Seed Rain in Subtropical Grasslands Under Different Grazing Intensities
Applied Vegetation Science,
Journal Year:
2025,
Volume and Issue:
28(2)
Published: April 1, 2025
ABSTRACT
Question
Seed
rain
maintains
propagule
stocks
in
the
seed
bank
and
governs
plant
recruitment
community
composition.
However,
studies
Southern
Hemisphere
grasslands
remain
scarce,
little
is
known
about
effects
of
grazing
on
rain.
We
evaluated
with
distinct
intensities
(high,
moderate,
low,
very
not
grazed)
subtropical
southern
Brazil.
Location
Long‐term
cattle
management
experiment
Campos
grassland,
Methods
was
collected,
using
pot
traps
sterile
soil,
monthly
for
one
year.
Additionally,
we
recorded
species
fruiting
phase
present
vegetation.
The
estimated
by
seedling
emergence
method.
performed
randomization
tests
to
compare
density
composition
among
managements
seasons,
functional
(broad
groups
plants
dispersal
traits).
Results
observed
high
numbers
(up
106,070
seedlings/m
2
,
representing
maximum
annual
sum)
samples,
seeds
from
90
species.
ungrazed
treatment
showed
highest
number
seedlings.
Across
no
significant
differences
were
found,
due
large
variation.
Similarity
between
vegetation
low
(Sørensen
index
values
13%
30%).
Conclusion
Our
results
indicate
that
are
dispersed
potentially
incorporated
into
soil
at
grassland
site.
This
study
contributes
understanding
dynamics
under
different
regimes.
findings
can
guide
strategies
enhance
target
species,
supporting
effective
conservation
restoration
efforts.
Language: Английский
First steps in restoring Río de la Plata grasslands: the importance of harvest method and season
Restoration Ecology,
Journal Year:
2024,
Volume and Issue:
32(7)
Published: June 24, 2024
Current
trends
in
agricultural
intensification
lead
to
degraded
grasslands,
requiring
their
restoration
through
native
species
reintroduction.
Various
techniques
are
available
for
harvesting
seeds
from
donor
sites.
However,
little
is
known
about
performance
South
American
C
3
/C
4
mixed
where
studies
scarce.
Their
particular
composition
and
phenology,
with
different
flowering
periods,
require
specific
harvest
strategies.
We
evaluated
mechanical
seed
a
northern
Uruguay
grassland,
part
of
Río
de
la
Plata
grasslands.
Performance
two
methods
(seed‐stripper
dry
hay)
was
compared
seasons
(late‐spring
mid‐summer).
The
evaluation
considered
the
quantity
identity
harvested
seeds,
germination
greenhouse.
Hand
collections
were
made
assess
standing
yield.
For
each
mixture,
efficiency
harvests
(number
seedlings
hand
collection),
proportion
germinated
transfer
relative
site,
calculated.
Results
revealed
trade‐offs
between
harvests:
seed‐stripper
late‐spring
presented
low
collection
(2%
5%
seedlings)
richness
(43%
transfer),
but
high
(64%),
showing
selectivity
toward
winter
species;
mid‐summer
hay
both
showed
(42–154%
26–50%
(65–80%
resembling
albeit
lower
(9–20%).
Seed‐stripper
varied
seasons,
while
remained
consistently
effective.
These
results
pioneering
grassland
Uruguay,
encouraging
future
focus
on
establishment
field.
Language: Английский
Interactions of climate, topography, and soil factors can enhance the effect of a single factor on spring phenology in the arid/semi-arid grasslands of China
Journal of Cleaner Production,
Journal Year:
2024,
Volume and Issue:
473, P. 143556 - 143556
Published: Sept. 3, 2024
Language: Английский
A Review of Reproductive Plant Phenology in South and Central America: New Perspectives
Published: Jan. 1, 2024
Language: Английский
Less hay collected at more dates: toward successful restoration of subtropical grasslands by hay transfer
Restoration Ecology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 2, 2024
Hay
transfer
is
a
promising
method
to
restore
temperate
and
subtropical
grasslands,
but
its
efficiency
may
depend
on
the
harvesting
timing
amount
of
hay
used.
We
evaluated
effects
harvest
date
(mid‐spring/November,
early
summer/December,
mid‐summer/February)
quantity
(500
1000
g/m
2
)
vegetation
cover,
species
richness,
composition
in
an
experimental
study
southern
Brazil
for
period
years.
undried
from
well‐conserved
reference
area
onto
former
grassland
site
degraded
by
pine
plantations.
harvested
during
mid‐spring
summer
led
higher
soil
cover
richness
compared
mid‐summer
treatment
first
year
experiment.
A
drought
spell
decreased
second
following
transfer,
with
being
least
affected.
C
3
grasses
were
more
effectively
introduced
hay,
contrast
4
that
better
hay.
Lower
quantities
tended
lead
all
dates.
Freshly
cut
can
be
effective
way
reintroduce
native
grasslands.
conclude
collection
used
influence
at
restoration
multiple
dates
increase
success.
The
experiment
illustrates
need
consider
possibility
adverse
climatic
conditions
planning.
Language: Английский
Differences in phenology between non‐native C4 grasses and native C3 and C4 grasses in a seasonally dry ecosystem
Austral Ecology,
Journal Year:
2024,
Volume and Issue:
49(12)
Published: Dec. 1, 2024
Abstract
Plant
species
phenology
is
an
important
driver
of
invasions
in
seasonal
climates.
The
non‐natives
generally
uncoupled
from
that
native
species.
Grasses
cover
a
large
proportion
the
land
surface
and
are
invaders
around
world.
Interestingly,
non‐native
grasses
could
be
modulated
by
different
metabolic
pathways.
We
aimed
to
compare
vegetative
reproductive
invasive
C₄
with
coexisting
C₃
explore
relationship
between
climate.
recorded
onset,
duration
synchronicity
(flowering
fruiting)
during
1
year.
Native
had
50%
their
above‐ground
biomass
green
earlier
remained
state
for
longer
period
than
grasses.
Flowering
fruiting
occurred
flowering
was
C₄,
Melinis
repens
(Poaceae),
highly
worldwide,
accounting
most
difference.
Non‐native
tended
exhibit
lower
synchrony
both
Finally,
positively
associated
temperature,
while
precipitation
mostly
observed
related
differences
metabolism
among
studied
species,
reproduction
due
advantage
resource
use
Our
work
provides
first
insight
into
possible
role
origin
pathways
we
suggest
future
directions
elucidate
these
processes.
Language: Английский