Environment International,
Journal Year:
2023,
Volume and Issue:
183, P. 108393 - 108393
Published: Dec. 17, 2023
Microplastics
(MPs)
pollution
is
becoming
an
emerging
global
stressor
for
soil
ecosystems.
However,
studies
on
the
impacts
of
biodegradable
MPs
C
sequestration
have
been
mainly
based
bulk
quantity,
without
considering
storage
form
C,
its
persistency
and
N
demand.
To
address
this
issue,
common
poly
(butylene
adipate-co-terephthalate)
(PBAT)
was
used
as
model,
effects
functional
organic
pools,
including
mineral-associated
(MAOM),
particulate
(POM)
dissolved
matter
(DOM),
were
investigated
from
novel
coupled
perspective
stocks.
After
adding
PBAT-MPs,
contents
POM-C,
DOM-C,
MAOM-C
increased
by
546.9%-697.8%,
54.2%-90.3%,
13.7%-18.9%,
respectively.
Accordingly,
total
116.0%-191.1%.
Structural
equation
modeling
showed
that
pools
regulated
PBAT
input
microbial
metabolism
associated
with
enzymes.
Specifically,
debris
could
be
disguised
to
promote
POM
formation,
which
main
pathway
accumulation.
Inversely,
DOM-C
formation
attributed
product
selective
consumption
in
DOM-N.
Random
forest
model
confirmed
N-activated
(e.g.,
Nitrospirae)
PBAT-degrading
bacteria
Gemmatinadetes)
important
taxa
accumulation,
key
enzymes
rhizopus
oryzae
lipas,
invertase,
ammonia
monooxygenase.
The
accumulation
related
oligotrophic
Chloroflexi
Ascomycota)
aggregate
decreasing
DOM-N
46.9%-84.3%,
but
did
not
significantly
change
other
pools.
Collectively,
findings
highlight
urgency
control
nutrient
imbalance
risk
labile
loss
recalcitrant
enrichment
avoid
depressed
turnover
rate
MPs-polluted
soil.
Microplastic
mixtures
are
ubiquitously
distributed
in
global
ecosystems
and
include
varying
types.
However,
it
remains
unknown
how
microplastic
diversity
affects
the
biotic
interactions
of
microbes.
Here,
we
developed
novel
experiments
600
microcosms
with
ranging
from
1
to
6
types
examined
ecological
networks
for
microbial
communities
lake
sediments
after
2
months
incubation
at
15
20
°C.
We
found
that
generally
enhanced
complexity
both
temperatures,
such
as
increasing
network
connectance
reducing
average
path
length.
This
phenomenon
was
further
confirmed
by
strengthened
species
toward
high
except
negative
Interestingly,
temperatures
exaggerated
effects
on
structures,
resulting
higher
connectivity
interactions.
Consistently,
using
extinction
simulations,
temperature
led
more
robust
networks,
their
were
additionally
positively
mediated
presence
biodegradable
microplastics.
Our
findings
provide
first
evidence
could
unexpectedly
promote
stability
future
warming
amplify
this
effect.
Carbon Research,
Journal Year:
2024,
Volume and Issue:
3(1)
Published: Jan. 26, 2024
Abstract
Microplastics
are
polymer-based
materials
with
carbon
as
their
main
framework.
During
degradation,
they
release
greenhouse
gases
such
dioxide
and
methane.
Additionally,
environmental
microplastics
can
enter
plant
tissues,
triggering
oxidative
stress
in
cells,
adversely
affecting
photosynthesis,
metabolism,
gene
expression,
other
growth
parameters.
This
reduction
efficiency
sequestering
utilizing
atmospheric
indirectly
impacts
global
cycling,
exacerbating
the
effect.
Furthermore,
significantly
alter
soil
structure
composition
of
microbial
communities,
emissions
dioxide,
methane,
nitrous
oxide,
thus
promoting
gas
emissions.
Increasing
research
suggests
a
mutual
reinforcement
between
microplastic
pollution
climate
warming,
where
exacerbates
rise
average
temperature
leads
to
resuspension
sediments,
intensifying
environment.
article
primarily
focuses
on
different
ecosystems
relationship
warming.
It
summarizes
effects
marine,
terrestrial,
ecosystems,
well
mechanisms
by
which
change
affect
ecosystem
services.
By
delving
into
intricate
connection
emissions,
this
paper
aims
raise
awareness
caused
calls
for
further
change,
ultimate
goal
protecting
human
health.
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