Journal of Tropical Ecology,
Journal Year:
2022,
Volume and Issue:
38(2), P. 49 - 57
Published: Jan. 7, 2022
Abstract
Invasive
alien
species
are
a
major
threat
to
global
biodiversity
due
the
tremendous
ecological
and
economic
damage
they
cause
in
forestry,
agriculture,
wetlands,
pastoral
resources.
Understanding
spatial
pattern
of
invasive
disentangling
biophysical
drivers
invasion
at
forest
stand
level
is
essential
for
managing
ecosystems
wider
landscape.
However,
forest-level
species-specific
information
on
Alien
Plant
Species
(IAPS)
abundance
their
extent
largely
lacking.
In
this
context,
we
analysed
cover
one
world’s
worst
plants,
Chromolaena
odorata
,
Sal
(
Shorea
robusta
)
central
Nepal.
Vegetation
was
sampled
four
community
forests
using
0.01
ha
square
quadrats,
covering
edge
interior.
C.
cover,
floral
richness,
tree
density,
canopy
shrub
basal
area,
disturbances
were
measured
each
plot.
We
also
explored
IAPS
management
practices
forests.
negatively
correlated
with
distance
road,
angle
slope,
cover.
Tree
had
largest
effect
No
seen
along
native
richness
gradients.
conclusion,
overriding
biotic
covariate
suppressing
Ecological Indicators,
Journal Year:
2022,
Volume and Issue:
142, P. 109291 - 109291
Published: Aug. 13, 2022
Vegetation
composition
and/or
plant
species
co-existence
is
influenced
by
the
environmental
variations
in
any
region.
The
ecological
knowledge
and
order
of
importance
selected
important
conservation
management
resources.
Based
on
relevant
gap,
study
area
district
Jhelum,
Pakistan
lying
an
arid-tropical
zone
was
to
explore
vegetation
types
their
driving
factors
using
latest
multivariate
statistical
approaches.
For
this,
entire
ecologically
explored
collect
natural
wild
data
from
January
2018
December
2020.
partitioned
into
171
grids
(5
×
5
km2).
In
each
grid,
three
sites
were
randomly
(i.e.
513
samples),
subsequently-nine
plots
laid
at
sampling
site
1539
plots).
Different
tests
including
Monte
Carlo
permutation
test,
Indicator
Species
Analysis
(ISA),
hierarchical
classification,
ordination,
variation
partitioning
applied
seek
potential
number
types,
composition,
classification
studied
samples,
considered
predictors
groups
variables
respectively.
findings
this
indicated
that
all
documented
291
belong
five
statistically
significant
(p
<
0.05)
communities.
Out
thirty
(30)
variables,
canonical
correspondence
analysis
suggested
role
distance
river,
altitude,
latitude,
slope,
temperature,
rainfall,
cropland,
grazing
deforestation
pressure,
soil
pollutants
chromium,
arsenic
nickel
concentrations.
Similarly,
diversity
patterns
found
strongly
associated
with
local
conditions.
This
concluded
river
(a
leading
proxy
ground
water
table
depth)
relatively
more
than
rainfall
variability
tropical
arid
area.
Hence,
relative
proportion
xerophytic
higher
western
parts
compared
eastern
adjoining
Jhelum.
Anthropogenic
disturbances
potentially
toxic
metals
disrupting
normal
ecosystem
functioning
scale
region,
need
immediate
attention
save
valuable
biodiversity.
Sustainability,
Journal Year:
2022,
Volume and Issue:
14(20), P. 13312 - 13312
Published: Oct. 17, 2022
Our
understanding
of
the
diversity
and
distribution
living
things
is
crucial
to
conservation
sustainable
use
biodiversity.
Because
biological
invasions
by
alien
species
pose
a
significant
threat
native
biodiversity,
tracking
at
various
geographical
scales
has
recently
gained
prominence.
The
current
study
designed
evaluate
composition
invasive
plants
in
different
habitats
Mandi
Bahuddin,
Punjab,
Pakistan.
investigation
explores
impact
environmental
factors
on
association
with
edaphic
geographic
patterns.
Diversity
patterns,
ecological
impact,
respect
variables
were
recorded.
A
randomized
sampling
technique
was
used
taking
data
from
120
sites
triplet
quadrates
each,
360
overall,
between
2019
2021
record
flora
associated
variables.
Important
value
indices
for
each
determined
data,
cluster
ordination
analysis.
Overall,
43
37
genera
18
families
documented
district
Bahuddin.
prominent
family
Poaceae
ten
(23.25%)
followed
Leguuminosae
six
(13.95%),
Compositae
five
(11.62%),
Amaranthaceae
three
(6.97%),
Convolvulaceae,
Euphorbiaceae,
Malvaceae,
Polygonaceae,
Scrophulariaceae
two
(4.65%).
Out
65
comprised
herbs
52.13%,
grasses
23.25%,
shrubs
9.30%,
trees
9.30%.
In
case
life
form
Therophyte
(48.83%)
leading,
Chamaephyte
(16.27%)
species,
Nanophanerophyte
Megaphanerophyte
(11.62%)
Geophyte
(6.97%)
Hemicryptophyte
(4.65%)
species.
With
leaf
size
spectra,
microphylls
(41.86%)
dominating
mesophylls
(27.90%),
leptophylls
nanophylls
macrophylls
PCA
applied
order
further
understand
abundance
pattern
find
connections
among
locations
comprising
habitats.
Ward’s
agglomerative
clustering
classified
one
hundred
twenty
transects
into
four
major
groups.
Ordination
analysis
showed
that
had
(p
≤
0.002)
influence
vegetation.
provides
foundation
which
comprehend
influences
plants’
composition,
diversity,
structure,
links.
These
will
be
useful
developing
scientifically
informed
management
strategies
administrative
agencies
restoration
degraded
habitat
studied
area.
Ecological Modelling,
Journal Year:
2024,
Volume and Issue:
493, P. 110754 - 110754
Published: May 17, 2024
Species
distribution
models
(SDMs)
have
become
central
tools
in
ecology
and
biogeography.
Although
they
can
be
fitted
with
different
types
of
species
data
(e.g.
presence-absence,
abundance),
the
most
common
approach,
based
on
from
large
repositories,
is
to
use
simple
occurrences
(i.e.
presence-only)
combined
background
points
(BP;
also
called
pseudo-absences).
But
how
should
we
sample
these
points,
does
this
choice
affect
SDMs?
In
studies
so
far,
BP
were
sampled
randomly
geographic
space,
yet
theory
rather
suggests,
if
a
at
equilibrium,
that
it
better
them
stratified
way
environmental
space.
However,
potential
improvement
SDM
predictions
has
never
been
tested.
Furthermore,
typical
assumption
behind
SDMs
modelled
are
equilibrium
their
environment.
do
perform
when
disequilibrium,
as
case
for
invasive
species?
To
answer
questions,
selected
30
(10
insects,
10
mammals
plants;
each
group
5
considered
equilibrium)
calibrated
selections:
random
random-stratified
For
assessed
both
predictive
performance
using
standard
metrics
stability
new
approach
compares
model's
habitat
suitability
projection
those
virtual
occurrence
generated
suitable
areas.
Finally,
compared
alien
(disequilibrium)
versus
native
(equilibrium)
by
comparing
model
two
groups.
We
found
sampling
stratified-random
space
yields
highest
metrics,
fully
stable
models.
This
implications
conservation,
classical
frequently
used
produce
less
accurate
Our
results
indicate
best
accuracy
essential,
essential.
Sustainability,
Journal Year:
2022,
Volume and Issue:
14(18), P. 11117 - 11117
Published: Sept. 6, 2022
Documentation
the
relative
influence
of
ecological
dynamics
on
species
diversity
patterns
can
help
us
better
understand
spatial
distribution
and
devise
a
systematically
comprehensive
base
for
carrying
out
environmental
explorations.
The
current
attempt
aimed
at
exploring
patterns,
richness
wild
grasses
with
respect
to
climatic
in
Gujrat
district
Punjab,
Pakistan.
For
this
purpose,
we
applied
randomized
sample
method
sampled
total
90
sites
across
between
2019
2021
document
data
related
conditions.
After
assessment
significant
value
index
each
grass
records,
evaluated
by
ordination
cluster
analysis.
A
57
from
37
genera
were
documented
district.
leading
Brachiaria,
Cenchrus
Setaria,
accounting
7.02%
all
species,
followed
Aristida
Panicum,
representing
5.76%
species.
Dactyloctenium,
Dichanthium,
Eragrostis,
Polypogon,
Poa
Saccharum
accounted
5.26%
Digitaria,
Pennisetum,
Chrysopogon
Setaria
3.51%
Other
had
single
Among
grasses,
75.44%
native
24.56%
exotic
introduced
study
area.
life
forms
therophytes
(56.14%),
hemicryptophytes
(42.11%)
geophytes
(1.75%).
Microphylls,
54.39%
share,
dominated
leaf
size
spectra
flora
research.
frequent
classes
included
nanophylls
(21.05%),
macrophylls
(19.3%)
leptophylls
(5.26%).
Flowering
phenology
showed
that
mainly
flowering
phase
recorded
during
months
June
August
(40.35%)
July
September
(19.29%).
By
applying
Ward’s
agglomerative
clustering
method,
classified
ninety
transects
into
four
major
groups.
Ordination
analysis
different
factors
(p
≤
0.002)
effects
vegetation
relations.
present
endeavor
provides
basic
way
impacts
variables
structure,
diversity,
composition
associations
which
are
helpful
improve
scientific-informed
conservation
management
measures
reestablishment
degraded
habitat
studied
region.
Ecography,
Journal Year:
2024,
Volume and Issue:
2024(7)
Published: April 9, 2024
We
assessed
the
impact
of
road
disturbances
on
dominant
mycorrhizal
types
in
ecosystems
at
global
level
and
how
this
mechanism
can
potentially
lead
to
lasting
plant
community
changes.
used
a
database
coordinated
surveys
following
mountain
roads
from
894
plots
11
regions
across
globe
combination
with
an
existing
mycorrhizal–plant
associations
order
approximate
relative
abundance
natural
disturbed
environments.
Our
findings
show
that
roadside
disturbance
promotes
cover
plants
associated
arbuscular
(AM)
fungi.
This
effect
is
especially
strong
colder
environments
where
communities
are
dominated
by
ectomycorrhizal
(EcM)
or
ericoid‐mycorrhizal
(ErM)
associations.
Furthermore,
non‐native
species,
which
we
confirmed
be
mostly
AM
plants,
more
successful
These
biogeographical
patterns
suggest
changes
could
crucial
factor
worldwide
anthropogenic
ecosystems.
Indeed,
roadsides
foster
AM‐dominated
systems,
AM‐fungi
might
aid
AM‐associated
species
while
reducing
biotic
resistance
against
invasive
often
also
networks.
Restoration
efforts
will
have
contend
fundamental
make‐up
EcM‐
ErM
induced
disturbance.
Oikos,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 8, 2025
Roads
in
cold
climate
mountains
are
known
to
be
important
vectors
the
introduction
and
spread
of
non‐native
plant
species.
In
same
context,
mycorrhizal
fungi
communities
altered
by
roads,
with
a
positive
effect
on
arbuscular
(AM)
diversity
abundance
disturbed
roadsides.
However,
what
degree
these
two
effects
roads
intertwined
how
they
evolving
over
time
is
not
well
understood.
this
study
we
conducted
repeated
surveys
plants
AM
between
2012
2022,
northern
Scandes
investigate
temporal
changes
interactions
plants.
We
found
that
upward
lateral
away
from
roadside
into
natural
vegetation
were
so
far
extremely
limited,
only
out
23
species
showing
an
increase
their
upper
elevational
limit.
cover
did
ten
year
period,
especially
at
lower
elevations,
richness
increased
17
Likewise,
saw
fungal
last
four
years
along
roadsides
elevations.
Furthermore,
our
results
suggest
increases
unlikely
driving
cause
observed
abundance,
as
colonization
varied
independently
dynamics.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 27, 2025
Abstract
Biological
invasions
are
a
serious
global
issue,
but
relatively
less
common
at
high
latitudes,
likely
due
to
harsh
environmental
conditions
and
limited
accessibility.
An
exception
this
is
human-settled
disturbed
towns
that
may
promote
act
as
source
of
non-native
species
into
the
surrounding
natural
areas.
Churchill,
Manitoba,
Canada
(58ºN),
treeline
subarctic
town
connected
by
railway
shipping
port,
over
hundred
plant
have
been
recorded
within
footprint
associated
While
some
persisted
for
decades
in
these
areas,
none
has
spread
nearby
tundra
or
boreal
forest
ecosystems,
making
an
ideal
region
investigate
barriers
invasions.
We
used
warming
experiment
importance
increased
growing
season
temperatures
on
three
perennial
(Linaria
vulgaris,
Plantago
major,
Taraxacum
officinale),
extended
both
spatial
temporal
scale
survival
growth
across
tundra-boreal
boundary
several
full
years.
found
plants
were
able
survive
after
manual
translocation
indicating
low
dispersal
limiting
factor
spread.
In
addition,
seed
germination
was
improved
warmer
microsites,
suggesting
temperature
also
factor.
However,
consistently
declined
time,
despite
experimental
manipulations
remove
invasion
barriers.
Future
climate
change
results
higher
rates
and/or
shift
from
failure
success.