Ecotoxicology and Environmental Safety,
Год журнала:
2023,
Номер
258, С. 114981 - 114981
Опубликована: Май 8, 2023
There
are
increasing
evidences
that
the
biodilution
effect
can
significantly
reduce
biomagnification
of
mercury
(Hg)
in
fish.
The
significant
antagonism
selenium
(Se)
-Hg
may
have
a
potential
diluting
on
Hg
fish;
however,
there
is
still
lack
knowledge
such
effect.
To
reveal
Se-Hg
interaction
and
its
role
controlling
Hg,
we
investigated
levels
Se
muscle
liver
redlip
mullet
from
Jiaozhou
Bay,
China,
an
urbanized
semi-enclosed
bay
highly
impacted
by
human
activities.
In
general,
fish
were
negatively
correlated
to
size
for
with
<
200
mm,
indicating
antagonistic
increased
growth.
This
relationship
was
not
>
possibly
because
normal
metabolism
hindered
homeostatic
regulation
or
physiological
activities
as
gonadal
development
vivo.
Furthermore,
molar
ratio
liver/Hg
Se/Hg
liver,
suggesting
be
key
organ
involved
antagonism.
Moreover,
both
ratios
continued
decrease
size,
implying
weakens
These
results
indicate
sequestration
mechanism
function
driver
especially
at
mm.
findings
further
supported
established
linear
model
different
developmental
stages.
Coasts,
Год журнала:
2024,
Номер
4(1), С. 89 - 107
Опубликована: Фев. 4, 2024
In
the
1970s,
discovery
of
much
higher
mercury
(Hg)
concentrations
in
Mediterranean
fish
than
related
species
same
size
from
Atlantic
Ocean
raised
serious
concerns
about
possible
health
effects
neurotoxic
monomethylmercury
(MMHg)
on
end
consumers.
After
50
years,
cycling
and
fluxes
different
chemical
forms
metal
between
air,
land,
marine
environments
are
still
not
well
defined.
However,
current
knowledge
indicates
that
anomalous
Hg
accumulation
organisms
is
mainly
due
to
re-mineralization
organic
material,
which
favors
activity
methylating
microorganisms
increases
MMHg
low-oxygen
waters.
The
compound
efficiently
bio-concentrated
by
very
small
phytoplankton
cells,
develop
oligotrophic
phosphorous-limited
waters
then
transferred
grazing
zooplankton.
enhanced
bioavailability
together
with
slow
growth
more
complex
longer
food
webs
could
be
responsible
for
its
tuna
other
long-lived
predatory
species.
Sea
a
“hotspot”
climate
change
has
rich
biodiversity,
increasing
temperature,
salinity,
acidification,
stratification
seawater
will
likely
reduce
primary
production
composition
plankton
communities.
These
changes
affect
at
lower
trophic
levels
biomagnification
along
web;
however,
difficult
predict.
increased
evasion
gaseous
elemental
(Hg°)
warming
surface
productivity
decrease
availability
biotic
(and
possibly
abiotic)
methylation
processes,
but
oxygen
deep
waters,
webs,
reduced
top
predators
increase
their
content.
Despite
uncertainties,
regions
historically
affected
inputs
anthropogenic
geogenic
sources,
such
as
those
northwestern
northern
Adriatic
Sea,
rising
levels,
river
flooding,
storms
favor
mobilization
matter
maintain
high
bioaccumulation
rates
long
time.
Long-term
studies
will,
therefore,
necessary
evaluate
impact
continental
basin,
air–sea
exchanges,
communities,
formation
webs.
this
context,
safeguard
heavy
consumers
local
seafood,
it
appears
information
campaigns,
promote
initiatives
consumption
organize
large-scale
surveys
hair
or
urine
most
exposed
population
groups.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(40)
Опубликована: Сен. 23, 2024
Global
pollution
has
exacerbated
accumulation
of
toxicants
like
methylmercury
(MeHg)
in
seafood.
Human
exposure
to
MeHg
been
associated
with
long-term
neurodevelopmental
delays
and
impaired
cardiovascular
health,
while
many
micronutrients
seafood
are
beneficial
health.
The
largest
source
for
general
populations
originates
from
marine
fish
that
harvested
the
global
ocean
sold
commercial
market.
Here,
we
use
high-resolution
catch
data
fisheries
an
empirically
constrained
spatial
model
examine
origins
magnitudes
extracted
ocean.
Results
suggest
tropical
subtropical
account
>70%
because
they
major
fishing
grounds
large
pelagic
fishes
natural
biogeochemistry
this
region
facilitates
seawater
production.
Compounding
issue,
(selenium
omega-3
fatty
acids)
lowest
warm,
low-latitude
regions
may
be
further
depleted
by
future
warming.
Our
results
imply
extensive
harvests
species
industrial
fisheries,
particularly
tropics,
drive
public
health
concerns
related
exposure.
We
estimate
84
99%
subsistence
entities
globally
likely
exceed
thresholds
based
on
typical
rates
consumption.
highlight
need
both
stringent
controls
better
accounting
human
nutrition
choices.
Land Degradation and Development,
Год журнала:
2023,
Номер
35(4), С. 1261 - 1283
Опубликована: Ноя. 30, 2023
Abstract
Mercury
(Hg)
pollution
of
soil
and
water
environments
is
a
major
global
threat
to
human
health,
agri‐food
systems
ecosystems
industrial
activities
mainly
coal
combustion
augmented
their
content
in
different
environmental
media.
Bioremediation
nature‐based
solution
involving
microbial‐
plant‐based
(phytoremediation)
technologies
that
clean‐up
Hg
contaminated
sites.
Here,
we
review
Hg‐resistant
bacteria
how
latest
insights
our
understanding
the
cellular
biochemical
mechanisms
mer
operon
genes
responsible
for
resistance
transformation
have
facilitated
developments
microbial
Hg‐bioremediation.
We
also
phytoremediation
mechanisms,
including
those
bacterial‐
fungi‐assisted
processes,
which
shown
promising
results
reducing
2+
0
.
This
provides
detailed
knowledge
novel
bioremediation
methods.
Consequently,
phyto‐based
critical
role
reclamation
Hg‐contaminated
protection
health
ecosystems.
