Authorea (Authorea),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 30, 2024
Microbial
residue
carbon
(MRC)
is
an
important
source
of
soil
organic
(SOC)
formation
and
plays
a
vital
role
in
the
accumulation
retention
SOC.
Vegetation
restoration
effective
strategy
to
restore
degraded
lands.
However,
there
are
no
studies
on
how
MRC
profile
changes
with
vegetation
restoration.
We
evaluated
(using
amino
sugars)
its
contribution
SOC
different
depths
(0-20,
20-50,
50-100
cm)
during
severely
eroded
forest
(CK),
restored
(as
ecological
management),
orchard
development
management
model),
secondary
ideal
control).
biomarkers
were
extracted
from
profiles
used
measure
microbial
diversity
community
composition
16S
rRNA).
restoration,
depth,
their
interaction
each
other
significantly
affected
MRC,
fungal
(FRC),
bacterial
(BRC)
contents.
The
content
showed
increasing
trend
for
four
models
following
order:
CK
<
forest.
Furthermore,
increased
depth
rapid
was
substantially
influenced
by
SOC,
total
nitrogen
content,
pH,
diversity,
phylum,
phylum.
In
conclusion,
model
play
roles
red
erosion
area.
These
findings
pivotal
improving
our
mechanistic
understanding
regulation
preservation
ecosystem.
Global Change Biology,
Journal Year:
2023,
Volume and Issue:
29(24), P. 7131 - 7144
Published: Oct. 19, 2023
Plant
communities
strongly
influence
soil
microbial
and,
in
turn,
carbon
(C)
cycling.
Microbial
use
efficiency
(CUE)
is
an
important
parameter
for
predicting
C
accumulation,
yet
how
plant
and
community
traits
CUE
remains
poorly
understood.
Here,
we
determined
influenced
by
traits,
studying
a
natural
gradient
of
species
diversity
subtropical
forest.
Our
results
showed
that
increased
with
increasing
tree
diversity,
suggesting
correlation
between
storage.
The
specific
properties
explained
the
greatest
variation
were
associated
(biomass,
enzyme
activities
ratio
oligotrophic
to
copiotrophic
taxa);
there
weaker
correlations
plant-input
properties,
chemistry
organic
quality
its
mineral
protection.
Overall,
high
was
correlated
diversity:
higher
substrate
availability
(simple
SOM
chemical
structures
weak
associations)
growth
rates
despite
dominance
strategists.
point
mechanism
which
may
increase
forest
sink
affecting
community.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(6)
Published: June 1, 2024
Understanding
the
mechanisms
of
soil
organic
carbon
(SOC)
sequestration
in
forests
is
vital
to
ecosystem
budgeting
and
helps
gain
insight
functioning
sustainable
management
world
forests.
An
explicit
knowledge
driving
global
SOC
still
lacking
because
complex
interplays
between
climate,
soil,
forest
type
influencing
pool
size
stability.
Based
on
a
synthesis
1179
observations
from
292
studies
across
forests,
we
quantified
relative
importance
property,
total
content
specific
contents
physical
(particulate
vs.
mineral-associated
SOC)
chemical
(labile
recalcitrant
pools
upper
10
cm
mineral
soils,
as
well
stock
O
horizons.
The
variability
soils
was
better
explained
by
climate
(47%-60%)
factors
(26%-50%)
than
NPP
(10%-20%).
particulate
(POC)
(ROC)
all
decreased
with
increasing
mean
annual
temperature
decomposition
overrides
C
replenishment
under
warmer
climate.
(MAOC)
influenced
temperature,
which
directly
affected
microbial
activity.
Additionally,
presence
clay
iron
oxides
physically
protected
forming
MAOC.
horizons
larger
temperate
zone
Mediterranean
regions
boreal
sub/tropical
zones.
Mixed
had
64%
either
broadleaf
or
coniferous
(i)
higher
productivity
(ii)
litter
input
different
tree
species
resulting
diversification
molecular
composition
community.
While
jointly
determine
formation
stability
SOC,
predominantly
controls
patterns
ecosystems.
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: Feb. 28, 2024
Soil
microorganisms
and
enzymes
play
crucial
roles
in
soil
organic
carbon
(SOC)
sequestration
by
promoting
aggregate
formation
stability
participating
SOC
cycling
accumulation.
However,
the
effects
which
act
as
mediators
driving
dynamic
changes
during
rapid
urbanization
remain
unclear.
Therefore,
this
study
selected
built-up
area
of
Nanchang
City,
China
(505
km
2
),
area.
Sampling
surveys
were
conducted
using
184
sample
plots
stratified
based
on
proportion
impermeable
surface
to
distinguish
different
levels.
The
factors
aggregates
process
analyzed
microbial
community
enzyme
activities.
results
demonstrated
that
with
an
increase
intensity,
both
content
stock
exhibited
a
significant
decline
(
p
<
0.05).
highest
contribution
rate
observed
0.25–1
mm
aggregates,
they
significantly
influenced
In
addition,
biomass
gram-positive
bacteria
(G+)
actinomycetota,
activities
N-acetylglucosaminidase
acid
phosphatase
(AP)
higher
low-urbanization
areas
than
high-urbanization
each
was
positively
correlated
fungi,
arbuscular
mycorrhizal
G+,
gram-negative
bacteria,
protozoa,
β-1,4-glucosidase,
N-acetylglucosaminidase,
AP,
urease,
catalase.
Compared
enzymes,
greater
role
(22.7%).
Additionally,
structural
equation
model
indicated
can
directly
or
indirectly
lead
decrease
altering
physicochemical
properties
affecting
dynamics.
larger
vegetation
characteristics
index
mitigate
negative
impacts
SOC.
Overall,
had
impact
storage.
future,
it
is
important
consider
strategies
focus
improving
nutrients,
maintaining
structure,
protecting
existing
urban
trees,
enhancing
plant
diversity
process.
These
measures
help
activity,
thereby
aggregate-related
content.
could
contribute
greenspaces.
Journal of Applied Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 10, 2025
Abstract
Soil
nitrogen
status
is
tightly
related
to
vegetation
productivity
and
ecosystem
carbon
sequestration.
Therefore,
how
increasing
plant
species
diversity
(PSD)
during
restoration
or
afforestation
affects
soil
pool
would
ultimately
determine
its
effects
on
Though
diversifying
has
been
found
benefit
accumulation,
it
influences
microbial
necromass
(MNN),
which
a
major
constituent
of
pool,
remains
unexplored.
Forty‐five
plots
with
different
PSD
were
selected
in
subtropical
forest
the
being
calcareous.
MNN
was
indexed
by
amino
sugars
growth,
use
efficiency,
other
biotic
abiotic
variables
simultaneously
measured
explore
influence
pool.
Increasing
significantly
(
p
<
0.05)
stimulated
growth
contents
fungal,
bacterial,
total
MNN,
but
only
marginally
=
0.07)
enhanced
efficiency.
Structural
equation
modelling
revealed
that
PSD‐stimulated
content
enhancing
biomass
through
three
paths,
is,
promoting
via
availability
relative
abundance
copiotrophic
taxa,
inputs
plant‐derived
available
substrates,
improving
mineral
protection
elevating
exchangeable
calcium
magnesium
levels.
However,
did
not
alter
contribution
likely
owing
proportional
increase
organic
marginal
Synthesis
applications
:
These
findings
highlight
an
effective
measure
for
accumulation.
Considering
importance
supporting
sequestration,
current
study
advocates
incorporation
afforestation.
Journal of Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 11, 2025
Abstract
Plant
diversity
loss
caused
by
climate
change
decreases
soil
organic
carbon
(SOC)
sequestration,
but
the
mechanism
involved
remains
unclear.
Investigating
changes
in
microbial
necromass
(MNC)
accumulation
along
a
climate–plant
species
gradient
can
help
clarify
this
mechanism,
as
it
is
crucial
for
stability
of
SOC.
We
conducted
large‐scale
sampling
across
2500‐km
transect
through
grasslands
on
Tibetan
Plateau
to
investigate
MNC
content
and
its
contribution
SOC
at
depths
0–20
20–40
cm
response
environmental
plant
gradients.
richness,
biomass,
proportion
above‐ground
biomass
accounted
Cyperaceae
(sedges)
increased
with
decreasing
aridity
rising
altitude.
Meanwhile,
content,
SOC,
ratio
fungal
bacterial
both
layers
also
aridity.
These
results
indicate
that,
addition
changing
factors
altitudinal
gradient,
richness
plays
pivotal
role
facilitating
thus
accrual
Structural
equation
modelling
revealed
that
increases
enhancing
abundance
grassland.
A
higher
significantly
root
level
rhizodeposition,
thereby
increasing
activity
microbes,
ultimately
MNC.
Synthesis
.
conclude
dominate
Plateau.
findings
demonstrate
importance
incorporating
into
conservation
efforts
mitigate
negative
impacts
human
activities
