Authorea (Authorea),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 29, 2024
Drought
can
profoundly
alter
freshwater
ecosystems.
Although
the
impacts
of
drought
on
fish
have
received
increasing
attention,
our
understanding
response
gut
microbes
to
event
remains
limited.
We
combined
approaches
focusing
community
assembly
processes
and
microbial
core
network
investigate
dynamic
interactions
between
external
environment
during
recovery
periods,
assessed
resistibility
at
different
periods.
found
that
would
decrease
diversity
affect
composition
function
communities
in
gut.
The
exchange
compensated
for
decline
drought.
In
addition,
effects
propagated
through
trophic
cascades.
compensation
mechanism
reflects
adaptability
environments.
Our
study
highlights
environment,
provides
a
new
perspective
extreme
Ecological Processes,
Journal Year:
2024,
Volume and Issue:
13(1)
Published: Jan. 22, 2024
Abstract
Background
Understanding
community
assembly
mechanisms
across
taxa
and
space
is
fundamental
for
microbial
ecology.
However,
the
variability
determinants
of
processes
over
remain
unclear.
Here,
we
investigated
taxonomic
dependency
spatial
heterogeneity
in
bacterial
coastal
waters
East
China
Sea
using
neutral
null
models
with
customized
visualization
strategies.
Results
Overall,
varied
broad
groups
(phyla
proteobacterial
classes)
at
regional
scale.
A
determinism–stochasticity
balanced
mechanism
governed
total
assembly,
while
existed
ecological
processes.
Among
features,
niche
breadth
negative-to-positive
cohesion
ratio
were
strongly
associated
determinism-to-stochasticity
groups.
Bacterial
commonly
exhibited
heterogeneity,
extent
which
Spatial
bacteria
was
directly
driven
by
many
environmental
factors
potential
interactions
between
taxa,
but
not
geographic
factors.
higher
more
related
to
and/or
(except
Bacteroidetes),
those
lower
features.
Conclusions
Our
results
confirm
pervasiveness
providing
a
finer
understanding
about
regulation
complex
waters.
Microorganisms,
Journal Year:
2024,
Volume and Issue:
12(12), P. 2458 - 2458
Published: Nov. 29, 2024
Soil
microbial
communities
are
particularly
sensitive
to
selenium
contamination,
which
has
seriously
affected
the
stability
of
soil
ecological
environment
and
function.
In
this
study,
we
applied
high-throughput
16S
rRNA
gene
sequencing
examine
effects
low
high
doses
sodium
selenite
selenite-degrading
bacterium,
Rhodococcus
qingshengii
PM1,
on
bacterial
community
composition,
diversity,
assembly
processes
under
controlled
laboratory
conditions.
Our
results
indicated
that
strain
PM1
were
key
predictors
structure
in
selenium-contaminated
soils.
Exposure
initially
led
reductions
diversity
a
shift
dominant
groups,
an
increase
Actinobacteria
decrease
Acidobacteria.
Sodium
significantly
reduced
simplified
co-occurrence
networks,
whereas
inoculation
with
partially
reversed
these
by
enhancing
complexity.
Ecological
modeling,
including
normalized
stochasticity
ratio
(NST)
Sloan’s
neutral
model
(NCM),
suggested
stochastic
predominated
stress.
Null
analysis
further
revealed
heterogeneous
selection
drift
primary
drivers
turnover,
promoting
species
dispersal
buffering
against
negative
impacts
selenium.
These
findings
shed
light
mechanisms
contamination
highlight
potential
for
bioremediation
selenium-affected
