Abstract.
Plants
absorb
nutrients
and
water
through
their
roots,
modulate
soil
biogeochemical
cycles.
The
mechanisms
of
nutrient
uptake
by
plants
depend
on
climatic
edaphic
conditions,
as
well
the
plant
root
system.
Soil
solution
is
medium
in
which
abiotic
biotic
processes
exchange
nutrients,
concentrations
vary
with
abundance
reactive
minerals
fluid
residence
times.
High-altitude
ecosystems
tropical
Andes
are
particularly
interesting
to
study
association
between
vegetation
patterns,
hydrology
availability.
páramo
landscape
forms
a
mosaic
bunch-grasses,
cushion-forming
forests.
In
nutrient-depleted
nonallophanic
Andosols,
rooting
depth
varies
drainage
moisture
conditions.
Vegetation
composition
relevant
indicator
rock-derived
availability
solutions.
solute
chemistry
revealed
patterns
available
that
were
not
mimicking
distribution
total
nor
exchangeable
pool,
but
clearly
resulted
from
strong
biocycling
cations
removal
or
deep
leaching.
Our
findings
have
important
implications
for
future
management
Andean
where
type
distributions
dynamically
changing
result
warming
temperatures
anthropogenic
disturbances.
Such
alterations
may
only
lead
changes
geochemistry
also
complex
weathering
rates
export
downstream
effects
rivers
high-mountain
lakes.
Urban Climate,
Journal Year:
2020,
Volume and Issue:
35, P. 100743 - 100743
Published: Dec. 5, 2020
While
both
composition
and
configuration
of
urban
green
spaces
(UGS)
have
been
shown
to
affect
the
cooling
effect
UGS,
more
studies
focused
on
how
land
use
affects
UGS
subsequent
impacts
ability.
We
used
Singapore
fill
this
gap
by
comparing
interrelationships
among
use,
spatial
pattern
between
2005
2015.
Landsat
imageries
Singapore's
Master
Plans
were
produce
surface
temperature
(LST)
maps.
Our
findings
demonstrate
that
almost
all
uses
increased
in
size
lost
vegetation
over
time
showed
LST
as
a
consequence.
results
support
limited
evidence
not
only
composition,
but
influences
their
effect.
In
years,
with
more,
simpler
shape,
less
fragmented,
connected
patches
had
lower
higher
How
each
was
be
dependent
existing
four
major
patterns
identified.
may
help
planners
evaluate
thermal
consequences
proposals.
Hydrological Processes,
Journal Year:
2022,
Volume and Issue:
36(9)
Published: Aug. 11, 2022
Abstract
Soil
hydraulic
properties
control
the
provision
of
hydrological
services.
Vegetation
and
topography
influence
these
by
altering
soil
structure
porosity.
The
underlying
mechanisms
are
not
yet
fully
understood
for
high
Andean
region.
In
this
study,
we
examined
how
vegetation
topographic
attributes
related
to
pore
in
young
volcanic
ash
soils,
further
correlated
them
texture,
organic
carbon,
root
characteristics
explain
relationships.
a
0.7
km
2
study
site
located
páramo
northern
Ecuador,
measured
water
retention,
saturated
conductivity,
bulk
density
(BD),
size
distribution
parameters
on
eight
profiles
with
contrasting
types
(cushion‐forming
plants
vs.
tussock
grasses)
positions
(summit
hillslope).
We
observed
significant
differences
uppermost
horizons
type,
whereas
had
minor
effect.
A
horizons,
found
higher
retention
at
saturation
field
capacity
(10%–14%),
total
available
(8%–15%),
conductivity
(4–12
times)
under
cushion‐forming
compared
grasses.
elevated
values
cushion
were
attributed
presence
larger
pores,
lower
BD,
carbon
content
as
result
coarser
systems.
Total
was
generally
(0.34–0.40
cm
3
−3
),
locally
associated
any
property.
soils
can
enhance
storage
regulation
flows
during
prolonged
rainfall
events.
surface
is
intensities
resulting
infiltration
capacity;
whilst
its
decline
depth
reveals
potential
generation
subsurface
stormflow,
especially
below
plants.
Our
findings
highlight
that
differ
among
types,
show
significance
hydrology.
Hydrological Processes,
Journal Year:
2020,
Volume and Issue:
35(1)
Published: Dec. 16, 2020
Abstract
Accurate
determination
of
the
water
retention
curve
(WRC)
a
soil
is
essential
for
understanding
and
modelling
subsurface
hydrological,
ecological,
biogeochemical
processes.
Volcanic
ash
soils
with
andic
properties
(Andosols)
are
recognized
as
important
providers
ecological
hydrological
services
in
mountainous
regions
worldwide
due
to
their
large
fraction
small
size
particles
(clay,
silt,
organic
matter)
that
gives
them
an
outstanding
holding
capacity.
Previous
comparative
analyses
situ
(field)
standard
laboratory
methods
WRC
Andosols
showed
contrasting
results.
Based
on
extensive
analysis
laboratory,
experimental,
field
measured
WRCs
combination
data
extracted
from
published
literature
we
show
using
sample
volumes
(≤300
cm
3
)
mimic
these
only
partially.
The
results
obtained
by
latter
resemble
portion
wet
range
Andosols'
(from
saturation
up
−5
kPa,
or
pF
1.7),
but
overestimate
substantially
content
higher
matric
potentials.
This
discrepancy
occurs
irrespective
site‐specific
land
use
cover,
properties,
applied
method.
disagreement
limits
our
capacity
infer
correctly
behaviour,
illustrated
through
long‐term
moisture
potential
experimental
site
tropical
Andes.
These
findings
imply
reported
past
research
should
be
used
caution
future
focus
determining
allow
obtaining
correct
characterization
Andosols.
For
latter,
set
recommendations
directions
solve
identified
methodological
issues
proposed.
Ultrasonics,
Journal Year:
2021,
Volume and Issue:
113, P. 106357 - 106357
Published: Jan. 30, 2021
This
study
describes
the
development
and
characterization
of
an
agar-based
soft
tissue-mimicking
material
(TMM)
doped
with
wood
powder
destined
for
fabricating
MRgFUS
applications.
The
main
objective
following
work
was
to
investigate
suitability
as
inexpensive
alternative
in
replacing
other
added
materials
that
have
been
suggested
previous
studies
controlling
ultrasonic
properties
TMMs.
procedure
involved
a
series
experiments
designed
estimate
acoustic
(attenuation
coefficient,
absorption
propagation
speed,
impedance),
thermal
(conductivity,
diffusivity,
specific
heat
capacity),
MR
(T1
T2
relaxation
times)
wood-powder
material.
developed
TMM
(2%
w/v
agar
4%
powder)
expected
demonstrated
compatibility
MRI
scanner
images
artifacts
evaluation.
attenuation
coefficient
proposed
measured
over
frequency
range
1.1–3
MHz
found
be
nearly
proportional
frequency.
0.48
dB/cm
at
1
which
well
within
tissue.
Temperatures
37
°C
proved
increase
marginally
coefficient.
Following
transient
thermoelectric
method,
estimated
0.34
dB/cm-MHz.
speed
(1487
m/s)
tissue
room
temperature,
while
it
significantly
increased
higher
temperature.
possessed
impedance
1.58
MRayl
comparable
corresponding
value
muscle
conductivity
0.51
W/m
K.
times
T1
(844
ms)
(66
were
values
literature
phantom
tested
its
evaluating
protocols.
High
energy
applied,
temperature
change
recorded
using
thermocouples
thermometry.
maps
acquired
single-shot
Echo
Planar
Imaging
(EPI)
gradient
echo
sequence.
matched
adequately
human
tissues
through
experiments,
proven
concentration
enhances
absorption.
Experiments
thermometry
usefulness
this
evaluate
protocols
by
monitoring
peak
temperatures
real-time.
Thermal
lesions
formed
above
dose
observed
high-resolution
visually
dissections
TMM.
Environmental Earth Sciences,
Journal Year:
2025,
Volume and Issue:
84(4)
Published: Feb. 1, 2025
Abstract
Human
pressures
and
global
change
are
threatening
water
resources.
Circumstances
vary
in
each
location;
therefore,
finding
solutions
that
address
local
issues
helps
achieve
comprehensive
management
strategies.
In
the
Andean
basins,
pre-Inca
cultures
used
nature-based
techniques
to
deal
with
dry
seasons.
This
knowledge
these
have
been
recognized
as
a
strategy
increase
security.
Additionally,
they
unconsciously
applied
improve
hydrological
conditions
areas
affected
by
extreme
land-use
changes.
Water
sowing
harvesting
manage
territories
dedicated
livestock
agriculture.
research
evaluates
three
traditional
infiltration
ditch
systems
on
two
types
of
land
use
(páramo
cultivated
pastures)
region
Azuay
(Ecuador).
The
objective
was
establish
potential
for
better
resources
Eosin-traced
diverted
through
channels
or
ditches,
infiltrated
into
soil,
retained
an
average
31
days
páramo
soil
from
90
111
pasture
soil.
Controlled
contributes
effective
retaining
extended
periods.
We
conclude
perform
soils
higher
retention
capacity.
These
suitable
managing
where
changes
reduced
storage
potential.
