Severe decline of Gongolaria Barbata (Fucales) along most of the French Mediterranean coast
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Фев. 17, 2025
In
the
Mediterranean
Sea,
seaweed
marine
forests,
one
of
most
important
benthic
assemblages
for
coastal
ecosystem
functioning,
are
shaping
rocky
reefs.
Among
Fucales,
Gongolaria
barbata
(syn.
Cystoseira
barbata)
is
a
several
years
living
species
usually
growing
in
very
shallow,
sheltered
and
well-lit
reef
habitats
lagoons.
The
long-term
change
its
distribution
relation
to
variety
disturbances
has
been
assessed
along
French
coast,
including
Corsica
brackish
lagoons,
thanks
historical
data
dating
back
19th
century.
current
was
established
through
an
extensive
survey
conducted
by
snorkelling,
encompassing
approximately
3
000
km
coastline.
A
GIS
analysis
indicates
that
can
currently
be
considered
as
regionally
extinct
Catalonia
Western
Provence
functionally
Riviera.
Languedoc,
open
sea
only
present
certain
lagoons
despite
severe
repeated
anoxic
crises
(malaïgues)
competition
with
rich
exotic
flora
introduced
from
NE
Atlantic
NW
Pacific,
especially
invasive
Sargassum
muticum.
contrast,
populations
G.
have
remained
stable
Eastern
Corsica.
main
possible
causes
decline
uprooting,
overgrazing
herbivores,
habitat
destruction
seaweeds.
relevance
ecological
restoration
assessed.
Язык: Английский
A decision-support framework for the restoration of Cystoseira sensu lato forests
Frontiers in Marine Science,
Год журнала:
2023,
Номер
10
Опубликована: Авг. 24, 2023
Macroalgal
forests
characterised
by
species
of
the
genus
Cystoseira
sensu
lato
form
important
shallow
coastal
rocky
habitats
in
Mediterranean
Sea.
These
support
a
high
biodiversity
and
provide
ecosystem
services
societal
benefits.
Currently
these
are
often
poor
condition
many
areas,
due
to
loss
degradation
from
both
anthropogenic
climate
stressors.
Restoration
has
recently
moved
forefront
United
Nations
European
Union
agendas
reverse
this
trend,
particularly
last
decade
with
implementation
various
international
policies.
However,
been
generic
targets
(e.g.,
restoration
30%
degraded
2030)
not
linked
specifically
what
habitat
or
restore,
where
how.
Initial
have
missed,
new
expected
through
proposed
EU
Nature
Law,
but
overall
guidance
is
still
lacking.
There
few
specific
guides
marine
limited
mostly
seagrass,
corals
shellfish.
As
priority
action
for
recovery
ecosystems
decision-support
framework
developed
macroalgal
forests,
comprising
stepwise
decision
tree
additional
descriptions
key
elements
be
considered
action.
The
includes
steps
concerning
current
historical
forest
presence,
site
local
assessment
choice
actions.
Key
considerations
include
(competence,
society
support,
finance
governance),
success
evaluation
(at
target
level)
long-term
management.
builds
on
existing
work
s.l.
restoration,
carried
out
AFRIMED
project,
also
principles
guidelines
place
habitats.
reported
here
involved
expertise
scientists
information
stakeholders.
Gaps
were
identified
recommendations
made,
dealing
stressors,
coordinating
networking
stakeholders,
integrating
top
down
policy
bottom
up
initiatives,
funding
actions,
establishing
synergies
between
conservation
spatial
planning
finally
communication
publicity.
Язык: Английский
Local and global stressors as major drivers of the drastic regression of brown macroalgae forests in an oceanic island
Regional Environmental Change,
Год журнала:
2024,
Номер
24(2)
Опубликована: Апрель 15, 2024
Abstract
Similar
to
other
coastal
regions
worldwide,
forests
created
by
brown
macroalgae
have
severely
declined
in
recent
decades
across
the
Macaronesian
oceanic
archipelagos
(northeastern
Atlantic),
eroding
provision
of
ecosystem
services.
However,
putative
effects
natural
and
anthropogenic
stressors
(both
local
global)
on
such
declines
spatial
temporal
scales
remain
unresolved.
Our
research
endeavored
investigate
connection
between
global
distribution
extent
Gongolaria
abies-marina
rocky
intertidal
adjacent
subtidal
zones
Gran
Canaria
over
past
four
decades.
We
also
quantified
presence
populations
at
small
scales,
according
micro-habitat
topography
(“open
rock”
versus
“refuge”).
Through
herbarium
records,
we
additionally
analyzed
historical
variation
thallus
size
species.
Finally,
experimentally
assessed
thermotolerance
embryonic
stages
warming.
The
main
environmental
drivers
explaining
regression
G.
were
increasing
number
marine
heatwaves,
while
human
impacts
(quantified
through
HAPI
index)
accounted
for
further
forests.
Warming
reduced
survival
macroalgal
embryos.
A
progressive
miniaturization
species,
currently
restricted
refuges
as
a
strategy,
seems
likely
be
final
stage
disappearance
this
from
island’s
shores.
Язык: Английский
Keep It Simple: Improving the Ex Situ Culture of Cystoseira s.l. to Restore Macroalgal Forests
Plants,
Год журнала:
2023,
Номер
12(14), С. 2615 - 2615
Опубликована: Июль 11, 2023
Brown
algae
from
genus
Cystoseira
s.l.
form
dense
underwater
forests
that
represent
the
most
productive
areas
in
Mediterranean
Sea.
Due
to
combined
effects
of
global
and
local
stressors
such
as
climate
change,
urbanization,
herbivore
outbreaks,
there
has
been
a
severe
decline
brown
algal
Natural
recovery
depleted
sites
is
unlikely
due
low
dispersal
capacity
these
species,
efficient
techniques
restore
habitats
are
needed.
In
this
context,
aims
our
study
were
(1)
improve
simplify
current
ex
situ
laboratory
protocol
for
cultivation
Gongolaria
barbata
by
testing
feasibility
some
cost-effective
time-efficient
on
two
donor
G.
(2)
evaluate
survival
growth
young
thalli
during
phase
critical
five
months
after
out-planting.
Specifically,
following
methods
tested:
(A)
clay
tiles
mesocosms
with
culture
water
prepared
three
different
procedures
(a)
filtered
seawater
0.22
μm
filter
membrane,
(b)
0.7
membrane
(GF),
(c)
UV-sterilized
water,
(B)
open
systems.
After
weeks,
all
fixed
plastic
lantern
net
baskets
suspended
at
depth
2
m
coastal
sea
(hybrid
method),
success
was
monitored
relation
protocol.
The
satisfactory
results
indicate
suitable
mesocosm,
which
significantly
reduces
cost
phase.
This
opens
possibility
numerous
frequent
cultures
reproductive
period
species.
Additionally,
if
remain
an
extended
several
months,
they
can
grow
marine
environment
without
being
exposed
pressure
herbivorous
fish.
Язык: Английский
Can thermal anomalies impair the restoration of Cystoseira s.l. forests?
Marine Environmental Research,
Год журнала:
2024,
Номер
198, С. 106537 - 106537
Опубликована: Май 1, 2024
Marine
macroalgal
forests
are
facing
unprecedented
challenges
worldwide
due
to
the
accelerating
impacts
of
climate
change.
These
ecosystems
play
a
crucial
role
in
supporting
biodiversity,
coastal
ecosystem
functions
and
services,
indeed
object
several
conservation
restoration
measures.
The
Mediterranean
Sea
is
warming
faster
than
oceans
thermal
anomalies
occurring
with
increasing
intensity,
frequency
duration.
Along
coasts,
Cystoseira
sensu
lato
species
main
representatives
their
decline
has
been
widely
documented.
Some
relevant
achievements
implementation
ecological
have
obtained,
but
rising
temperatures
occurrence
increasingly
threaten
success
these
attempts.
In
summer
2022,
ex-situ
actions
Ericaria
amentacea
were
carried
out
by
collecting
fertile
material
from
three
donor
sites
Italian
coasts
along
latitudinal
gradient,
during
period
sexual
maturity
(June/July).
Noteworthy
anomalous
conditions
recorded
at
sites,
sea
surface
exceeding
climatological
mean
up
4.3°C
heatwaves
lasting
78
days.
Our
results
suggest
that
may
affected
culture
embryos
both
pre-
post-zygotic
phases,
resulting
significantly
low
efficiency
sites.
reproductive
structures
showed
some
abnormalities,
fertilization
eggs
was
lower
embryo
growth
slower,
percent
cover
seedlings
on
tiles
survival
rate.
observations
underscore
vulnerability
algal
global
change
highlight
additional
for
severity
anomalies,
emphasizing
need
adaptive
strategies
comprehensive
understanding
changing
climate.
forest
requires
long
projects,
allow
long-term
monitoring
better
biology
mitigating
stochastic
events
can
cause
temporary
failure
efforts.
Язык: Английский
Functional ecological traits in young and adult thalli of canopy-forming brown macroalga Gongolaria barbata (Phaeophyta) from a transitional water system
PeerJ,
Год журнала:
2024,
Номер
12, С. e17959 - e17959
Опубликована: Сен. 12, 2024
is
a
canopy-forming
brown
macroalga
that
thrives
in
the
intertidal
and
subtidal
habitats
of
warm-temperate
Mediterranean
Sea,
which
particularly
exposed
to
environmental
changes
due
its
peculiar
geographical
location
exposure
both
global
local
stressors.
Testing
whether
this
species
featured
by
specific
functional,
eco-physiological
biochemical
traits
allowing
an
efficient
use
habitat
resources
adaptation
stress,
potential
might
change
with
population
growth,
essential
for
predicting
performance
algae
under
different
abiotic
variables
(
Язык: Английский
Combining passive and active restoration to rehabilitate a historically polluted marine site
Frontiers in Marine Science,
Год журнала:
2023,
Номер
10
Опубликована: Авг. 21, 2023
Introduction
Passive
and
active
restoration
approaches
have
been
often
considered
as
different
alternatives
to
achieve
the
ecological
of
a
degraded
site.
This
false
dichotomy
has
overcome
in
terrestrial
ecosystems,
for
which
range
applied
within
same
project,
creating
continuum
interventions.
In
marine
environment,
combined
approach
based
on
passive
is
less
studied.
Methods
Here,
we
tested
possibility
actively
restoring
macroalgal
population
historically
polluted
industrial
site,
subjected
decadal
(i.e.,
unassisted,
or
spontaneous
recovery
following
cessation
activity),
Mediterranean
Sea.
Recently,
it
demonstrated
that
site
under
scrutiny,
there
no
longer
any
sign
historical
contamination
impact
benthic
fauna
therefore
environmental
conditions
are
indistinguishable
from
surrounding
non-impacted
areas.
We
used
artificial
breakwater
barriers
already
present
restore
brown
algae
Gongolaria
barbata
.
The
intervention
was
conducted
by
applying
an
situ
recruitment
complementary
action
using
cages
exclude
herbivores.
G.
recruits
were
transplanted
reefs
after
they
reached
maximum
growth
inside
cages,
one
cage
opened
another
completely
removed
also
test
grazing
pressure.
associated
assemblages
analysed
terms
meio-
macrofaunal
abundance,
richness
taxa,
taxonomic
composition.
Results
discussion
Our
results
indicate
that,
at
least
over
relatively
short
period
6
months),
use
represents
useful
tool
let
macroalgae
grow
enough
counterbalance
herbivory
below
characterized
composition
when
compared
controls
without
macroalgae),
particularly
rare
taxa.
conclusion,
combination
can
be
sites
activities.
Язык: Английский
Assessment of the growth capacity of newly sprouted shoots of Gelidium corneum (Florideophyceae, Rhodophyta) through field-based experiments
Marine Environmental Research,
Год журнала:
2024,
Номер
202, С. 106781 - 106781
Опубликована: Окт. 11, 2024
Язык: Английский
Assessing climatic conditions and biotic interactions shaping the success of Cystoseira foeniculacea early‐life stages
Journal of Phycology,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 23, 2024
Abstract
Early‐life
stages
of
canopy‐forming
macroalgae
are
critical
for
the
maintenance
natural
populations
and
success
restoration
actions.
Unfortunately,
abiotic
conditions
biotic
interactions
shaping
these
have
received
less
attention
than
adults.
Here,
we
combined
field
mesocosm
experiments
to
explore
effects
temperature,
herbivory,
canopy
presence
on
development
early‐life
brown
seaweed
Cystoseira
foeniculacea
.
We
assessed
by
examining
changes
in
recruit
density
size.
After
recruiting
zygotes
under
laboratory
conditions,
conducted
one
three
experiments.
In
first
experiment,
recruits
decreased
over
time
all
rockpools
was
negatively
affected
rising
temperatures
turf
cover.
Additionally,
a
marine
heatwave
(MHW;
11
days
>25°C)
recorded
donor
pools,
producing
strong
decay
transplanted
significant
reduction
mature
canopy.
The
second
experiment
tested
survival
based
their
positioning
within
observed
higher
when
placed
at
edge
or
outside
compared
third
an
herbivory‐exclusion
show
how
48
h
noncaged
treatments.
laboratory,
thermotolerance
controlled
exposing
19,
22,
25,
28,
31°C
7
weeks
assess
thermal
impacts
growth.
Temperatures
above
25°C
threshold
reduced
size
recruits.
This
study
sheds
light
performance
spp.
Macaronesia,
showing
low
ratio
against
current
pressures
even
context
potential
refuge
provided
intertidal
rockpools.
Язык: Английский