PeerJ,
Journal Year:
2024,
Volume and Issue:
12, P. e18365 - e18365
Published: Nov. 8, 2024
Marine
sponges
are
dominant
components
of
Antarctic
benthos
and
representative
the
high
endemism
that
characterizes
this
environment.
All
microbial
groups
part
sponge
holobionts,
but
eukaryotes
have
been
studied
less,
their
symbiotic
role
still
needs
to
be
better
understood.
Here,
we
characterize
dynamics
associated
with
sponges,
focusing
on
dinoflagellates
over
three
summer
periods
understand
members,
interannual
variations,
trophic
lifestyle
strategies.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
9
Published: Jan. 19, 2023
Introduction
Sponges
are
key
components
of
marine
benthic
communities,
providing
many
ecosystem
functions
and
establishing
close
relationships
with
microorganisms,
conforming
the
holobiont.
These
symbiotic
microbiotas
seem
to
be
host
species-specific
highly
diverse,
playing
roles
in
their
sponge
host.
The
effects
elevated
seawater
temperature
on
sponges
microbiota
still
poorly
known,
whether
from
polar
areas
more
sensitive
these
impacts
respect
temperate
tropical
species
is
totally
unknown.
Methods
We
analyzed
microbiomes
different
natural
habitat
after
exposure
heat
stress
aquaria
by
16S
rRNA
amplicon
sequencing
(1)
characterize
covering
a
latitudinal
gradient
(polar,
environments),
(2)
asses
thermal
microbial
communities.
Results
Bacterial
communities’
structure
was
also
surrounding
seawater.
core
microbiome
maintained
most
stress,
although
they
would
recover
normal
conditions
previous
remains
yet
further
investigated.
observed
increased
abundances
transient
bacteria
unknown
origin
exposed
stress.
Discussion
Some
may
opportunistic
that
benefit
stress-associated
dysregulation
occupying
new
niches
According
our
results,
Antarctic
waters
could
resilient
than
sponges.
Both
composition
changes
produced
quite
species-specific,
thus,
depend
species.
Under
global
change
scenario,
will
probably
those
suffering
therefore
dramatic
for
ecosystems
since
fundamental
part
them.
Marine Drugs,
Journal Year:
2022,
Volume and Issue:
20(10), P. 617 - 617
Published: Sept. 29, 2022
Microbe–invertebrate
associations,
commonly
occurring
in
nature,
play
a
fundamental
role
the
life
of
symbionts,
even
hostile
habitats,
assuming
key
importance
for
both
ecological
and
evolutionary
studies
relevance
biotechnology.
Extreme
environments
have
emerged
as
new
frontier
natural
product
chemistry
search
novel
chemotypes
microbial
origin
with
significant
biological
activities.
However,
to
date,
main
focus
has
been
microbes
from
sediment
seawater,
whereas
those
associated
biota
received
significantly
less
attention.
This
review
therefore
conceived
summarize
information
on
invertebrate–bacteria
associations
that
are
established
extreme
marine
environments.
After
brief
overview
currently
known
their
characteristics,
report
between
extremophilic
microorganisms
macrobenthic
organisms
such
habitats
is
provided.
The
second
part
deals
biotechnologically
relevant
bioactive
molecules
involved
establishing
maintaining
symbiotic
associations.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
916, P. 170171 - 170171
Published: Jan. 19, 2024
Ocean
Acidification
(OA)
profoundly
impacts
marine
biochemistry,
resulting
in
a
net
loss
of
biodiversity.
Porifera
are
often
forecasted
as
winner
taxa,
yet
the
strategies
to
cope
with
OA
can
vary
and
may
generate
diverse
fitness
status.
In
this
study,
microbial
shifts
based
on
V
Microbial Ecology,
Journal Year:
2025,
Volume and Issue:
88(1)
Published: May 17, 2025
Microbial
communities
in
Antarctic
marine
sponges
have
distinct
taxonomic
and
functional
profiles
due
to
low
temperatures,
seasonal
days
nights,
geographic
isolation.
These
sponge
holobionts
contribute
nutrient
cycling,
structural
habitat
formation,
benthic
ecosystem
resilience.
We
review
holobiont
knowledge,
integrating
culture-based
molecular
data
across
environmental
gradients.
Although
microbiome
exist
for
only
a
fraction
of
the
region's
593
known
species,
these
hosts
support
diverse
symbionts
spanning
at
least
63
bacterial,
5
archaeal,
6
fungal
phyla,
highlighting
complexity
ecological
significance
understudied
polar
microbiomes.
A
conserved
core
microbiome,
dominated
by
Proteobacteria,
Bacteroidetes,
Nitrospinae,
Planctomycetes,
occurs
sponges,
alongside
taxa
shaped
host
identity,
depth,
environment.
Metagenomic
indicate
microbial
nitrogen
chemoautotrophic
carbon
fixation,
stress
tolerance.
Despite
advances,
major
knowledge
gaps
remain,
particularly
deep-sea
sub-Antarctic
regions,
along
with
challenges
taxonomy,
methodological
biases,
limited
insights.
identify
key
research
priorities,
including
developing
standardised
methodologies,
expanded
sampling
depth
gradients,
multi-omics
metadata.
provide
tractable
model
investigating
symbiosis,
adaptation,
processes
one
Earth's
most
rapidly
changing
environments.
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: Feb. 9, 2024
Introduction
Antarctic
Porifera
have
gained
increasing
interest
as
hosts
of
diversified
associated
microbial
communities
that
could
provide
interesting
insights
on
the
holobiome
system
and
its
relation
with
environmental
parameters.
Methods
The
demosponge
species
Haliclona
dancoi
scotti
were
targeted
for
determination
persistent
organic
pollutant
(i.
e.,
polychlorobiphenyls,
PCBs,
polycyclic
aromatic
hydrocarbons,
PAHs)
trace
metal
concentrations,
along
characterization
prokaryotic
by
16S
rRNA
next
generation
sequencing,
to
evaluate
possible
relationships
between
accumulation
(e.g.,
a
stress
factor)
community
composition
in
sponges.
To
best
our
knowledge,
this
approach
has
been
never
applied
before.
Results
Notably,
both
chemical
microbiological
data
H.
(a
quite
rare
Ross
Sea)
are
here
reported
first
time,
well
PAHs
Porifera.
Both
sponge
generally
contained
higher
amounts
pollutants
than
surrounding
sediment
seawater,
thus
demonstrating
their
capability.
structure
communities,
even
if
differing
at
order
genus
levels
two
species,
was
dominated
Proteobacteria
Bacteroidota
(with
Archaea
abundances
negligible)
appeared
sharp
contrast
inhabiting
bulk
environment.
Discussions
suggested
some
bacterial
groups
significantly
(positively
or
negatively)
correlated
occurrence
certain
contaminants.
Diversity,
Journal Year:
2024,
Volume and Issue:
16(3), P. 162 - 162
Published: March 5, 2024
This
work
completes
and
updates
the
information
about
diversity
distribution
of
benthic
assemblages
in
an
Antarctic
fjord
(South
Bay,
Peninsula)
40
years
after
first
only
community-level
study
was
conducted
there.
To
determine
community
changes,
a
photographic
survey
at
four
sites
with
different
substrate
inclinations
along
bathymetric
gradient
5–20
m
depth.
In
total,
160
photoquadrats
were
analyzed,
resulting
total
area
m2.
Sixty
taxa
represented
by
12
phyla
identified,
which
eight
corresponded
to
animals.
The
remaining
species
macroalgae
diatoms,
both
presenting
highest
coverages
entire
area.
richness
values
obtained
greater
depths
steepest
slopes.
Here,
we
discuss
role
inclination
depth
structure
concerning
possible
variations
presence
frequency
physical
disturbances
(e.g.,
ice
disturbance
sedimentation).
abundances,
densities,
distributions
all
found
are
detailed,
updating
ecological
data
ecosystem
this
from
previously
published
assessment
decades
ago.
continent
where
rapid
environmental
changes
being
experienced
due
climate-induced
processes,
massive
record
diatoms
striking
absence
sea
urchin
Sterechinus
neumayeri,
abundant
previous
records
early
1980s.
Antonie van Leeuwenhoek,
Journal Year:
2024,
Volume and Issue:
117(1)
Published: April 11, 2024
Dynamics
of
microbiomes
through
time
are
fundamental
regarding
survival
and
resilience
their
hosts
when
facing
environmental
alterations.
As
for
marine
species
with
commercial
applications,
such
as
sponges,
assessing
the
temporal
change
prokaryotic
communities
allows
us
to
better
consider
adaptation
sponges
aquaculture
designs.
The
present
study
aims
investigate
factors
shaping
microbiome
sponge
Dactylospongia
metachromia,
in
a
context
development
French
Polynesia,
Rangiroa,
Tuamotu
archipelago.
A
approach
targeting
explants
collected
during
farming
trials
revealed
relative
high
stability
diversity,
meanwhile
complementary
biogeographical
confirmed
spatial
specificity
amongst
samples
at
different
longitudinal
scales.
Results
from
this
additional
analysis
that
differences
might
first
be
explained
by
changes
(mainly
temperature
salinity),
while
no
significant
effect
host
phylogeny
was
observed.
core
community
D.
metachromia
is
thus
characterized
spatiotemporal
constancy,
which
good
prospect
sustainable
exploitation
towards
drug
development.
Indeed,
across
locations
throughout
process,
evidenced
our
results,
should
go
against
negative
influence
translocation
situ
aquaculture.