Journal of Biogeography,
Journal Year:
2023,
Volume and Issue:
51(1), P. 54 - 56
Published: Sept. 23, 2023
Abstract
Körner
and
Hoch's
(2023)
definition
of
“treeline”
to
include
only
forest
edges
that
are
arctic
or
alpine,
globally
distributed
thermally
limited
is
reconsidered
for
the
with
attention
alpine
treeline
ecotone.
They
characterize
ecotone
as
a
single
phenomenon
at
fundamental
niche
limit,
all
other
montane
realized
limits.
The
framework
restricts
narrow
but
interesting
ecophysiological
questions
leaves
fundamentally
edges,
those
in
disequilibrium
changed
temperature
regime,
extensive
zone
krummholz
tree‐species
seedlings
now
often
referred
ecotone,
without
terminology.
Recognizing
treelines,
if
not
defining
“alpine
treeline”
line
within
broader
ecotone”,
proposed
promote
synergies
research
these
related
systems.
Ecology Letters,
Journal Year:
2023,
Volume and Issue:
26(8), P. 1277 - 1292
Published: June 14, 2023
What
is
addressed
as
growing
season
in
terrestrial
ecosystems
one
of
the
main
determinants
annual
plant
biomass
production
globally.
However,
there
no
well-defined
concept
behind.
Here,
we
show
different
facets
what
might
be
termed
season,
each
with
a
distinct
meaning:
(1)
time
period
during
which
or
part
it
actually
grows
and
produces
new
tissue,
irrespective
net
carbon
gain
(growing
sensu
stricto).
(2)
The
defined
by
developmental,
that
is,
phenological
markers
(phenological
season).
(3)
vegetation
whole
achieves
its
primary
(NPP)
ecosystem
(NEP),
expressed
(productive
season)
(4)
plants
could
potentially
grow
based
on
meteorological
criteria
(meteorological
We
hypothesize
duration
such
'window
opportunity'
strong
predictor
for
NPP
at
global
scale,
especially
forests.
These
definitions
have
implications
understanding
modelling
growth
production.
common
view
variation
phenology
proxy
productivity
misleading,
often
resulting
unfounded
statements
potential
consequences
climatic
warming
sequestration.
Plant Stress,
Journal Year:
2024,
Volume and Issue:
11, P. 100430 - 100430
Published: March 1, 2024
Mountainous
ecosystems
are
experiencing
rapid
shifts
in
distribution
patterns
and
community
structure
due
to
the
impacts
of
climate
change
vegetation
dynamics.
This
study
offers
a
comprehensive
insight
into
adaptive
mechanisms
Panicum
antidotale
varying
elevations
within
Pothohar
Plateau,
shedding
light
on
its
survival
strategies
climate-affected
regions.
The
findings
reveal
that
populations
at
lower
exhibit
maximum
height,
leaf
area,
shoot
length,
fresh
weight,
whereas
those
higher
display
significant
decrease
these
parameters.
Moreover,
decline
species
density,
frequency
cover
is
evident
high
elevation.
High-elevation
demonstrate
decreased
photosynthetic
traits,
including
chlorophyll,
carotenoid,
Na
Ca
content.
Furthermore,
there
notable
variations
antioxidant
enzyme
activity
across
elevation
gradients.
Populations
activities
superoxide
dismutase
peroxidase.
Across
gradient,
were
reductions
root
stem
radius,
sclerenchyma
thickness,
bulliform
cell
size,
metaxylem
vessels,
phloem
area.
moderate
displayed
thicker
lamina
epidermis,
larger
cortical
cells,
wider
xylem
increased
area;
however,
traits
declined
elevations.
showed
extensive
sclerenchyma,
greater
stomatal
density.
Photosynthetic
enzymatic
major
contributors
while
significantly
changed
Overall,
this
research
contributes
broader
knowledge
plant
adaptation
mountainous
stresses
importance
considering
as
critical
factor
ecological
studies.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(4)
Published: April 1, 2024
Abstract
The
impact
of
anthropogenic
global
warming
has
induced
significant
upward
dispersal
trees
to
higher
elevations
at
alpine
treelines.
Assessing
vertical
deviation
from
current
uppermost
tree
distributions
potential
treeline
positions
is
crucial
for
understanding
ecosystem
responses
evolving
climate.
However,
due
data
resolution
constraints
and
research
scale
limitation,
comprehending
the
pattern
driving
factors
remains
challenging.
This
study
constructed
a
comprehensive
quasi‐observational
dataset
distribution
across
mountains
using
Google
Earth
imagery.
Validating
isotherm
mean
growing‐season
air
temperature
6.6
±
0.3°C
as
indicator
thermal
treeline,
we
found
that
around
two‐thirds
records
significantly
deviated
it.
Drought
conditions
constitute
primary
driver
in
51%
cases,
followed
by
mountain
elevation
effect
which
indicates
surface
heat
(27%).
Our
analyses
underscore
multifaceted
determinants
patterns
explaining
divergent
climate
warming.
Moisture,
along
with
disturbance,
plays
most
fundamental
roles
variation
forecasting
response
ongoing
Plants,
Journal Year:
2023,
Volume and Issue:
12(14), P. 2666 - 2666
Published: July 17, 2023
The
alpine
life
zone
is
perhaps
the
only
biome
that
occurs
globally
where
mountains
are
high
enough.
At
latitudinally
varying
elevation,
belt
hosts
small
stature
plants
vary
greatly
in
morphology,
anatomy
and
physiology.
In
this
contribution,
I
summarize
a
number
of
principles
govern
what
often
considered
cold
hostile
environment.
12
conceptual
frameworks
depicted
include
key
role
aerodynamic
decoupling
from
free
atmospheric
climatic
conditions,
problematic
concepts
limitation
stress
an
evolutionary
context,
developmental
flexibility
functional
diversity.
With
its
topography
driven
habitat
diversity,
plant
diversity
buffered
against
environmental
change,
multitude
microclimatic
gradients
offers
‘experiments
by
nature’,
power
which
awaits
multidisciplinary
exploration.
Ecology Letters,
Journal Year:
2025,
Volume and Issue:
28(1)
Published: Jan. 1, 2025
ABSTRACT
Trees
affect
organic
matter
decomposition
through
allocation
of
recently
fixed
carbon
belowground,
but
the
magnitude
and
direction
this
effect
may
depend
on
substrate
type
stage.
Here,
we
followed
mass
loss,
chemical
composition
fungal
colonisation
leaf
root
litters
incubated
in
mountain
birch
forests
over
4
years,
plots
where
belowground
was
severed
by
tree
girdling
or
control
plots.
Initially,
stimulated
litter
loss
12%
22%,
respectively,
suggesting
competitive
release
saprotrophic
when
tree‐mediated
competition
ectomycorrhizal
fungi
eliminated
(Gadgil
effect).
After
instead
hampered
30%,
late‐stage
priming
presence
trees,
parallel
with
increased
growth
shrubs
associated
following
elimination.
Hence,
different
mechanisms
driving
early‐
should
be
considered
climate‐feedback
evaluations
plant–soil
interactions.
New Zealand journal of forestry science,
Journal Year:
2025,
Volume and Issue:
55
Published: Feb. 13, 2025
Background:
Polylepis
tarapacana
(queñoa)
is
a
species
that
grow
from
forests
to
shrublands
in
Chile,
Argentina,
Bolivia
and
Peru,
reaching
an
elevation
range
of
4400-5000
m
a.s.l.
In
this
occurred
the
Altoandina
phyto-geographic
eco-region,
which
presents
scarce
vegetation,
where
it
most
important
tree
for
its
great
socio-economic
importance.
The
structure
these
communities
changes
related
environmental
gradients
are
not
well
described
literature.
objective
was
relate
topographic
factors
with
variables
P.
communities,
evaluating
occupation
degree
(e.g.
density
crown
cover)
species.
Methods:
We
studied
northern
sampling
98
plots
(50–4000
m²)
measure
diameter
at
base
(DAB-cm),
dominant
height
(DH-cm),
life
forms,
cover
(CC-%),
(DEN-n
ha-1).
Topographic
(elevation,
slope,
aspect)
substrate
type
were
also
recorded.
Generalized
Linear
Models
(GLM)
used
assess
influence
topography
on
forest
structure,
univariate
analyses
evaluate
structural
across
forms
topography.
Results:
Great
heterogeneity
observed
open
or
patches
tarapacana,
high
elevations
(<4500
a.s.l.),
gentle
slopes
(21°)
north
aspect
(95%
plots).
vegetation
variables,
e.g:
has
significant
positive
effect
DH
(β
=
0.105,
p
0.011),
while
slope
-0.144,
0.001)
eastern
-0.083,
0.040)
have
negative
effects
(F=6.85,
<0.001).
Slope
only
variable
CC
0.275,
0.001).
influenced
by
gradients,
tallest
(178.2
cm
DH)
found
low
slopes,
mainly
areas
bare
soil
understorey
vegetation.
Conclusions:
associated
gradients.
It
crucial
identify
composition
shrubland,
considering
both
they
develop,
different
adopt.
