Land Degradation and Development,
Journal Year:
2022,
Volume and Issue:
34(4), P. 1171 - 1181
Published: Nov. 7, 2022
Abstract
Soil
nematodes
play
pivotal
roles
in
the
soil
food
web.
However,
trophic
regulation
on
micro‐food
web
and
its
temporal
dynamics
are
less
explored.
Here,
we
investigated
seasonal
of
nematode
community
an
alpine
grassland
Qinghai–Tibet
Plateau
at
non‐degraded
(ND),
moderately
degraded
(MD)
severely
(SD)
stages,
either
under
open‐top
chamber
warming
(W)
or
not
(NW).
Nematode
richness
was
higher
SD
than
MD
ND
that
did
differ,
accompanied
by
a
clear
shift
from
bottom‐up
via
belowground
productivity
to
top‐down
omnivore
predator
SD.
The
intensified
explained
increased
proportions
nematodes,
likely
induced
expanded
pore
size
As
result,
accelerated
turnover
observed
degradation,
which
were
0.006
(slope,
p
=
0.78),
0.045
(
0.07),
0.077
0.001)
ND,
MD,
SD,
respectively.
Moreover,
degradation
strengthened
association
between
density
ecosystem
respiration,
whose
slope
(0.0025,
<
0.05)
(0.0008,
0.01)
(insignificant).
In
contrast,
affect
community,
richness,
nor
role
respiration.
Overall,
revealed
determining
respiration
suggesting
cascade
changes
may
alter
functioning.
Frontiers in Plant Science,
Journal Year:
2022,
Volume and Issue:
13
Published: April 6, 2022
An
understanding
of
soil
moisture
conditions
is
crucial
for
hydrological
modeling
and
processes.
However,
few
studies
have
compared
the
differences
between
dynamics
content
response
to
precipitation
infiltration
under
different
types
vegetation
on
Qinghai-Tibet
Plateau
(QTP).
In
this
study,
a
sensor
was
used
continuous
volumetric
measurements
during
2015
2016,
with
aim
exploring
variations
in
its
across
two
(alpine
meadow
alpine
shrub).
Our
results
showed
that
temporal
at
surface
(0–20
cm)
middle
layers
(40–60
were
consistent
patterns
both
types.
there
clear
lag
deep
(80–100
cm).
Soil
found
be
significantly
positively
related
negatively
air
temperature.
Aboveground
biomass
associated
growing
season.
Statistically
significant
observed
water
surface,
middle,
(
p
<
0.05).
(19.81%)
layer
lower
than
(24.75%)
shrubs,
opposite
trend
meadows.
The
maximum
depth
shrubs
greater
meadows
extremely
high-precipitation
events,
which
indicates
might
less
susceptible
runoff
extreme
events.
Furthermore,
low
amounts
did
not
affect
either
type,
whereas
increased
suggest
series
small
events
may
same
effect
as
single
large
event
produces
equivalent
total
rainfall.
Frontiers in Environmental Science,
Journal Year:
2025,
Volume and Issue:
13
Published: Feb. 25, 2025
Soil
temperature
(ST)
and
soil
moisture
(SM)
are
two
fundamental
land
surface
variables
that
directly
or
indirectly
affect
the
processes
functions
of
alpine
ecosystems.
To
clarify
dynamics
interactions
SM
ST
during
degradation
restoration
swamp
meadow,
four
successional
stages
meadow
(non-degraded,
NG;
Kobresia
humilis-dominated
degraded,
DG1;
bare
soil/weed-type
DG2;
artificially
restored,
RE)
were
selected
to
measure
at
10,
20
30
cm
depths
with
30-minute
time
interval
in
2021
2022.
Results
showed
that:
(1)
With
10
depth
decreased
first,
then
increased
significantly
(p
<
0.05),
which
was
attributed
role
vegetation
coverage
organic
carbon
evaporation
water
holding
capacity,
respectively;
(2)
various
did
not
respond
diverse
>
0.05);
(3)
The
relationships
between
varied
seasons,
positive
negative
linear
correlation
spring
summer,
exponential
autumn
winter
0.01).
study
different
will
provide
theoretical
support
for
research
related
ecological
such
ecosystem.
Ecological Indicators,
Journal Year:
2022,
Volume and Issue:
135, P. 108541 - 108541
Published: Jan. 10, 2022
Alpine
shrub-meadow
is
an
important
ecosystem
type
on
the
Qinghai-Tibetan
Plateau,
providing
a
variety
of
services
while
supporting
livelihoods
pastoralists.
However,
there
clear
lack
understanding
changes
in
spatial
patterns
and
alpine
degradation.
This
study
combined
aerial
photography
ground
surveys
to
investigate
analyse
impact
degradation
their
services,
relationships
between
services.
The
results
showed
that
led
fragmentation
patchiness
shrub-meadow,
as
evidenced
by
decrease
proportion
shrub
meadow
area
average
patch
size,
well
complexity
boundaries
shapes.
Light
moderate
reduced
all
with
carbon
storage,
nutrient
supply
water
retention
decreased
27.4%,
17.3%
13.8%
respectively,
forage
65.2%
at
heavy
degradation,
reduction
was
even
greater.
Regulating
increased
again
due
accumulation
slow
decomposition
plant
underground
roots,
rodent
activity.
layer
were
more
closely
related
its
than
layer,
positively
Our
findings
suggest
may
be
non-linear
need
interpreted
caution
should
analysed
comprehensively
wider
range
influencing
factors.
have
implications
for
grassland
restoration
service
management
Plateau.
Frontiers in Plant Science,
Journal Year:
2023,
Volume and Issue:
14
Published: March 30, 2023
Global
climate
warming
and
shifts
in
rainfall
patterns
are
expected
to
trigger
increases
the
frequency
magnitude
of
drought
and/or
waterlogging
stress
plants.
To
cope
with
water
stress,
plants
develop
diverse
tactics.
However,
adoption
capability
mechanism
vary
depending
upon
plant
species
identity
as
well
duration
intensity.
The
objectives
this
study
were
evaluate
species-dependent
responses
alpine
herbaceous
stress.
Nine
subjected
different
stresses
(including
moderate
waterlogging)
pot
culture
using
a
randomized
complete
block
design
three
replications
for
each
treatment.
We
hypothesized
that
would
negatively
impact
growth
metabolism.
found
considerable
interspecies
differences
morphological,
physiological,
biochemical
when
exposed
same
regime.
In
addition,
we
observed
pronounced
interactive
effects
regime
on
height,
root
length,
root/shoot
ratio,
biomass,
contents
chlorophyll
a,
b,
(a+b),
carotenoids,
malondialdehyde,
soluble
sugar,
betaine,
protein
proline,
implying
respond
differently.
Our
findings
may
cast
new
light
ecological
restoration
grasslands
wetlands
Qinghai-Tibetan
Plateau
by
helping
select
stress-tolerant
species.
