Microorganisms,
Год журнала:
2025,
Номер
13(2), С. 319 - 319
Опубликована: Фев. 1, 2025
Microorganisms
are
instrumental
in
river
ecosystems
and
participate
biogeochemical
cycles.
It
is
thought
that
dynamic
hydrological
processes
rivers
influence
microbial
community
assembly,
but
the
seasonal
succession
assembly
of
sediments
on
Loess
Plateau
remain
unclear.
This
study
used
high-throughput
sequencing
technology
(16S
ITS)
neutral
model
to
analyze
associated
with
communities
Dali
River,
a
tributary
Yellow
River
Plateau.
The
results
showed
sediment
bacterial
fungal
diversity
indexes
non-flood
season
were
1.03–3.15
times
greater
than
those
flood
season.
There
obvious
variations
between
seasons
microorganisms.
similarities
among
all,
abundant,
rare
decreased
as
geographical
distance
increased.
Proteobacteria
(52.5–99.6%)
Ascomycota
(22.0–34.2%)
primary
phyla
communities.
Sediment
ammonia
nitrogen,
water
temperature,
organic
carbon
significantly
affected
(p
<
0.05)
structure
microorganism
ecological
networks
for
had
complex
topological
parameters.
was
driven
by
deterministic
processes,
while
dominated
stochastic
processes.
These
expanded
understanding
about
characteristics
provided
insights
into
factors
driving
networks.
Journal of Hydrology Regional Studies,
Год журнала:
2024,
Номер
51, С. 101650 - 101650
Опубликована: Янв. 7, 2024
Hulun
Lake
Basin,
Northern
China
Understanding
lacustrine
groundwater
discharge
(LGD)
is
important
for
elucidating
the
hydrological
cycle
and
sustainable
use
of
water
resources.
largest
fresh
lake
has
prominent
ecological
function
in
North
China.
However,
effect
on
balance
spatial
distribution
LGD
under
different
aquifers
have
not
yet
been
evaluated
detail.
Herein,
radium
(223Ra,
224Ra,
228Ra)
stable
isotopes
(δD,
δ18O)
were
used
to
identify
locations
quantify
flux
into
lake.
The
Ra
isotope
activities
from
fissured
bedrock
western
part
are
depleted
relative
those
east,
underlain
by
Quaternary
unconsolidated
sediments
aquifer
overlying
granitic
rocks.
heterogeneous
was
revealed
fractured
predominant
source
estimated
range
(1.07
±
1.36)×
107
(6.54
1.89)×
m3/d,
which
exceeds
that
one
order
magnitude
due
high
permeability
enlarged
via
tectonic
faults
fractures.
These
findings
promote
scientific
understanding
instructional
studies
freshwater
lakes
with
complex
systems
cold
arid
regions.
Frontiers in Environmental Science,
Год журнала:
2024,
Номер
12
Опубликована: Янв. 29, 2024
Taihu
Lake
is
the
third-largest
freshwater
lake
in
China
and
vital
as
a
drinking
water
source,
well
for
irrigation
water,
flood
control,
other
functions.
connected
to
many
inflow
rivers,
which
contribute
resource
but
also
its
pollution.
Investigating
correlation
between
quality,
bacterial
community
structure,
land-use
types
essential
pollution
control.
Yet,
few
studies
have
been
conducted
on
all
major
rivers
of
Lake.
This
study
aimed
assess
composition
determine
relationship
community,
land-use.
Water
samples
were
collected
from
ten
across
four
seasons
2019–2020.
DNA
extracted
was
used
16S
rRNA
gene-targeted
next-generation
sequencing
structures.
Thirteen
physicochemical
microbiological
parameters
pattern
surrounding
each
sampling
location
profiled.
The
demonstrated
significant
seasonal
variation.
In
summer,
variation
correlated
with
chlorophyll
,
pH,
phosphate-P,
electric
conductivity,
nitrate-N,
ammonium-N
winter.
Rivers
northwest
more
nutrient-rich
than
those
southwest.
industrial,
residential,
agricultural
categories
strongly
nutrient
parameters.
Accordingly,
farmland
drainage,
untreated
domestic
wastewater,
industrial
identified
objectives
effective
quality
management
region.
Microorganisms,
Год журнала:
2023,
Номер
11(2), С. 496 - 496
Опубликована: Фев. 16, 2023
The
Yellow
River
is
a
valuable
resource
in
the
Ningxia
Hui
Autonomous
Region
and
plays
vital
role
local
human
activities
biodiversity.
Bacteria
are
crucial
component
of
river
ecosystems,
but
driving
factors
assembly
mechanisms
bacterial
community
structure
this
region
remain
unclear.
Herein,
we
documented
composition,
determinants,
co-occurrence
pattern,
mechanism
for
surface
water
sediment.
In
comparison
to
sediment,
bacterioplankton
showed
significant
seasonal
variation,
as
well
less
diversity
abundance.
network
topology
parameters
indicated
that
sediment
was
more
stable
than
water,
had
higher
connectivity.
lotic
ecosystem,
CODMn,
Chl
a,
pH
affected
community,
while
TP
primary
factor
influencing
community.
combined
results
neutral
model
phylogenetic
null
indicate
Bacterial
communities
both
habitats
were
mainly
by
stochastic
processes,
with
ecological
processes
dominated
drift
dispersal
limitation
bacteria.
These
provide
essential
insights
into
future
research
on
microbial
ecology,
environmental
monitoring,
classified
management
section
River.
