Authorea (Authorea),
Год журнала:
2023,
Номер
unknown
Опубликована: Ноя. 15, 2023
Cryogenic
vacuum
distillation
(CVD)
is
a
widely
used
technique
for
extracting
plant
water
from
stems
isotopic
analysis,
but
concerns
about
potential
biases
have
emerged.
Here,
we
leverage
the
Cavitron
centrifugation
to
extract
xylem
and
compare
its
signature
that
of
CVD-extracted
stem
as
well
source
water.
Conducted
under
field
conditions
in
tropical
northern
Australia,
our
study
spans
seven
tree
species
naturally
experiencing
range
stress
levels.
Our
findings
reveal
significant
deuterium
bias
bulk
when
compared
(median
-14.9‰),
whereas
closely
aligned
with
offset
-1.9‰).
We
find
substantial
variations
among
(bias
ranging
-19.3
-9.1‰),
intriguingly,
CVD-induced
were
unrelated
environmental
factors
such
relative
content
pre-dawn
leaf
potential.
These
results
imply
inter-specific
differences
may
be
driven
by
anatomical
traits
rather
than
hydraulic
functioning.
Additionally,
data
highlight
use
site-specific
offset,
based
on
local
water,
correcting
biases.
Wiley Interdisciplinary Reviews Water,
Год журнала:
2024,
Номер
11(4)
Опубликована: Март 5, 2024
Abstract
The
analysis
of
the
stable
isotopic
composition
hydrogen
and
oxygen
in
water
samples
from
soils
plants
can
help
to
identify
sources
vegetation
uptake.
This
approach
requires
that
heterogeneous
nature
plant
soil
matrices
is
carefully
accounted
for
during
experimental
design,
sample
collection,
extraction
analyses.
comparability
shortcomings
different
methods
extracting
analyzing
have
been
discussed
specialized
literature.
Yet,
despite
insightful
comparisons
benchmarking
methodologies
laboratories
worldwide,
community
still
lacks
a
roadmap
guide
extraction,
analyses,
many
practical
issues
potential
users
remain
unresolved:
example,
which
(soil
or
plant)
pool(s)
does
extracted
represent?
These
constitute
hurdle
implementation
by
newcomers.
Here,
we
summarize
discussions
led
framework
COST
Action
WATSON
(“WATer
isotopeS
critical
zONe:
groundwater
recharge
transpiration”—CA19120).
We
provide
guidelines
(1)
sampling
material
analysis,
(2)
laboratory
situ
(3)
measurements
composition.
highlight
importance
considering
process
chain
as
whole,
design
minimize
biased
estimates
relative
contribution
conclude
acknowledging
some
limitations
this
methodology
advice
on
collection
key
environmental
parameters
prior
article
categorized
under:
Science
Water
>
Hydrological
Processes
Environmental
Change
Extremes
Water Resources Research,
Год журнала:
2025,
Номер
61(2)
Опубликована: Фев. 1, 2025
Abstract
The
spatial
variation
of
soil
water
isotopes
(SWI)—representing
the
baseline
for
investigating
root
uptake
(RWU)
depths
with
stable
isotope
techniques—has
rarely
been
investigated.
Here,
we
use
SWI
depth
profile
sampling
in
combination
unmanned
aerial
vehicle
(UAV)
based
land
surface
temperature
estimates
and
vegetation
indices
(VI)
order
to
improving
process
understanding
relationships
between
variability
content
patterns
canopy
status,
represented
form
VI.
We
carried
out
a
10
profiles
tropical
dry
forest.
UAV
data
were
collected
analyzed
obtain
detailed
characterization
status.
then
performed
statistical
analysis
VI
temperatures
values
at
different
resolutions
(3
cm–5
m).
Best
used
generating
isoscapes
entire
study
area.
Results
suggest
that
are
strongly
mediated
by
parameters
(VI).
Various
correlate
across
all
depths.
depend
on
(
R
2
0.66
δ
18
O
0.64
H).
Strongest
overall
correlations
found
resolution
0.5
m.
speculate
this
might
be
ideal
spatially
characterizing
investigate
RWU
forest
environments.
Supporting
analyses
UAV‐based
approaches
future
avenue
representation
credibility
such
studies.
Hydrological Processes,
Год журнала:
2024,
Номер
38(2)
Опубликована: Фев. 1, 2024
Abstract
Realistic
projections
of
the
future
climate
and
how
this
translates
to
water
availability
is
crucial
for
sustainable
resource
management.
However,
data
constrains
capacity
simulate
streamflow
corresponding
hydrological
processes.
Developing
more
robust
models
methods
that
can
circumvent
need
large
amounts
hydro‐climatic
support
water‐related
decisions,
particularly
in
developing
countries.
In
study,
we
use
natural
isotope
tracers
addition
hydro‐climate
within
a
newly
developed
version
spatially‐distributed
J2000iso
as
an
isotope‐enabled
rainfall‐runoff
model
simulating
both
stable
(δ
2
H)
fluxes.
We
pilot
humid
tropical
San
Carlos
catchment
(2500
km
)
northeastern
Costa
Rica,
which
has
limited
time
series,
but
spatially
distributed
data.
The
added
benefit
isotopes
was
assessed
by
comparing
different
observation
using
three
calibration
strategies
(i)
gauges,
(ii)
gauges
with
stream
(iii)
only.
achieved
Kling–Gupta
efficiency
(KGE)
0.55–0.70
across
all
differences
process
simulations
emerged
when
including
calibration.
Hydrological
simulation
varied
between
standard
J2000
high
simulated
surface
runoff
proportion
37%
opposed
84%–89%
baseflow
or
interflow.
solutions
used
only
exhibited
interflow,
performance
captured
bulk
balances
reasonable
match
observed
hydrographs.
conclude
shown
potential
balance
modelling
ungauged
catchments
isotope,
satellite
global
reanalysis
sets.
Hydrological Processes,
Год журнала:
2024,
Номер
38(2)
Опубликована: Фев. 1, 2024
Abstract
Cryogenic
vacuum
distillation
(CVD)
is
a
widely
used
technique
for
extracting
plant
water
from
stems
isotopic
analysis,
but
concerns
about
potential
biases
have
emerged.
Here,
we
leverage
the
Cavitron
centrifugation
to
extract
xylem
and
compare
its
signature
that
of
CVD‐extracted
bulk
stem
as
well
source
water.
Conducted
under
field
conditions
in
tropical
northern
Australia,
our
study
spans
seven
tree
species
naturally
experiencing
range
stress
levels.
Our
findings
reveal
significant
deuterium
bias
when
compared
(median
−14.9‰),
whereas
closely
aligned
with
offset
−1.9‰).
We
find
substantial
variations
among
(bias
ranging
−19.3‰
−9.1‰),
intriguingly,
CVD‐induced
were
unrelated
environmental
factors
such
relative
content
predawn
leaf
potential.
These
results
imply
inter‐specific
differences
may
be
driven
by
anatomical
traits
rather
than
hydraulic
functioning.
Additionally,
data
highlight
use
site‐specific
offset,
based
on
local
water,
correcting
biases.
PLOS Water,
Год журнала:
2023,
Номер
2(10), С. e0000136 - e0000136
Опубликована: Окт. 11, 2023
Mexico
encompasses
a
large
spectrum
of
landscapes
with
topographic,
geographic,
and
climatic
factors
interacting
in
complex
ecohydrological
setting.
For
decades,
isotope
hydrogeological
tools
have
been
applied
using
short-term
or
seasonal
local
meteoric
water
lines
as
valid
input
functions.
Yet,
systematic
evaluation
characteristics
is
still
lacking.
Here
we
report
on
the
spatial
temporal
variations
21
precipitation
monitoring
stations
across
Mexico.
Our
database
includes
608
monthly
samples
collected
from
2018
to
2021
over
four
regions
(between
5
2,365
m
asl):
Pacific
coast,
Gulf
Mexico/Caribbean
Sea
region,
Central
Northern
plateaus.
Precipitation
δ
18
O
seasonality
dry
(winter)
wet
season
(summer)
was
characterized
by
notable
W-shaped
variability.
Monthly
amounts
compositions
exhibited
poor
strong
linear
regressions
(
Adj
.
r
2
<0.01
0.75),
inverse
(positive)
relationships
northern
monsoon-affected
region.
Low
d
-excess
(5.1
9.7‰)
corresponded
greater
terrestrial
moisture
contributions
(20.5%)
arid
regions.
Moisture
inputs
Ocean
were
associated
near-equilibrium
values
(8.8
14.3‰),
respectively.
The
best-fit
models
for
=
0.85)
H
0.88)
determined
topographic
geographical
predictors,
resulting
an
updated
high-resolution
isoscape
(100
grid)
Orographic
barriers
(-2.10‰
O/km)
coupled
interaction
tropical
cyclones
cold
fronts,
evolution
North
American
Monsoon
system,
passage
easterly
trade
winds
play
remarkable
role
controlling
rainfall
findings
provide
robust
baseline
ecohydrological,
climatic,
forensic,
archeological,
paleoclimate
studies
America.
ABSTRACT
Viticulture
is
an
essential
sector
in
agriculture
as
wine
production
plays
a
vital
role
the
socio‐economic
life
of
many
countries,
especially
Mediterranean
area.
Grapevines
are
valuable,
long‐lived
species
able
to
grow
hot
and
dry
regions.
We
currently
do
not
know
whether
rain‐fed
grapevines
entirely
rely
on
deep
soil
water
or
make
substantial
use
shallow
from
summer
precipitation
events.
Without
knowing
this,
we
poorly
understand
what
fraction
inputs
contributes
grapevine
transpiration.
This
has
implications
for
how
quantify
grapevine‐relevant
budgets
predicting
impacts
climate
change
grape
production.
investigated
vineyard
Chianti
region,
central
Italy.
During
growing
season
2021,
monitored
moisture
at
30‐
60‐cm
depth.
collected
over
250
samples
stable
isotope
analysis
rainfall,
soil,
plants.
Since
traditional
plant
sampling
problematic
grapevines,
shoots,
leaves,
condensed
leaf
transpiration
after
sealed
plastic
bags
were
wrapped
around
shoot.
these
alternative
reconstruct
isotopic
signal
xylem
infer
plant's
seasonal
origin
throughout
season.
The
revealed
that,
season,
received
disproportional
contributions
by
rain
that
had
fallen
winter,
even
when
compensating
Only
late
did
amounts
whose
contribution
occasionally
became
dominant.
These
results
provide
better
understanding
ecohydrological
interactions
uptake
dynamics
valuable
agroecosystems
such
vineyards.
EarthArXiv (California Digital Library),
Год журнала:
2023,
Номер
unknown
Опубликована: Май 4, 2023
Mexico
encompasses
a
large
spectrum
of
landscapes
with
topographic,
geographic,
and
climatic
factors
interacting
in
complex
ecohydrological
setting.
For
decades,
isotope
hydrogeological
tools
have
been
applied
using
short-term
or
seasonal
local
meteoric
water
lines
as
valid
input
functions.
Yet,
systematic
evaluation
characteristics
is
still
lacking.
Here
we
report
on
the
spatial
temporal
variations
21
precipitation
monitoring
stations
across
Mexico.
Our
database
includes
608
monthly
samples
collected
from
2018
to
2021
over
four
regions
(between
5
2,365
m
asl):
Pacific
coast,
Gulf
Mexico/Caribbean
Sea
region,
Central
Northern
Plateaus.
Precipitation
δ18O
seasonality
dry
(winter)
wet
season
(summer)
was
characterized
by
notable
W-shaped
variability.
Monthly
amounts
compositions
exhibited
poor
strong
linear
regressions
(Adj.
r20.01
0.75),
inverse
(positive)
relationships
northern
monsoon-affected
region.
Low
d-excess
(5.1
9.7‰)
corresponded
greater
terrestrial
moisture
contributions
(20.5%)
arid
regions.
Moisture
inputs
Ocean
were
associated
near-equilibrium
values
(8.8
14.3‰),
respectively.
The
best-fit
models
for
r2=0.85)
δ2H
r2=0.88)
determined
topographic
geographical
predictors,
resulting
an
updated
high-resolution
isoscape
(100
m2
grid)
Orographic
barriers
(-2.10‰
δ18O/km)
coupled
interaction
tropical
cyclones
cold
fronts,
evolution
North
American
Monsoon
system,
passage
easterly
trade
winds
play
remarkable
role
controlling
rainfall
findings
provide
robust
baseline
ecohydrological,
climatic,
forensic,
archeological,
paleoclimate
studies
America.
