Physiologia Plantarum,
Год журнала:
2024,
Номер
176(3)
Опубликована: Май 1, 2024
Our
goal
was
to
determine
whether
anthocyanin-producing
species
(red)
use
different
photoprotective
strategies
cope
with
excess
light
during
fall
senescence
compared
non-anthocyanin-producing
(yellow).
In
a
previous
study,
we
found
that
yellow
retained
the
PsbS
protein
in
late
autumn,
while
red
did
not.
Specifically,
tested
hypothesis
make
less
of
zeaxanthin
and
PsbS-mediated
thermal
dissipation,
as
they
rely
on
anthocyanins
for
photoprotection.
We
monitored
four
(Acer
ginnala,
Rhus
typhnia,
Parenthocissus
quinquefolia,
Viburnum
dentatum)
negundo,
Ostrya
virginiana,
Vitis
riparia,
Zanthoxylum
americanum)
throughout
autumn
analyzed
pigments,
content,
chlorophyll
fluorescence.
at
higher
levels,
had
dark
retention
relative
species.
All
lutein
pool
xanthophyll
cycle
pigments
amounts
than
other
carotenoids
autumn.
data
support
strategy
senescence,
therefore
zeaxanthin-mediated
dissipation.
also
species-specific
variation
particular
combination
used.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Янв. 21, 2025
Precipitation
is
an
important
factor
influencing
the
date
of
foliar
senescence,
which
in
turn
affects
carbon
uptake
terrestrial
ecosystems.
However,
temporal
patterns
precipitation
frequency
and
its
impact
on
senescence
remain
largely
unknown.
Using
both
long-term
flux
data
satellite
observations
across
Northern
Hemisphere,
we
show
that,
after
excluding
impacts
from
temperature,
radiation
total
by
partial
correlation
analysis,
declining
may
drive
earlier
1982
to
2022.
A
decrease
intensifies
drought
stress
reducing
root-zone
soil
moisture
increasing
atmospheric
dryness,
limit
photosynthesis
necessary
for
sustained
growth.
The
enhanced
acclimation,
showing
a
more
rapid
response
drought,
also
explains
positive
relationship
between
date.
Finally,
find
30
current
state-of-art
Earth
system
models
fail
capture
sensitivity
DFS
changes
incorrectly
predict
direction
correlations
approximately
half
northern
global
lands,
historical
simulations
future
predictions.
Our
results
therefore
highlight
critical
need
include
frequency,
rather
than
just
precipitation,
into
accurately
forecast
plant
phenology
under
climate
change.
leaf
senescence.
Here,
authors
use
demonstrate
that
reduced
associated
with
faster
trees
don't
precipitation.
Journal of Geophysical Research Biogeosciences,
Год журнала:
2024,
Номер
129(5)
Опубликована: Апрель 27, 2024
Abstract
We
examined
the
seasonality
of
photosynthesis
in
46
evergreen
needleleaf
(evergreen
forests
(ENF))
and
deciduous
broadleaf
(deciduous
(DBF))
across
North
America
Eurasia.
quantified
onset
end
(Start
GPP
End
)
spring
autumn
based
on
response
net
ecosystem
exchange
CO
2
to
sunlight.
To
test
hypothesis
that
snowmelt
is
required
for
begin,
these
were
compared
with
derived
from
soil
temperature.
ENF
achieved
10%
summer
photosynthetic
capacity
∼3
weeks
before
snowmelt,
while
DBF
∼4
afterward.
increased
faster
(1.95%
d
−1
than
(1.10%
),
their
active
season
length
(End
–Start
was
∼50
days
shorter.
hypothesized
warming
has
influenced
timing
season.
found
minimal
evidence
long‐term
change
Start
,
or
air
temperature,
but
interannual
anomalies
significantly
correlated.
Warmer
weather
associated
earlier
(1.3–2.5
°C
later
(1.5–1.8
depending
forest
type
month).
Finally,
we
tested
whether
existing
phenological
models
could
predict
.
For
forests,
temperature‐
daylength‐based
provided
best
predictions
a
chilling‐degree‐day
model
The
root
mean
square
errors
(RMSE)
between
predicted
observed
11.7
11.3
days,
respectively.
yielded
results
(RMSE
6.3
10.5
days).
Global Change Biology,
Год журнала:
2025,
Номер
31(1)
Опубликована: Янв. 1, 2025
ABSTRACT
The
carbon
sink
function
performed
by
the
different
vegetation
types
along
environmental
gradient
in
coastal
zones
plays
a
vital
role
mitigating
climate
change.
However,
inadequate
understanding
of
its
spatiotemporal
variations
across
and
associated
regulatory
mechanisms
hampers
determining
potential
shifts
changing
climate.
Here,
we
present
long‐term
(2011–2022)
eddy
covariance
measurements
net
ecosystem
exchange
(NEE)
CO
2
at
three
sites
with
(tidal
wetland,
nontidal
cropland)
zone
to
examine
type
on
annual
strength.
We
found
that
study
are
stable
sinks
influenced
their
distinct
physiological
phenological
factors.
NEE
tidal
cropland
were
determined
predominantly
seasonal
peaks
uptake,
release,
duration
uptake
period.
Furthermore,
changes
sensitive
climatic
variables,
as
spring
mean
air
temperature
reduced
strength
maximum
daily
precipitation
summer
it
global
radiation
elicited
same
effect
cropland.
Finally,
worldwide
database
was
compiled,
using
which
further
validated
consistency
biological
controls.
Overall,
these
results
emphasize
importance
considering
underlying
influence
for
accurate
forecasting
dynamics
under
Вісник Черкаського державного технологічного університету,
Год журнала:
2024,
Номер
29(1), С. 73 - 85
Опубликована: Фев. 17, 2024
Accurate
prediction
of
electricity
generation
from
renewable
sources
is
an
essential
element
to
ensure
the
stability
systems
and
transition
more
sustainable
energy
production.
The
study
aims
optimise
operation
Ukrainian
power
through
introduction
required
share
reliability
system.
To
accuracy
forecasting
by
photovoltaic
plants
in
Ukraine,
data
analysis,
a
review
existing
models
methods,
comparative
analysis
using
satellite
images
meteorological
observations
were
used.
Low
output
feature
sources,
which
explained
random
nature
related
conditions.
In
problem
qualitative
becoming
relevant.
importance
finding
effective
methods
for
Ukraine
has
increased
with
emergence
market.
This
addresses
issue
day
ahead
conditions
As
part
study,
issues
legislation
regarding
requirements
consequences
their
failure
considered.
also
reviewed
modern
explored
new
“forecasting
system
market”
Ukraine.
presents
accepted
metrics
that
allow
estimating
errors
comparing
effectiveness
different
methods.
Considering
dependence
on
parameters,
was
carried
out.
will
determine
material
presented
determining
model
generation,
thus
increasing
efficiency
companies
reduce
negative
impact
sector
environment
contribute
efficient
stable
future
