Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: Dec. 16, 2024
Marine
heatwaves
(MHWs)
are
of
increasing
concern
due
to
the
emerging
ecological
and
socioeconomic
impacts
on
coastal
ecosystems.
Leveraging
data
Santa
Barbara
Coastal
Long-Term
Ecological
Research
project,
we
analyzed
MHW
event
metrics
observed
in
kelp
forest
ecosystem
across
Channel,
CA,
USA.
Not
only
was
there
a
significant
positive
trend
number
MHWs
recorded,
their
duration
intensity
were
also
over
time.
detected
year-round,
suggesting
that
marine
organisms
have
exposure
risks
regardless
phenology.
Exposure
at
one
life
history
stage
could
legacy
effect
subsequent
stages,
implying
little
temporal
refuge.
In
contrast,
mooring
revealed
near-surface
bottom
events
not
necessarily
coupled
even
less
than
15
m.
Such
spatial
variation
might
provide
temporary
refuge
for
mobile
species.
These
observations
highlight
importance
depth-stratified,
long-term
monitoring
understand
spatio-temporal
stress
communities.
Marine Environmental Research,
Journal Year:
2024,
Volume and Issue:
196, P. 106418 - 106418
Published: Feb. 22, 2024
Marine
heatwaves
(MHW)
threaten
marine
organisms
and
tend
to
increase
in
frequency
intensity.
We
exposed
the
blue
mussel
Mytilus
edulis
a
MHW
lasting
23
days,
including
two
10-d
periods
of
thermal
intensity
+5
°C
(20
°C-25
°C)
interspersed
by
1
day
back
20
°C,
followed
4-d
recovery
period.
investigated
behaviour
responses
mussels
gene
expression
changes
relative
circadian
rhythm
(Per),
oxidative
stress
(SOD),
cellular
apoptosis
(CASP3),
energy
production
(ATPs),
general
response
(hsp70).
Results
showed
that
disturbed
valve
activity
mussels.
Particularly,
increased
number
micro-closures,
showing
stressful
state
organisms.
Mussels
also
decreased
Per,
CASP3,
ATPs,
Hsp70
expression.
Some
behavioural
molecular
effects
persisted
after
MHW,
suggesting
limited
capacity
individuals.
This
work
highlighted
vulnerability
M.
realistic
MHW.
Journal of Experimental Biology,
Journal Year:
2025,
Volume and Issue:
228(2)
Published: Jan. 15, 2025
One
notable
consequence
of
climate
change
is
an
increase
in
the
frequency,
scale
and
severity
heat
waves.
Heat
waves
terrestrial
habitats
(atmospheric
waves,
AHW)
marine
(marine
MHW)
have
received
considerable
attention
as
environmental
forces
that
impact
organisms,
populations
whole
ecosystems.
Only
one
ecosystem,
intertidal
zone,
experiences
both
MHWs
AHWs.
In
this
Review,
we
outline
range
responses
zone
organisms
exhibit
response
to
We
begin
by
examining
drivers
thermal
maxima
develop
a
simple
model
daily
maximum
temperatures
based
on
publicly
available
tide
solar
radiation
models,
compare
it
with
logged,
under-rock
temperature
data
at
site.
then
summarize
experimental
ecological
studies
how
ecosystems
respond
across
dimensions
biotic
response.
Additional
paid
impacts
extreme
cellular
physiology,
including
oxidative
stress
thermally
induced
mitochondrial
overdrive
dysfunction.
examine
energetic
consequences
these
mechanisms
they
shift
organismal
traits,
growth,
reproduction
immune
function.
conclude
considering
important
future
directions
for
improving
organisms.
Aquatic Toxicology,
Journal Year:
2025,
Volume and Issue:
279, P. 107255 - 107255
Published: Jan. 24, 2025
Ecotoxicological
risk
and
the
mode
of
action
human
drugs
on
non-target
marine
animals
remain
unclear,
keeping
a
gap
knowledge
risks
related
to
ecosystem
disruption
chemical
contamination
food
chains.
Understanding
these
impacts
is
critical
developing
proper
waste
management
practices
regulatory
frameworks
prevent
long-term
environmental
health
problems.
This
study
investigates
Gemfibrozil,
Metformin,
Ramipril,
Venlafaxine,
individually
combined
Mytilus
galloprovincialis
over
30
days
assesses
persistent
effects
post-recovery
using
RNA-seq
16S
rRNA
microbiota
profiling.
All
pharmaceuticals
caused
few
changes
in
while
gene
expression
analyses
highlighted
drug-specific
alterations.
Gemfibrozil
exposure
led
alterations
lipid
fatty
acid
metabolism,
suggesting
similar
that
observed
target
species.
Metformin
significantly
impacted
mussels'
energy
with
disruptions
specific
genes
pathways
potentially
glucose
uptake
insulin
signaling.
was
also
treatment
leading
most
significant
predicted
functional
profiles
microbiota,
it
may
influence
microbiota's
potential
interact
host
metabolism.
Ramipril
resulted
up-regulation
stress
response
cell
cycle
regulation
Venlafaxine
induced
serotonin
synapse
pathways,
indicating
similarities
mechanisms
Mixture
four
severely
mussel
physiology,
including
impairment
oxidative
phosphorylation
compensatory
activation
several
involved
Despite
recovery
after
depuration,
metabolism
suggests
from
pharmaceutical
exposure.
Notably,
mTOR1
signaling
all
treatments
underscores
its
key
role
coordinating
bivalve
responses.
The
Transcriptomic
Hazard
Index
(THI)
calculated
for
each
indicates
major/severe
hazards
decreased
slight/moderate
depuration.
Environmental Pollution,
Journal Year:
2025,
Volume and Issue:
unknown, P. 126328 - 126328
Published: April 1, 2025
There
has
been
a
notable
increase
in
occurrence
and
intensity
of
marine
heatwaves
(MHW)
over
the
past
decades,
with
consequent
remarkable
risk
to
vulnerable
species
as
bivalves.
This
study
examines
responses
farmed
Mytilus
galloprovincialis
2022
MHW
that
impacted
Northwestern
(NW)
Adriatic
Sea.
Expression
key
transcripts
involved
functions
digestive
glands
mantles
were
investigated
explore
putative
acclimatory
processes
contributing
mussel
fitness.
The
was
characterized
by
persistent
sea
temperature
anomalies,
elevated
salinity,
dramatically
low
chlorophyll-a
levels.
Despite
temporal
trends
pH
extreme
seawater
temperatures
reached
July
August,
carbonate
system
never
undersaturation
state,
being
favourable
for
bivalve
biomineralization.
Transcriptional
profiles
displayed
2-step
response.
In
glands,
metabolism
lysosomal
response
functional
categories
showed
an
initial
decrease
(late
May),
recovery
late
August.
Antioxidant
cytoprotective
related
gene
products
February
August
increased
expression,
strong
up-regulations
mantles,
shell
biomineralization
prompted
stage
MHW,
likely
withstand
abrupt
changes
parameters
maintain
growth.
At
high
intensities,
energy
diverted
towards
stress
activation
relative
mRNA
levels
transcripts.
Results
trade-off
between
core
physiological
may
contribute
mussels
cope
adverse
conditions
NW
Antioxidants,
Journal Year:
2024,
Volume and Issue:
13(10), P. 1217 - 1217
Published: Oct. 10, 2024
Heat
stress
resulting
from
global
climate
change
has
been
demonstrated
to
adversely
affect
growth,
development,
and
reproduction
of
marine
organisms.
The
Zhikong
scallop
(
Journal of Thermal Biology,
Journal Year:
2023,
Volume and Issue:
119, P. 103776 - 103776
Published: Dec. 19, 2023
Rising
occurrence
of
extreme
warming
events
are
profoundly
impacting
ecosystems,
altering
their
functioning
and
services
with
significant
socio-economic
consequences.
Particularly
susceptible
to
heatwaves
intertidal
shellfish
beds,
located
in
estuarine
areas
already
stressed
by
factors
such
as
rainfall
events,
red
tides,
eutrophication,
pollution.
In
Galicia,
Northwestern
Spain,
these
beds
support
vital
shellfisheries,
featuring
the
native
clam
Ruditapes
decussatus
non-indigenous
R.
philippinarum.
Over
recent
decades,
populations
have
experienced
notable
abundance
shifts
due
various
anthropogenic
impacts,
including
climate
change.
this
habitat,
patches
seagrass
Zostera
noltei
that
coexist
bare
sand
can
act
thermal
refuges
for
benthic
organisms
clams.
To
assess
impact
on
a
mesocosm
experiment
was
conducted.
Juveniles
both
species
two
habitat
types-bare
Z.
noltei-were
exposed
simulated
atmospheric
during
diurnal
low
tide
four
consecutive
days.
Subsequent
transcriptomic
analysis
revealed
high
temperatures
had
more
pronounced
transcriptome
philippinarum
compared
decussatus.
The
type
played
crucial
role
mitigating
heat
stress
philippinarum,
presence
notably
ameliorating
response.
These
findings
direct
applications
shellfishery
management,
emphasizing
importance
preserving
undisturbed
refuges,
contributing
mitigation
heatwave
effects
populations.
