Discover Environment,
Год журнала:
2023,
Номер
1(1)
Опубликована: Ноя. 23, 2023
Abstract
Pink
pigmentation
on
massive
corals
is
quite
commonly
observed
in
the
global
reefs,
but
its
function
surface
area
of
less
understood.
In
present
study,
coral
video
transect
method
was
employed
to
document
incidence
pink
Porites
colonies
from
21
islands
under
Gulf
Mannar
Marine
Biosphere
Reserve
(GoMMBR),
India.
Results
revealed
that
19%
(n
=
77
out
517)
sp.
displayed
as
a
stress
indicator
response
colonization
epibionts.
exhibited
when
infected
with
epibionts
like
vermetid
snail,
Ceraesignum
(12%;
n
49),
rhodolith,
Hydrolithon
(5%;
21),
or
both
(2%;
7).
This
study
indicates
pigment
deposition
aids
minimizing
tissue
damage
by
preventing
further
progression
infesting
agents
such
vermitid
snails
and
rhodoliths
areas
corals.
Communications Earth & Environment,
Год журнала:
2025,
Номер
6(1)
Опубликована: Янв. 7, 2025
Abstract
Flocculation
of
sediments
is
crucial
for
morphodynamics,
biogeochemical
cycles,
and
ecological
processes
in
aquatic
environments.
Here
we
present
field
evidence
that
bio-cohesion
primarily
drives
the
flocculation
suspended
on
a
coastal
algal
reef.
Results
from
concurrent
measurements
sediment
mass
volume
concentrations,
along
with
Reynolds
stress,
reveal
unexpected
trends,
data
deviate
classic
Rouse
formula
when
non-cohesive
assumed.
Direct
estimates
particle
effective
density
show
dependence
mean
diameter,
fractal
dimension
2.18.
The
reduced
(or
settling
velocity)
low
are
typical
flocs
containing
lower-density
saltwater
organic
materials.
Additionally,
content
negatively
correlates
positively
confirming
observed
flocculation.
These
results
provide
quantitative
matter
promotes
macrofloc
formation
floc
size
growth
reef
environment.
Coral Reefs,
Год журнала:
2024,
Номер
43(4), С. 881 - 897
Опубликована: Июнь 2, 2024
Abstract
Hydrodynamic
processes
are
a
major
driver
for
marine
systems,
linking
organisms
with
their
environment.
However,
lack
of
hydrodynamic
data
at
an
ecologically
relevant
spatial
resolution
has
stymied
our
understanding
reef
function,
as
exemplified
by
Lizard
Island
on
the
Great
Barrier
Reef.
To
address
this
gap,
23
to
27
Marotte
HS
current
meters
were
deployed
over
three
periods,
collecting
15
months
velocity
data.
Combining
these
wind
and
tide
datasets,
we
provide
preliminary
description
circulation
in
lagoon,
examining
influence,
flushing
time.
During
south-easterly
trade
winds,
flood
tides
flow
through
Lagoon
Entrance,
while
wind-induced
waves
cross
Bird-South
crest,
driving
north-westerly
Loomis
Channel
across
western
lagoon.
Ebb
east–south-east
Entrance
south-west
Palfrey-South
channel.
Tides
contribute
mean
20.4%
overall
speed,
particularly
deeper
sites
less
interference,
shallow
more
influenced
wind.
lagoon
times
ranged
from
few
hours
10
days;
longer
during
periods
low
speeds.
Hindcast
2016
coral
bleaching
event
(following
8
Degree
Heating
Weeks)
approximately
22
h,
suggesting
that
time
likely
had
minimal
influence
bleaching.
Our
analyses
initial
insights
into
system
aid
potential
relationships
between
physical
environment,
bridging
gap
ecology
hydrodynamics.
Limnology and Oceanography,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 19, 2025
Abstract
Seagrasses
thrive
in
shallow
lagoons
between
land
and
fringing
coral
reefs,
serving
as
a
buffer
that
mitigates
the
propagation
of
environmental
stressors
from
to
reefs.
However,
mass
grazing
by
megaherbivores
poses
significant
threat
seagrass
loss,
impacting
sustainability
tropical
coastal
habitats.
Despite
urgency
this
issue,
few
studies
have
investigated
possible
consequences
on
mitigating
functions
beds.
To
explore
roles
beds
sediment
accumulation
stabilization
assess
effects
herbivory
these
functions,
we
conducted
trap
experiments
reef
lagoon
examine
impact
seagrasses
mobility.
Hydrodynamic
forces
governing
mobility
were
quantified
using
customized
reef‐scale
hydrodynamic
model.
The
results
indicated
resuspension
primarily
driven
bottom
shear
stress
was
primary
factor
influencing
within
lagoon.
Resuspension
healthy
generally
low
exhibited
minimal
sensitivity
forcing.
Consequently,
river‐borne
mineral
soil
particles
predominantly
remained
confined
nearshore
zone
due
trapping
stabilizing
seagrasses.
Since
2019,
been
severely
depleted
intensive
sea
turtles.
Simultaneously,
has
intensified,
its
dependence
become
evident.
Our
findings
demonstrate
can
effectively
suppress
capturing
soil.
Furthermore,
loss
function
through
could
potentially
lead
destabilization
erosion.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 15, 2024
Abstract
Human
impacts
are
dramatically
changing
ecological
communities,
motivating
research
on
resilience.
Tropical
reefs
increasingly
undergoing
transitions
to
short
algal
turf,
a
successional
community
that
mediates
either
recovery
coral
by
allowing
recruitment
or
longer
turf/macroalgae.
Intense
herbivory
limits
turf
height;
subsequently,
overfishing
erodes
resilience
of
the
desirable
coral-dominated
reef
state.
Increased
sedimentation
also
through
smothering
and
suppression.
In
spite
this
critical
role,
most
studies
tropical
focus
fishes,
contribution
urchins
remains
under-studied.
To
test
how
different
scenarios
impact
resilience,
we
experimentally
simulated,
in
situ,
four
future
derived
from
patterns
fish
urchin
loss
other
systems
two
regimes.
We
found
were
maintaining
state
even
with
reduced
increased
sediment.
Further,
cleared
sediment,
facilitating
herbivory.
This
study
articulates
likelihood
reliance
impacted
Anthropocene.
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 12, 2024
Abstract
Coral
reef
sediment
research
focused
on
quantifying
production
sources,
suspended
sediment,
and
trapping
or
accumulation
rates,
overlooking
the
role
of
hydrodynamics
morphology
in
determining
these.
We
used
an
interdisciplinary
approach,
focusing
links
between
physical
features
processes
hypothesized
how
they
affect
recovery.
Typhoon
Bopha
hit
Ngederrak
Reef
(Palau)
2012,
significantly
reducing
coral
cover.
The
is
characterized
by
spur
grooves
(SAGs)
bordered
two
tidal
channels,
but
SAGs
are
not
present
its
northernmost
part,
near
one
these
channels.
has
recovered
SAG
area,
recovery
was
slower
north.
Flow
measurements
samples
taken
non-SAG
areas
were
to
calculate
threshold
for
movement
due
mean
flows
wave
orbital
velocities.
Sediment
mainly
waves,
direction
net
transport
determined
flow.
flow
reached
80–100%
time
spurs,
it
60%
33%
times
during
flooding
ebbing
tides
respectively.
This
asymmetry
suggests
that
removed
from
spurs
transported
seaward
be
stored
at
depth.
steeper
slope
(8%)
relative
area
(4%),
favors
rubble
stabilization.
information
can
help
predict
localized
impacts
as
well
describing
widely
distributed
promoting
