Land Degradation and Development,
Год журнала:
2024,
Номер
35(17), С. 5295 - 5307
Опубликована: Окт. 10, 2024
ABSTRACT
Overgrazing
affects
the
grass‐livestock
balance
and
endangers
grassland
ecological
security.
Despite
extensive
studies
conducted
on
identifying
quantifying
grazing
intensity,
there
is
still
room
for
improvement
in
research
gridding
particularly
areas
with
limited
data
Qinghai–Tibet
Plateau.
Therefore,
we
proposed
a
intensity
spatialization
method
using
geographically
weighted
random
forest
(GWRF)
to
gain
further
insights
into
spatial
heterogeneity
of
alpine
intensity.
This
incorporates
multiple
remote
sensing
related
human
activities
natural
factors,
as
well
annual
livestock
statistics
at
township
level
over
several
years,
while
adequately
considering
autocorrelation
Additionally,
employed
Lindeman
Merenda
Gold
(LMG),
geographical
detector
model,
structural
equation
model
(SEM)
assess
contribution
influence
path
driving
factors
We
also
utilize
partial
correlation
analysis
dual‐phase
mapping
examine
impact
distribution
The
results
demonstrate
that
GWRF‐based
accurately
predicts
by
demonstrating
its
consistency
township‐scale
(
R
2
=
0.92
p
<
0.01),
RMSE
1.07).
provides
valuable
technical
support
pastoral
availability.
evaluate
trends
observe
an
increase
Gar
Purang
counties.
Furthermore,
population
density,
normalized
difference
vegetation
index
(NDVI),
temperature
are
identified
three
influential
affecting
areas.
other
indirectly
influencing
density
NDVI
levels,
their
interactions
amplify
overall
influence.
technique
has
demonstrated
significant
45.92%
0.01)
study
area,
emphasizing
substantial
Our
novel
framework
spatially
analyzing
unraveling
intricated
mechanisms
behind
spatiotemporal
changes,
Integrative Zoology,
Год журнала:
2023,
Номер
19(2), С. 240 - 252
Опубликована: Май 27, 2023
Abstract
Globally,
grassland
degradation
is
an
acute
ecological
problem.
In
alpine
on
the
Tibetan
Plateau,
increased
densities
of
various
small
mammals
in
degraded
are
assumed
to
intensify
process
and
these
subject
lethal
control.
However,
whether
negative
impact
solely
a
result
population
size
or
also
activity
behavior
has
not
been
tested.
this
study,
we
use
plateau
pika
as
model
compare
size,
core
area
colony,
number
burrow
entrances
latrines
between
lightly
severely
grassland.
We
test
alleged
contribution
burrowing
activities
individuals
response
lower
food
abundance.
found
that
resulted
plant
species
richness,
height,
biomass.
Furthermore,
overall
was
significantly
affected
by
location
areas
were
larger
had
higher
burrows
latrines.
Our
study
provides
convincing
evidence
habitat‐induced
changes
small,
mammals,
such
pika,
can
exacerbate
degradation.
This
finding
significant
implications
for
managing
restoring
ecosystems.
Ecological Informatics,
Год журнала:
2024,
Номер
82, С. 102688 - 102688
Опубликована: Июнь 17, 2024
Understanding
the
role
of
plant
diversity
in
maintaining
grassland
ecosystem
functioning
is
great
importance
ecological
research.
Despite
decades
research,
ecologists
have
struggled
to
understand
biodiversity-ecosystem
relationships
and
how
dominance
functional
groups
impacts
function.
In
attempting
(i)
temporal
patterns
above-
below-ground
biomass
(AGB
BGB)
species
richness,
(ii)
whether
richness
consistently
associated
with
AGB
BGB,
(iii)
relative
contributions
(forb,
grass,
legume,
sedge)
stabilizing
function,
we
used
productivity
data
meadow
steppe
alpine
Qinghai-Tibet
Plateau
(QTP)
for
period
2015–2019.
Our
results
show
that
both
grasslands
increased,
but
BGB
stayed
steady
over
5
years.
The
rising
tendency
was
caused
by
upward
trend
forbs
grasses,
which
are
dominant
QTP,
stressing
functioning.
were
significantly
positive
AGB,
stable
negative
BGB:AGB
ratio,
highlights
crucial
higher
Significant
differences
mean
among
sites
(9–19
8–22
meadow)
highlight
varying
levels
across
QTP.
While
42%
showed
reported
increasing
trends
at
58%
indicate
potential
changes
or
processes
these
areas.
while
remained
precipitation.
top
soil
layer
(0–10
cm)
dominated
observed
grasslands,
as
abundant
nutrients
provide
favorable
conditions
root
proliferation.
steppe,
formed
an
isometric
relationship
indicating
increased
BGB.
This
study
concludes
influenced
functioning,
grasses
productivity,
topsoil
contributed
three-quarters
provides
empirical
evidence
years,
greater
enhancing
These
findings
serve
a
scientific
reference
policymaking
regarding
stability.
Ecology and Evolution,
Год журнала:
2021,
Номер
11(11), С. 6672 - 6687
Опубликована: Май 1, 2021
Harvesting
of
orchids
for
medicine
and
salep
production
is
a
traditional
practice,
increasing
market
demand
spurring
illegal
harvest.
Ethno-ecological
studies
in
combination
with
the
effect
anthropogenic
disturbance
are
lacking
orchids.
We
compared
population
density
structure,
tuber
biomass
Dactylorhiza
hatagirea
(D.
Don)
Soó
three
years
two
sites:
Manang,
where
harvesting
medicinal
plants
was
locally
regulated
(protected),
Darchula,
unregulated
(unprotected).
Six
populations
were
studied
along
an
elevation
gradient
by
establishing
144
temporary
plots
(3
×
3
m2)
from
3,400
to
4,600
m
elevations.
Mean
D.
significantly
higher
protected
(1.31
±
0.17
plants/m2)
than
unprotected
(0.72
0.06
site.
The
site
showed
stable
high
reproductive
fitness
over
three-year
period.
A
significant
negative
(p
<
.1)
relative
radiation
index
(RRI)
on
adult
vegetative
stage
positive
herb
cover
juvenile
stages
found
using
mixed
zero-inflated
Poisson
(mixed
ZIP)
models.
densities
different
life
highly
sensitive
livestock
grazing.
Significant
interactions
between
grazing
indicated
particularly
strong
effects
these
disturbances
Semi-structured
interviews
conducted
informants
(n
=
186)
villages
at
ecological
survey
sites.
Our
interview
results
that
people
aware
conservation
status
maintain
sustainable
populations,
whereas
opposite
case
threatened.
Sustainability
therefore,
largely
depends
controlling
premature
grazing,
thus
indicating
need
permanent
monitoring
species.
