Land Degradation and Development,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
ABSTRACT
Iron
(Fe)
oxides
play
an
important
role
in
maintaining
soil
organic
carbon
(SOC)
stability.
However,
little
attention
has
been
paid
to
the
of
Fe
preserving
SOC
mangrove
wetlands
with
different
vegetation
communities.
In
this
study,
four
soils
dominant
communities:
Phragmites
australis
(PA),
Acanthus
ilicifolius
(AI),
Sonneratia
apetala
(SA),
and
mixed
S.
A.
(SA
+
AI)
were
selected
from
wetland
Qi'ao
Island.
The
distributions
Fe‐bound
(OC‐Fe)
(Fe
o
,
acid
oxalate‐extractable
Fe;
p
pyrophosphate‐extractable
Fe),
factors
conservation
investigated.
results
showed
that
OC‐Fe
content
ranged
1.03
4.96
g/kg,
a
contribution
ranging
5.97%
24.07%,
which
was
highest
SA
AI
(3.58
±
0.94
g/kg),
followed
by
PA
(2.67
1.07
(1.88
0.43
(1.82
0.32
g/kg).
higher
AI,
however,
lower.
Structural
equation
modeling
indicated
SOC,
direct
drivers
formation.
Overall,
aboveground
biomass
communities
indirectly
affected
regulating
inputs.
High
water
contents,
low
oxygen
conditions,
near‐neutral
favor
formation
between
co‐precipitation
or
complexation.
This
study
highlights
importance
Fe‐C
coupling,
while
providing
theoretical
support
for
cycling
processes
wetlands.
Land Degradation and Development,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
ABSTRACT
Iron
(Fe)
oxides
play
an
important
role
in
maintaining
soil
organic
carbon
(SOC)
stability.
However,
little
attention
has
been
paid
to
the
of
Fe
preserving
SOC
mangrove
wetlands
with
different
vegetation
communities.
In
this
study,
four
soils
dominant
communities:
Phragmites
australis
(PA),
Acanthus
ilicifolius
(AI),
Sonneratia
apetala
(SA),
and
mixed
S.
A.
(SA
+
AI)
were
selected
from
wetland
Qi'ao
Island.
The
distributions
Fe‐bound
(OC‐Fe)
(Fe
o
,
acid
oxalate‐extractable
Fe;
p
pyrophosphate‐extractable
Fe),
factors
conservation
investigated.
results
showed
that
OC‐Fe
content
ranged
1.03
4.96
g/kg,
a
contribution
ranging
5.97%
24.07%,
which
was
highest
SA
AI
(3.58
±
0.94
g/kg),
followed
by
PA
(2.67
1.07
(1.88
0.43
(1.82
0.32
g/kg).
higher
AI,
however,
lower.
Structural
equation
modeling
indicated
SOC,
direct
drivers
formation.
Overall,
aboveground
biomass
communities
indirectly
affected
regulating
inputs.
High
water
contents,
low
oxygen
conditions,
near‐neutral
favor
formation
between
co‐precipitation
or
complexation.
This
study
highlights
importance
Fe‐C
coupling,
while
providing
theoretical
support
for
cycling
processes
wetlands.
