Atmosphere,
Год журнала:
2022,
Номер
14(1), С. 43 - 43
Опубликована: Дек. 26, 2022
Extreme
drought
events
reduce
the
productivity
of
forest
ecosystems.
One
approach
for
estimating
effects
on
forests
is
by
assessing
their
resilience.
The
objective
this
study
was
to
estimate
resilience
rates
at
different
heights
along
tree
stem
Pinus
durangensis
Martínez.
radial
growth
200
cross
sections
extracted
four
stems
(0.07–0.15,
1.3,
6.3,
and
11.0–12.0
m)
analyzed
subsequently
transformed
into
ring-width
indices
(RWI).
These
were
correlated
with
Standardized
Precipitation-Evapotranspiration
Index
a
six-month
time
scale
(accumulated
six
months
in
period
February–May;
SPEI06FM).
Seven
extreme
identified
(1890,
1902,
1956,
1974,
1999,
2006,
2011),
before,
during,
after
each
event
determined.
Based
index
values,
resistance,
recovery,
calculated.
results
indicated
significant
correlation
(p
≤
0.05)
between
annual
increment
climate
(0.56
0.80).
Climatic
sensitivity
higher
lower
part
stem,
mean
(MS)
expressed
population
signal
(EPS)
values
0.38
0.97,
respectively.
Resistance
ranged
from
0.44
0.76
better
stem.
Resilience
changed
over
time.
Regardless
height
latest
(1999,
2011)
have
led
trees,
indicating
that
recovery
capacity
has
decreased.
Therefore,
forestry
practices
area
may
consider
managing
density
as
strategy
regulate
stress
competition
increase
tolerance
trees
drought.
Remote Sensing,
Год журнала:
2023,
Номер
15(4), С. 902 - 902
Опубликована: Фев. 6, 2023
The
Qinghai-Tibetan
Plateau
(QTP)
is
a
global
center
of
cold
and
dry,
where
the
most
extensive
fragile
alpine
vegetation
exists.
Quantitative
analysis
drought
event
characteristics
response
to
on
QTP
indispensable
for
understanding
increasing
events
in
warming
climate
which
exacerbate
adverse
influence
extremely
ecosystems.
Here,
using
standardized
precipitation
evapotranspiration
index
(SPEI)
normalized
difference
(NDVI)
from
2000
2018,
this
study
analyzed
events,
their
temporal
impacts,
stability
QTP.
Results
showed
that:
have
clear
spatial
heterogeneity.
When
compared
east
monsoon
region,
western
regions
higher
frequency
lower
intensity
events.
Drought
has
significant
effects
grassland
areas
during
growing
season,
reach
peak
July
August.
0–1-month
3-month
time
scales
were
optimal
lagged
accumulated
respectively.
heterogeneity
varied
with
eco-geographical
types.
Generally,
forest
high
resistance
(74.09)
resilience
(2.26),
followed
by
crop
areas.
Ecological Indicators,
Год журнала:
2023,
Номер
151, С. 110275 - 110275
Опубликована: Апрель 24, 2023
Recently,
forests
in
the
Tianshan
Mountains
have
shown
a
marked
decline
growth
and
an
increased
mortality
rate
because
of
more
frequent
severe
effects
extreme
drought,
which
threatens
ecosystem
services
they
provide.
To
achieve
forest
conservation
sustainable
development
benefits,
it
is
crucial
to
understand
post-drought
recovery
trajectory
tree
its
driving
factors.
In
this
study,
we
quantified
performance
dominant
species
after
drought
events
determined
influences
climate
factors
on
resilience
using
tree-ring
proxy
data.
The
results
showed
that
moisture
conditions
may
determine
trees.
for
1997
was
higher
than
1974,
be
attributed
subsequent
period
experiencing
very
high
precipitation,
whereas
year
following
1974
dry
(Standardized
Precipitation
Evapotranspiration
Index
<
0).
Because
favorable
period,
observed
relationship
between
resistance
closer
fit
hypothetical
"line
full
resilience"
sets
constant
value
1,
allowing
trees
recover
fully
at
any
given
resistance.
Trees
lower
mean
values
index
(RC)
average
(ARR)
total
reduction
(TGR)
(RE)
event
1997.
We
distinguished
relative
influence
temperature
precipitation
different
phases
Boosted
Regression
Tree
(BRT)
model.
during
variation
were
most
influential
variables
recovery.
Specifically,
explained
up
20
%
variance
RC,
TGR,
RE,
ARR.
These
findings
deepen
our
understanding
impacts
prolonged
growth,
could
aid
developing
management
strategies
respond
drought.
Forests,
Год журнала:
2022,
Номер
13(12), С. 2016 - 2016
Опубликована: Ноя. 29, 2022
The
constant
rise
in
the
global
temperature
and
unpredictable
shifts
precipitation
patterns
are
two
of
main
effects
climate
change.
Therefore,
there
is
an
increasing
amount
interest
identification
tree
species,
provenances
genotypes
capable
withstanding
more
arid
conditions
tolerating
drought
stress.
In
present
review,
we
focus
our
attention
on
generally
susceptible
conifers
describe
different
strategies
that
plants
adopt
to
respond
We
approaches
taken
studies
conifer
adaptations
low
water
availability,
advantages
limitations
each,
results
obtained
with
each
these
recent
years.
Then
discuss
how
morphological,
physiological
genetic
data
may
find
practical
applications
forest
management,
particular
next-generation
breeding
programs.
Finally,
provide
some
recommendations
for
future
research.
particular,
suggest
extending
a
broader
selection
species
genera,
number
adult
plants,
those
gene
expression,
distinguishing
between
types
stress
can
withstand
during
its
life
cycle.
integration
coming
from
disciplines
will
be
key
factor
knowledge
about
trait
as
complex
resistance.
Forest Ecology and Management,
Год журнала:
2024,
Номер
571, С. 122201 - 122201
Опубликована: Авг. 27, 2024
More
frequent
and
severe
droughts
have
affected
forest
ecosystems
throughout
Europe
in
recent
decades.
In
Central
Europe,
large-scale
dieback
of
Norway
spruce
has,
for
example,
been
observed,
whereas
decline
was
so
far
less
widespread
Eastern
Europe.
To
assess
the
potential
future
impacts
drought
on
southeastern
part
its
natural
distribution,
studies
resilience
are
urgently
needed.
Here,
we
use
a
tree-ring
network
consisting
more
than
3000
trees
from
158
managed
stands
different
ages
distributed
along
elevational
gradients
Carpathians
to
growth
responses
drought.
Specifically,
analyzed
differences
components
(e.g.,
resistance,
recovery,
resilience,
recovery
period)
with
elevation
tree
age,
used
'line
full
resilience'
concept
comprehensively
resilience.
Our
results
show
that
at
low
elevations
(<800
m)
is
characterized
by
lowest
resistance
drought,
though
has
high
while
(>1400
m),
higher
associated
recovery.
general,
older
were
found
need
time
recover.
Resilience
decreases
water
deficit,
suggesting
risk
ongoing
climate
change,
urging
adaptative
management.
•
Spruce
assessed
using
Carpathians.
suffers
most
elevations,
it
recovers
quickly.
Older
risk.
