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.
Frontiers in Microbiology,
Год журнала:
2023,
Номер
14
Опубликована: Фев. 3, 2023
Coal
mining
subsidence
lakes
are
classic
hydrologic
characteristics
created
by
underground
coal
and
represent
severe
anthropogenic
disturbances
environmental
challenges.
However,
the
assembly
mechanisms
diversity
of
microbial
communities
shaped
such
environments
poorly
understood
yet.
In
this
study,
we
explored
aquatic
bacterial
community
ecological
processes
in
during
winter
summer
using
16S
rRNA
gene
sequencing.
We
observed
that
clear
structure
was
driven
seasonality
more
than
habitat,
α-diversity
functional
were
significantly
higher
(p
<
0.001).
Canonical
correspondence
analysis
indicated
temperature
chlorophyll-a
most
crucial
contributing
factors
influencing
season
variations
lakes.
Specifically,
explained
18.26
14.69%
variation,
respectively.
The
variation
deterministic
but
dominated
stochastic
summer.
Compared
to
winter,
network
exhibited
a
average
degree,
modularity,
keystone
taxa
(hubs
connectors
network),
thereby
forming
highly
complex
stable
structure.
These
results
illustrate
heterogeneity
provide
new
insights
into
revealing
effects
seasonal
succession
on
lake
ecosystems.
