Adaptation of Archaeal Communities to Summer Hypoxia in the Sediment of Bohai Sea
Ecology and Evolution,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 1, 2025
ABSTRACT
Understanding
the
adaptation
of
archaea
to
hypoxia
is
essential
for
deciphering
functions
and
mechanisms
microbes
when
suffering
environmental
changes.
However,
dynamics
responses
sedimentary
in
Bohai
Sea
are
still
unclear.
In
this
study,
diversity,
composition,
distribution
archaeal
community
sediment
along
an
inshore–offshore
transect
across
oxygen‐depleted
area
were
investigated
June,
July,
August
2021
by
employing
high‐throughput
sequencing
16S
rRNA
gene.
Results
indicated
that
communities
dominated
Thermoproteota
(80.61%),
Asgardarchaeota
(8.70%),
Thermoplasmatota
(5.27%).
Dissolved
oxygen
(DO)
NO
3
−
two
key
factors
shaping
communities,
accounting
49.5%
38.3%
total
variabilities
(
p
<
0.05),
respectively.
With
intensity
depletion,
diversity
increased
significantly.
Microbial
networks
revealed
Bathyarchaeia
played
a
role
interacting
with
both
bacteria
other
groups.
Furthermore,
adaptions
also
displayed
variation
relative
abundance
predicted
ecological
metabolic
pathways.
The
enrichment
specific
nitrogen
transformation
enzymes
showed
potential
fixation
removal,
which
might
contribute
balance
N
budget
thus
facilitate
restoration
under
eutrophication
Sea.
Our
results
provided
new
picture
on
archaea,
will
be
beneficial
further
investigations
extreme
environments
theoretically
practically.
Язык: Английский
Longitudinal Variability in the Oxygen Demand of Channel Bed Matrix Sediment in a UK Agricultural Catchment: Implications for Managing the Sediment Problem
River Research and Applications,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 3, 2025
ABSTRACT
The
presence
of
excess
fine‐grained
matrix
sediment
in
channel
beds
can
exert
an
oxygen
demand
this
critical
habitat
for
fish
spawning
and
invertebrates.
Therefore,
reducing
the
bed
through
targeted
intervention
may
deliver
better
cost–benefit
from
catchment
management.
To
assess
potential
interventions
to
benefits,
(SOD)
was
measured
pools,
riffles,
bars,
runs
at
nine
sites
along
River
Taw
southwest
UK.
This
river
flows
upland
semi‐natural
grassland,
lowland
agriculture
with
sewage
treatment
work
discharges.
SOD
5
days
on
<
25
μm
fraction
using
a
laboratory‐based
dissolved
probe.
Samples
sources
were
also
analysed,
colour‐based
method
used
determine
provenance
sediment.
did
not
vary
significantly
longitudinally
or
by
riverine
feature
higher
than
its
sources.
Using
settling
isolate
ultra‐fine
showed
highest
concentrated
here.
entrapment
autochthonous
algal
material
is
probable
source
high
SOD.
Since
within‐stream
productivity
likely
be
challenging,
combined
approach
targeting
protection
water
erosion
in‐channel
measures
increase
exfiltration
warranted.
would
reduce
reduction
pore
spaces
fine
ingress,
thereby
limiting
controlling
Язык: Английский
Study on the Remediation Effect of the CaO<sub>2</sub>/Nitrobacteria-Reed Combined System on Black and Odorous Water Bodies
Advances in Environmental Protection,
Год журнала:
2025,
Номер
15(04), С. 531 - 544
Опубликована: Янв. 1, 2025
Язык: Английский
Isolation and identification of a native bacterium Citrobacter farmeri against microcystin-LR in anaerobic environments
Journal of Toxicology and Environmental Health,
Год журнала:
2024,
Номер
88(8), С. 329 - 338
Опубликована: Дек. 30, 2024
Microcystin-LR
(MC-LR),
produced
by
cyanobacterial
harmful
algal
blooms,
poses
a
serious
threat
to
aquatic
ecosystems
and
human
health.
Biodegradation
is
an
important
method
for
MC-LR
elimination.
Aerobic
biodegradation
has
been
extensively
studied
many
bacteria
were
identified.
However,
few
MC-degrading
have
isolated
from
anaerobic
environments,
these
degradation
mechanisms
are
poorly
understood.
The
aim
of
this
study
was
collect
lake
sediments
in
Lake
Taihu
using
acclimation
culture
assess
biodegradation.
Five
strains
with
ability
isolated,
strain
A4
belonging
Citrobacter
farmeri
(C.
farmeri).
exhibiting
the
highest
efficiency
at
0.486
μg/ml/d.
High-performance
liquid
chromatography
(HPLC)
identified
two
novel
products.
Further
polymerase
chain
reaction
(PCR)
analysis
suggested
that
C.
did
not
possess
known
gene
mlrABCD,
suggesting
involvement
mlrABCD-independent
pathway.
Data
demonstrated
bacterial
found
exhibited
high
properties,
which
indicated
may
constitute
biological
removal
natural
environment.
Язык: Английский