Agronomy,
Год журнала:
2023,
Номер
13(5), С. 1345 - 1345
Опубликована: Май 11, 2023
Clarifying
the
response
of
plant
phenology
to
drought
duration
is
helpful
for
accurately
interpreting
and
predicting
carbon
sinks
in
ecosystems.
Based
on
different
phenological
periods
dominant
species
Stipa
krylovii
monthly,
seasonal,
semiannual
time
scale
typical
steppe
Inner
Mongolia
from
1983
2018,
results
revealed
that
(1)
start
growing
season
(SOS)
was
characterized
by
an
advance–delay–advance
pattern,
heading
stage
(HOS),
flowering
(FOS),
end
(EOS)
all
showed
consistent
advanced
trends,
which
provided
additional
insight
into
conclusions
previous
studies
found
SOS
arid
semiarid
regions.
(2)
The
mechanism
timing
not
consistent.
Among
mechanism,
delayed
because
January–February
at
scales
but
April
scales.
HOS/FOS
June–July
scales,
EOS
August–September
(3)
More
importantly,
SOS,
HOS,
FOS,
were
affected
predrought
its
persistence,
effects
greater
closer
occurred.
(4)
At
monthly
scale,
droughts
January,
June,
August
critical
affecting
HOS/FOS,
EOS,
while
seasonal
February,
June–July,
September
EOS.
this
study
enrich
our
understanding
how
affects
periods,
providing
a
basis
improving
models.
Ecological Indicators,
Год журнала:
2024,
Номер
160, С. 111770 - 111770
Опубликована: Фев. 22, 2024
Drought
events
occur
frequently,
but
the
impact
of
drought
on
plant
autumn
phenology,
i.e.,
End
growing
Season
(EOS),
has
not
been
thoroughly
studied.
Considering
that
cumulative
and
lagged
effects
plants.
In
this
study,
we
quantified
two
EOS
in
China.
Our
results
indicated
affected
39.5%
70.1%
plants
China
over
past
decades.
Two
short
timescales
(2-
to
4-accumulated
month
1-
5-lagged
month)
largely
first
months
advanced
EOS,
while
fifth
before
caused
overcompensate
for
growth
delayed
senescence.
At
biome
level,
forests
were
more
resistant
than
grasslands
shrublands.
From
perspective
water
balance
gradient,
was
significant
humid
regions,
it
found
increased
loss
exacerbated
shortened
response
time.
study
reveals
phenology
provides
insights
into
predicting
future
vegetation
patterns
under
global
change.
Land,
Год журнала:
2025,
Номер
14(4), С. 758 - 758
Опубликована: Апрель 1, 2025
As
a
measure
of
the
accumulated
heat
deficit
during
growing
season
transition,
cooling
degree
days
(CDDs)
play
crucial
role
in
regulating
vegetation
phenology
and
ecosystem
dynamics.
However,
systematic
analyses
CDD
trends
their
driving
mechanisms
remain
limited,
particularly
high-altitude
regions
where
climate
variability
is
pronounced.
This
study
investigated
spatiotemporal
CDDs
from
1982
to
2022
alpine
grasslands
on
Qinghai–Tibetan
Plateau
(TP)
quantified
contributions
key
climatic
factors.
The
results
indicate
that
lower
values
(<350
°C-days)
were
predominantly
found
warm,
arid
regions,
whereas
higher
(>600
concentrated
colder,
wetter
areas.
Temporally,
area-averaged
exhibited
significant
decline,
decreasing
490.9
°C-days
495.8
at
rate
3.8
per
year.
Elevation
plays
critical
shaping
patterns,
displaying
nonlinear
relationship:
decrease
as
elevation
increases
up
4300
m,
beyond
which
they
increase,
suggesting
transition
global
climate-driven
warming
elevations
local
environmental
controls
elevations,
snow–albedo
feedback,
topographic
effects,
atmospheric
circulation
patterns
regulate
temperature
Tmax
was
identified
dominant
driver
variation,
above
while
radiation
showed
consistent
positive
influence
across
elevations.
In
contrast,
precipitation
had
limited
spatially
inconsistent
effect.
These
findings
emphasize
complex
interactions
between
elevation,
temperature,
radiation,
trends.
By
providing
long-term
perspective
variations
drivers,
this
enhances
our
understanding
vegetation–climate
ecosystems.
offer
scientific
basis
for
modeling
late-season
phenological
changes,
resilience,
land-use
planning
under
ongoing
change.
