Environmental Science and Ecotechnology,
Journal Year:
2024,
Volume and Issue:
22, P. 100470 - 100470
Published: Aug. 9, 2024
Sedimentary
organic
matter
(SOM)
affects
the
stability
of
aquatic
carbon
pool.
The
degradation
process
SOM
is
complex
for
its
multifaceted
composition.
concentration
and
properties
affect
steady
state,
yet
transformation
processes
in
lakes
remain
unclear.
Here
we
show
molecular
redox
perspectives
polluted
sediments
with
high
content
diverse
vegetation.
We
find
significant
differences
fractions
across
various
sites.
origin
matter,
determined
using
excitation-emission
matrix
spectra,
influences
consistency
composition
biochemical
lacustrine
sediment.
also
observe
that
sulfur-containing
substances
decrease
chain
length
reduce
stability.
Fourier-transform
ion
cyclotron
resonance
mass
spectrometry
shows
degree
saturation
cause
reduction.
In
contrast,
nitrogen-containing
compounds
increase
modified
aromaticity
index
humin
content,
enhancing
complexity
(p
<
0.05).
These
results
complement
characteristics
transformations
SOM.
a
broader
perspective,
this
study
contributes
to
laying
foundation
understanding
cycle
future
effects.
Microplastics
(MPs)
have
become
a
global
hotspot
due
to
their
widespread
distribution
in
recent
years.
MPs
frequently
interact
with
dissolved
organic
matter
(DOM)
and
microbes,
thereby
influencing
the
carbon
fate
of
soils.
However,
role
plant
presence
regulating
MPs-mediated
changes
DOM
microbial
structure
remains
unclear.
Here,
we
compared
mechanisms
soil
response
3
common
nonbiodegradable
absence
or
radish
(Raphanus
sativus
L.
var.
radculus
Pers)
plants.
Fourier
transform
ion
cyclotron
resonance
mass
spectrometry
(FT-ICR-MS)
analysis
revealed
that
reduced
chemodiversity
biodiversity
(DOM).
enhanced
degradation
lignin-like
compounds
stability.
Comparative
showed
caused
less
disturbance
composition
metabolism
planted
than
unplanted
soil.
In
soil,
stimulated
fermentation
while
upregulating
photoautotrophic
activity
enhancing
system
The
rhizosphere
effect
mitigated
MPs-induced
CO2
emissions.
Overall,
our
study
highlights
crucial
effects
maintaining
ecosystem
stability
under
microbe-DOM-pollutant
interactions,
which
provides
theoretical
basis
for
predicting
resistance,
resilience,
transitions
upon
exposure
anthropogenic
source.
ACS ES&T Water,
Journal Year:
2024,
Volume and Issue:
4(11), P. 5027 - 5038
Published: Oct. 30, 2024
The
quality
and
chemodiversity
of
aquatic
dissolved
organic
matter
(DOM),
crucial
to
global
carbon
cycling
ecological
functions,
are
affected
by
microbial
anthropogenic
activities.
In
this
study,
molecular
characteristics
DOM
collected
from
14
field
water
samples
were
compared
with
three
standard
the
International
Humic
Substances
Society
using
Fourier
transform
ion
cyclotron
resonance
mass
spectrometry
(FT-ICR
MS).
Results
indicated
that
microbially
terrestrially
derived
contributed
surface
groundwater
pool,
higher
lability
(higher
H/Ciw)
in
than
IHSS
standards,
which
was
related
overall
impact
diverse
biogeochemical
processes
factors.
perturbations
contribute
more
nonoxygen
heteroatomic
(N,
S,
Cl
atoms)
molecules
water,
pollutants
(surfactants
sucralose)
had
significant
signatures
waters
intensive
emissions.
A
strong
correlation
among
indicators,
nutrients,
synthetic
results
activities
within
basin
heteroatoms
increased
diversity.
This
study
has
highlighted
environmental
reflecting
factors,
shedding
new
insights
into
freshwater
health.
