The
objective
of
this
work
is
to
determine
the
metal/metalloid
accumulation
and
evaluate
how
effects
SePM
affect
bullfrog
tadpoles,
Lithobates
catesbeianus
by
biomarker
biochemicals
in
different
organs,
liver,
muscle,
kidney
brain.
To
do
this,
tadpoles
were
exposed
(1g
L-1,
96h)
then
their
organs
collected
analyze
concentration,
oxidative
stress
neurotoxicity.
showed
18
out
28
metals/metalloids,
Fe56,57
Al
highest
concentrations,
Cr,
Mn,
Pb
Cu
increased
10
20
times
Ti,
V,
Sr,
Rb,
Cd,
Sn
Ni
1
3
exposure
water.
Bioaccumulation
metals/metalloids
varied
significantly
between
with
muscle
liver
showing
higher
concentrations
metals,
followed
results
obtained
from
lipoperoxidation,
metallothionein
analyses
did
not
show
significant
differences
relation
control
groups.
Additionally,
regarding
lipoperoxidation
malondialdehyde
carbonyl
proteins
brain
only.
Regarding
nitric
oxide
synthase,
there
was
a
increase
group
SePM.
catalase
enzyme,
it
decreased
glutathione
peroxidase,
muscle.
Concerning
S-transferase,
primarily
responsible
for
detoxification,
kidney.
indicate
stress,
due
oxidation
catalyzed
components
On
other
hand,
acetylcholinesterase
no
difference
Thus,
contribute
understanding
that
has
deleterious
effect
on
aquatic
environment,
negatively
affecting
ways
levels
analyzed
organs.
Aquatic Toxicology,
Journal Year:
2023,
Volume and Issue:
263, P. 106692 - 106692
Published: Sept. 9, 2023
Metallurgical
industries
are
a
continuous
source
of
air
pollution
due
to
the
amount
settleable
particulate
matter
(SePM)
they
release.
This
SePM
is
complex
mixture
formed
by
metallic
nanoparticles
and
metals,
which
reach
terrestrial
aquatic
ecosystems
can
be
significant
contamination.
The
aim
this
study
was
evaluate
adverse
effects
at
different
levels
biological
organization
in
order
estimate
its
ecological
impacts
on
ecosystems.
For
purpose,
crustacean
Daphnia
magna
exposed
concentrations
(0.01,
0.1,
1,
5,
10
g/L)
using
multi-level
response
approach.
endpoints
studied
were:
avoidance
throughout
24
h
non-forced
exposure
system,
reproduction
(total
number
neonates
per
female
after
21
days
exposure),
acetylcholinesterase
activity
(AChE)
48
h,
finally,
feeding
rates
during
short-term
(48
h)
long-term
(21
day
+
h).
There
negative
effect
all
responses
measured
high
concentrations.
concentration-dependent
represented
88
%
100
two
highest
AChE
significantly
inhibited
5
g/L.
total
increased
from
1
g/L
first
brood
occurred
earlier
as
compared
control.
post-exposure
were
lower
concentration.
Chemical
analyses
performed
characterize
metals
present
SePM,
but
did
not
report
any
direct
relationship
with
toxicity,
chemical
heterogeneity
particles.
emission
compounds
caused
anthropogenic
may
have
consequences,
so
it
important
consider
these
possible
biota
generated
originated
metallurgical
activities.
Environmental
sectorial
regulations
needed
prevent
contamination
disturbances.
Journal of Hazardous Materials,
Journal Year:
2024,
Volume and Issue:
477, P. 135316 - 135316
Published: July 25, 2024
We
use
the
sentinel
mangrove
crab,
Minuca
rapax,
as
a
model
to
investigate
effects
of
metallic
settleable
particulate
matter
(SePM)
on
wetland.
Multiple
levels
energetic
responses,
including
(i)
metabolic
rate
and
energy
budget,
(ii)
oxidative
stress,
(iii)
behavioral
response
by
righting
time,
were
assessed
well
metal
metalloid
content
in
crabs
exposed
0,
0.1
1
g.L
Environments,
Journal Year:
2024,
Volume and Issue:
11(1), P. 12 - 12
Published: Jan. 5, 2024
Atmospheric
particulate
matter
(PM)
contains
numerous
constituents,
including
organic
molecules,
inorganic
ions,
and
metals,
with
some
of
them
possessing
hazardous
properties.
Although
mainly
associated
air
pollution,
PM
can
rapidly
be
transferred
from
land
to
aquatic
ecosystems,
consequently
poses
a
risk
marine
biota.
The
aim
this
work
was
evaluate
how
urban
atmospheric
(a
standard
reference
mixture
PM,
known
contain
various
contaminants),
suspended
in
seawater,
may
cause
toxicity
organisms.
To
purpose,
mussels
(Mytilus
galloprovincialis)
were
exposed
two
concentrations
PM:
5.7
11.4
mg/L.
After
7,
14,
21
days,
the
animals
collected
gills
digestive
gland
analysed
for
stress
biomarkers
(CAT,
SOD,
GPX,
GST,
MDA,
Ubi).
In
general,
results
show
that
exposure
different
caused
an
increase
UBI,
GPx
activities
compared
their
respective
controls.
average
GST
(87.65
±
30.23
nmol/min/mg
total
protein)
mg/L
increased
after
days
exposure,
activity
(8.04
3.09
14
PM.
MDA
also
provided
information
on
cellular
damage,
most
pronounced
effects
being
found
mussels.
This
study
confirms
are
useful
as
“early
warning”
indicators
environmental
contamination
provides
important
We
use
the
sentinel
mangrove
crab,
Minuca
rapax,
as
a
model
to
investigate
effects
of
metallic
settleable
particulate
matter
(SePM)
on
wetland.
Multiple
levels
energetic
responses,
including
(i)
metabolic
rate
and
energy
budget,
(ii)
oxidative
stress,
(iii)
behavioral
response
by
righting
time,
were
assessed
well
metal
metalloid
content
in
crabs
exposed
0,
0.1
1
g.L-1
SePM,
under
emerged
submerged
conditions
over
five
days,
simulating
rigors
intertidal
habitat.
Al,
Fe,
Mn,
Cr,
Y
exhibited
concentration-dependent
increase.
Metal
concentrations
higher
due
continuous
ingestion
SePM
direct
exposure
through
gills.
Exposure
concentration
up
decreased
enzymatic
activities,
reduced
assimilation
efficiency
for
maintenance,
induces
slower
probably
nervous
system
deficits.
In
conclusion,
affects
redox
status
physiology
M.
rapax
depending
submersion
regime
concentration.
The
disruption
budget
lethargic
behavior
implies
potential
ecological
alterations
ecosystem
with
unknown
consequences
local
population.
