Prediction of Potential Distribution and Response of Changium smyrnioides to Climate Change Based on Optimized MaxEnt Model
Plants,
Journal Year:
2025,
Volume and Issue:
14(5), P. 743 - 743
Published: Feb. 28, 2025
Changium
smyrnioides,
an
endangered
herb
known
for
its
medicinal
roots,
contains
essential
amino
acids
that
are
vital
human
health
but
cannot
be
synthesized
by
the
body.
However,
wild
populations
of
this
species
have
been
steadily
declining
due
to
combined
impacts
climate
change
and
anthropogenic
activities.
In
study,
we
employed
optimized
MaxEnt
model
predict
potential
distribution
C.
smyrnioides
under
different
scenarios
evaluate
responses
change.
Our
findings
demonstrated
achieved
optimal
performance
with
a
regularization
multiplier
0.5
feature
combination
linear
quadratic
terms.
Among
environmental
variables,
three
emerged
as
most
critical
factors
shaping
species’
distribution:
elevation,
precipitation
driest
month
(bio14),
isothermality
(bio2/bio7
×
100,
bio3).
Currently,
primary
suitable
habitats
concentrated
in
Jiangsu
Province,
estimated
21,135
km²
classified
highly
suitable.
The
analysis
further
indicated
that,
response
rising
temperatures,
is
likely
shift
northeastward
across
China.
Notably,
results
suggested
total
area
would
increase
over
time
projected
scenarios.
Based
on
predicted
centroid
migration
habitats,
Anhui
Province
was
identified
future
conservation
zone
smyrnioides.
This
region
could
serve
refuge,
ensuring
long-term
survival
changing
climatic
conditions.
Overall,
study
provides
key
insights
into
ecological
change,
offering
evidence-based
guidance
development
effective
strategies
aimed
at
safeguarding
herb.
Language: Английский
Integrative population genomics and ecological niche modelling analyses illuminates the demographic history and inform conservation strategies of Calycanthus chinensis, a critically endangered shrub in subtropical China
Global Ecology and Conservation,
Journal Year:
2025,
Volume and Issue:
unknown, P. e03614 - e03614
Published: May 1, 2025
Language: Английский
Intraspecific Chloroplast Genome Genetic Polymorphism of Pinellia ternata (Xi Junecry) and Its Revelation of a Single Origin in Phylogeny
Genes,
Journal Year:
2024,
Volume and Issue:
15(12), P. 1638 - 1638
Published: Dec. 20, 2024
Background:
Xi
Junecry
(Pinellia
ternata),
a
perennial
herb
of
the
Araceae
family,
is
indigenous
to
Xinxian
County,
Henan
Province,
China,
and
regarded
as
premium
variety
among
similar
medicinal
materials.
However,
lack
comprehensive
genetic
information
on
germplasm
resources
has
constrained
cultivation
identification
high-quality
varieties.
Methods:
In
this
study,
six
chloroplast
genomes
were
assembled
annotated
using
high-throughput
sequencing.
Subsequently,
comparative
analyses
conducted,
phylogenetic
tree
was
constructed.
Results:
The
genome
lengths
ranged
from
157,456
158,406
bp,
GC
content
between
36.0%
36.2%.
A
total
265
single
nucleotide
polymorphism
sites
identified
across
genomes,
with
whole-genome
diversity
(Pi)
value
0.00084.
Among
four
genomic
regions,
small
single-copy
region
exhibited
highest
Pi,
followed
by
large
region,
while
inverted
repeat
showed
lowest.
Nucleotide
in
coding
regions
significantly
lower
than
non-coding
regions.
Nine
hypervariable
identified,
follows:
ndhE-ndhG,
trnN-GUU-ndhF,
trnS-GCU-trnG-UCC,
atpB-rbcL,
psaI,
accD-ycf4,
psbE-petL,
psaC-ndhE,
psbI-trnG-UCC.
Positive
selection
detected
accD
rbcL
genes.
Phylogenetic
analysis
clustered
samples
into
distinct
clade,
separating
them
other
regional
Pinellia
samples.
Conclusions:
These
findings
elucidate
variation
levels
provide
high-variability
loci
for
population
history
inference,
assessment,
species
domestication
studies,
new
cultivar
development.
Language: Английский