Remote Sensing,
Journal Year:
2025,
Volume and Issue:
17(4), P. 608 - 608
Published: Feb. 11, 2025
Harmful
algae
blooms
(HABs)
pose
critical
threats
to
aquatic
ecosystems
and
human
economies,
driven
by
their
rapid
proliferation,
oxygen
depletion
capacity,
toxin
release,
biodiversity
impacts.
These
blooms,
increasingly
exacerbated
climate
change,
compromise
water
quality
in
both
marine
freshwater
ecosystems,
significantly
affecting
life
coastal
economies
based
on
fishing
tourism
while
also
posing
serious
risks
inland
bodies.
This
article
examines
the
role
of
hyperspectral
imaging
(HSI)
monitoring
HABs.
HSI,
with
its
superior
spectral
resolution,
enables
precise
classification
mapping
diverse
species,
emerging
as
a
pivotal
tool
environmental
surveillance.
An
array
HSI
techniques,
algorithms,
deployment
platforms
are
evaluated,
analyzing
efficacy
across
varied
geographical
contexts.
Notably,
sensor-based
studies
achieved
up
90%
accuracy,
regression-based
chlorophyll-a
(Chl-a)
estimations
frequently
reaching
coefficients
determination
(R2)
above
0.80.
quantitative
findings
underscore
potential
for
robust
HAB
diagnostics
early
warning
systems.
Furthermore,
we
explore
current
limitations
future
management,
highlighting
strategic
importance
addressing
growing
economic
challenges
posed
paper
seeks
provide
comprehensive
insight
into
HSI’s
capabilities,
fostering
integration
global
strategies
against
proliferation.
Analytical Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 17, 2025
A
sensitive
fluorescence
biosensor
was
developed
for
microcystin-LR
(MC-LR)
detection
using
H1,
H2,
and
H3
DNA
probes
as
sensing
elements.
The
aptamer
in
H1
can
recognize
the
target.
H2
labeled
with
FAM
BHQ.
MC-LR
binding
will
activate
self-assemblies
through
toehold-mediated
strand
displacement.
In
formed
products
(MC-LR/H1/nH2/nH3),
BHQ
be
separated
a
high
signal
observed
assay.
is
limit
of
53
fM.
We
further
constructed
several
logic
circuits
(AND-AND
cascaded
circuit,
feedforward
resource
allocation
circuit)
MC-LR,
MC-LA,
MC-YR
three
inputs.
numbers
0
1
are
used
to
code
input
output
signals.
AND-AND
cascade
circuit
produce
only
(111)
combination.
MC-LA
signals,
inhibit
self-assembly
execute
negative
operation.
Through
rational
design
probe
hybridizations
on
four
different
magnetic
beads
(MBs),
achieve
an
intelligent
information.
Our
proposed
not
provide
platform
microcystin
but
also
serve
smart
system
sensing.
Harmful Algae,
Journal Year:
2024,
Volume and Issue:
134, P. 102627 - 102627
Published: April 1, 2024
Due
to
climate
changes
and
eutrophication,
blooms
of
predominantly
toxic
freshwater
cyanobacteria
are
intensifying
likely
colonize
estuaries,
thus
impacting
benthic
organisms
shellfish
farming
representing
a
major
ecological,
health
economic
risk.
In
the
natural
environment,
Microcystis
form
large
mucilaginous
colonies
that
influence
development
both
cyanobacterial
embedded
bacterial
communities.
However,
little
is
known
about
fate
by
salinity
increase.
this
study,
we
monitored
dominated
bloom
its
microbiome
along
French
freshwater-marine
gradient
at
different
phases
bloom.
We
demonstrated
in
genotypic
composition,
production
specific
metabolites
(toxins
compatible
solutes)
heterotrophic
bacteria
structure
response
particular
M.
aeruginosa
wesenbergii
survived
salinities
up
20.
Based
on
microcystin
gene
abundance,
became
more
during
their
estuarine
transfer
but
with
no
selection
variants.
An
increase
solutes
occurred
continuum
extensive
trehalose
betaine
accumulations.
Salinity
structured
most
community,
an
increased
richness
diversity
continuum.
A
core
mucilage-associated
attached
fraction
was
highly
abundant
suggesting
strong
interaction
between
protecting
role
mucilage
against
osmotic
shock.
These
results
underline
need
better
determine
interactions
as
key
widespread
success
adaptation
various
environmental
conditions.
