American Journal of Botany,
Год журнала:
2018,
Номер
105(9), С. 1577 - 1594
Опубликована: Сен. 1, 2018
Premise
of
the
Study
The
North
American
Cercis
clade
spans
dry
to
mesic
climates
and
exhibits
complex
morphological
variation.
We
tested
various
proposed
species
classifications
this
group
whether
aspects
leaf
morphology,
particularly
“drip‐tip”
in
some
regional
populations,
are
adaptive
and/or
linked
with
phylogeny.
Methods
made
measurements
on
over
1100
herbarium
specimens
from
throughout
America
analyzed
data
univariate
multivariate
approaches.
phylogenetically
DNA
sequence
nuclear
ITS
three
plastid
regions
40
samples,
estimated
divergence
times
a
relaxed‐clock
Bayesian
analysis.
used
climate
geographic
position
predict
variation
observed
size
shape
by
using
stepwise
multiple
linear
regressions.
Key
Results
Morphometric
analyses
yielded
pattern
continuous
often
clinal
character
across
America,
without
correlated
gaps
states.
Conversely,
phylogenetic
time
distinct
clades
California,
interior
west,
eastern
separated
between
~12
16
million
years.
Multiple
regressions
highly
significant
correlations
apex
precipitation
warmest
quarter.
Conclusions
Despite
variation,
long
period
presumably
genetic
isolation
warrants
delimitation
species.
Predictive
modeling
supports
value
acuminate
apices
or
“drip‐tips”
habitats.
This
suggests
that
leaves
change
more
rapidly
than
inferred
parsimony
reconstruction,
which
has
implications
for
evolution
floras
Eurasia.
Journal of Biogeography,
Год журнала:
2022,
Номер
49(7), С. 1327 - 1338
Опубликована: Май 10, 2022
Abstract
Aim
We
documented
patterns
of
phylogenetic
diversity
(PD)
and
endemism
(PE)
in
the
moss
flora
North
America,
determined
how
environmental
variables
explain
these
patterns,
compared
mosses
to
known
angiosperms
explored
driven
by
sub‐clades
might
conflict
with
other
sub‐clades.
Location
America
north
Mexico.
Taxon
Mosses
(Bryophyta).
Methods
A
maximum‐likelihood
tree
inferred
from
publicly
available
sequence
data
locality
ca.
7.5
×
10
5
herbarium
specimens
were
combined
build
a
dataset
935
species
(representing
67%
flora).
Spatial
randomization
procedures
used
find
significance
levels
PD
relative
(RPD)
for
full
three
major
sub‐clades,
as
well
carry
out
categorical
analysis
Neo‐
Paleo‐endemism
(CANAPE).
Range
weighted
turnover
both
PE
was
identify
phytogeographic
regions
across
continent.
Ordinations
determine
distribution
PD,
RPD,
within
space.
Results
this
study
phylodiversity
angiosperms.
Phylodiversity
is
distributed
non‐randomly.
Some
example,
long
branches
southeastern
US,
are
consistent
angiosperms;
however,
there
strong
contrasts
well.
Overall
RPD
strongly
influenced
different
scales
mosses,
indicating
that
signal
one
clade
can
obscure
others.
Three
primary
zones
defined
differing
geological
histories
current
abiotic
conditions.
Phytogeographic
regions,
all
aligned
variables.
Main
conclusions
There
evidence
ecological
historical
factors
shaping
biogeographic
differences
between
appear
align
important
life‐history
two
groups.
Ecology and Evolution,
Год журнала:
2018,
Номер
8(5), С. 2632 - 2644
Опубликована: Фев. 5, 2018
Abstract
The
geographic
ranges
of
taxa
change
in
response
to
environmental
conditions.
Yet
whether
rates
range
movement
(biotic
velocities)
are
phylogenetically
conserved
is
not
well
known.
Phylogenetic
conservatism
biotic
velocities
could
reflect
similarities
among
related
lineages
climatic
tolerances
and
dispersal‐associated
traits.
We
assess
late
Quaternary
were
they
correlate
with
used
phylogenetic
regression
nonparametric
correlation
evaluate
associations
between
velocities,
traits,
for
28
woody
plant
genera
subgenera
North
America.
which
shifted
their
core
limits
positively
correlated
from
time
step
16
7
ka.
strength
this
weakened
after
ka
as
the
pace
climate
slowed.
Dispersal‐associated
traits
associated
velocities.
Although
some
consistently
fast
others
slow,
conserved.
rapid
shifts
plants
lacking
that
facilitate
frequent
long‐distance
dispersal
has
long
been
noted
(i.e.,
Reid's
Paradox).
Our
results
consistent
paradox
show
it
remains
robust
when
information
taken
into
account.
lack
association
may
several,
nonmutually
exclusive
processes,
including
rare
dispersal,
interactions,
cryptic
refugia.
Because
decoupled
trait
data
cannot
be
predict
longer‐term
(millennial‐scale)
floristic
responses
change.
American Journal of Botany,
Год журнала:
2018,
Номер
105(9), С. 1577 - 1594
Опубликована: Сен. 1, 2018
Premise
of
the
Study
The
North
American
Cercis
clade
spans
dry
to
mesic
climates
and
exhibits
complex
morphological
variation.
We
tested
various
proposed
species
classifications
this
group
whether
aspects
leaf
morphology,
particularly
“drip‐tip”
in
some
regional
populations,
are
adaptive
and/or
linked
with
phylogeny.
Methods
made
measurements
on
over
1100
herbarium
specimens
from
throughout
America
analyzed
data
univariate
multivariate
approaches.
phylogenetically
DNA
sequence
nuclear
ITS
three
plastid
regions
40
samples,
estimated
divergence
times
a
relaxed‐clock
Bayesian
analysis.
used
climate
geographic
position
predict
variation
observed
size
shape
by
using
stepwise
multiple
linear
regressions.
Key
Results
Morphometric
analyses
yielded
pattern
continuous
often
clinal
character
across
America,
without
correlated
gaps
states.
Conversely,
phylogenetic
time
distinct
clades
California,
interior
west,
eastern
separated
between
~12
16
million
years.
Multiple
regressions
highly
significant
correlations
apex
precipitation
warmest
quarter.
Conclusions
Despite
variation,
long
period
presumably
genetic
isolation
warrants
delimitation
species.
Predictive
modeling
supports
value
acuminate
apices
or
“drip‐tips”
habitats.
This
suggests
that
leaves
change
more
rapidly
than
inferred
parsimony
reconstruction,
which
has
implications
for
evolution
floras
Eurasia.
