Environmental Research Letters,
Journal Year:
2024,
Volume and Issue:
19(9), P. 094036 - 094036
Published: Aug. 1, 2024
Abstract
Seagrass
meadows
store
significant
amounts
of
carbonate
(CaCO
3
)
in
sediment,
contributing
to
coastal
protection
but
potentially
offsetting
their
effectiveness
as
carbon
sinks.
Understanding
the
accumulation
CaCO
and
its
balance
with
organic
(C
org
seagrass
ecosystems
is
crucial
for
developing
seagrass-based
blue
strategies
climate
change
mitigation.
However,
varies
significantly
across
geographic
regions,
notable
data
gaps
Caribbean
Central
America.
Here,
we
sampled
10
an
extensive
island
chain
The
Bahamas,
part
largest
ecosystem
one
banks
globally,
evaluate
stock,
rate,
C
sequestration.
Bahamas
6405–8847
Tg
inorganic
inorg
upper
meter
annual
rate
38.3–52.9
,
highlighting
these
hotspots
burial.
contributes
67
±
8%
(mean
standard
error)
sediment
accumulation,
indicating
important
role
seabed
elevation.
Sediment
showed
no
relationship
average
:
ratio
0.069
0.002,
∼
times
lower
than
threshold
about
0.63)
at
which
transition
from
CO
2
sources
available
air–sea
gas
flux
measurement
was
only
1/5
calculated
emission
expected
calcification,
suggesting
that
accumulated
supported
by
allochthonous
inputs.
Furthermore,
perceivable
between
density
either
stock
or
observed,
may
play
a
limited
supporting
production.
Further
studies
on
water
chemistry,
calcification
flux,
comparison
unvegetated
habitats
are
required
elucidate
budget
this
globally
ecosystem.
Global Change Biology,
Journal Year:
2025,
Volume and Issue:
31(1)
Published: Jan. 1, 2025
ABSTRACT
Coastal
wetlands
contain
very
large
carbon
(C)
stocks—termed
as
blue
C—and
their
management
has
emerged
a
promising
nature‐based
solution
for
climate
adaptation
and
mitigation.
The
interactions
among
sources,
pools,
molecular
compositions
of
soil
organic
C
(SOC)
within
ecosystems
(BCEs)
remain
elusive.
Here,
we
explore
these
along
an
18,000
km
long
coastal
line
salt
marshes,
mangroves,
seagrasses
in
China.
We
found
that
mineral‐associated
(MAOC)
is
enriched
BCEs
dominated
by
allochthonous
inputs
abundant
active
minerals,
leading
to
increased
proportion
persistent
molecules.
Specifically,
soils
with
(>
50%)
are
characterized
substantial
contribution
MAOC
70%)
total
SOC
notable
preservation
lipids
(36%)
across
seagrasses.
burial
particles,
derived
from
external
sources
such
rivers
or
tidal
influxes,
facilitates
the
formation
stable
through
binding
mineral
surfaces
occlusion
microaggregates.
proportions
particulate
(POC)
important
predictors
matter.
Lipid
composition
decrease
POC
autochthonous
increase.
These
findings
provide
new
insights
into
coupled
control
over
sequestration
BCEs,
emphasizing
role
inputs,
components.
Critical Reviews in Environmental Science and Technology,
Journal Year:
2024,
Volume and Issue:
54(19), P. 1395 - 1416
Published: Feb. 22, 2024
In
approximately
one
decade,
global
temperatures
will
likely
exceed
a
warming
level
that
United
Nations
Intergovernmental
Panel
on
Climate
Change
report
considers
"red
alert
for
humanity".
We
propose
exploring
tidal
flat
diatoms
to
address
climate
change
challenges.
Tidal
flats
are
extensive
coastal
ecosystems
crucial
the
provisioning
and
regulation
of
aquatic
environments.
Diatoms
contribute
biomass
production
account
20%
primary
productivity
40%
annual
marine
production,
making
them
nutrient
cycling
sediment
stabilization.
Potential
CO2
removal
from
Korean
by
is
estimated
be
598,457–683,171
t
equivalents
(CO2e)
annually,
with
economic
value
blue
carbon
(BC)
resulting
diatom
activity
being
US$
17.95–20.50
million.
Dissemination
this
potential
could
incentivize
wetland
protection
mitigation
measures.
The
CO2e
40,957,346–46,754,961
CO2e,
representing
0.11–0.13%
greenhouse
gas
emissions,
even
though
cover
0.0025%
Earth's
surface
represent
less
than
0.5%
(by
weight)
all
photosynthetic
plants.
Researchers
should
combine
ecology
economics
develop
standardized
approaches
input
monitoring
quantification.
Further,
spatiotemporal
analyses
environmental
threats
necessary
conserving
their
biodiversity
function
as
critical
BC
source.
Land-based
cultivation
large-scale
biorefinery
processes
can
greener,
more
prosperous
future
humanity
upon
which
we
rely.
Global Change Biology,
Journal Year:
2023,
Volume and Issue:
30(1)
Published: Dec. 9, 2023
Abstract
Tidal
wetlands
sequester
vast
amounts
of
organic
carbon
(OC)
and
enhance
soil
accretion.
The
conservation
restoration
these
ecosystems
is
becoming
increasingly
geared
toward
“blue”
sequestration
while
obtaining
additional
benefits,
such
as
buffering
sea‐level
rise
enhancing
biodiversity.
However,
the
assessments
blue
focus
primarily
on
bulk
SOC
inventories
often
neglect
OC
fractions
their
drivers;
this
limits
our
understanding
mechanisms
controlling
storage
opportunities
to
sinks.
Here,
we
determined
mineral‐associated
particulate
matter
(MAOM
POM,
respectively)
in
99
surface
soils
40
cores
collected
from
Chinese
mangrove
saltmarsh
habitats
across
a
broad
range
climates
accretion
rates
showed
how
previously
unrecognized
climate
mineral
regulated
MAOM
POM
accumulation
tidal
wetlands.
concentrations
(8.0
±
5.7
g
C
kg
−1
)
(±standard
deviation)
were
significantly
higher
than
(4.2
different
depths
habitats.
contributed
over
51.6
24.9%
78.9
19.0%
soils,
respectively;
both
exhibited
lower
autochthonous
contributions
but
terrestrial
or
marine
sources
which
was
derived
sources.
Increased
input
plant‐derived
along
increased
temperature
precipitation
gradients
enriched
concentrations.
In
contrast,
depended
climate,
controlled
reactivity
mineral–OC
interactions,
regional
sedimentary
processes
that
could
redistribute
reactive
minerals.
Mineral
diluted
potentially
enhanced
depending
composition
whether
benefited
plant
productivity.
Therefore,
management
strategies
should
comprehensively
consider
regulating
sediment
supply
abundance
with
engineering
solutions
tap
sink
potential
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
58(1), P. 468 - 479
Published: Dec. 23, 2023
Coastal
wetlands
contribute
to
the
mitigation
of
climate
change
through
sequestration
"blue
carbon".
Microbial
necromass,
lignin,
and
glycoproteins
(i.e.,
glomalin-related
soil
proteins
(GRSP)),
as
important
components
organic
carbon
(SOC),
are
sensitive
environmental
change.
However,
their
contributions
blue
formation
underlying
factors
remain
largely
unresolved.
To
address
this
paucity
knowledge,
we
investigated
along
a
salinity
gradient
in
coastal
marshes.
Our
results
revealed
decreasing
microbial
necromass
lignin
increased,
while
GRSP
showed
an
opposite
trend.
Using
random
forest
models,
that
SOC
were
dependent
on
biomass
resource
stoichiometry.
In
N-limited
saline
soils,
decreased
due
increased
N-acquisition
enzyme
activity.
Decreases
linked
reduced
mineral
protection
offered
by
short-range-ordered
Fe
(FeSRO).
Partial
least-squares
path
modeling
(PLS-PM)
further
indicated
could
increase
enhancing
protection.
findings
have
implications
for
improving
accumulation
refractory
mineral-bound
matter
wetlands,
considering
current
scenario
heightened
nutrient
discharge
sea-level
rise.
Abstract
Seagrass
meadows
are
important
sinks
for
organic
carbon
and
provide
co-benefits.
However,
data
on
the
stock
in
seagrass
sediments
scarce
many
regions,
particularly
The
Bahamas,
which
accounts
up
to
40.7%
of
documented
global
area,
limiting
formulation
blue
strategies.
Here,
we
sampled
10
across
an
extensive
island
chain
Bahamas.
We
estimate
that
Bahamas
store
0.42–0.59
Pg
top-meter
with
accumulation
rate
2.1–2.9
Tg
annually,
representing
a
substantial
hotspot.
Autochthonous
decreased
from
~1980
onwards,
concomitant
increases
cyanobacterial
mangrove
contributions,
suggesting
disturbance
ecosystems,
likely
caused
by
tourism
maritime
traffic
activities.
This
study
provides
vast,
understudied
region
contributes
improving
climate
action
Greater
Caribbean
region.
