Frontiers in Plant Science,
Год журнала:
2024,
Номер
15
Опубликована: Март 27, 2024
Introduction
Extreme
environments
such
as
prolonged
high
temperatures
and
droughts
can
cause
vulnerability
of
vegetation
ecosystems.
The
dry-hot
valleys
Southwestern
China,
known
for
their
extremely
annual
temperature,
lack
water,
unique
non-zonal
“hot
island”
habitat
in
the
global
temperate
zone,
provide
exceptional
sites
studying
how
plant
adapts
to
dry
hot
environment.
However,
specific
local
biotic-environment
relationships
these
regions
remain
incompletely
elucidated.
study
aims
evaluate
valley-type
Savanna
species
communities
adapt
long-term
drought
high-temperature
stress
environments.
Methods
investigated
changes
diversity
communities’
aboveground
biomass
a
along
an
elevation
gradient
Yuanmou
valley
Jinsha
River
basin,
southwest
China.
Subsequently,
general
linear
model
was
utilized
simulate
distribution
pattern
diversities
constituent
gradient.
Finally,
RDA
VPH
mothed
were
used
impacts
contributions
environmental
factors
or
variables
on
patterns.
Results
discussion
field
survey
reveals
altitudinal
effect
Savanna,
with
dominant
shrubs
herbs
plants
below
1700m,
significant
positive
relationship
between
SR
,
Shannon-Wiener
Simpson
Pielou
indices
altitudes.
Relatively,
community
did
not
increase
significantly
elevation,
which
mainly
due
decreased
herbaceous
elevation.
Different
regulators
shrub-herbaceous
functional
groups
made
different
patterns
Savannas.
Herbaceous
are
responsible
maintaining
ensuring
stability
vegetation.
influence
became
more
pronounced
conditions
varied
Furthermore,
influenced
by
soil
climatic
factors,
whereas
regulated
groups.
demonstrates
that
spatial
formed
result
responses
productive
capacity
retained
climate-soil
highlighting
value
Valley
microcosm
exploring
intricate
interactions
evolution
factors.
Ecological Indicators,
Год журнала:
2023,
Номер
148, С. 110121 - 110121
Опубликована: Март 14, 2023
Protected
areas
(PAs)
play
a
key
role
in
mitigating
ecological
crises.
Currently,
priority
protected
(PPAs)
focus
on
biological
conservation,
and
few
studies
have
considered
the
connectivity
between
patches.
Few
formulated
future
conservation
measures
from
two
dimensions
of
security
pattern
(ESP)
reserve
effectiveness.
To
fill
this
gap,
study
use
ESP
to
identify
that
meet
objectives.
We
take
Wuhan
metropolitan
area
as
research
area.
constructed
framework
for
formulating
development
plans
based
areas.
The
complete
method
system,
we
focused
construction
evaluation
index
system
landscape
connectivity.
Then,
effectiveness
PAs
could
be
evaluated,
PPAs
identified.
results
showed
there
were
five
isolated
among
existing
PAs.
Moreover,
total
was
9328.91
km2,
they
had
high
value.
Due
low
protection
rate
PPAs,
are
not
main
target
PAs;
thus,
new
According
our
plan,
with
different
classes
will
achieve
functions
work.
Our
focuses
achieving
sustainable
formulates
environmental
land
planning
balance
urban
development.
It
can
provide
information
support
realization
2030
vision
Remote Sensing,
Год журнала:
2022,
Номер
14(19), С. 4726 - 4726
Опубликована: Сен. 21, 2022
The
Qinghai–Tibetan
Plateau
(QTP)
is
one
of
the
most
vulnerable
ecosystems
worldwide.
Over
last
few
decades,
QTP
has
been
subjected
to
increasing
external
pressures,
such
as
climate
change,
human
activity,
and
natural
hazards.
Therefore,
ecological
risk
assessment
vital
for
environmental
protection
sustainable
development
QTP.
A
landscape
(LER)
based
on
disturbance
vulnerability
was
performed
explore
spatiotemporal
characteristics
associated
with
LER
in
from
1990
2020.
Furthermore,
impact
quantitatively
evaluated
a
boosted
regression
tree
model.
Results
showed
that
more
than
70%
locations
exhibited
below-medium
LER.
demonstrated
downward
trends
presented
during
periods
2001
2012
2020
no
significant
trend
period
2002
2011.
Additionally,
high-LER
areas
were
concentrated
northwestern
QTP,
whereas
low-LER
mainly
southeastern
displayed
clustering
across
Changes
climate,
topographic
distribution,
activity
influenced
stability
study
area.
Precipitation
temperature
had
strongest
effects
LER,
followed
by
elevation
grazing
intensity.
Lower
precipitation
temperatures
higher
Our
results
provide
precise
specific
support
management
other
ecologically
fragile
areas.
Ecological Indicators,
Год журнала:
2023,
Номер
154, С. 110521 - 110521
Опубликована: Июнь 24, 2023
Identifying
the
spatial
heterogeneity
characteristics
of
ecosystem
services
(ESs)
and
their
influencing
mechanisms
is
crucial
for
regional
ecological
management
sustainable
development.
This
study
quantified
net
primary
production
(NPP),
water
yield
(WY),
soil
conservation
(SC),
sand
fixation
(SF),
habitat
quality
(HQ)
total
service
(TES)
on
Qinghai
Tibet
Plateau
(QTP),
then
analyzed
spatial–temporal
ESs.
The
geographical
detector
model
(GDM),
geographically
weighted
regression
(GWR)
model,
constraint
lines
were
used
to
explore
effects
factors
results
showed
that
(1)
NPP,
WY,
SC,
HQ
TES
an
increasing
trend
from
2000
2018,
while
SF
a
decreasing
trend.
SC
distribution
pattern
"high
values
in
southeast
low
northwest",
high
located
northern
QTP
southern
QTP.
(2)
NDVI
was
key
factor
TES,
precipitation
dominated
mainly
influenced
by
Largest
patch
index
(LPI).
(3)
In
most
areas,
natural
(precipitation,
temperature,
DEM,
slope
NDVI)
had
positive
both
negative
HQ.
human
(Resident,
Road
LPI)
other
There
non-monotonic
Overall,
much
stronger
influence
ESs
than
factors,
interactions
among
independent
effects.
this
can
provide
basis
protection
