Ecological Processes,
Journal Year:
2020,
Volume and Issue:
9(1)
Published: Oct. 21, 2020
Abstract
Background
The
oak
tree
(
Quercus
aegilops
)
comprises
~
70%
of
the
forests
in
Kurdistan
Region
Iraq
(KRI).
Besides
its
ecological
importance
as
residence
for
various
endemic
and
migratory
species,
Q.
forest
also
has
socio-economic
values—for
example,
fodder
livestock,
building
material,
medicine,
charcoal,
firewood.
In
KRI,
been
degrading
due
to
anthropogenic
threats
(e.g.,
shifting
cultivation,
land
use/land
cover
changes,
civil
war,
inadequate
management
policy)
these
could
increase
climate
changes.
KRI
a
whole,
information
on
current
potential
future
geographical
distributions
is
minimal
or
not
existent.
objectives
this
study
were
(i)
predict
habitat
suitability
species
relation
environmental
variables
change
scenarios
(Representative
Concentration
Pathway
(RCP)
2.6
2070
RCP8.5
2070);
(ii)
determine
most
important
controlling
distribution
KRI.
achieved
by
using
MaxEnt
(maximum
entropy)
algorithm,
available
records
,
variables.
Results
model
demonstrated
that,
under
RCP2.6
scenarios,
ranges
would
be
reduced
3.6%
(1849.7
km
2
3.16%
(1627.1
),
respectively.
By
contrast,
expand
1.5%
(777.0
1.7%
(848.0
was
mainly
controlled
annual
precipitation.
Under
centroid
shift
toward
higher
altitudes.
Conclusions
results
suggest
significant
suitable
range
will
lost
preference
cooler
areas
(high
altitude)
with
high
Conservation
actions
should
focus
mountainous
establishment
national
parks
protected
areas)
These
findings
provide
useful
benchmarking
guidance
investigation
ecology
forest,
categorical
maps
can
effectively
used
improve
biodiversity
conservation
plans
whole.
Ecological Processes,
Journal Year:
2022,
Volume and Issue:
11(1)
Published: June 8, 2022
Abstract
Background
Many
research
papers
have
utilized
Species
Distribution
Models
to
estimate
a
species’
current
and
future
geographic
distribution
environmental
niche.
This
study
aims
(a)
understand
critical
features
of
SDMs
used
model
endemic
rare
species
(b)
identify
possible
constraints
with
the
collected
data.
The
present
systematic
review
examined
how
are
on
plant
optimal
practices
for
research.
Results
evaluated
literature
(79
articles)
was
published
between
January
2010
December
2020.
number
grew
considerably
over
time.
studies
were
primarily
conducted
in
Asia
(41%),
Europe
(24%),
Africa
(2%).
bulk
(38%)
focused
theoretical
ecology,
climate
change
impacts
(19%),
conservation
policy
planning
(22%).
Most
publications
devoted
biodiversity
conservation,
ecological
or
multidisciplinary
fields.
degree
uncertainty
not
disclosed
most
(81%).
Conclusion
provides
broad
overview
emerging
trends
gaps
majority
failed
uncertainties
error
estimates.
However,
when
performance
estimates
given,
results
will
be
highly
effective,
allowing
more
assurance
predictions
they
make.
Furthermore,
based
our
review,
we
recommend
that
should
represent
levels
errors
modelling
process.
Ecological Indicators,
Journal Year:
2023,
Volume and Issue:
146, P. 109879 - 109879
Published: Jan. 12, 2023
Climate
change
is
causing
shifts
in
the
habitat,
distribution,
ecology,
and
phenology
of
Himalayan
plants.
These
changes
are
predicted
to
continue,
jeopardizing
survival
medicinal
plant
species
local
livelihoods
that
rely
on
them.
We
analyzed
present
future
diversity
distribution
influenced
by
different
climate
scenarios,
calculated
climatic
niche
using
ensemble
modeling
(eSDM).
compiled
1041
(N)
geospatial
data
seven
high-value
Nepal:
Aconitum
spicatum
(n
=
100),
Allium
wallichii
151),
Bergenia
ciliata
48),
Nardostachys
jatamansi
121),
Neopicrorhiza
scrophulariiflora
94),
Paris
polyphylla
310)
Valeriana
217)
including
over
85
%
from
field
surveys
rest
literature
online
database.
used
bioclimatic
variables
Models
for
Interdisciplinary
Research
(MIROC)
version
MIROC6,
selected
Shared
Socioeconomic
Pathways
(SSP)2-4.5
SSP5-8.5
year
2050
2070
modeling.
found
elevation,
mean
diurnal
annual
temperature
ranges
(BIO2
BIO7),
precipitation
warmest
coldest
quarters
(BIO18
BIO19)
be
most
high
weight
cofactors
projecting
potential
plants
Nepal.
Results
showed
suitable
range
would
increase
concentrate
mountainous
areas
central
Nepal,
but
decline
(sub)tropical
temperate
areas,
suggesting
both
in-situ
ex-situ
conservation
practices,
respectively.
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(2)
Published: Feb. 1, 2024
Climate
change
is
a
vital
driver
of
biodiversity
patterns
and
species
distributions,
understanding
how
organisms
respond
to
climate
will
shed
light
on
the
conservation
endangered
species.
In
this
study,
MaxEnt
model
was
used
predict
potential
suitable
area
12
threatened
medicinal
plants
in
QTP
(Qinghai-Tibet
Plateau)
under
current
future
(2050s,
2070s)
three
scenarios
(RCP2.6,
RCP4.5,
RCP8.5).
The
results
showed
that
climatically
habitats
for
were
primarily
found
eastern,
southeast,
southern,
some
parts
central
regions
QTP.
Moreover,
25%
would
have
reduced
habitat
areas
within
next
30-50
years
different
global
warming
scenarios.
Among
these
plants,
RT
(
Ecology and Evolution,
Journal Year:
2019,
Volume and Issue:
9(10), P. 5938 - 5949
Published: April 24, 2019
Species
distribution
modeling
often
involves
high-dimensional
environmental
data.
Large
amounts
of
data
and
multicollinearity
among
covariates
impose
challenges
to
statistical
models
in
variable
selection
for
reliable
inferences
the
effects
factors
on
spatial
species.
Few
studies
have
evaluated
compared
performance
multiple
machine
learning
(ML)
handling
multicollinearity.
Here,
we
assessed
effectiveness
removal
correlated
regularization
cope
with
ML
habitat
suitability.
Three
algorithms
maximum
entropy
(MaxEnt),
random
forests
(RFs),
support
vector
machines
(SVMs)
were
applied
original
(OD)
27
landscape
variables,
reduced
(RD)
14
highly
being
removed,
15
principal
components
(PC)
OD
accounting
90%
variability.
The
three
was
measured
area
under
curve
continuous
Boyce
index.
We
collected
663
nonduplicated
presence
locations
Eastern
wild
turkeys
(Meleagris
gallopavo
silvestris)
across
state
Mississippi,
United
States.
Of
total
locations,
453
separated
by
a
distance
≥2
km
used
train
OD,
RD,
PC
data,
respectively.
remaining
210
validate
trained
measure
performance.
had
excellent
RD
MaxEnt
SVMs
good
indicating
adequacy
default
setting
Weak
RFs
through
bagging
appeared
alleviate
resulted
Regularization
may
help
exploratory
suitability
wildlife.