Desalination
has
exponentially
increased
in
the
Mediterranean
basin
due
to
water
scarcity.
Transplantation
experiments
were
performed
with
endemic
seagrass
P.
oceanica
following
a
brine
dilution
plume
desalination
plant
Spain.
placed
at
3
locations:
control
(~37
psu),
intermediate
influence
(IB,
~39.5
psu)
and
high
(HB,
~42
psu).
Reactive
oxygen
species
endpoints
(i.e.
H2O2,
lipid
peroxidation,
ascorbate)
regulation
of
genes
involved
antioxidant
osmoregulation
analysed
1,
6
days.
H2O2
TBARS
IB
HB,
ASC
decreased
indicating
ROS
excess,
peroxidation
consumption.
Genes
related
(SOS1,
SOS3,
AKT2/3)
response
(GR,
APX,
FeSOD,
MnSOD,
STRK1)
upregulated
brine-exposed
plants,
especially
early
experiment
stages,
later
evidence
drop
although
still
within
positive
levels
expression.
The
results
showed
that
recorded
oxidative
stress
osmoregulatory
responses
caused
by
brines
interacting
other
environmental
pressures
natural
and/or
anthropogenic).
approach
delivered
battery
biomarkers
can
be
also
globally
applied
using
relevant
macrophytes
seagrasses,
macroalgae)
for
monitoring
programs
(EMPs),
address
stressors
their
isolated/combined
contribution
marine
pollution.
The Science of The Total Environment,
Journal Year:
2023,
Volume and Issue:
883, P. 163538 - 163538
Published: April 24, 2023
Seagrasses,
which
are
considered
among
the
most
ecologically
valuable
and
endangered
coastal
ecosystems,
have
a
narrowly
limited
distribution
in
south-east
Pacific,
where
Zostera
chilensis
is
only
remaining
relict.
Due
to
water
scarcity,
desalination
industry
has
grown
last
decades
central-north
coasts
of
Chile,
may
be
relevant
address
terms
potential
impacts
on
benthic
communities
due
their
associated
high-salinity
brine
discharges
subtidal
ecosystems.
In
this
work,
we
assessed
ecophysiological
cellular
responses
desalination-extrapolable
hypersalinity
conditions
Z.
chilensis.
Mesocosms
experiments
were
performed
for
10
days,
plants
exposed
3
different
salinity
treatments:
34
psu
(control),
37
40
psu.
Photosynthetic
performance,
H2O2
accumulation,
ascorbate
content
(reduced
oxidized)
measured,
as
well
relative
gene
expression
enzymes
related
osmotic
regulation
oxidative
stress;
these,
at
1,
3,
6
days.
showed
decrease
photosynthetic
parameters
such
electron
transport
rate
(ETRmax)
saturation
irradiance
(EkETR)
under
treatments,
while
non-photochemical
quenching
(NPQmax)
presented
an
initial
increment
subsequent
decline
levels
increased
with
hypersalinity,
dehydroascorbate
psu,
although
decreased
along
experimental
period.
Increased
salinities
also
triggered
genes
ion
osmolyte
syntheses,
but
salinity-dependent
up-regulated
mostly
those
reactive
oxygen
species
metabolism.
The
relict
seagrass
shown
withstand
that
extrapolable
effects
short-term.
As
latter
not
fully
clear
long-term,
considering
restricted
ecological
importance,
direct
meadows
recommended.
Frontiers in Marine Science,
Journal Year:
2024,
Volume and Issue:
11
Published: June 3, 2024
In
Chile,
there
is
an
increasing
demand
for
freshwater
supply
human
consumption,
agriculture,
and
industrial
activities.
this
sense,
the
country
highly
threatened
by
climate
change,
which
drastically
affecting
availability
of
water
resources
in
north-central
region
due
to
desertification
processes.
Therefore,
seawater
reverse
osmosis
(SWRO)
desalination
becoming
one
most
feasible
alternatives
address
current
future
challenges
regarding
scarcity
country.
This
investigation
aims
evaluate
potential
locations
a
sustainable
cost-effective
installation
projects;
latter,
under
multi-criteria
geographic
information
system
(GIS)-model.
The
model
was
tested
scarcity-threatened
Valparaiso
Region,
as
case
study.
developed
integrating
economic
socio-environmental
criteria
involved
development
and/or
construction
projects.
results
analysis
show
that
Valparaıso
Region
presents
optimal
areas
developing
SWRO
Both
northern
central
appropriate
installing
plants
their
distribution
lines,
ensuring
short-
long-term
supply,
especially
agriculture
population
consumption.
obtained
study
could
be
extrapolated
tool
assess
projects
other
world
regions
make
more
viable
addressing
global
demands.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Feb. 3, 2023
Desalination
brines
from
direct
seawater
intake
that
get
discharged
to
coastal
areas
may
produce
stress
responses
on
benthic
marine
communities,
mostly
due
its
excess
salinity,
and
especially
sessile
organisms;
in
this
context,
macroalgae
have
been
understudied
desalination
ecotoxicological
investigations.
In
study,
we
assessed
the
short-
long-term
cellular
tolerance
two
brown
species
of
genus
Dictyota
through
controlled
laboratory
conditions.
kunthii
was
collected
eastern
Pacific
Ocean
(average
~34
psu),
whereas
dichotoma
Mediterranean
Sea
~37
psu).
Each
exposed
for
up
7
days
conditions
with
increased
salinity
values:
+2
+7
psu
above
their
natural
average
salinity.
Photosynthetic
parameters
oxidative
measurements
were
determined.
The
results
showed
that,
both
species,
high
values
induced
reduced
photoinhibition
(
F
v
/F
m
)
but
primary
productivity
(ETR
max
light
requirement
(Ek
ETR
after
days.
Conversely,
photosynthetic
efficiency
(α
decreased
hypersalinity
treatments
D.
,
while
there
no
changes
.
reactive
oxygen
hydrogen
peroxide
(H
2
O
greater
at
3
lipid
peroxidation
decreases
under
time
species.
Despite
evident
H
accumulation
against
hypersalinity,
it
did
not
damage
important
impairment
apparatus.
These
contribute
understanding
strategies
level
spp.,
which
be
considered
as
potential
candidates
biomonitoring
impacts
field.
