Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(24), P. 4733 - 4733
Published: Dec. 18, 2024
Greening
dryland
ecosystems
greatly
benefits
from
significant
CO2
fertilization.
This
greening
trend
across
global
drylands,
however,
has
also
been
severely
constrained
by
enhancing
atmospheric
and
soil
water
(SW)
deficits.
Thus
far,
the
relative
offsets
in
contributions
between
vapor
pressure
deficit
(VPD),
SW
at
varying
depths,
fertilization
to
vegetation
dynamics,
as
well
differences
impacts
of
decreasing
different
depths
on
over
long
periods,
remain
poorly
recorded.
Here,
this
study
comprehensively
explored
dynamics
high
VPD,
low
SW,
rising
concentration
drylands
during
1982–2018
using
process-based
models
satellite-observed
Leaf
Area
Index
(LAI),
Gross
Primary
Productivity
(GPP),
solar-induced
chlorophyll
fluorescence
(SIF).
Results
revealed
that
decreasing-SW-induced
reductions
LAI
were
larger
than
those
caused
VPD.
Furthermore,
was
more
subsurface
(7–28
cm)
among
various
layers.
Notable
found
enhanced
constraints
fertilization,
with
former
offsetting
approximately
38.49%
beneficial
effects
latter
changes
drylands.
Process-based
supported
finding
increasing
failed
overwhelmingly
offset
ecosystems.
work
emphasizes
impact
highlights
far-reaching
importance
despite
constraints.
Deleted Journal,
Journal Year:
2025,
Volume and Issue:
7(1)
Published: Jan. 10, 2025
Abiotic
stresses,
particularly
drought,
pose
a
significant
threat
to
global
agriculture
and
affect
crop
yield
quality.
Plant
Growth-Promoting
Rhizobacteria
(PGPR)
have
emerged
as
promising
solution
for
mitigating
these
stresses
enhancing
plant
resilience.
This
review
explores
the
role
of
PGPR
in
alleviating
abiotic
stress
with
special
focus
on
drought.
contribute
tolerance
through
various
mechanisms,
including
production
phytohormones,
such
indole-3-acetic
acid,
enhancement
nutrient
uptake,
modulation
responses.
These
bacteria
can
improve
soil
structure,
increase
water
retention,
promote
synthesis
osmoprotectants,
which
helps
plants
withstand
drought
conditions.
examines
recent
advancements
our
understanding
molecular
physiological
interactions
between
under
stress.
highlights
how
genetic
modifications
synthetic
biology
be
leveraged
enhance
efficacy.
Furthermore,
integration
other
technologies,
nanotechnology
biostimulants,
has
been
discussed
means
improving
resistance
crops.
Challenges
deploying
PGPR,
variability
strain
effectiveness
field
application
strategies,
were
also
addressed.
By
synthesizing
current
knowledge
identifying
future
research
directions,
this
aims
provide
comprehensive
overview
employed
combat
support
sustainable
agriculture.
findings
emphasize
potential
key
component
integrated
management
offering
pathway
resilience
ensuring
food
security
face
climate
change.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(18), P. 8125 - 8125
Published: Sept. 18, 2024
Agricultural
droughts
in
South
Africa,
particularly
the
Amahlathi
Local
Municipality
(ALM),
significantly
impact
socioeconomic
activities,
sustainable
livelihoods,
and
ecosystem
services,
necessitating
urgent
attention
to
improved
resilience
food
security.
The
study
assessed
interdecadal
drought
severity
duration
Amahlathi’s
agricultural
potential
zone
from
1989
2019
using
various
vegetation
indicators.
Landsat
time
series
data
were
used
analyse
land
surface
temperature
(LST),
soil-adjusted
index
(SAVI),
normalized
difference
(NDVI),
standardized
precipitation
(SPI).
utilised
GIS-based
weighted
overlay,
multiple
linear
regression
models,
Pearson’s
correlation
analysis
assess
correlations
between
LST,
NDVI,
SAVI,
SPI
response
extent.
results
reveal
a
consistent
negative
LST
NDVI
ALM,
with
an
increase
(R2
=
0.9889)
temperature.
accuracy
dry
areas
increased
55.8%
2019,
despite
dense
high
average
of
40.12
°C,
impacting
water
availability,
land,
local
ecosystems.
shows
ALM
increasing
since
2019.
SAVI
indicates
slight
improvement
overall
health
0.18
0.25
2009,
but
decrease
0.21
at
12
24
months
that
severely
impacted
cover
2014
notable
recovery
during
wet
periods
1993,
2000,
2003,
2006,
2008,
2013,
possibly
due
temporary
relief.
findings
can
guide
provincial
monitoring
early
warning
programs,
enhancing
resilience,
productivity,
especially
farming
communities.
Water Resources Research,
Journal Year:
2025,
Volume and Issue:
61(3)
Published: Feb. 28, 2025
Abstract
Artificial
lakes
(reservoirs)
accumulate
sediment
and
organic
carbon
(OC)
over
time.
We
investigated
sedimentation
processes
in
a
dryland
reservoir
informed
OC
burial
potential
preservation.
Our
study
site,
Elephant
Butte
Reservoir
on
the
Rio
Grande,
New
Mexico,
USA
receives
inflows
from
sediment‐laden,
monsoon‐driven
flash
floods.
Using
field
data,
historical
survey
river
flux
(water,
sediment,
OC)
we
estimated
volumes
rates
within
delta,
bottom,
whole
during
wet
(1980–1988)
dry
(2007–2017/2019)
climate
periods.
During
severe
drought
(2021–2022),
measured
suspended
concentrations
for
characteristic
(seasonal)
phases
of
hydrograph,
monitored
delta
patterns,
observed
outflow
plume
dynamics.
Measured
(mean
=
8,818
mg/l,
median
1,769
mg/l)
frequently
surpassed
hyperpycnal
threshold
(1,000
mg/l),
especially
floods
(maximum
46,718
mg/l).
River
total
content
averaged
5.2%
±
12.2%,
increasing
to
6.3%
10.3%
summer.
Whole
linear
3.1
1.4%
(dry)–4.0
4.2%
(wet)
cm/yr,
with
higher
bottom
(5.0
0.3%
cm/yr)
than
(0.8
1.1%
deposition,
potentially
preserving
OC.
Comparisons
suspension
deposited
indicate
partial
Estimated
is
conditions
(391
43.6%
vs.
82.4
56.4%
g
C/m
2
yr),
suggesting
that
reservoirs
may
be
efficient
sinks
these
