Frontiers in Marine Science,
Journal Year:
2022,
Volume and Issue:
8
Published: Jan. 13, 2022
Symbioses
between
eukaryotes
and
their
associated
microbial
communities
are
fundamental
processes
that
affect
organisms’
ecology
evolution.
A
unique
example
of
this
is
reef-building
corals
maintain
symbiotic
associations
with
dinoflagellate
algae
(Symbiodiniaceae)
bacteria
coral
health
through
various
mechanisms.
However,
little
understood
about
how
coral-associated
holobiont
heat
tolerance.
In
study,
we
investigated
these
interactions
in
four
Pocillopora
colonies
belonging
to
three
cryptic
species
by
subjecting
fragments
treatments
antibiotics
intended
suppress
the
normal
community,
followed
acute
stress.
Separate
only
or
stress
were
conducted
compare
effects
individual
stressors
on
transcriptome
responses
microbiome
shifts.
Across
all
examined,
combined
treatment
significantly
altered
caused
major
changes
both
Cladocopium
algal
symbiont
gene
expression.
Individually,
impaired
protein
translation
activated
DNA
repair
processes,
while
downregulation
amino
acid
inorganic
ion
transport
metabolism
genes
photosynthesis
genes.
Combined
antibiotics-heat
synergistic
expression
including
enhanced
oxidative
response
genes,
programed
cell
death
pathways
proteolytic
enzymes
indicate
an
exacerbated
following
community
suppression.
Collectively,
results
provide
further
evidence
Symbiodiniaceae
engage
highly
coordinated
metabolic
crucial
for
health,
homeostasis,
Communications Biology,
Journal Year:
2023,
Volume and Issue:
6(1)
Published: April 6, 2023
Abstract
Considered
one
of
the
most
devastating
coral
disease
outbreaks
in
history,
stony
tissue
loss
(SCTLD)
is
currently
spreading
throughout
Florida’s
reefs
and
greater
Caribbean.
SCTLD
affects
at
least
two
dozen
different
species
has
been
implicated
extensive
losses
cover.
Here
we
show
Pseudoalteromonas
sp.
strain
McH1-7
broad-spectrum
antibacterial
activity
against
SCTLD-associated
bacterial
isolates.
Chemical
analyses
indicated
produces
potential
antibacterials,
korormicin
tetrabromopyrrole,
while
genomic
analysis
identified
genes
potentially
encoding
an
L-amino
acid
oxidase
multiple
metalloproteases
(pseudoalterins).
During
laboratory
trials,
arrested
or
slowed
progression
on
68.2%
diseased
Montastraea
cavernosa
fragments
treated
(
n
=
22),
it
prevented
transmission
by
100%
12).
chemically
characterized
probiotic
that
effective
prophylactic
direct
treatment
for
destructive
as
well
a
alternative
to
antibiotic
use.
Communications Biology,
Journal Year:
2024,
Volume and Issue:
7(1)
Published: April 9, 2024
Beneficial
microorganisms
for
corals
(BMCs),
or
probiotics,
can
enhance
coral
resilience
against
stressors
in
laboratory
trials.
However,
the
ability
of
probiotics
to
restructure
microbiome
situ
is
yet
be
determined.
As
a
first
step
elucidate
this,
we
inoculated
putative
probiotic
bacteria
(pBMCs)
on
healthy
colonies
Pocillopora
verrucosa
Red
Sea,
three
times
per
week,
during
3
months.
pBMCs
significantly
influenced
microbiome,
while
surrounding
seawater
and
sediment
remained
unchanged.
The
genera
Halomonas,
Pseudoalteromonas,
Bacillus
were
enriched
probiotic-treated
corals.
Furthermore,
treatment
also
correlated
with
an
increase
other
beneficial
groups
(e.g.,
Ruegeria
Limosilactobacillus),
decrease
potential
pathogens,
such
as
Vibrio.
all
(treated
non-treated)
throughout
experiment,
could
not
track
health
improvements
protection
stress.
Our
data
indicate
that
healthy,
therefore
stable,
microbiomes
restructured
situ,
although
repeated
continuous
inoculations
may
required
these
cases.
Further,
our
study
provides
supporting
evidence
that,
at
studied
scale,
have
no
detectable
off-target
effects
near
PLoS ONE,
Journal Year:
2022,
Volume and Issue:
17(11), P. e0273325 - e0273325
Published: Nov. 30, 2022
While
coral
reefs
in
Australia
have
historically
been
a
showcase
of
conventional
management
informed
by
research,
recent
declines
cover
triggered
efforts
to
innovate
and
integrate
intervention
restoration
actions
into
frameworks.
Here
we
outline
the
multi-faceted
approaches
that
developed
since
2017,
from
newly
implemented
in-water
programs,
research
enhance
resilience
investigations
socio-economic
perspectives
on
goals.
We
describe
projects
using
gardening,
substrate
stabilisation,
repositioning,
macro-algae
removal,
larval-based
techniques.
Three
areas
focus
are
also
presented
illustrate
breadth
Australian
restoration,
(1)
transdisciplinary
Reef
Restoration
Adaptation
Program
(RRAP),
one
world’s
largest
development
programs
focused
reefs,
(2)
interventions
performance
under
climate
change,
(3)
socio-cultural
perspectives.
Together,
these
reflect
an
increasing
urgency
for
action
confront
reef
crisis,
develop
new
additional
tools
manage
consequent
increase
funding
opportunities
appetite
implementation.
The
rapid
progress
trialling
deploying
builds
decades
overseas
experience,
advances
showing
positive
signs
can
be
valuable
tool
improve
at
local
scales
(i.e.,
high
early
survival
rates
across
variety
methods
species,
strong
community
engagement
with
stakeholders).
RRAP
is
creating
help
multiple
scales,
micro
targeting
small
within
specific
site)
large
core
ecosystem
function
social-economic
values
select
sites
Great
Barrier
Reef)
resist,
adapt
recover
impacts
change.
None
aim
single-handedly
restore
entirety
Reef,
nor
do
they
negate
importance
urgent
change
mitigation
action.
Trends in Microbiology,
Journal Year:
2023,
Volume and Issue:
32(3), P. 252 - 269
Published: Sept. 25, 2023
The
provision
of
probiotics
benefits
the
health
a
wide
range
organisms,
from
humans
to
animals
and
plants.
Probiotics
can
enhance
stress
resilience
endangered
many
which
are
critically
threatened
by
anthropogenic
impacts.
use
so-called
'probiotics
for
wildlife'
is
nascent
application,
field
needs
reflect
on
standards
its
development,
testing,
validation,
risk
assessment,
deployment.
Here,
we
identify
main
challenges
this
emerging
intervention
provide
roadmap
validate
effectiveness
wildlife
probiotics.
We
cover
essential
inert
negative
controls
in
trials
investigation
probiotic
mechanisms
action.
also
suggest
alternative
microbial
therapies
that
could
be
tested
parallel
with
application.
Our
recommendations
align
approaches
used
humans,
aquaculture,
plants
concept
wildlife.
Communications Biology,
Journal Year:
2025,
Volume and Issue:
8(1)
Published: Jan. 6, 2025
Over
the
past
decades,
human
impacts
have
changed
structure
of
tropical
benthic
reef
communities
towards
coral
depletion
and
macroalgal
proliferation.
However,
how
these
changes
modified
chemical
microbial
waterscapes
is
poorly
known.
Here,
we
assessed
experimental
removal
assemblages
influences
composition
two
boundary
layers,
momentum.
Chemical
were
spatially
structured,
both
horizontally
vertically,
according
to
dominance
layers.
Microbes
associated
with
degradation
enriched
in
layers
surrounding
macroalgal-dominated
substrata.
Dominant
macroalgae
surrounded
by
a
distinct
pool
diverse
lipid
classes
(e.g.,
diterpenoids
glycerolipids)
labile
organic
matter
organooxygen
compounds),
which
diffused
from
algal
tissues
their
polarity.
Finally,
our
results
highlighted
strong
co-variations
between
specific
algal-derived
metabolites
planktonic
microbes,
giving
insight
into
roles
functioning
resilience.
Environmental Microbiology,
Journal Year:
2025,
Volume and Issue:
27(2)
Published: Jan. 31, 2025
Corals
associate
with
a
diverse
community
of
prokaryotic
symbionts
that
provide
nutrition,
antioxidants
and
other
protective
compounds
to
their
host.
However,
the
influence
microbes
on
coral
thermotolerance
remains
understudied.
Here,
we
examined
microbial
communities
associated
colonies
Acropora
cf.
tenuis
exhibit
high
or
low
upon
exposure
33°C
(heated)
relative
29°C
(control).
Using
16S
rRNA
sequencing,
show
structure
all
A.
was
similar
each
at
control
temperature.
Thermotolerant
colonies,
however,
had
relatively
greater
abundance
Endozoicomonas,
Arcobacter,
Bifidobacterium
Lactobacillus.
At
elevated
temperature,
only
thermosensitive
showed
distinct
shift
in
microbiome,
an
increase
Flavobacteriales,
Rhodobacteraceae
Vibrio,
accompanying
marked
bleaching
response.
Functional
prediction
indicated
thermotolerant
corals
were
enriched
for
genes
related
metabolism,
while
microbiomes
cell
motility
antibiotic
compound
synthesis.
These
differences
may
contribute
variable
performance
under
thermal
stress.
Identification
taxa
correlated
provides
insights
into
beneficial
bacterial
groups
could
be
used
microbiome
engineering
support
reef
health
changing
climate.