Ecological Indicators,
Journal Year:
2022,
Volume and Issue:
145, P. 109706 - 109706
Published: Nov. 25, 2022
Reef-building
corals
usually
form
a
symbiotic
relationship
with
various
photosynthetic
dinoflagellates,
which
may
determine
the
physiology
and
stress
tolerance
of
their
hosts.
The
mechanisms
governing
symbiont
dynamics
are
still
poorly
understood,
but
be
driven
by
temperature.
Therefore,
we
performed
indoor
experiments
to
examine
photochemical
efficiency
in
coral
Pocillopora
damicornis
thermo-sensitive
Cladocopium
(PdC)
or
thermo-tolerant
Durusdinium
(PdD)
under
6-day
temperature
after
90-day
post-stress
recovery.
Regardless
type,
damage
was
induced
both
heat
cold
stress.
We
observed
PdC
greater
photodamage
had
faster
increase
proportion
when
exposed
stress,
whereas
an
inverse
shuffling
PdD
recovery
period.
This
is
first
record
from
originally
dominant
adult
laboratory
conditions
degree
highly
correlated
photodamage.
Overall,
our
findings
suggest
that
can
act
as
critical
mechanism
allowing
rapidly
adjust
environmental
changes,
has
implications
for
capacity
prevail
oceans
fluctuations
future.
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: March 26, 2024
Introduction
The
Red
Sea
is
a
narrow
rift
basin
characterized
by
latitudinal
environmental
gradients
which
shape
the
diversity
and
distribution
of
reef-dwelling
organisms.
Studies
on
Symbiodiniaceae
associated
with
select
hard
coral
taxa
present
species-
specific
assemblages
concordant
variation
patterns
from
North
to
southeast
coast
at
depths
shallower
than
30
m.
At
mesophotic
depths,
however,
algal
studies
are
rare.
Here,
we
characterize
for
first-time
host-associated
communities
specialist
species,
Leptoseris
cf.
striatus
,
along
Saudi
Arabian
coast.
Methods
We
sampled
56
colonies
spanning
eastern
coastline
Northern
Farasan
Banks
in
South,
across
two
sampling
periods,
Fall
2020
Spring
2022.
used
Next
Generation
Sequencing
ITS2
marker
region
conjunction
SymPortal
denote
assemblages.
Results
discussion
Our
results
show
relatively
stable
species-specific
interaction
algae
genus
Cladocopium
examined
gradient,
appearance,
smaller
proportion,
presumed
thermally
tolerant
genera
Symbiodinium
Durusdinium
during
warmer
season
(Fall
2020).
Contrary
shallow
water
corals,
our
do
not
change
community
composition
South
this
species.
However,
study
highlights
first
time
that
symbiont
subject
over
depth,
could
represent
an
important
phenomenon
address
future
studies.
Frontiers in Marine Science,
Journal Year:
2021,
Volume and Issue:
8
Published: April 6, 2021
Terrestrial
runoff
can
negatively
impact
marine
ecosystems
through
stressors
including
excess
nutrients,
freshwater,
sediments,
and
contaminants.
Severe
storms,
which
are
increasing
with
global
climate
change,
generate
massive
inputs
of
over
short
timescales
(hours
to
days);
such
impacted
offshore
reefs
in
the
northwest
Gulf
Mexico
(NW
GoM)
following
severe
storms
2016
2017.
Several
weeks
after
coastal
flooding
from
these
events,
NW
GoM
reef
corals,
sponges,
other
benthic
invertebrates
∼185
km
experienced
mortality
(2016
only)
and/or
sub-lethal
stress
(both
years).
To
assess
storm-derived
on
filter
feeders,
we
characterized
bacterial
communities
two
Agelas
clathrodes
Xestospongia
muta
,
during
periods
no
a
three-year
period
(2016—2018).
Sponge-associated
seawater-associated
were
altered
both
flood
years.
Additionally,
found
evidence
wastewater
contamination
(based
16S
rRNA
gene
libraries
quantitative
PCR)
sponge
samples,
but
not
seawater
Signs
absent
no-flood
year.
We
show
that
events
have
capacity
reach
resident
organisms.
Such
impacts
most
readily
detected
if
baseline
data
organismal
physiology
associated
microbiome
composition
available.
This
highlights
need
for
molecular
microbial
time
series
organisms
near-
ecosystems,
continued
mitigation
stormwater
change
impacts.
