Coalescence characteristics of free-living and particle-attached bacteria in a cascade river-reservoir system: A case study of the Jinsha River
Journal of Environmental Management,
Год журнала:
2025,
Номер
374, С. 124088 - 124088
Опубликована: Янв. 13, 2025
Язык: Английский
Environmental drivers of microbial assembly and stability in lakes across biogeographical regions
Ecological Indicators,
Год журнала:
2025,
Номер
172, С. 113324 - 113324
Опубликована: Март 1, 2025
Язык: Английский
Seasonal dynamics of free-living (FL) and particle-attached (PA) bacterial communities in a plateau reservoir
Frontiers in Microbiology,
Год журнала:
2024,
Номер
15
Опубликована: Июль 19, 2024
In
terms
of
lifestyle,
bacterioplankton
can
be
classified
as
free-living
(FL)
and
particle-attached
(PA)
forms,
both
play
essential
roles
in
biogeochemical
cycling
aquatic
ecosystems.
Structure,
distribution,
community
assembly
FL
PA
bacteria
plateau
riverine
waterbodies
are
largely
unknown.
Therefore,
we
explored
the
seasonal
dynamics
FLand
bacterial
communities
Wujiangdu
reservoir,
Yungui
Plateau
using
16S
rRNA
gene
high-throughput
sequencing.
Results
revealed
there
was
a
significant
environmental
heterogeneity
reservoir
seasonally.
The
dominant
phylum
Actinomycetota
for
Pseudomonadota
bacteria.
Species
richness
diversity
higher
autumn
winter
compared
to
spring
summer.
general,
greater
than
FL,
but
with
some
temporal
variations.
turnover
major
contributor
β-diversity
lifestyles,
differences
were
noticed
between
composition.
Distinct
co-occurrence
network
patterns
implied
that
more
connections
exist
bacteria,
while
complex
networks
parallel
their
stronger
interactions
biofilms
on
particles.
Dispersal
limitation
driving
force
assembly.
Deterministic
processes
relatively
low
importance,
homogeneous
selection
heterogeneous
Temperature
most
important
driver
dynamics,
followed
by
nitrate
Secchi
depth
This
study
allows
better
understanding
variability
different
lifestyles
reservoirs
vulnerable
rapidly
changing
environment,
facilitating
further
microbial
research
related
global
warming
eutrophication.
Язык: Английский
Insights into cyanobacterial blooms through the lens of omics
The Science of The Total Environment,
Год журнала:
2024,
Номер
934, С. 173028 - 173028
Опубликована: Май 7, 2024
Cyanobacteria
are
oxygen-producing
photosynthetic
bacteria
that
convert
carbon
dioxide
into
biomass
upon
exposure
to
sunlight.
However,
favorable
conditions
cause
harmful
cyanobacterial
blooms
(HCBs),
which
the
dense
accumulation
of
at
water
surface
or
subsurface,
posing
threats
freshwater
ecosystems
and
human
health.
Understanding
mechanisms
underlying
bloom
formation
is
crucial
for
effective
management.
In
this
regard,
recent
advancements
in
omics
technologies
have
provided
valuable
insights
HCBs,
raised
expectations
develop
more
control
methods
near
future.
This
systematic
literature
review
aims
present
genomic
architecture,
adaptive
mechanisms,
microbial
interactions,
ecological
impacts
HCBs
through
lens
omics.
Genomic
analysis
indicates
genome
plasticity
cyanobacteria
has
enabled
their
resilience
adaptation
environmental
changes.
Transcriptomic
investigations
revealed
use
various
strategies
adapting
stress.
Additionally,
metagenomic
metatranscriptomic
analyses
emphasized
significant
role
community
regulating
HCBs.
Finally,
we
offer
perspectives
on
potential
opportunities
further
research
field.
Язык: Английский
Succession of particle-attached and free-living bacterial communities in response to microalgal dynamics induced by the biological cyanocide paucibactin A
Chemosphere,
Год журнала:
2024,
Номер
358, С. 142197 - 142197
Опубликована: Апрель 29, 2024
Microalgae,
including
cyanobacteria
and
eukaryotic
algae,
are
hotspots
of
primary
production
play
a
critical
role
in
global
carbon
cycling.
However,
these
species
often
form
blooms
that
poses
threat
to
aquatic
ecosystems.
Although
the
use
bacteria-derived
cyanocides
is
regarded
as
an
environmentally
friendly
method
for
controlling
cyanobacterial
blooms,
only
few
studies
have
examined
their
potential
impact
on
This
study
first
explore
response
particle-attached
(PA)
free-living
(FL)
bacteria
dynamics
microalgal
communities
induced
by
biological
cyanocide
paucibactin
A.
The
community
were
divided
into
two
distinct
phases
[phase
I
(days
0-2)
phase
II
3-7)].
In
I,
A
caused
sudden
decrease
concentration.
Phase
was
characterized
increased
growth
microalgae
(Scenedesmus,
Pediastrum,
Selenastrum,
Coelastrum).
stability
bacterial
contribution
stochastic
processes
assembly
more
pronounced
than
I.
triggered
coincided
with
succession
PA
FL
communities.
lysis
favored
microbial
organic
matter
degraders
both
(e.g.,
Aeromonas
Rheinheimera)
Vogesella)
II,
Lacibacter,
Phycisphaeraceae,
Hydrogenophaga
Peredibacter,
Prosthecobacter
showed
relative
abundances.
Overall,
exhibited
greater
sensitivity
sequential
compared
community.
These
results
highlight
need
evaluating
ecosystems
when
used
control
natural
blooms.
Язык: Английский
Distinct ecological niches and community dynamics: understanding free-living and particle-attached bacterial communities in an oligotrophic deep lake
Guijuan Xie,
Chuanbo Sun,
Wenlei Luo
и другие.
Applied and Environmental Microbiology,
Год журнала:
2024,
Номер
90(7)
Опубликована: Июль 24, 2024
ABSTRACT
Oligotrophic
deep-water
lakes
are
unique
and
sensitive
ecosystems
with
limited
nutrient
availability.
Understanding
bacterial
communities
within
these
is
crucial
for
assessing
ecosystem
health,
biogeochemical
cycling,
responses
to
environmental
changes.
In
this
study,
we
investigated
the
seasonal
vertical
dynamics
of
both
free-living
(FL)
particle-attached
(PA)
bacteria
in
Lake
Fuxian,
a
typical
oligotrophic
deep
freshwater
lake
southeast
China.
Our
findings
revealed
distinct
FL
PA
communities,
driven
by
similar
physiochemical
factors.
exhibited
higher
α-
β-diversity
were
enriched
Proteobacteria,
Cyanobacteria,
Firmicutes,
Patescibacteria,
Planctomycetota,
Verrucomicrobiota,
while
Actinobacteria
Bacteroidota.
showed
enrichment
putative
functions
related
chemoheterotrophy
aerobic
anoxygenic
photosynthesis,
whereas
fraction
was
intracellular
parasites
(mainly
contributed
Rickettsiales,
Chlamydiales,
Legionellales)
nitrogen
metabolism
functions.
Deterministic
processes
predominantly
shaped
assembly
stochastic
playing
greater
role
fraction.
Network
analysis
extensive
species
interactions,
proportion
positively
correlated
edges
network,
indicating
mutualistic
or
cooperative
interactions.
Cyanobium
,
Comamonadaceae,
Roseomonas
identified
as
keystone
taxa
underscoring
potential
cooperation
between
autotrophic
heterotrophic
organic
particle
microhabitats.
Overall,
disparities
diversity,
community
composition,
function,
network
characteristics
fractions
highlight
their
adaptation
ecological
niches
ecosystems.
IMPORTANCE
diversity
microbial
mechanisms,
changes
fundamental
study
aquatic
ecology.
fragile
resources,
rendering
them
highly
susceptible
fluctuations.
Examining
different
types
offers
valuable
insights
into
intricate
mechanisms
governing
strategies
across
various
scales.
our
investigation
Fuxian
China,
explored
two
types:
(PA).
unveiled
patterns
bacteria,
all
subtleties
provides
insight
thereby
influencing
overall
functioning.
Ultimately,
research
illuminates
roles
environments,
contributing
significantly
broader
comprehension
stability
health.
Язык: Английский
Microbial nitrogen cycling in Microcystis colonies and its contribution to nitrogen removal in eutrophic Lake Taihu, China
The Science of The Total Environment,
Год журнала:
2024,
Номер
954, С. 176323 - 176323
Опубликована: Сен. 17, 2024
Язык: Английский
Microcystin shapes the Microcystis phycosphere through community filtering and by influencing cross-feeding interactions
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 18, 2024
Abstract
The
cyanobacterium
Microcystis
causes
harmful
algal
blooms
(cyanoHABs)
that
pose
a
major
threat
to
human
health
and
ecosystem
services,
particularly
due
the
prevalence
of
potent
hepatotoxin
microcystin.
With
their
pronounced
EPS
layer,
colonies
also
serve
as
hub
for
heterotrophic
phycosphere
bacteria.
Here,
we
tested
hypothesis
genotypic
plasticity
in
its
ability
produce
microcystin
influences
composition
assembly
microbiome.
In
an
analysis
individual
natural
bloom,
observed
significantly
reduced
richness
community
presence
biosynthesis
genes.
A
subsequent
synthetic
experiment
with
21
strains
co-cultivation
either
wild-type
strain
M.
aeruginosa
PCC
7806
or
microcystin-free
mutant
Δ
mcyB
revealed
not
only
tug-of-war
between
phototrophic
bacteria,
but
reciprocal
dominance
two
isolates
genus
Sphingomonas
Flavobacterium
.
contrast,
Agrobacterium
isolate
thrived
equally
well
both
consortia.
substrate
utilization
tests,
showed
strongest
dependence
on
exudates
clear
preference
strain.
Genome
sequencing
high
potential
complementary
cross-feeding,
no
degradation.
We
postulate
strain-specific
functional
traits,
such
perform
photorespiration
vitamin
B12,
play
crucial
role
cross-feeding
interactions,
is
one
determining
factors
interference
inorganic
carbon
metabolism.
Язык: Английский
Microcystin shapes the Microcystis phycosphere through community filtering and by influencing cross-feeding interactions
ISME Communications,
Год журнала:
2024,
Номер
5(1)
Опубликована: Дек. 24, 2024
The
cyanobacterium
Microcystis
causes
harmful
algal
blooms
that
pose
a
major
threat
to
human
health
and
ecosystem
services,
particularly
due
the
prevalence
of
potent
hepatotoxin
microcystin
(MC).
With
their
pronounced
EPS
layer,
colonies
also
serve
as
hub
for
heterotrophic
phycosphere
bacteria.
Here,
we
tested
hypothesis
genotypic
plasticity
in
its
ability
produce
MC
influences
composition
assembly
microbiome.
In
an
analysis
individual
natural
bloom,
observed
significantly
reduced
richness
community
presence
biosynthesis
genes.
A
subsequent
synthetic
experiment
with
21
bacterial
strains
co-cultivation
either
wild-type
strain
aeruginosa
PCC
7806
or
MC-free
mutant
ΔmcyB
revealed
not
only
tug-of-war
between
phototrophic
bacteria,
but
reciprocal
dominance
two
isolates
genus
Sphingomonas
Flavobacterium.
contrast,
Agrobacterium
isolate
thrived
equally
well
both
consortia.
substrate
utilization
tests,
showed
strongest
dependence
on
exudates
clear
preference
strain.
Genome
sequencing
high
potential
complementary
cross-feeding,
no
degradation.
We
postulate
strain-specific
functional
traits,
such
perform
glycolate
oxidation,
play
crucial
role
cross-feeding
interactions,
is
one
determining
factors
interference
inorganic
carbon
metabolism.
Язык: Английский