Plant Neighbourhood as Predictor of Allopatric Speciation in Sedges
Molecular Ecology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 14, 2025
ABSTRACT
Adaptation
to
different
environments
in
geographically
separated
populations
is
key
for
allopatric
speciation.
Most
research
has
focused
on
the
effects
of
geographical
isolation
and
abiotic
factors,
but
disjunct
frequently
co‐occur
with
pools
species,
favouring
divergent
adaptation
We
show
importance
plant
neighbourhood,
compared
geographic
environmental
speciation
two
closely
related
plants,
Carex
elata
reuteriana
.
Both
species
share
similar
ecological
requirements
inhabit
river
shores
at
medium
low
altitudes
across
Iberian
Peninsula.
employed
a
multidisciplinary
approach
integrating
abiotic,
biotic
genomic
data
(genotyping‐by‐sequencing)
infer
relative
role
evolutionary
drivers.
Abiotic
factors
were
assessed
based
38
bioclimatic
variables,
using
community
co‐occurring
(1536
vegetation
inventories),
distance
matrix
coordinates.
Using
regularised
generalised
linear
models,
we
identified
variables
explaining
distribution
patterns.
also
examined
relationships
between
inter‐population
genetic
distances,
biotic,
understand
drivers
lineage
splitting,
revealing
varying
degrees
influence.
Plant
neighbourhood
emerged
as
stronger
predictor
distributions
than
or
largest
effect
observed
,
which
exhibited
greatest
population
differentiation.
These
findings
suggest
that
microenvironmental
influencing
neighbourhoods
have
significantly
contributed
differentiation
these
taxa,
providing
new
insights
into
processes
shaping
origin
species.
Language: Английский
Genomic evidence for contrasting patterns of host‐associated genetic differentiation across shared host‐plant species in leaf‐ and bud‐galling sawflies
Molecular Ecology,
Journal Year:
2023,
Volume and Issue:
32(7), P. 1791 - 1809
Published: Jan. 10, 2023
Resource
specialization
and
ecological
speciation
arising
through
host-associated
genetic
differentiation
(HAD)
are
frequently
invoked
as
an
explanation
for
the
high
diversity
of
plant-feeding
insects
other
organisms
with
a
parasitic
lifestyle.
While
studies
have
demonstrated
numerous
examples
HAD
in
insect
herbivores,
rarity
comparative
means
that
we
still
lack
understanding
how
deterministic
is,
whether
patterns
host
shifts
can
be
predicted
over
evolutionary
timescales.
We
applied
genome-wide
single
nucleotide
polymorphism
mitochondrial
DNA
sequence
data
obtained
genome
resequencing
to
define
species
limits
compare
host-plant
use
population
samples
leaf-
bud-galling
sawflies
(Hymenoptera:
Tenthredinidae:
Nematinae)
collected
from
seven
shared
willow
(Salicaceae:
Salix)
species.
To
infer
repeatability
long-term
cophylogenetic
patterns,
also
contrasted
phylogenies
two
galler
groups
each
well
phylogeny
their
Salix
hosts
estimated
based
on
RADseq
data.
found
clear
evidence
both
focal
groups,
but
leaf
gallers
more
specialized
compared
most
bud
gallers.
In
contrast
gallers,
exhibited
statistically
significant
signal
hosts.
The
observed
discordant
resource
related
radiated
parallel
across
base
indicate
system,
suggest
short-
diversification
dominated
by
stochasticity
and/or
lineage-specific
effects.
Language: Английский
Considerable genetic diversity and structure despite narrow endemism and limited ecological specialization in the Hayden's ringlet, Coenonympha haydenii
Molecular Ecology,
Journal Year:
2024,
Volume and Issue:
33(7)
Published: March 5, 2024
Abstract
Understanding
the
processes
that
underlie
development
of
population
genetic
structure
is
central
to
study
evolution.
Patterns
structure,
in
turn,
can
reveal
signatures
isolation
by
distance
(IBD),
barriers
gene
flow,
or
even
genesis
speciation.
However,
it
unclear
how
severe
range
restriction
might
impact
dominate
structure.
In
narrow
endemic
species,
likely
be
adaptive
nature,
rather
result
drift?
this
study,
we
investigated
patterns
diversity
and
Hayden's
ringlet
butterfly.
Specifically,
asked
what
degree
explained
IBD,
resistance
(IBR)
(in
form
geographic
ecological
migration
between
populations),
environment
differences
host
plant
availability
preference).
We
employed
a
genotyping‐by‐sequencing
(GBS)
approach
coupled
with
preference
assays,
Bayesian
modelling,
genomic
analyses
answer
these
questions.
Our
results
suggest
despite
their
restricted
range,
levels
are
comparable
those
seen
more
widespread
butterfly
species.
ringlets
showed
strong
for
feeding
on
grasses
relative
sedges,
but
neither
larval
nor
potential
at
sampling
sites
correlated
conclude
geography,
IBR
simple
was
major
driver
contemporary
differentiation
Language: Английский
Considerable genetic diversity and structure despite endemism and limited ecological specialization in the Hayden’s ringlet,Coenonympha haydenii
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: May 22, 2023
Abstract
Understanding
the
processes
that
underlie
development
of
population
genetic
structure
is
central
to
study
evolution.
Patterns
structure,
in
turn,
can
reveal
signatures
local
adaptation,
barriers
gene
flow,
or
even
genesis
speciation.
However,
it
unclear
whether
dominate
differ
populations
with
a
severely
restricted
range
relative
widespread
species.
For
example,
narrowly
endemic
species,
likely
be
adaptive
nature
(e.g.,
via
niche
specialization),
rather
result
drift
isolation
by
distance)?
In
this
study,
we
investigated
patterns
diversity
and
narrow
Hayden’s
ringlet
butterfly.
Specifically,
asked
what
degree
explained
distance,
host
association.
We
employed
genotyping-by-sequencing
(GBS)
approach
coupled
preference
assays,
Bayesian
modeling,
genomic
analyses
answer
these
questions.
Our
results
suggest
despite
their
range,
levels
are
comparable
those
seen
non-endemic
butterfly
ringlets
showed
strong
for
feeding
on
grasses
vs.
sedges,
but
neither
nor
potential
availability
at
sampling
sites
correlated
structure.
conclude
geography,
form
migration
simple
were
major
drivers
differentiation
Language: Английский