Carbon Research,
Journal Year:
2024,
Volume and Issue:
3(1)
Published: April 19, 2024
Abstract
Soil,
as
a
primary
repository
of
plastic
debris,
faces
an
escalating
influx
microplastics.
Microplastics
have
the
potential
to
decrease
soil
bulk
density
and
pH,
well
alter
pore
structure
aggregation.
These
changes
in
physicochemical
properties
subsequently
lead
habitat
degradation
for
microbes
environmental
shifts
that
impact
plant
growth.
Masquerading
carbon
storage,
microplastics
can
distort
assessments
pool
by
introducing
plastic-carbon
associated
leachates,
influencing
organic
matter
(SOM)
turnover
through
priming
effects
(e.g.,
dilution,
substrate
switching,
co-metabolisms).
Additionally,
influence
distribution
particulate
mineral-associated
matter,
consequently
affecting
accumulation
stability
carbon.
Furthermore,
also
chemodiversity
dissolved
(DOM)
soils
increasing
DOM
aromaticity
molecular
weight
while
deepening
its
humification
degree.
The
observed
may
be
attributed
inputs
from
microplastic-derived
along
with
organo-organic
organo-mineral
interactions
coupled
microbial
processes.
Acting
inert
source
carbon,
create
distinct
ecological
niche
growth
contribute
necromass
formation
pathways.
Conventional
reduce
contribution
stable
whereas
bio-microplastics
tend
increase
it.
exert
wide
range
on
performance
both
internal
external
factors,
seed
germination,
vegetative
reproductive
growth,
inducing
ecotoxicity
genotoxicity.
impacts
arise
alterations
environment
or
uptake
plants.
Future
research
should
aim
elucidate
storage
within
fractions,
paying
closer
attention
rhizosphere
dynamics
such
stabilization
mineral
protection
rhizodeposits
soils.
Graphical
Environment International,
Journal Year:
2024,
Volume and Issue:
190, P. 108781 - 108781
Published: May 28, 2024
As
an
exogenous
carbon
input,
microplastics
(MPs),
especially
biodegradable
MPs,
may
significantly
disrupt
soil
microbial
communities
and
element
cycling
(CNPS
cycling),
but
few
studies
have
focused
on
this.
Here,
we
assessing
the
effects
of
conventional
low-density
polyethylene
(LDPE),
polybutylene
adipate
terephthalate
(PBAT),
polylactic
acid
(PLA)
MPs
rhizosphere
CNPS
in
a
soil-soybean
system.
The
results
showed
that
PBAT-MPs
PLA-MPs
were
more
detrimental
to
soybean
growth
than
LDPE-MPs,
resulting
reduction
shoot
nitrogen
(14.05%
11.84%)
biomass
(33.80%
28.09%)
at
podding
stage.
In
addition,
dissolved
organic
(DOC)
increased
by
20.91%
66.59%,
while
nitrate
(NO
Ecotoxicology and Environmental Safety,
Journal Year:
2024,
Volume and Issue:
287, P. 117235 - 117235
Published: Nov. 1, 2024
The
biodegradable
(polybutylene
adipate
terephthalate:
PBAT)
and
conventional
(polyethylene:
PE)
microplastics
(MPs)
at
0.5
%,
1
2
%
dosages
(w/w)
were
added
into
soils
with
without
Serratia
marcescens
ZY01
(ZY01,
a
tet-host
strain)
to
understand
their
different
effects
on
the
dissipation
of
oxytetracycline
(OTC)
tet.
results
showed
that
PBAT
MP
exhibited
inhibition
degrees
OTC
biodegradation
in
regardless
ZY01,
while
PE
did
not
change
enhancement
degree
ZY01.
These
differences
due
higher
adsorption
capacity
stronger
toxicity
microorganisms.
Besides
soil
organic
matter,
pH
total
phosphorus
important
factors
regulating
specific
bacteria
MPs
(e.g.,
nitrogen-cycling
Steroidobacter
Nitrospira)
+
phosphorus-cycling
Saccharimonadales
Haliangium),
respectively.
Regardless
selective
harboring
treatments
than
was
observed
dosage
(w/w),
opposite
trend
true
(w/w).
Some
genera
belonging
Actinobacteriota
strongly
associated
class
integron-integrase
gene
(intI1),
playing
critical
role
horizontal
transfer
tet
especially
for
co-existence
This
study
will
be
helpful
understanding
how
as
hotspots
affect
environmental
behavior
antibiotics
ARGs
soil.
Proceedings of the National Academy of Sciences,
Journal Year:
2024,
Volume and Issue:
121(45)
Published: Oct. 28, 2024
Microplastic
is
globally
regarded
as
an
important
factor
impacting
biogeochemical
cycles,
yet
our
understanding
of
such
influences
limited
by
the
uncertainties
intricate
microbial
processes.
By
multiomics
analysis,
coupled
with
soil
chemodiversity
characterization
and
carbon
use
efficiency
(CUE),
we
investigated
how
responses
to
microplastics
impacted
cycling
in
a
long-term
field
experiment.
We
showed
that
biodegradable
promoted
organic
accrual
average
2.47%,
while
nondegradable
inhibited
it
17.4%,
consequence
virus–bacteria
coadaptations
disturbance.
In
relevant
functional
pathways,
significantly
(
P
<
0.05)
enhanced
abundance
transcriptional
activity
related
complex
carbohydrate
metabolism,
whereas
functions
involved
amino
acid
metabolism
glycolysis.
Accordingly,
viral
lysis
treatments
introduce
more
compounds
dissolved
matters,
thus
benefiting
oligotrophs
high
metabolic
capabilities
exploitation
competition.
contrast,
enriched
auxiliary
genes
through
“piggyback-the-winner”
strategy,
conferring
dominant
copiotrophs,
substrate
utilization
capabilities.
These
virus–host
interactions
were
also
demonstrated
corresponding
plastisphere,
which
would
alter
resource
allocation
via
CUE,
affecting
storage
consequently.
Overall,
results
underscore
importance
viral–host
microplastics-dependent
ecosystem.
Soil Biology and Biochemistry,
Journal Year:
2024,
Volume and Issue:
195, P. 109480 - 109480
Published: May 24, 2024
The
soil
microbiome,
which
is
shaped
by
gut-related
activities
of
earthworms,
affected
microplastic
contamination.
However,
the
influence
microplastics
on
earthworm
gut
and
cast
microbiomes
has
been
poorly
explored.
Here,
we
investigated
(1%
in
soil,
w/w)
physicochemical
properties
bacterial
communities
during
passage
aging
Lumbricus
terrestris.
Microplastics
used
agricultural
film
production
were
selected,
i.e.,
low
density
polyethylene,
polylactic
acid
polybutylene
adipate
terephthalate
(PBAT).
Different
niches,
including
pre-ingestion
content
aged
casts
(from
0
to
180
days),
studied.
Results
showed
that
possibly
enhanced
passage-derived
difference
between
fresh
terms
pH,
ammonium,
nitrate
nitrite,
dissolved
organic
carbon.
But
such
effects
mostly
faded
out
after
days
aging.
composition,
as
well
alpha
beta
diversity
both
total
(DNA)
active
(RNA)
decisively
their
niche
(R2:
0.22–0.63,
p
<
0.001,
PERMANOVA),
rather
than
presence/absence
or
types
MPs.
Nevertheless,
biomarkers
indicative
PBAT
treatment
identified,
functional
prediction
for
community
this
had
higher
potentials
hydrocarbon
degradation
(4.9–7.8
times
microplastic-free
casts).
We
also
identified
a
"Soil-related
core
community"
"Gut-related
(contributing
39.2%–50.2%
microbiome),
neutralized
impacts
maintained
structure
function
soil–gut–cast
transit.
Our
findings
indicate
tested
exerted
minor
process,
might
not
necessarily
have
significant
additional
microbiome
when
they
are
incorporated
into
soils.
Future
studies
testing
different
soils,
polymers,
species,
under
field
conditions
recommended
help
enhance
current
knowledge
microbiomes.
