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.
Forests,
Journal Year:
2024,
Volume and Issue:
15(7), P. 1136 - 1136
Published: June 29, 2024
Slope
orientation
significantly
influences
soil’s
physicochemical
properties
and
the
soil
hydrological
environment.
However,
regulatory
mechanisms
effects,
particularly
in
semi-arid
highlands,
remain
poorly
understood.
This
study
investigated
on
shaded
sunny
slopes.
Results
indicated
that
0–20
cm
layer,
water-holding
capacity
was
higher
slopes,
while
water
retention
10–20
layer
suggests
vegetation
slopes
experiences
less
erosion
due
to
topsoil
retention.
Additionally,
slope
altered
properties:
electrical
conductivity
(EC)
of
Nutrient
elements
such
as
Ca,
Cu,
Zn
were
also
relatively
whereas
organic
matter
lower
compared
Overall,
supply
primarily
controlled
by
EC,
followed
capillary
porosity
nutrient
like
Mn,
Fe.
Therefore,
has
a
significant
effect
properties,
with
stronger
These
findings
offer
valuable
insights
for
restoration
highland
ecosystems.
Ecology and Evolution,
Journal Year:
2021,
Volume and Issue:
11(21), P. 14905 - 14915
Published: Oct. 7, 2021
Abstract
Plateau
pika
burrows
are
common
feature
of
degraded
grassland
in
the
Qinghai–Tibet
(QTP)
and
serve
as
an
important
indicator
activity
degradation.
However,
current
understanding
spatial
pattern
changes
their
critical
thresholds
across
a
degradation
gradient
alpine
is
deficient.
In
this
study,
we
investigated
quantified
plateau
under
typical
shrub
meadows
northeastern
QTP
using
unmanned
aerial
vehicle
landscape
metrics.
The
meadow
leads
to
change
from
two‐layered
structure
mosaic
bare
soil,
with
scattered
throughout.
Moderate
tipping
point
for
surface
patterns,
followed
by
disappearance
shrub,
retreat
encroachment
increasing
density
size
burrows.
area
characteristics
have
influenced
burrow,
maintaining
its
proportional
vital
measure
control
threat
pastures.
results
paper
provide
methodological
reference
guidance
sustainable
utilization
on
QTP.
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(10)
Published: Oct. 1, 2024
ABSTRACT
About
35%
of
grassland
in
Sanjiangyuan
area
China
has
degenerated
into
black‐soil
mountain.
Artificial
is
considered
to
be
an
effective
measure
alleviate
the
severely
degraded
alpine
region
three
rivers
and
been
widely
used.
However,
pattern,
potential
function,
changes
carbon
nitrogen
contents
soil
microorganisms
Heimushan
by
planting
artificial
are
still
unclear.
In
this
study,
mixed‐sown
(AG)
was
focus
our
whereas
mountain
(BG)
natural
(NG)
served
as
controls.
Illumina
16S
ITS
gene
sequence
analyses
were
used
analyze
community
structure
bacteria
fungi.
The
functional
groups
NG,
AG,
BG
predicted
using
FAPROTAX
FUNGuild
databases.
addition,
levels
carbon,
nitrogen,
enzyme
activities
evaluated.
results
indicated
a
significant
increase
aboveground
biomass
due
grassland.
Moreover,
total
(TC),
(TN),
ammonium
(),
microbial
(MBC),
(MBN),
leucine
aminopeptidase
(LAP)
increased
soil.
Planting
grasslands
changed
composition
bacterial
fungal
communities.
Among
these,
more
sensitive
grasslands.
relative
abundance
involved
cycling
significantly,
suggesting
that
may
play
role
regulating
nutrient
during
planting.
Soil
TC,
TN,
LAP,
affected
related
nitrogen.
β‐1,4‐glucosidase
factors,
respectively,
These
indicate
can
effectively
enhance
productivity
regulate
communities
physical
chemical
properties.
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.
