Journal of Great Lakes Research,
Journal Year:
2018,
Volume and Issue:
45(3), P. 573 - 586
Published: Dec. 14, 2018
Since
the
early
2000s
Lake
Erie
has
seen
a
dramatic
increase
in
phytoplankton
biomass,
manifested
particular
by
rise
severity
of
cyanobacteria
blooms
and
prevalence
potentially
toxic
taxa
such
as
Microcystis.
Satellite
remote
sensing
provided
unique
capacity
for
synoptic
detection
these
blooms,
enabling
spatial
temporal
trends
their
extent
to
be
documented.
Algorithms
satellite
algal
often
rely
on
single
consistent
relationship
between
or
cyanobacterial
biomass
spectral
indices
Maximum
Chlorophyll
Index
(MCI)
Cyanobacteria
(CI).
Blooms,
however,
are
known
vary
significantly
community
composition
over
space
time.
A
suite
optical
property
measurements
during
western
bloom
2017
showed
highly
diverse
with
variable
absorption
backscatter
properties.
Elevated
backscattering
coefficients
were
observed
Maumee
Bay,
likely
due
cell
morphology
buoyancy
regulating
gas
vacuoles,
compared
typically
Planktothrix
dominated
Sandusky
Bay.
MCI
CI
calibrated
historical
chlorophyll
observations
applied
Sentinel
3's
OLCI
sensor
accurately
captured
Bay
but
underestimated
nearly
80%.
The
phycoerythrin-rich
picocyanobacteria
Aphanothece
Synechococcus
found
abundance
throughout
central
basins,
resulting
substantial
underestimations
using
blue
green
ratio-based
algorithms.
Potential
misrepresentation
from
properties
should
considered
assessments
conditions
Erie.
Nature Water,
Journal Year:
2023,
Volume and Issue:
1(10), P. 844 - 854
Published: Oct. 12, 2023
Abstract
High
concentrations
of
cyanobacterial
toxins
such
as
microcystin
represent
a
global
challenge
to
water
quality
in
lakes,
threatening
health,
economies
and
ecosystem
stability.
Lakes
are
sentinels
climate
change
but
how
warming
will
affect
is
still
unclear.
Here
we
examine
impacts
the
probability
exceeding
thresholds
across
2,804
lakes
United
States
show
future
alter
these
probabilities.
We
find
that
higher
temperatures
consistently
increase
likelihood
occurrence
above
highest
for
between
20
25
°C.
Regions
with
promote
shift
latitudes
coming
decades,
leading
relative
changes
exceedance
probabilities
more
than
50%
many
basins
States.
nitrogen
amplify
impact
rising
temperatures,
calling
increased
awareness
substantial
hazard
ecosystems
human
health
under
warming.
Journal of Hazardous Materials,
Journal Year:
2023,
Volume and Issue:
451, P. 131160 - 131160
Published: March 5, 2023
Global
eutrophication
and
climate
warming
exacerbate
production
of
cyanotoxins
such
as
microcystins
(MCs),
presenting
risks
to
human
animal
health.
Africa
is
a
continent
suffering
from
severe
environmental
crises,
including
MC
intoxication,
but
with
very
limited
understanding
the
occurrence
extent
MCs.
By
analysing
90
publications
1989
2019,
we
found
that
in
various
water
bodies
where
MCs
have
been
detected
so
far,
concentrations
were
1.4-2803
times
higher
than
WHO
provisional
guideline
for
lifetime
exposure
via
drinking
(1
µg/L)
12
15
African
countries
data
available.
relatively
high
Republic
South
(averaged
2803
μg/L)
Southern
whole
(702
when
compared
other
regions.
Values
reservoirs
(958
lakes
(159
types,
much
temperate
(1381
arid
(161
tropical
(4
zones.
Highly
significant
positive
relationships
between
planktonic
chlorophyll
a.
Further
assessment
revealed
ecological
risk
14
56
bodies,
half
used
sources.
Recognizing
extremely
Africa,
recommend
routine
monitoring
be
prioritized
ensure
safe
use
sustainability
this
region.
The Science of The Total Environment,
Journal Year:
2023,
Volume and Issue:
884, P. 163811 - 163811
Published: April 29, 2023
Understanding
the
environmental
conditions
and
taxa
that
promote
occurrence
of
cyanobacterial
toxins
is
imperative
for
effective
management
lake
ecosystems.
Herein,
we
modeled
total
microcystin
presence
concentrations
with
a
broad
suite
predictors
cyanobacteria
community
data
collected
across
440
Canadian
lakes
using
standardized
methods.
We
also
conducted
focused
analysis
targeting
14
congeners
190
lakes,
to
examine
how
abiotic
biotic
factors
influence
their
relative
proportions.
Microcystins
were
detected
in
30
%
highest
occurring
most
eutrophic
located
ecozones
central
Canada.
The
two
commonly
MC-LR
(61
lakes)
MC-LA
(37
lakes),
while
11
others
more
sporadically
waterbodies.
Congener
diversity
peaked
Canada
where
biomass
was
highest.
Using
zero-altered
hurdle
model,
probability
detecting
best
explained
by
increasing
Microcystis
biomass,
Daphnia
cyclopoid
soluble
reactive
phosphorus,
pH
wind.
Microcystin
increased
other
less
dominant
taxa,
as
well
copepod
dissolved
inorganic
carbon
water
temperature.
Collectively,
these
models
accounted
34
70
variability,
respectively.
Based
on
multiple
factor
congeners,
data,
zooplankton
found
abundance
varied
according
trophic
state
related
combination
genera
biomasses
variables.
Water,
Journal Year:
2023,
Volume and Issue:
15(13), P. 2436 - 2436
Published: July 1, 2023
Nutrient-driven
cyanobacteria
blooms
are
an
increasingly
common
issue
in
freshwater
environments,
particularly
anthropogenically
altered
landscapes.
As
stormwater
runoff
is
one
of
the
largest
sources
nutrients
for
bodies,
retention
ponds
urban
and
suburban
areas
likely
environments
harmful
were
thus
targeted
in-depth
investigation
assessing
taxonomic
composition,
bloom
morphological
toxicity,
impact
other
environmental
drivers.
Eighty-seven
algal
sampled
from
2019
to
2022
greater
Wilmington,
North
Carolina,
area.
Physicochemical
parameters
recorded,
classified
by
type
(defined
as
surface
mat,
scum,
water
column
distribution,
or
benthic
mat)
dominant
taxa.
Blooms
potentially
toxic
genera
most
prevalent.
Dissolved
inorganic
phosphorus
was
significantly
related
chlorophyll-α,
Microcystis
formation,
production
microcystin.
Seventeen
identified
ponds,
some
whose
demonstrated
detectable
Monoclonal
cultures
isolated
found
produce
anabaenopeptin
saxitoxin.
The
results
demonstrate
a
higher
incidence
over
bloom-forming
taxa
(chlorophytes,
euglenoids,
chrysophytes,
dinoflagellates,
diatoms)
39
bodies
sampled.
frequency
occurring
diversity
suggest
such
widespread
similar
across
multiple
urbanizing
areas.
this
study
all
within
residential,
commercial,
recreational
easily
accessible
people,
presenting
serious
hazards
both
public
health.
The Science of The Total Environment,
Journal Year:
2022,
Volume and Issue:
827, P. 154354 - 154354
Published: March 5, 2022
During
mechanical-biological
treatment,
wastewater
droplets
reach
the
air
with
bioaerosols
and
pose
a
health
threat
to
treatment
plant
(WWTP)
employees
nearby
residents.
Microbiological
pollutants
antimicrobial
resistance
determinants
are
discharged
water
bodies
treated
(TWW),
which
poses
potential
global
epidemiological
risk.
In
present
study,
taxonomic
composition
of
microorganisms
was
analyzed,
resistome
profile
mobility
genes
were
determined
by
metagenomic
next-generation
sequencing
in
samples
untreated
(UWW),
collected
from
an
activated
sludge
(AS)
bioreactor,
TWW,
river
upstream
downstream
discharge
point,
upper
respiratory
tract
swabs
WWTP
employees.
Wastewater
emitted
near
WWTP's
facilities
presumably
contributed
transmission
microorganisms,
particular
bacteria
phylum
Actinobacteria
associated
antibiotic
(ARGs)
(including
ermB,
ant(2″)-I,
tetM,
penA
cfxA2)
The
increased
diversity
concentrations
various
ARGs
bacA,
emrE,
sul1,
sul2
tetQ)
water.
This
study
fills
knowledge
gap
on
risks
faced
has
shown
that
microbiological
also
huge
quantities
rivers
posing
threat.
