Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: June 19, 2024
Dissimilatory
nitrate
reduction
to
ammonium
(DNRA)
is
an
important
pathway
in
freshwater
sediments.
Many
studies
have
focused
on
the
DNRA
process
various
natural
habitats.
However,
joint
operation
of
cascade
reservoirs
will
affect
physical
and
chemical
properties
sediments,
which
may
change
bacterial
community
pattern
surface
sediments
reservoirs.
Our
study
was
first
investigate
spatiotemporal
distribution
patterns
potential
rate,
nrfA
gene
abundances,
diversity
Lancang
River
The
results
slurry
incubation
experiments
combined
with
15
N
isotope
tracer
experiment
ascertained
that
rates
were
0.01–0.15
nmol-N
cm
−3
h
−1
,
qPCR
indicated
abundance
range
1.08
×
10
5
–2.51
6
copies
g
dry
weight.
High
throughput
sequencing
revealed
relative
Anaeromyxobacter
(4.52%
average),
Polyangium
(4.09%),
Archangium
(1.86%),
Geobacter
(1.34%),
Lacunisphaera
(1.32%)
high.
Pearson
RDA
correlation
analysis
exhibited
positively
correlated
altitude,
pH,
OC,
sand
concentration.
reservoir
age
rate.
deterministic
environmental
selection
plays
a
crucial
role
formation
community.
Network
displayed
dominant
genus
key
population
microbial
This
reveals
variation
activity
structure
largely
driven
by
construction
reservoirs,
provides
new
idea
for
further
understanding
characteristics
ecosystem.
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: Dec. 23, 2024
Introduction
Coastal
wetlands
play
an
important
role
in
the
global
ecosystem,
yet
they
are
increasingly
facing
ecological
degradation
due
to
pollution
and
spread
of
invasive
Spartina
alterniflora
(S.
alterniflora)
.
Among
environmental
challenges,
microplastics
(MPs)
contamination
S.
-invaded
coastal
is
growing
concern.
However,
effects
MPs
not
clear.
Methods
This
study
investigated
altemiflora
invasion
on
distribution
physicochemical
properties
sediments
structure
microbial
communities
Tiaozini
wetland
Jiangsu
Province,
China.
Results
discussion
The
total
abundance
single-plant
area
was
highest
(16.338
x10
3
items/kg
d.w.).
Polyurethane
Chlorinated
polyisoprene
typical
types
area.
exhibits
high
at
all
sampling
sites,
while
one
dominant
sub-mature
results
showed
that
promoted
accumulation
wetland.
increased
organic
carbon
(TOC),
available
phosphorus
(AP)
nitrogen
(TN)
contents.
Moreover,
ALP
SUC
enzyme
activities
sediment.
In
addition,
Proteobacteria
Bacteroidota
sediments.
highlights
complex
interactions
between
invasion,
providing
foundation
for
understanding
synergistic
impacts
these
stressors
ecosystems.
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: June 19, 2024
Dissimilatory
nitrate
reduction
to
ammonium
(DNRA)
is
an
important
pathway
in
freshwater
sediments.
Many
studies
have
focused
on
the
DNRA
process
various
natural
habitats.
However,
joint
operation
of
cascade
reservoirs
will
affect
physical
and
chemical
properties
sediments,
which
may
change
bacterial
community
pattern
surface
sediments
reservoirs.
Our
study
was
first
investigate
spatiotemporal
distribution
patterns
potential
rate,
nrfA
gene
abundances,
diversity
Lancang
River
The
results
slurry
incubation
experiments
combined
with
15
N
isotope
tracer
experiment
ascertained
that
rates
were
0.01–0.15
nmol-N
cm
−3
h
−1
,
qPCR
indicated
abundance
range
1.08
×
10
5
–2.51
6
copies
g
dry
weight.
High
throughput
sequencing
revealed
relative
Anaeromyxobacter
(4.52%
average),
Polyangium
(4.09%),
Archangium
(1.86%),
Geobacter
(1.34%),
Lacunisphaera
(1.32%)
high.
Pearson
RDA
correlation
analysis
exhibited
positively
correlated
altitude,
pH,
OC,
sand
concentration.
reservoir
age
rate.
deterministic
environmental
selection
plays
a
crucial
role
formation
community.
Network
displayed
dominant
genus
key
population
microbial
This
reveals
variation
activity
structure
largely
driven
by
construction
reservoirs,
provides
new
idea
for
further
understanding
characteristics
ecosystem.
