lakes Portal (https://eip.ceh.ac.uk/apps/lakes/)
contains information on nearly 42,000 UK waterbodies that are larger than ~0.01
ha (0.0001 km2).
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