Wuhan University Journal of Natural Sciences,
Journal Year:
2023,
Volume and Issue:
28(1), P. 77 - 87
Published: Feb. 1, 2023
In
order
to
explore
the
response
of
soil
respiration
in
grassland
global
warming,
we
carried
out
a
warming
experiment
with
open
top
chambers
(OTCs)
subalpine
meadow,
Mount
Wutai
north
China.
Our
results
showed
meadow
across
2
500-2
700
m
above
sea
level
(ASL),
OTCs,
increased
by
2.00
μmol·m
-2
·s
-1
as
temperature
1.25
℃
on
average.
Warming
decreased
moisture
over
periods
except
October
2019
when
snow
melted
OTCs.
effect
peaked
at
178.31%
2019.
control
and
treatment,
based
exponential
regression
equations,
alone
accounted
for
85.3%
61.2%
variation,
respectively.
treatment
explained
23.2%
variation
power
equation
while
they
were
not
significantly
correlated
each
other.
The
relied
altitudes
well
time
year,
but
was
inhibited
moisture,
labile
carbon
pool,
available
nitrogen.
We
concluded
main
factor
influencing
respiration,
would
stimulate
meadows
future.
analysis
provided
new
data
characteristics
mechanisms
helped
further
understand
relationship
between
cycle
climate
change.
Forests,
Journal Year:
2023,
Volume and Issue:
14(6), P. 1207 - 1207
Published: June 11, 2023
The
priming
effect
(PE)
is
important
for
understanding
the
decomposition
of
soil
organic
matter
(SOM)
and
forecasting
C-climate
feedback.
However,
there
are
limited
studies
on
microbial
community-level
properties
keystone
taxa
involved
in
process.
In
this
study,
we
collected
from
a
subtropical
Phyllostachys
edulis
forest
undergoing
long-term
N-addition
conducted
an
incubation
experiment
to
evaluate
effects
single
repeated
addition
13C-labeled
glucose.
Our
results
demonstrated
that
previously
N-fertilized
had
smaller
cumulative
PE
compared
with
control
(11%
average
decrease).
This
could
be
primarily
explained
(26%)
by
lower
abundance
bacterial
r-strategy
group
members
(B_mod#2,
constituting
Proteobacteria,
Firmicutes,
Actinobacteria
phyla)
under
treatments.
A
C-addition
induced
greater
than
C-additions
(2.66-
3.11-fold).
Single
C
led
N
ratios
biomass
fungi
bacteria,
positively
impacting
PE,
indicating
shifts
fungal/bacterial
dominance
play
role
regulating
PE.
Moreover,
saprophytic
(F_Mod#3,
composed
phyla
Ascomycota)
62%
differences
between
C-additions.
Compared
C-additions,
B_Mod#2
F_Mod#3,
as
well
C-related
hydrolase
activity,
was
observed
C-addition,
inducing
Therefore,
sufficient
may
facilitate
proliferation
fungal
taxa,
thereby
increasing
SOM
decomposition.
findings
provide
novel
insights
into
relationship
Ecosphere,
Journal Year:
2024,
Volume and Issue:
15(3)
Published: March 1, 2024
Abstract
Soil
carbon
(C)
cycling
plays
a
critical
role
in
regulating
global
C
budget
and
atmospheric
CO
2
concentrations.
The
ongoing
warming
potentially
accelerates
soil
loss
induced
by
microbial
respiration
(MR)
makes
large
source
to
the
atmosphere.
Quantifying
drivers
of
MR
its
response
rising
temperature
(also
called
sensitivity,
Q
10
)
should
be
high
priority
improve
modeling
prediction
terrestrial
cycle
under
warming.
In
this
study,
we
applied
standardized
sampling
along
nine
gradients
from
410
1080
m
subtropical
forest
southern
China.
All
samples
were
incubated
at
varying
(10–15–20–25–20–15°C)
measure
every
day
for
three
weeks.
Then
all
measured
was
adjusted
field
each
elevation
gradient.
Our
objectives
examine
environmental
change
elevational
then
quantify
their
main
drivers.
We
totally
collected
54
abiotic
biotic
factors
relative
.
results
showed
that
increased
low
elevation.
However,
significant
trend
not
examined
after
adjusting
sites,
due
trade‐off
between
increasing
concentration
declining
as
increased.
further
found
did
cause
variation
negatively
dominated
quality,
which
declined
nonlinearly
gradients.
This
study
highlights
environment
determining
decomposition
uncertainty
measurements
caused
unifying
ignored
future
model
development.
Forests,
Journal Year:
2024,
Volume and Issue:
15(8), P. 1466 - 1466
Published: Aug. 21, 2024
The
temperature
sensitivity
(Q10)
of
soil
respiration
(Rs)
plays
a
crucial
role
in
evaluating
the
carbon
budget
terrestrial
ecosystems
under
global
warming.
However,
variability
Q10
along
moisture
gradients
remains
subject
debate,
and
associated
underlying
causes
are
poorly
understood.
This
study
aims
to
investigate
characteristics
changes
throughout
whole
growing
season
assess
factors
influencing
variability.
Changes
(measured
by
dynamic
chamber
method)
properties
were
analyzed
poplar
plantation
located
suburban
area
Beijing,
China.
results
as
follows:
(1)
increased
with
increasing
water
content
up
certain
threshold,
then
decreased,
(2)
threshold
was
75%
80%
field
capacity
(i.e.,
at
capillary
rupture)
rather
than
water-holding
capacity,
(3)
dominant
influence
shifted
from
solid-phase
microbes
moisture.
Our
important
for
understanding
relationship
between
sandy
soil,
refinement
modeling
cycling
ecosystems.
Wuhan University Journal of Natural Sciences,
Journal Year:
2023,
Volume and Issue:
28(1), P. 77 - 87
Published: Feb. 1, 2023
In
order
to
explore
the
response
of
soil
respiration
in
grassland
global
warming,
we
carried
out
a
warming
experiment
with
open
top
chambers
(OTCs)
subalpine
meadow,
Mount
Wutai
north
China.
Our
results
showed
meadow
across
2
500-2
700
m
above
sea
level
(ASL),
OTCs,
increased
by
2.00
μmol·m
-2
·s
-1
as
temperature
1.25
℃
on
average.
Warming
decreased
moisture
over
periods
except
October
2019
when
snow
melted
OTCs.
effect
peaked
at
178.31%
2019.
control
and
treatment,
based
exponential
regression
equations,
alone
accounted
for
85.3%
61.2%
variation,
respectively.
treatment
explained
23.2%
variation
power
equation
while
they
were
not
significantly
correlated
each
other.
The
relied
altitudes
well
time
year,
but
was
inhibited
moisture,
labile
carbon
pool,
available
nitrogen.
We
concluded
main
factor
influencing
respiration,
would
stimulate
meadows
future.
analysis
provided
new
data
characteristics
mechanisms
helped
further
understand
relationship
between
cycle
climate
change.
