What to expect from restored Cerrado grasslands? Indicators and reference values from pristine ecosystems
Restoration Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 20, 2025
Open
ecosystems
are
disappearing
worldwide,
requiring
urgent
restoration
efforts.
However,
limited
knowledge
of
their
structure
and
composition
hinders
the
assessment
success.
We
aimed
to
establish
reference
values
for
plant
community
attributes
in
undisturbed
native
grasslands
guide
restoration.
In
an
unprecedented
data
collection,
we
sampled
14
remnants
under
different
climate,
soil,
fire
regimes,
representing
a
broad
portion
Brazilian
savanna
(except
least
converted
northern).
assessed
composition,
richness
at
scales,
ground
cover
by
functional
groups,
aboveground
biomass.
From
794
species
recorded,
half
were
unique
occurrences,
few
present
over
70%
areas.
Richness
ranged
from
9
22
species/m
2
53
130
30
m
.
Grasses
(22–80%)
non‐grasses
(9–45%)
did
not
entirely,
leaving
4–56%
exposed.
Biomass
57
715
g/m
Because
is
variable,
finding
“reference
set”
whole
Cerrado
possible.
Regional
subsets
key
guilds
recommended
instead.
The
number
good
proxy
diversity,
species/30
total
richness.
unreliable
indicator
due
natural
range
independent
integrity.
maximum
biomass,
however,
should
never
be
surpassed.
Structural
targets
include
grasses,
non‐grasses,
bare
soil
within
range,
but
achieving
pristine
may
unrealistic
most
cases.
Strong
efforts
focus
on
conservation
rather
than
restoration,
once
recovering
all
reference's
difficult.
Language: Английский
Revealing the Impact of Understory Fires on Stem Survival in Five Palm Species (Arecaceae): An Experimental Approach Using Predictive Models
Published: July 1, 2024
Amid
increasing
deforestation,
surface
fires
reaching
the
forest
understory
are
one
of
primary
threats
to
Amazonian
ecosystems.
Despite
extensive
research
on
post-fire
mortality
in
woody
species,
literature
palm
resilience
fire
is
scant.
This
study
investigates
four
palms—Bactris
maraja
Mart.,
Chamaedorea
pauciflora
Geonoma
deversa
(Poit.)
Kunth,
Hyospathe
elegans
and
juvenile
individuals
Euterpe
precatoria
Mart.
Objectives
included:
a)
comparing
responses;
b)
developing
models
based
severity
variables;
c)
evaluating
if
diameter
protects
bud
stems
from
heat
flux.
Conducted
at
edge
an
Ombrophylous
Forest
Alto
Juruá
Acre,
Brazil
(7°45'S,
72°22'W),
experiment
subjected
85
controlled
burning
a
1
m²
area
near
stipe,
with
temperature
sampling
using
K
thermocouples.
Results
showed
varying
rates
among
larger
stipe
correlating
reduced
mortality.
Canopy
patterns
significantly
influenced
mortality,
especially
for
precatoria.
Species
exhibited
diverse
regrowth
capacities,
B.
showing
highest
number
tallest
basal
resprouts.
underscores
plant
as
critical
indicator
severity,
essential
understanding
its
ecological
impacts.
Language: Английский
Revealing the Impact of Understory Fires on Stem Survival in Palms (Arecaceae): An Experimental Approach Using Predictive Models
Fire,
Journal Year:
2024,
Volume and Issue:
8(1), P. 2 - 2
Published: Dec. 24, 2024
Amid
increasing
deforestation,
surface
fires
reaching
the
forest
understory
are
one
of
primary
threats
to
Amazonian
ecosystems.
Despite
extensive
research
on
post-fire
mortality
in
woody
species,
literature
palm
resilience
fire
is
scant.
This
study
investigates
four
palms,
namely
Bactris
maraja
Mart.,
Chamaedorea
pauciflora
Geonoma
deversa
(Poit.)
Kunth,
Hyospathe
elegans
and
juvenile
individuals
Euterpe
precatoria
Mart.
(açaí
palm).
The
objectives
included
(a)
comparing
responses;
(b)
developing
models
based
severity
variables;
(c)
evaluating
if
diameter
protects
bud
stems
from
heat
flux.
Conducted
at
edge
an
Ombrophylous
Forest
Alto
Juruá
Acre,
Brazil
(7°45′
S,
72°22′
W),
experiment
subjected
85
controlled
burning
a
1
m2
area
near
stem,
with
temperature
sampling
using
K
thermocouples.
results
showed
varying
rates
among
larger
stem
correlating
reduced
mortality.
Crown
patterns
significantly
influenced
mortality,
especially
for
precatoria.
species
exhibited
diverse
regrowth
capacities,
B.
showing
highest
number
tallest
basal
resprouts.
variation
morphology
appeared
be
more
important
than
amount
flux
applied
each
individual
involved
experiment,
as
no
significant
difference
was
observed
time–temperature
history
measured.
underscores
plant
critical
indicator
severity,
essential
understanding
its
ecological
impacts.
Language: Английский