Planetary
plastic
pollution
poses
a
major
threat
to
ecosystems
and
human
health
in
the
Anthropocene,
yet
its
impact
on
biogeochemical
cycling
remains
poorly
understood.
Waterlogged
rice
paddies
are
globally
important
sources
of
CH4.
Given
widespread
use
mulching
soils,
it
is
urgent
unravel
whether
low-density
polyethylene
(LDPE)
will
affect
methanogenic
community
flooded
paddy
soils.
Here,
we
employed
combination
process
measurements,
short-chain
long-chain
fatty
acid
(SCFAs
LCFAs)
profiling,
Fourier-transform
ion
cyclotron
resonance
mass
spectrometry,
quantitative
PCR,
metagenomics,
mRNA
profiling
investigate
LDPE
nanoplastics
(NPs)
dissolved
organic
carbon
(DOC)
CH4
production
both
black
red
soils
under
anoxic
incubation
over
160-day
period.
Despite
significant
differences
microbiome
composition
between
two
soil
types,
exhibited
similar
results
NPs
exposure.
induced
change
DOC
content
up
1.8-fold
10.1-fold,
respectively.
The
proportion
labile
matter
decreased,
while
recalcitrance
increased.
Genes
associated
with
degradation
complex
carbohydrates
aromatic
were
significantly
enriched.
elevated
was
correlated
increases
PCR-quantified
mcrA
gene
copy
numbers
metagenomic
methanogen-to-bacteria
abundance
ratio.
Notably,
latter
linked
an
enrichment
hydrogenotrophic
methanogenesis
pathway.
Among
391
metagenome-assembled
genomes
(MAGs),
several
Syntrophomonas
Methanocella
MAGs
increased
concomitantly,
suggesting
that
treatments
stimulated
syntrophic
oxidation
acids.
further
identified
Methanosarcinaceae
Methanocellaceae
be
key
players
NPs-induced
production.
specific
indicates
stimulate
LCFAs
SCFAs,
acting
as
methanogen
partner.
Our
findings
enhance
understanding
how
waterlogged
importance
this
ecosystem,
our
crucial
for
elucidating
mechanisms
govern
fluxes,
which
highly
relevant
global
climate
change.
Ecotoxicology and Environmental Safety,
Год журнала:
2024,
Номер
272, С. 116082 - 116082
Опубликована: Фев. 8, 2024
Microplastics
(MPs)
are
widely
identified
as
emerging
hazards
causing
considerable
eco-toxicity
in
terrestrial
ecosystems,
but
the
impacts
differ
different
ecosystem
functions
among
chemical
compositions,
morphology,
sizes,
concentrations,
and
experiment
duration.
Given
close
relationships
trade-offs
between
plant
soil
systems,
probing
"whole
ecosystem"
instead
of
individual
must
yield
novel
insights
into
MPs
affecting
ecosystems.
Here,
a
comprehensive
meta-analysis
was
employed
to
reveal
an
unambiguous
response
plant-soil-microbial
system
MPs.
Results
showed
that
view
plant,
soil,
microbial
functions,
general
patterns
were
obviously
opposite.
For
example,
polyethylene
(PE)
polyvinyl
chloride
(PVC)
highly
increased
while
posed
negative
effects
on
functions.
Polystyrene
(PS)
biodegradable
(Bio)
decreased
stimulating
Additionally,
low-density
(LDPE),
PE,
PS,
PVC,
Bio,
granular
significantly
These
results
clearly
revealed
alter
equilibrium
system.
More
importantly,
our
further
tended
increase
multifunctionality,
e.g.,
LDPE
PVC
positive
Bio
neutral
multifunctionality.
Linear
regression
analysis
under
low
size
(<100
µm),
multifunctionality
gradually
reduced
with
The
concave
shape
pattern
along
gradient
experimental
duration
which
lower
than
70
days.
there
threshold
(i.e.,
5%
w/w)
for
concentration
i.e.,
(<
w/w),
MPs,
high
>
w/w).
findings
emphasize
importance
studying
systems
help
us
identify
ways
reduce
maintain
environmental
safety
ecology
perspective.
Environmental Microbiology,
Год журнала:
2024,
Номер
26(2)
Опубликована: Янв. 10, 2024
Abstract
Microplastics
affect
soil
functions
depending
on
drought
conditions.
However,
how
their
combined
effect
influences
fungi
and
linkages
with
ecosystem
is
still
unknown.
To
address
this,
we
used
rhizosphere
from
a
previous
experiment
in
which
employed
microplastic
fibres
addition
factorial
design,
evaluated
effects
fungal
communities.
decreased
richness
under
well‐watered
conditions,
likely
linked
to
microplastics
leaching
toxic
substances
into
the
soil,
root
fineness.
Under
drought,
by
contrast,
increased
pathogen
total
richness,
related
positive
properties,
such
as
water
holding
capacity,
porosity
or
aggregation.
Soil
was
attribute
most
affected
drought.
altered
relationships
between
point
that
many
of
them
flipped
negative
disappeared.
The
mitigated
individual
(antagonism),
suggesting
changes
conditions
may
alter
action
mode
soil.
Microplastic
harmful
can
be
while
improvement
properties
alleviate
Microorganisms,
Год журнала:
2025,
Номер
13(2), С. 259 - 259
Опубликована: Янв. 24, 2025
The
increasing
use
of
biodegradable
plastic
mulch
like
polybutylene
adipate
terephthalate
(PBAT)
has
raised
concerns
about
its
long-term
environmental
impact.
In
this
study,
we
investigated
the
effects
multiyear
PBAT
application
on
bacterial
and
fungal
communities,
assembly
mechanisms,
key
ecological
functions.
microbial
community
diversity
composition
were
significantly
altered
after
mulching.
We
observed
that
treatment
enriched
specific
genera,
such
as
Pantoea,
potentially
involved
in
degradation,
genera
Cephaliophora
Stephanosporaceae,
which
may
play
a
role
organic
matter
decomposition.
A
null
model
analysis
revealed
was
largely
shaped
by
deterministic
processes,
with
stronger
selection
pressures
PBAT-treated
soils,
while
communities
more
influenced
stochastic
processes.
addition,
also
impacted
functionality
soil
communities.
exposure
enhanced
biofilm
formation
aerobic
bacteria,
promoting
degradation
processes
reducing
abundance
stress-tolerant
bacteria.
Additionally,
functions
related
to
carbon,
nitrogen,
sulfur
cycling.
Notably,
exhibited
functional
shifts,
an
increase
saprotrophic
fungi
being
beneficial
for
nutrient
cycling,
alongside
potential
rise
plant
pathogenic
fungi.
These
findings
underscore
impacts
plastics,
suggesting
adaptation
changes
functions,
implications
agricultural
sustainability
bioremediation
strategies.
ACS Nano,
Год журнала:
2023,
Номер
17(24), С. 24867 - 24882
Опубликована: Дек. 12, 2023
To
understand
microplastic–nanomaterial
interactions
in
agricultural
systems,
a
randomized
block
90-day
pot
experiment
was
set
up
to
cultivate
ryegrass
seedings
typical
red
sandy
soil
amended
with
compost
(1:9
ratio).
Polyvinyl
chloride
(PVC)
and
polyethylene
(PE)
microplastic
(MP)
contaminants
were
added
into
soils
at
0.1
10%,
whereas
nano-Fe3O4
(as
nanoenabled
agrochemicals)
0.1%
0.5%
comparison
chemical-free
controls.
The
combination
of
MPs
significantly
increased
the
pH
(+3%
+
17%)
but
decreased
total
nitrogen
content
(−9%
–
30%;
P
<
0.05).
treatment
group
both
PE
had
highest
C
(29
g
kg–1
vs
20
control)
C/N
ratio
(13
8
control).
Increased
rhizosphere
concentrations
promoted
growth
(+42%
dry
weight)
by
enhancing
chlorophyll
(+20%)
carotenoid
(+15%)
activities.
Plant
leaf
root
peroxidase
enzyme
activity
more
affected
PVC
than
(+6%).
Nano-Fe3O4
changed
bacterial
community
structure
from
belowground
(the
rhizoplane
endosphere)
aboveground
phylloplane).
Under
MP
contamination,
addition
diversity
(+0.35%)
abundance
(+30%)
phylloplane
further
intensified
connectivity
networks
(positive
association
17%).
structural
equation
model
showed
that
change
plant
microbiome
associated
microbiome.
Overall,
these
findings
imply
positive
influences
on
soil–microbe–plant
system
establish
method
alleviate
harmful
effects
accumulation
soils.
