Abstract.
Forests
in
Europe
experienced
record-breaking
dry
conditions
during
the
2022
summer.
The
direction
which
various
forest
types
respond
to
climate
extremes
their
growing
season
is
contingent
upon
an
array
of
internal
and
external
factors.
These
factors
include
extent
severity
extreme
tree
ecophysiological
characteristics
adapted
environmental
cues,
exhibit
significant
regional
variations.
In
this
study
we
aimed
to:
1)
quantify
soil
atmospheric
dryness
comparison
two
most
years
past
(i.e.,
2003,
2018),
2)
response
different
drought
terms
canopy
browning
photosynthesis,
3)
relate
functional
forests
emerging
responses
observed
at
level.
For
purpose,
used
ERA5-Land
spatial
meteorological
dataset
between
1970
identify
with
dryness.
We
near-infrared
reflectance
vegetation
(NIRv)
derived
from
MOderate
Resolution
Imaging
Spectroradiometer
(MODIS),
OCO-2
solar
induced
fluorescence
(SIF)
as
observational
proxy
for
photosynthesis
based
on
SIF
data
product,
summer
2022,
particularly
southern
regions
pronounced
As
a
result,
extremely
led
average
30
%
more
widespread
decline
across
compared
2018,
60
2003.
Although
were
extensive
severe
(indicated
by
larger
max
z-score)
2018
negative
impact
forests,
indicated
declined
SIF,
was
significantly
2022.
Across
types,
deciduous
broad-leaved
negatively
affected
but
Evergreen
Needle-Leaf
(ENF)
distributed
northern
showed
enhanced
greening
signals
benefit
warming.
Higher
degree
damage
spite
less
previous
year
points
legacy
effect
canopies,
resilience
frequent
events.
Biogeosciences,
Journal Year:
2024,
Volume and Issue:
21(23), P. 5481 - 5494
Published: Dec. 11, 2024
Abstract.
Forests
in
Europe
experienced
record-breaking
dry
conditions
during
the
summer
of
2022.
The
direction
which
various
forest
types
respond
to
climate
extremes
their
growing
season
is
contingent
upon
an
array
internal
and
external
factors.
These
factors
include
extent
severity
extreme
tree
ecophysiological
characteristics
adapted
environmental
cues,
exhibit
significant
regional
variations.
In
this
study,
we
aimed
(1)
quantify
soil
atmospheric
dryness
2022
comparison
two
most
years
past
(2003
2018),
(2)
response
different
terms
canopy
browning
photosynthesis,
(3)
relate
functional
forests
emerging
responses
observed
remotely
at
level.
For
purpose,
used
spatial
meteorological
datasets
between
2000
identify
with
dryness.
We
near-infrared
reflectance
vegetation
(NIRv),
derived
from
Moderate
Resolution
Imaging
Spectroradiometer
(MODIS),
global
OCO-2
solar-induced
fluorescence
(GOSIF)
as
observational
proxy
for
ecosystem
gross
productivity
2022,
southern
regions
exceptionally
pronounced
resulted
a
30
%
more
widespread
decline
GOSIF
across
compared
drought
2018
60
2003.
Although
scores
were
extensive
severe
(indicated
by
larger
maximum
z
score)
negative
impact
on
forests,
indicated
declined
GOSIF,
was
significantly
Different
affected
varying
degrees
Deciduous
broadleaf
negatively
impacted
due
within
distribution
range.
contrast,
areas
dominated
evergreen
needleleaf
(ENF)
northern
positive
moisture
(SM)
anomaly
minimal
vapour
pressure
deficit
(VPD)
led
enhanced
greening
stronger
(SIF)
signals,
benefiting
warming.
higher
degree
damage
despite
less
conditions,
highlights
evident
vulnerability
European
future
droughts.
Forest Ecology and Management,
Journal Year:
2024,
Volume and Issue:
556, P. 121730 - 121730
Published: Feb. 1, 2024
A
warmer
climate
will
increase
aridity
and
threaten
forest
persistence
in
xeric
areas.
This
is
the
case
of
some
Atlas
cedar
(Cedrus
atlantica)
forests
showing
recent
growth
decline,
dieback
high
mortality
rates
North
Africa.
lower
resistance
to
drought,
manifested
as
stronger
loss,
could
drought-related
risk
these
has
been
found
for
gymnosperms
worldwide.
It
be
also
expected
that
changes
dryness
are
linked
large-scale
atmospheric
circulation
patterns
such
Atlantic
Oscillation
(NAO).
We
tested
hypotheses
by
analyzing
resilience
indices
(resilience,
recovery,
resistance)
derived
from
tree-ring
data.
sampled
nine
plots
located
north-western
Algeria,
where
shifted
towards
drier
conditions
1980s.
In
forests,
winters,
associated
positive
NAO
phases,
constrained
tree
resistance,
two
outputs
drought
impact.
During
dry
years,
index
decreased
elevation
increased.
The
association
between
severity
strengthening:
conditions,
resistance.
Resistance
showed
a
significant
higher
temporal
variability
8
out
9
intensified.
These
findings
have
allowed
identifying
new
early-warning
signal
stress.
Environment International,
Journal Year:
2024,
Volume and Issue:
186, P. 108611 - 108611
Published: March 28, 2024
Research
has
shown
that
forest
management
can
improve
the
post-drought
growth
and
resilience
of
Qinghai
spruce
in
eastern
Qilian
Mountains,
located
on
northeastern
Tibetan
Plateau.
However,
impact
such
tree-associated
phyllosphere
microbiome
is
not
yet
fully
understood.
This
study
provides
new
evidence
positive
effects
after
extreme
drought,
from
perspectives
community
diversity,
structure,
network
inference,
keystone
species,
assembly
processes.
In
managed
forest,
α-diversity
bacterial
communities
increased,
whereas
β-diversity
decreased.
addition,
became
more
stable
resistant,
less
complex,
following
management.
Keystone
species
inferred
a
also
changed
under
Furthermore,
mediated
changes
processes,
intensifying
influence
determinacy,
while
diminishing
stochasticity.
These
findings
support
hypothesis
re-assemble
community,
enhance
stability,
ultimately
tree
growth.
Overall,
highlights
importance
furnishes
insights
into
conservation
perspective
managing
microbial
processes
effects.
Ecological Informatics,
Journal Year:
2023,
Volume and Issue:
79, P. 102422 - 102422
Published: Dec. 12, 2023
Climate
change
has
made
it
essential
to
understand
the
effects
of
drought
on
carbon
dynamics
in
tropical
forest
ecosystems.
However,
research
postdrought
(PD)
period
is
relatively
limited,
particularly
with
regard
resilience
cycle
affected
by
available
water.
To
determine
water
availability
during
PD
and
legacy
forests,
we
used
a
spatially
explicit
individual-based
dynamic
global
vegetation
model
(SEIB-DGVM)
simulate
gross
primary
productivity
(GPP)
proxy
process.
We
established
multiple
supply
scenarios
based
ecological
demands
regional
climatic
standard
precipitation
through
composite
gradients
quantity
duration
characterize
variations
environmental
after
droughts
end.
Under
different
patterns,
degree
GPP
its
varied
significantly.
Specifically,
ecosystem
was
positively
correlated
percentage
negatively
until
conditions
returned
normal,
while
negative
effect
exhibited
opposite
relationship.
After
drought,
rapid
high-level
promoted
stronger
resiliency
moderated
effects.
Although
appeared
only
first
year
drought.
Observing
biomass
changes
roots,
leaves,
woody
plants,
herbaceous
plants
droughts,
clear
that
ecosystems
can
adjust
their
allocation
strategies
response
differences
availability.
more
accurately
predict
fate
forests
climate
change,
necessary
assess
impact
condition
processes.
Journal of Forestry,
Journal Year:
2024,
Volume and Issue:
122(3), P. 232 - 243
Published: Feb. 16, 2024
Abstract
In
2011,
the
forestlands
of
Texas
were
affected
by
one
most
severe
droughts
in
state’s
history,
killing
an
estimated
65
million
trees
East
region.
This
study
uses
USDA
Forest
Service
Inventory
and
Analysis
data
a
standardized
precipitation-evapotranspiration
index
to
estimate
major
tree
species
responses
2011
drought
Texas’
four
national
forests.
We
used
analysis
variance
linear
mixed-effect
model
evaluate
factors
contributing
mortality
growth.
found
that
rates
varied
greatly
during
period
relative
predrought
levels;
higher
stand
age,
density,
mean
summer
temperature
contributed
volume.
Study
Implications:
Drought
is
recurring
disturbance
agent
likely
continue
increase
frequency
severity
future.
provide
understanding
exceptional
as
its
impacts
on
resistance.
The
effects
forests
have
not
previously
been
evaluated.
represent
over
256,975
ha
(635,000
ac)
eastern
region
nearly
10%
all
public
land
Texas.
Our
results
are
useful
decision
makers
developing
strategies
protecting
face
potential
future
droughts.
Abstract.
Forests
in
Europe
experienced
record-breaking
dry
conditions
during
the
2022
summer.
The
direction
which
various
forest
types
respond
to
climate
extremes
their
growing
season
is
contingent
upon
an
array
of
internal
and
external
factors.
These
factors
include
extent
severity
extreme
tree
ecophysiological
characteristics
adapted
environmental
cues,
exhibit
significant
regional
variations.
In
this
study
we
aimed
to:
1)
quantify
soil
atmospheric
dryness
comparison
two
most
years
past
(i.e.,
2003,
2018),
2)
response
different
drought
terms
canopy
browning
photosynthesis,
3)
relate
functional
forests
emerging
responses
observed
at
level.
For
purpose,
used
ERA5-Land
spatial
meteorological
dataset
between
1970
identify
with
dryness.
We
near-infrared
reflectance
vegetation
(NIRv)
derived
from
MOderate
Resolution
Imaging
Spectroradiometer
(MODIS),
OCO-2
solar
induced
fluorescence
(SIF)
as
observational
proxy
for
photosynthesis
based
on
SIF
data
product,
summer
2022,
particularly
southern
regions
pronounced
As
a
result,
extremely
led
average
30
%
more
widespread
decline
across
compared
2018,
60
2003.
Although
were
extensive
severe
(indicated
by
larger
max
z-score)
2018
negative
impact
forests,
indicated
declined
SIF,
was
significantly
2022.
Across
types,
deciduous
broad-leaved
negatively
affected
but
Evergreen
Needle-Leaf
(ENF)
distributed
northern
showed
enhanced
greening
signals
benefit
warming.
Higher
degree
damage
spite
less
previous
year
points
legacy
effect
canopies,
resilience
frequent
events.
