Land,
Год журнала:
2024,
Номер
13(10), С. 1557 - 1557
Опубликована: Сен. 25, 2024
Excess
nitrogen
in
agricultural
drainage
poses
a
serious
threat
to
the
water
quality
safety
of
Yellow
River
basin.
Utilizing
aquatic
plants
modify
rhizosphere
microbial
community
structure
and
facilitate
transformation
is
crucial
strategy
for
mitigating
regional
eutrophication.
We
here
compare
key
processes
occurring
sediments
ditch
artificially
planted
with
mix
species
(Phragmites
australis,
Typha
orientalis,
Nymphaea
tetragon)
occupied
by
naturally
vegetation,
dominated
either
P.
australis
or
T.
orientalis.
Our
results
revealed
effect,
an
increased
denitrification
rate
(DR)
dissimilatory
nitrate
reduction
ammonium
(DNRAR)
cultivated
compared
orientalis
vegetation.
The
fixation
(NFR)
artificial
setting
comparison
natural
richness
bacterial
relative
abundances
Bacteroidota,
Firmicutes,
Geobacter
were
significantly
greater
due
availability
organic
carbon.
In
ditch,
dominant
functional
genes
affecting
DRNARs
nrfC
nrfA,
whereas
DRs
driven
mainly
norB
napA,
which
influenced
carbon
levels.
NFRs
nifD,
nifK,
nifH.
provide
scientific
basis
use
excess
levels
drainage.
Abstract
Epiphytic
bacteria
constitute
a
vital
component
of
aquatic
ecosystems,
pivotal
in
regulating
elemental
cycling.
Despite
their
significance,
the
diversity
and
functions
epiphytic
bacterial
communities
adhering
to
various
submerged
macrophytes
remain
largely
unexplored.
In
this
study,
we
employed
metagenomic
approach
investigate
function
associated
with
six
macrophytes:
Ceratophyllum
demersum
,
Hydrilla
verticillata
Myriophyllum
verticillatum
Potamogeton
lucens
Stuckenia
pectinata
Najas
marina
.
The
results
revealed
that
predominant
species
for
each
plant
type
included
Pseudomonas
spp.,
Microbacterium
Stenotrophomonas
rhizophila
Multiple
comparisons
linear
discriminant
analysis
effect
size
indicated
significant
divergence
community
composition
among
macrophytes,
0.3–1%
uniquely
identified.
richness
S.
significantly
differed
from
both
C.
H.
although
no
differences
were
observed
evenness.
Functionally,
notable
variations
relative
abundances
genes
carbon,
nitrogen,
phosphorus
cycling
within
on
macrophyte
hosts.
Among
these
communities,
exhibited
enrichment
related
3-hydroxypropionate
bicycle
nitrogen
assimilation,
translocation,
denitrification.
Conversely,
M.
showcased
linked
reductive
citric
acid
cycle
(Arnon-Buchanan
cycle),
pentose
phosphate
(Calvin
polyphosphate
degradation,
organic
metabolism.
summary,
our
findings
offer
valuable
insights
into
leaves,
shedding
light
roles
lake
ecosystems.
Heliyon,
Год журнала:
2024,
Номер
10(3), С. e25942 - e25942
Опубликована: Фев. 1, 2024
Healthy
aquatic
ecosystems
are
essential
for
human
beings.
However,
anthropogenic
activities
severely
worsen
water
quality.
In
this
study,
using
assembling
mesocosms,
we
developed
an
efficient
and
easy-to-handle
method
to
monitor
the
quality
by
measuring
electrical
conductivity
(EC)
of
water.
Our
data
demonstrate
that
growth
two
submersed
macrophytes,
Vallisneria
natans
spinulosa,
improves
decreasing
EC.
Furthermore,
high-throughput
DNA
sequencing,
analyzed
microbial
community
abundance
structure
in
sediment
columns
with
or
without
plant
growth.
We
generated
33,775
amplicon
sequence
variants
from
69
samples
four
groups
(BkM,
CtM,
VnR,
VsR)
three
column
sample
(CtW,
VnW,
VsW).
The
results
show
relative
bacteria
was
higher
than
column.
Moreover,
diversity
composition
microbiomes
were
altered
spp.
growth,
α-diversity
communities
decreased
due
macrophytes
both
columns.
β-diversity
also
varied
significantly
