Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 20, 2024
Anthropogenic
debris
has
been
documented
in
Antarctica
for
the
past
40
years.
Upon
breakdown,
large
pieces
become
microdebris,
which
reaches
seafloor
through
a
variety
of
physical
and
biological
processes.
The
Antarctic
benthos,
deeply
reliant
on
sinking
organic
particles,
is
thus
vulnerable
to
ingesting
microdebris.
By
using
benthic
specimens
sampled
between
1986
2016
deposited
collections,
we
provide
first
record
microdebris
Southern
Ocean
deep-sea
invertebrates.
Specimens
from
15
species
(n
=
169
organisms)
had
their
gut
content
examined,
with
13
yielding
shape
fibers
85
fibers).
highest
ingestion
percentages
were
recorded
sea
cucumbers
Heterocucumis
steineni
(100%),
Molpadia
violacea
(83%)
Scotoplanes
globosa
(75%),
brittle
star
Amphioplus
peregrinator
(53%).
Deposit-
suspension-feeding
strategies
yielded
most
fibers,
accounting
83.53%
particles.
Seven
identified
as
microplastics,
composed
polyamide,
polycarbonate,
polyester,
polyethylene
terephthalate,
polyisoprene
polysulfone.
We
also
earliest
microplastic
Antarctica,
polysulfone
fiber
ingested
by
Boreomysis
sp.
mysid
caught
1986.
occurrence
world's
remote
continental
margin
renews
concerns
pollution
seemingly
isolated
regions.
The Science of The Total Environment,
Год журнала:
2024,
Номер
927, С. 172124 - 172124
Опубликована: Март 31, 2024
Recent
studies
have
highlighted
the
prevalence
of
microplastic
(MP)
pollution
in
global
marine
environment
and
these
pollutants
been
found
to
contaminate
even
remote
regions,
including
Southern
Ocean
south
polar
front.
Previous
this
region
mostly
focused
on
MPs
larger
than
300
μm,
potentially
underestimating
extent
MP
pollution.
This
study
is
first
investigate
surface
waters
front,
with
a
focus
small
500-11
μm
size.
Seventeen
water
samples
were
collected
southern
Weddell
Sea
using
an
in-house-designed
sampling
system.
The
analysis
entire
sample
micro-Fourier
transform
infrared
spectroscopy
(μFTIR)
focal
plane
array
(FPA)
detection
revealed
presence
all
samples,
vast
majority
detected
being
smaller
(98.3
%).
mean
concentration
reached
43.5
(±
83.8)
m
Royal Society Open Science,
Год журнала:
2023,
Номер
10(3)
Опубликована: Март 1, 2023
Microplastics
(MP)
have
been
reported
in
Southern
Ocean
(SO),
where
they
are
likely
to
encounter
Antarctic
zooplankton
and
enter
pelagic
food
webs.
Here
we
assess
the
presence
of
MP
within
krill
(
Euphausia
superba
)
salps
Salpa
thompsoni
quantify
their
abundance
type
by
micro-Fourier
transform
infrared
microscopy.
were
found
both
species,
with
fibres
being
more
abundant
than
fragments
(krill:
56.25%
salps:
22.32%
total
MP).
Polymer
identification
indicated
originated
from
local
distant
sources.
Our
findings
prove
how
situ
ingestion
these
organisms
is
a
real
ongoing
process
SO.
amount
was
higher
(2.13
±
0.26
ind
−1
(1.38
0.42
),
while
size
extracted
(130
30
µm)
significantly
lower
(330
50
µm).
We
suggest
that
differences
between
ingested
two
species
may
be
related
strategies,
ability
fragment
as
well
different
human
pressures
collection
areas
study
region.
First
comparative
field-based
evidence
salps,
emblematic
SO
marine
ecosystems,
underlines
ecosystems
particularly
sensitive
plastic
pollution.
Analytical Methods,
Год журнала:
2024,
Номер
16(15), С. 2177 - 2197
Опубликована: Янв. 1, 2024
The
escalating
prominence
of
micro-
and
nanoplastics
(MNPs)
as
emerging
anthropogenic
pollutants
has
sparked
widespread
scientific
public
interest.
These
minuscule
particles
pervade
the
global
environment,
permeating
drinking
water
food
sources,
prompting
concerns
regarding
their
environmental
impacts
potential
risks
to
human
health.
In
recent
years,
field
MNP
research
witnessed
development
application
cutting-edge
infrared
(IR)
spectroscopic
instruments.
This
review
focuses
on
advanced
IR
techniques
relevant
instrumentation
analyse
MNPs.
A
comprehensive
literature
search
was
conducted,
encompassing
articles
published
within
past
three
years.
findings
revealed
that
Fourier
transform
(FTIR)
spectroscopy
stands
most
used
technique,
with
focal
plane
array
FTIR
(FPA-FTIR)
representing
cutting
edge
in
spectroscopy.
second
popular
technique
is
quantum
cascade
laser
(QCL-IR)
spectroscopy,
which
facilitated
rapid
analysis
plastic
particles.
Following
closely
optical
photothermal
(O-PTIR)
can
furnish
submicron
spatial
resolution.
Subsequently,
there
atomic
force
microscopy-based
(AFM-IR)
made
it
feasible
MNPs
at
nanoscale
level.
instruments
identified
covered
this
were
compared.
Comparison
metrics
encompass
substrates/filters,
data
quality,
resolution,
acquisition
speed,
processing
cost.
limitations
these
identified,
recommendations
address
proposed.
offer
valuable
guidance
researchers
selecting
suitable
for
experiments,
thereby
facilitating
advancements
aimed
enhancing
our
understanding
health
associated
The Science of The Total Environment,
Год журнала:
2024,
Номер
918, С. 170618 - 170618
Опубликована: Фев. 6, 2024
The
stomach
content
of
60
krill
specimens
from
the
Southern
Ocean
were
analyzed
for
presence
microplastic
(MP),
by
testing
different
sample
volumes,
extraction
approaches,
and
applying
hyperspectral
imaging
Fourier-transform
infrared
spectroscopy
(μFTIR).
Strict
quality
control
was
applied
on
generated
results.
A
high
load
residual
materials
in
pooled
samples
hampered
analysis
avoided
a
reliable
determination
putative
MP
particles.
Individual
stomachs
displayed
results,
however,
only
after
re-treating
with
hydrogen
peroxide.
Before
this
treatment,
lipid
rich
residues
resulted
false
assignments
polymer
categories
hence,
particle
numbers.
Finally,
identified
4
out
60,
one
per
stomach.
Our
study
highlights
importance
strict
to
verify
results
before
coming
final
decision
contamination
environment
aid
establishment
suitable
internationally
standardized
protocols
sampling
organisms
including
their
habitats
worldwide.
The Science of The Total Environment,
Год журнала:
2024,
Номер
946, С. 174320 - 174320
Опубликована: Июнь 26, 2024
Antarctica
has
traditionally
been
viewed
as
a
relatively
isolated
ecosystem.
Although
still
considered
pristine,
it
is
increasingly
also
being
affected
by
microplastic
pollution.
Reported
high
sea
floor
concentrations
raise
concern
that
these
ecosystems
might
act
major
sink
for
This
significant
species
in
those
remote
are
likely
more
sensitive
to
rapid
environmental
change
due
level
of
specialization,
and
lower
tolerance
levels.
Microplastic
ingestion
fish
barely
assessed
latitude
environments.
Here
we
aimed
provide
baseline
data
the
eastern
Weddell
Sea,
which
particularly
remote,
suggested
an
area
conservation.
By
analyzing
gastrointestinal
tracts
40
specimens
from
five
species,
report
overall
incidence
rate
0.23.
than
recent
studies
have
found
other
Southern
Ocean,
below
global
means.
The
highest
was
detected
L.
squamifrons
(0.67),
followed
P.
evansii
(0.29).
most
common
polymer
polyethylene
recovered
8
particles
(42.1
%)
one
specimen,
while
remaining
11
microplastics
polyester
(36.8
%).
study
shows
even
region
Antarctic
Ocean
with
almost
no
vessel
traffic,
fisheries
or
touristic
activity,
bathydemersal
bathypelagic
exhibit
their
tract.
