Ecotoxicology and Environmental Safety,
Год журнала:
2024,
Номер
284, С. 116903 - 116903
Опубликована: Авг. 27, 2024
Ice,
water,
and
sediment
represent
three
interconnected
habitats
in
lake
ecosystems,
bacteria
are
crucial
for
maintaining
ecosystem
equilibrium
elemental
cycling
across
these
habitats.
However,
the
differential
characteristics
driving
mechanisms
of
bacterial
community
structures
ice,
sediments
seasonally
frozen
lakes
remain
unclear.
In
this
study,
high-throughput
sequencing
technology
was
used
to
analyze
compare
structure,
function,
network
characteristics,
assembly
communities
Wuliangsuhai,
a
typical
cold
region
Inner
Mongolia.
The
results
showed
that
ice
water
phases
had
similar
diversity
composition,
with
Proteobacteria,
Bacteroidota,
Actinobacteria,
Campilobacterota,
Cyanobacteria
as
dominant
phyla.
displayed
significant
differences
from
Chloroflexi,
Firmicutes,
Desulfobacterota,
Acidobacteriota
being
Notably,
exhibited
higher
spatial
variability
their
distribution
than
those
sediment.
This
study
also
revealed
during
period,
species
media
were
dominated
by
cooperative
relationships.
Community
primarily
influenced
stochastic
processes,
dispersal
limitation
drift
identified
two
most
factors
within
process.
heterogeneous
selection
played
role
composition.
Furthermore,
functions
related
nitrogen,
phosphorus,
sulfur,
carbon,
hydrogen
vary
among
These
findings
elucidate
intrinsic
structure
changes
quality
different
(ice,
sediment)
cold-zone
freezing
offering
new
insights
environmental
protection
ecological
restoration
efforts
such
environments.
Environmental Technology & Innovation,
Год журнала:
2024,
Номер
35, С. 103727 - 103727
Опубликована: Июнь 27, 2024
The
ferric
oxide
(Fe3O4)-impregnated
magnetic
mulberry
branch
biochar
(MBC)
was
prepared,
and
a
long-term
incubation
trial
conducted
to
assess
its
efficiency
in
the
remediation
of
As-contaminated
soil.
changes
soil
physicochemical
properties
[pH,
dissolved
organic
carbon
(DOC),
matter
(SOM),
electrical
conductivity
(EC)],
nutrient
elements,
enzymes,
bacterial
community
structure,
biodiversity
at
four
different
doses
MBC
(1
%,
3
5
7
wt%)
across
three
aging
periods
(30,
90,
180
d)
were
revealed.
results
showed
that
residual
state
As
increased
by
161.4
%
after
day
with
MBC.
Spearman
correlation
random
forest
model
analyses
revealed
available
nitrogen
had
highest
contribution
arsenic
passivation
process
addition
significantly
altered
abundance
composition
Actinobacteria,
Proteobacteria,
Chloroflexi,
Bacteroidetes,
Acidobacteriota
identified
as
predominant
bacteria
phylum
level
all
treated
groups.
visualizations
co-occurrence
networks
over
passivate
indicated
more
cooperative
mutualism
complex
interactions
from
30–180.
After
added
soil,
toxicity
reduced
increasing
time
through
succession
networks.
Overall,
facilitated
conversion
influencing
factors
microbial
structure
thus
reducing
toxicity.
is
promising
material
for
remediating
arsenic-contaminated
paddy
soils.
