Global Change Biology,
Journal Year:
2025,
Volume and Issue:
31(4)
Published: April 1, 2025
ABSTRACT
Climate
variability
poses
a
significant
threat
to
ecosystem
function
and
stability.
Previous
studies
suggest
that
multiple
facets
of
biodiversity
enhance
the
temporal
stability
forest
functioning
through
compensatory
effects.
However,
as
climate
change
intensifies,
two
key
questions
remain
unresolved:
(1)
mechanisms
by
which
different
sustain
carbon
sequestration
across
spatial
scales
(2)
how
influences
at
scales.
In
this
study,
based
on
data
from
262
natural
communities
in
temperate
forests
northeastern
China,
we
aggregated
metacommunities
varying
extents.
Using
ordinary‐least
squares
regression,
examined
relationships
between
(hereafter,
“stability”)
We
then
employed
mixed‐effects
models
assess
influence
biotic
Additionally,
applied
piecewise
structural
equation
modeling
disentangle
among
variability,
biodiversity,
Our
findings
indicate
(taxonomic,
functional,
phylogenetic
diversity)
primarily
insurance
Temperature
was
negatively
correlated
with
all
facets,
declines
were
associated
reduced
Precipitation
contrast,
α
diversity
but
positively
β
facets.
Unexpectedly,
precipitation
exhibited
an
overall
positive
correlation
These
results
increasing
temperature
may
pose
greater
ecosystems
future.
Thus,
preserving
will
be
critical
for
mitigating
adverse
effects
warming.
Furthermore,
impact
cannot
overlooked
arid
semi‐arid
regions.
study
provides
novel
insights
into
conservation
under
global
change.
Abstract
Aims
Plant-
and
microbial-derived
carbon
(C)
are
the
primary
sources
of
soil
organic
(SOC)
in
coastal
wetlands,
yet
their
contributions
across
vegetation
restoration
chronosequences
remain
poorly
understood.
Methods
Using
biomarker
approaches,
we
investigated
dynamics
total
lignin
phenols
(VSC)
microbial
necromass
C
(MNC)
SOC
over
a
20-year
chronosequence
(0,
4,
8,
11,
20
years)
Yellow
River
Delta
China.
Results
Vegetation
significantly
increased
VSC
MNC
contents,
but
both
showed
unimodal
patterns
with
age
peaked
at
8
years.
Restoration
to
(1.9–7.1%)
had
limited
effects
on
MNC,
which
averaged
28.64%—lower
than
anticipated.
The
contents
VSC,
vanillyl
phenols,
syringyl
cinnamyl
fungal
(FNC)
biomass
(MBC)
were
positively
correlated
content.
However,
Bacterial
(BNC)
no
significant
correlation
SOC.
Plant
coverage
C/N
ratio
main
drivers
source
changes,
showing
positive
negative
linear
relationships
content,
respectively.
Structural
equation
model
that
plant-derived
is
most
important
driver
SOC,
while
has
effect
Conclusions
Although
response
age,
Increasing
affected
by
plant
cover
enhanced
sequestration
compared
C.
