Abstract
Background
Leaf
stomatal
conductance
is
an
important
indicator
of
photosynthetic
capacity.
However,
poorly
quantified
and
rarely
explored
in
the
context
leaf
functional
traits
for
epiphytes,
particularly
when
it
comes
to
herbaceous
species
with
different
habits
(deciduous
vs.
deciduous
species).
Here,
we
investigated
conductance,
dry
mass
per
unit
area,
thickness,
density,
abaxial
epidermal
cell
size
pigment
contents
23
Dendrobium
evergreen
from
a
greenhouse.
Our
main
objectives
were
compare
differences
all
measured
between
species,
determine
relationships
pigments.
Results
The
results
showed
that
had
thicker
leaves
higher
whereas
chlorophyll
contents.
negative
correlation
but
positive
There
was
area.
Conclusion
reveal
clear
pigments
form
groups
showing
trait
values
indicative
less
investments
structural
components
more
carbon
gain.
Furthermore,
area
play
role
shaping
conductance.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Июль 4, 2023
Abstract
Fundamental
axes
of
variation
in
plant
traits
result
from
trade-offs
between
costs
and
benefits
resource-use
strategies
at
the
leaf
scale.
However,
it
is
unclear
whether
similar
propagate
to
ecosystem
level.
Here,
we
test
trait
correlation
patterns
predicted
by
three
well-known
leaf-
plant-level
coordination
theories
–
economics
spectrum,
global
spectrum
form
function,
least-cost
hypothesis
are
also
observed
community
mean
processes.
We
combined
functional
properties
FLUXNET
sites,
vegetation
properties,
into
corresponding
principal
component
analyses.
find
that
(90
sites),
function
(89
(82
sites)
all
evidence
additional
scale-emergent
properties.
Evaluating
may
aid
development
more
realistic
dynamic
models
with
critical
empirical
data,
reducing
uncertainty
climate
change
projections.
Frontiers in Ecology and Evolution,
Год журнала:
2020,
Номер
8
Опубликована: Июнь 16, 2020
Ecosystem
surveillance
monitoring
is
critical
to
managing
natural
resources
and
especially
so
under
changing
environments.
Despite
this
importance,
the
design
implementation
of
programs
across
large
temporal
spatial
scales
has
been
hampered
by
lack
appropriately
standardised
methods
data
streams.
To
address
gap,
we
outline
a
method
based
on
permanent
plots
voucher
samples
suited
rangeland
environments
around
world
that
repeatable,
cost-effective,
appropriate
for
large-scale
comparisons
adaptable
other
global
biomes.
The
provides
comprehensive
vegetation
composition
structure
along
with
soil
attributes
relevant
plant
growth,
delivered
as
combination
modules
can
be
targeted
different
purposes
or
available
resources.
Plots
are
located
in
stratified
units,
landforms
climates
enhance
continental
comparisons.
Changes
investigated
through
revisits.
Vegetation
measured
inform
composition,
cover
structure.
Samples
soils
collected
tracked
barcode
labels
stored
long-term
subsequent
analysis.
Technology
used
accuracy
field
methods,
including
differential
GPS
r
plot
locations,
instrument
Leaf
Area
Index
(LAI)
measures,
three
dimensional
photo-panoramas
advanced
A
key
feature
use
electronic
collection
delivery
into
publicly-accessible
database.
Our
pragmatic,
whilst
still
providing
consistent
data,
information
attributes.
operational
applied
at
more
than
704
locations
Australian
rangelands
part
Surveillance
program
Terrestrial
Research
Network
(TERN).
methodology
enables
analyses,
tested
communities
broadly
representative
globally,
components
being
applicable
Here
also
recommend
consultative
process
guiding
principles
drove
development
an
approach
consistent,
objective
continental,
potentially
analyses
were
not
previously
possible
disparate
datasets.
Scientific Reports,
Год журнала:
2021,
Номер
11(1)
Опубликована: Май 11, 2021
Abstract
Screening
species-rich
communities
for
the
variation
in
functional
traits
along
environmental
gradients
may
help
understanding
abiotic
drivers
of
plant
performance
a
mechanistic
way.
We
investigated
tree
leaf
trait
an
elevation
gradient
(1000–3000
m)
highly
diverse
neotropical
montane
forests
to
test
hypothesis
that
elevational
change
reflects
trend
toward
more
conservative
resource
use
strategies
at
higher
elevations,
with
interspecific
decreasing
and
integration
increasing
due
filtering.
Analysis
variance
partitioning
across
52
species
revealed
most
dominant
influence
phylogeny,
except
SLA,
thickness
foliar
Ca,
where
was
influential.
The
community-level
means
N
N/P
ratio
decreased
elevation,
while
toughness
increased.
contribution
intraspecific
substantial
community
level
traits,
yet
smaller
than
component.
Both
within-species
between-species
did
not
systematically
elevation.
High
phylogenetic
diversity,
together
small-scale
edaphic
heterogeneity,
cause
large
these
hyper-diverse
Andean
forests.
Trait
network
analysis
suggesting
stronger
filtering
colder
nutrient-poorer
sites.
New Phytologist,
Год журнала:
2021,
Номер
232(3), С. 1286 - 1296
Опубликована: Июль 29, 2021
Close
coupling
between
water
loss
and
carbon
dioxide
uptake
requires
coordination
of
plant
hydraulics
photosynthesis.
However,
there
is
still
limited
information
on
the
quantitative
relationships
hydraulic
photosynthetic
traits.
We
propose
a
basis
for
these
based
optimality
theory,
test
its
predictions
by
analysis
measurements
107
species
from
11
sites,
distributed
along
nearly
3000-m
elevation
gradient.
Hydraulic
leaf
economic
traits
were
less
plastic,
more
closely
associated
with
phylogeny,
than
The
two
sets
linked
sapwood
to
area
ratio
(Huber
value,
v
Journal of Advances in Modeling Earth Systems,
Год журнала:
2021,
Номер
14(1)
Опубликована: Дек. 6, 2021
Abstract
Vegetation
regulates
land‐atmosphere,
water,
and
energy
exchanges
is
an
essential
component
of
land‐surface
models
(LSMs).
However,
LSMs
have
been
handicapped
by
assumptions
that
equate
acclimated
photosynthetic
responses
to
the
environment
with
fast
observable
in
laboratory.
The
effects
acclimation
can
be
taken
into
account
including
PFT‐specific
values
parameters,
but
at
cost
increasing
parameter
requirements.
Here,
we
develop
alternative
approach
for
adopting
P
model,
existing
light‐use
efficiency
model
gross
primary
production
(GPP)
implicitly
predicts
parameters
on
a
weekly
monthly
timescale
via
optimality
principles.
We
demonstrate
it
possible
explicitly
separate
slow
environmental
conditions,
allowing
simulation
GPP
sub‐daily
timesteps
required
coupling
LSM.
resulting
reproduces
diurnal
cycles
recorded
eddy‐covariance
flux
towers
temperate
grassland
boreal,
tropical
forests.
best
performance
achieved
when
biochemical
capacities
are
adjusted
match
recent
midday
conditions.
Comparison
between
this
operational
LSM
European
Centre
Medium‐range
Weather
Forecasts
climate
shows
new
has
better
predictive
power
most
sites
years
analyzed,
particularly
summer
autumn.
Our
analyses
suggest
simple
parameter‐sparse
method
include
both
instantaneous
within
framework,
potential
applications
weather,
climate,
carbon‐cycle
modeling.
New Phytologist,
Год журнала:
2022,
Номер
235(3), С. 923 - 938
Опубликована: Май 5, 2022
Concurrent
measurement
of
multiple
foliar
traits
to
assess
the
full
range
trade-offs
among
and
within
taxa
across
broad
environmental
gradients
is
limited.
Leaf
spectroscopy
can
quantify
a
wide
functional
traits,
enabling
assessment
interrelationships
with
environment.
We
analyzed
leaf
trait
measurements
from
32
sites
along
eco-climatic
gradient
encompassed
by
US
National
Ecological
Observatory
Network
(NEON).
explored
relationships
14
1103
individuals
species,
factors.
Across
all
species
pooled,
between
economic
(leaf
mass
per
area,
nitrogen)
indicative
defense
stress
tolerance
(phenolics,
nonstructural
carbohydrates)
were
weak,
but
became
strong
certain
species.
Elevation,
mean
annual
temperature
precipitation
weakly
predicted
variation
although
some
exhibited
species-specific
significant
Foliar
vary
idiosyncratically
express
diverse
combinations
achieve
fitness.
offers
an
effective
approach
intra-species
covariation,
potentially
could
be
used
improve
characterization
vegetation
in
Earth
system
models.
Journal of Experimental Botany,
Год журнала:
2023,
Номер
74(17), С. 5166 - 5180
Опубликована: Май 26, 2023
Abstract
The
connection
between
soil
nitrogen
availability,
leaf
nitrogen,
and
photosynthetic
capacity
is
not
perfectly
understood.
Because
these
three
components
tend
to
be
positively
related
over
large
spatial
scales,
some
posit
that
drives
which
capacity.
Alternatively,
others
primarily
driven
by
above-ground
conditions.
Here,
we
examined
the
physiological
responses
of
a
non-nitrogen-fixing
plant
(Gossypium
hirsutum)
nitrogen-fixing
(Glycine
max)
in
fully
factorial
combination
light
availability
help
reconcile
competing
hypotheses.
Soil
stimulated
both
species,
but
relative
proportion
used
for
processes
was
reduced
under
elevated
all
treatments
due
greater
increases
content
than
chlorophyll
biochemical
process
rates.
Leaf
rates
G.
hirsutum
were
more
responsive
changes
those
max,
probably
strong
max
investments
root
nodulation
low
nitrogen.
Nonetheless,
whole-plant
growth
significantly
enhanced
increased
species.
Light
consistently
allocation
photosynthesis
growth,
pattern
similar
These
results
suggest
nitrogen–photosynthesis
relationship
varies
different
levels
species
preferentially
allocated
non-photosynthetic
processes,
rather
photosynthesis,
as
increased.
New Phytologist,
Год журнала:
2023,
Номер
241(4), С. 1447 - 1463
Опубликована: Ноя. 20, 2023
Summary
The
threat
of
rising
global
temperatures
may
be
especially
pronounced
for
low‐latitude,
lowland
plant
species
that
have
evolved
under
stable
climatic
conditions.
However,
little
is
known
about
how
these
acclimate
to
elevated
temperatures.
Here,
we
leveraged
a
strong,
steep
thermal
gradient
along
natural
geothermal
river
assess
the
ability
woody
plants
in
Amazon
air
We
measured
leaf
traits
six
common
tropical
investigate
whether
individuals
species:
their
thermoregulatory
maintain
despite
higher
ambient
temperatures;
photosynthetic
tolerances
withstand
hotter
and
acclimation
sufficient
safety
margins
(TSMs)
across
different
growth
Individuals
three
acclimated
traits,
increased
with
temperature.
was
generally
insufficient
constant
TSMs.
Notwithstanding,
health
consistent
Acclimation
Amazonian
too
weak
TSMs
at
high
temperatures,
supporting
previous
findings
will
increasingly
vulnerable
stress
as
rise.