Authorea (Authorea),
Год журнала:
2023,
Номер
unknown
Опубликована: Ноя. 9, 2023
Differences
in
the
number
of
alien
plant
species
different
locations
may
reflect
climatic
and
other
controls
that
similarly
affect
native
and/or
propagule
pressure
accompanied
with
delayed
spread
from
point
introduction.
We
set
out
to
examine
these
alternatives
for
Himalayan
plants,
a
phylogenetic
framework.
build
database
distributions
Himalaya.
Focusing
on
well
documented
regions
Jammu
&
Kashmir
(west)
Bhutan
(east)
we
compare
(1)
richness
patterns,
(2)
degree
clustering,
(3)
extent
which
species-poor
are
subsets
species-rich
regions,
(4)
continental
affinities/source.
document
1,470
(at
least
600
naturalised),
comprise
~14%
vascular
plants
known
Alien
tropical
affinities
decline
elevation
at
high
elevations
form
subset
those
lower
elevations,
supporting
location
introduction
as
an
important
driver
patterns.
Separately,
especially
rich
also
species,
suggesting
role
climate
(high
productivity)
determining
both
richness.
find
no
support
proposition
human
disturbance
or
resistance
invasion
by
distributions.
Results
imply
ongoing
expansion
low
sources,
some
highly
invasive.
Journal of Biogeography,
Год журнала:
2023,
Номер
51(3), С. 394 - 408
Опубликована: Дек. 1, 2023
Abstract
Aim
Worldwide,
floras
are
becoming
homogenized
at
global
scales,
but
regional
patterns
vary.
Here,
we
present
the
first
assessment
for
Malesian
phytogeographical
region
in
terms
of
timing
introductions,
direction,
magnitude
and
drivers
floristic
change
due
to
alien
plant
naturalizations.
Location
phytogeographic
region,
including
Southeast
Asia
Pacific.
Taxon
Tracheophyta
(vascular
plants).
Methods
We
compiled
data
on
records
naturalized
plants
Malesia
investigate
temporal
trends
rate
origin
introductions.
then
calculated
β‐diversity
(including
turnover
nestedness)
native,
Anthropocene
(native
+
naturalized)
each
pair
island
groups
(36
pairs),
a
homogenization
index
native
floras,
using
presence/absence
31,580
species.
Mantel
tests
were
used
geographic,
climatic
anthropogenic
correlates
dissimilarity
homogenization.
Results
Around
75%
all
species
documented
date
already
reported
time
within
prior
1950.
This
has
led
between
historic
(native)
contemporary
(Anthropocene)
group
pairs.
Turnover
was
most
important
process
driving
compositional
resulted
from
decreases
nestedness
turnover.
Differences
average
taxonomic
associated
with
differences
their
level
modification.
Main
Conclusions
study
improves
current
understanding
direction
one
world's
diverse
tropical
regions.
Alien
introductions
carry
long
historical
legacy
Malesia,
naturalizations
these
have
overall
region's
flora.
Expected
increases
human
modification,
without
appropriate
policy,
will
likely
lead
further
reductions
uniqueness
groups.
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Май 22, 2024
Abstract
Climate
change
and
biological
invasions
represent
significant
drivers
of
biodiversity
loss,
changes
in
climate
land
use
can
also
synergistically
influence
the
naturalization
alien
species
into
new
areas.
Therefore,
reporting
transition
plant
along
casual-naturalization-invasion
continuum
be
crucial
to
early
detection
their
timely
management
with
lower
costs.
Here,
we
report
distribution
recently
naturalized
Matricaria
discoidea
DC.
(Pineapple-weed)
Ladakh,
a
remote
region
located
Trans-Himalayan
Ladakh.
We
provide
taxonomic
description
M.
photo-illustrations
its
distinctive
characters
for
easy
field
identification.
Based
on
sampling
communities
dominated
by
discoidea,
found
it
positively
associated
that
habitat
preferences
similar
but
negatively
several
native
occurred
same
community.
Our
findings
suggest
this
newly
potentially
spread
throughout
trans-Himalayan
may
have
ecological
consequences,
including
negative
impact
diversity
region.
Authorea (Authorea),
Год журнала:
2023,
Номер
unknown
Опубликована: Ноя. 9, 2023
Differences
in
the
number
of
alien
plant
species
different
locations
may
reflect
climatic
and
other
controls
that
similarly
affect
native
and/or
propagule
pressure
accompanied
with
delayed
spread
from
point
introduction.
We
set
out
to
examine
these
alternatives
for
Himalayan
plants,
a
phylogenetic
framework.
build
database
distributions
Himalaya.
Focusing
on
well
documented
regions
Jammu
&
Kashmir
(west)
Bhutan
(east)
we
compare
(1)
richness
patterns,
(2)
degree
clustering,
(3)
extent
which
species-poor
are
subsets
species-rich
regions,
(4)
continental
affinities/source.
document
1,470
(at
least
600
naturalised),
comprise
~14%
vascular
plants
known
Alien
tropical
affinities
decline
elevation
at
high
elevations
form
subset
those
lower
elevations,
supporting
location
introduction
as
an
important
driver
patterns.
Separately,
especially
rich
also
species,
suggesting
role
climate
(high
productivity)
determining
both
richness.
find
no
support
proposition
human
disturbance
or
resistance
invasion
by
distributions.
Results
imply
ongoing
expansion
low
sources,
some
highly
invasive.
