Environmental Research Letters,
Год журнала:
2024,
Номер
19(9), С. 094036 - 094036
Опубликована: Авг. 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,
Год журнала:
2024,
Номер
30(9)
Опубликована: Сен. 1, 2024
Coastal-wetlands
play
a
crucial
role
as
carbon
(C)
reservoirs
on
Earth
due
to
their
C
pool
composition
and
functional
sink,
making
them
significant
for
mitigating
global
climate
change.
However,
the
development
utilization
of
wetland
resources,
many
wetlands
have
been
transformed
into
other
land-use
types.
The
current
study
focuses
alterations
in
soil
organic-C
(SOC)
coastal-wetlands
following
reclamation
aquaculture
ponds.
We
conducted
sampling
at
11
different
along
tropical
temperate
regions
China
coast.
Each
site
included
two
community
types,
one
with
solely
native
species
(Suaeda
salsa,
Phragmites
australis
Mangroves)
an
adjacent
reclaimed
pond.
Across
these
locations
we
compared
SOC
stock,
active
OC
fractions,
physicochemical
properties
between
coastal
observed
that
uses,
sites,
interaction
had
effects
its
stock
(p
<
.05).
Reclamation
significantly
declined
concentration
depths
0-15
cm
15-30
by
35.5%
30.3%,
respectively,
also
decreased
29.1%
37.9%,
respectively.
Similar
trends
were
evident
labile
organic-C,
dissolved
microbial
biomass
concentrations
.05),
indicating
C-destabilization
losses
from
conversion.
Soils
ponds
exhibited
higher
bulk
density
(BD;
11.3%)
lower
levels
salinity
(61.0%),
water
content
(SWC;
11.7%),
total
nitrogen
(TN)
(23.8%)
available-nitrogen
(37.7%;
p
.05)
than
coastal-wetlands.
Redundancy-analysis
revealed
pH,
BD
TN
key
variables
most
linked
temporal
variations
fractions
land
use
This
provides
theoretical
basis
rational
management
achievement
environment-friendly
society,
preservation
multiple
service
functions
within
ecosystems.
