The Science of The Total Environment,
Journal Year:
2025,
Volume and Issue:
959, P. 178324 - 178324
Published: Jan. 1, 2025
Seagrass
meadows
are
vital
blue
carbon
habitats,
with
sedimentary
organic
(OC)
originating
from
both
the
seagrass
itself
and
external
sources.
In
this
study,
lipid
biomarkers
(n-alkanes),
a
well-known
proxy
for
tracing
OC
sources,
were
used
to
indicate
presence
in
sediment
records
correlate
cold-temperate
(Zostera
marina)
sediments.
We
calculated
Zostera-ratio
(seagrass/algae
terrestrial
plants-ratio)
using
identified
biomass
n-alkanes
(C
Limnology and Oceanography,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 22, 2024
Abstract
Biogenic
silica
(biogenic
Si)
is
a
bioactive
component
crucial
for
the
biogeochemical
cycling
of
Si
in
terrestrial
and
aquatic
ecosystems.
Its
formation
dissolution
dynamics
are
intricately
linked
to
carbon
(C)
cycling.
However,
knowledge
about
source,
composition,
factors
controlling
distribution
biogenic
coastal
wetland
sedimentary
environments
still
limited.
To
address
this
lack
knowledge,
we
introduced
suite
geometric
models
biovolume
calculation
investigated
assemblages,
along
with
Si‐occluded
C
contents,
sediments
from
representative
wetlands
west
coast
Bohai
Bay.
Our
analysis
showed
that
predominantly
derived
phytoliths
(78.1%
±
5.8%),
diatoms
(18.2%
4.8%),
sponge
spicules
(3.7%
2.9%).
Notably,
phytolith
assemblages
were
primarily
composed
forms
Poaceae
family.
The
content
(0.035–1.870
g
kg
−1
)
within
these
was
consistent
across
both
sites,
accounting
0.97–5.71%
total
organic
pool.
Structural
equation
modeling
indicated
C,
pH,
amorphous
aluminum
oxides
either
directly
or
indirectly
influenced
sediments.
These
results
demonstrate
critical
role
plays
cycle
provide
valuable
information
advances
our
understanding
interactions
between
