Frontiers in Ecology and Evolution,
Journal Year:
2022,
Volume and Issue:
10
Published: Sept. 23, 2022
The
riverine
barrier
hypothesis
has
been
extensively
explored
in
Neotropical
rainforests,
while
its
importance
drier
regions
such
as
the
Caatinga,
a
seasonally
dry
tropical
forest
northeastern
Brazil,
only
recently
received
more
attention.
Caatinga
is
bisected
by
São
Francisco
River
(SFR),
which
long
suggested
to
be
an
important
biogeographic
feature
region.
However,
recent
studies
have
found
mixed
support
for
role
of
SFR
hard
barrier,
most
them
relying
on
presence
or
absence
genetic
breaks
congruent
with
course.
Here,
we
used
published
multilocus
and
next-generation
data
from
six
vertebrate
species
test
SFR’s
strength
barrier.
Using
model-based
approaches
(approximate
Bayesian
computation
supervised
machine
learning),
tested
demographic
models
incorporating
full,
intermediate,
zero
migration
across
SFR,
estimating
divergence
times
rates
each
species.
We
allowing
gene
flow
some
Estimated
varied
among
but
are
limited
late
Pleistocene,
coherent
one
several
proposed
paleocourse
changes
river’s
geological
history.
Contrary
results
previous
studies,
our
study
supports
phylogeographic
different
taxonomic
groups,
driving
diversification
Caatinga.
Journal of Biogeography,
Journal Year:
2020,
Volume and Issue:
47(11), P. 2472 - 2482
Published: Aug. 16, 2020
Abstract
Aim
We
investigate
the
spatiotemporal
context
of
diversification
Allobates
,
a
widespread
genus
Amazonian
frogs
with
high
species
diversity
particularly
in
western
Amazonia.
tested
if
that
originated
situ
or
through
repeated
dispersals
from
other
areas
and
this
took
place
during
after
Pebas
system,
vast
lacustrine
system
occupying
most
Amazonia
between
23
10
million
years
ago
(Mya).
Location
Taxon
(Anura:
Aromobatidae).
Methods
gathered
spatially
taxonomically
extensive
sampling
mitochondrial
DNA
sequences
932
specimens
to
delimit
Operational
Taxonomic
Units
(OTUs).
Complete
mitogenomes
these
OTUs
were
assembled
reconstruct
time‐calibrated
phylogeny
used
infer
historical
spatial
origin
lineages.
Results
Phylogenetic
analyses
ancestral
area
reconstruction
suggested
lineages
resulted
events
occurred
inferred
(25
Mya)
Mya,
possible
peak
14
Mya.
Dispersal
among
mostly
towards
Brazilian
Guiana
Shields.
Closely
related
display
an
allopatric
pattern
distribution,
matching
interfluves
delimited
by
modern
rivers.
Main
Conclusions
In
Amazonia,
appears
have
been
simultaneous
last
stages
(14–10
Mya).
Subsequently
(within
Mya),
river
courses
shaped
distribution
possibly
promoted
speciation.
Frontiers in Ecology and Evolution,
Journal Year:
2022,
Volume and Issue:
10
Published: July 4, 2022
Amazonian
rivers
represent
known
barriers
for
avian
dispersal,
reducing
gene
flow
and
enhancing
differentiation.
Despite
the
importance
of
in
evolutionary
process,
we
have
made
only
minor
advances
understanding
limitations
imposed
by
on
flying
birds.
To
fill
that
gap,
conducted
dispersal-challenge
experiments
over
water,
assessing
capabilities
84
tropical
bird
species
22
different
families.
We
mist-netted
released
484
birds
from
a
stationary
boat
Rio
Branco,
northern
Amazonia,
at
increasing
distances
shore,
including
249
individuals
100;
219
200;
8
300;
5
400
m.
A
successful
trial
was
represented
reaching
riverbank,
whereas
failure
would
refer
to
not
shore
landing
when
they
were
rescued
our
team.
Our
main
goal
understand
if
outcome
could
be
predicted
(i)
phylogenetic
constraints,
(ii)
morphology
(body
mass
wing
shape),
(iii)
flight
speed,
(iv)
ecological
preferences
(stratum,
habitat,
river-island
specialization),
(v)
psychological
reluctance
fly.
Nearly
two
thirds
(332)
152
failed.
found
significant
differences
among
lineages.
Whereas
seven
families
succeeded
all
trials,
(antbirds
wrens)
particularly
bad
dispersers
(<40%
success).
The
hand-wing
index
(HWI)
single
most
powerful
predictor
success.
Flying
speed
also
Overall,
attributes
had
low
explanatory
power.
Only
forest
stratum
preference
significant,
although
weak,
effect
dispersal
ability:
canopy-
ground-dwellers
performed
better
than
understory
However,
no
habitat
or
specialization
ability.
estimates
64
are
first
produced
tropics
suggest
slower
speeds
those
reported
temperate
migratory
Although
showed
behavioral
presented
with
opportunity
fly
away
boat,
evidence
their
predict
experiments.
This
represents
experimental
study
evaluating
riverine
through
ability
birds,
providing
important
insights
provided
barriers.
Proceedings of the Royal Society B Biological Sciences,
Journal Year:
2021,
Volume and Issue:
288(1942), P. 20202567 - 20202567
Published: Jan. 6, 2021
The
mountains
of
southwest
China
(MSWC)
is
a
biodiversity
hotspot
with
highly
complex
and
unusual
terrain.
However,
the
majority
studies
focusing
on
biogeographic
consequences
massive
mountain
building,
Quaternary
legacy
for
MSWC
has
long
been
overlooked.
Here,
we
took
statistical
comparative
phylogeography
approach
to
examine
factors
that
shaped
community-wide
diversification.
With
data
from
30
vertebrate
species,
results
reveal
spatially
concordant
genetic
structure,
temporally
clustered
co-divergence
events
associated
river
barriers
during
severe
glacial
cycles.
This
indicates
importance
riverine
in
phylogeographic
history
community.
We
conclude
repeated
cycles
are
co-divergences
themselves
structured
by
heterogeneity
montane
landscape
MSWC.
orderly
process
diversification
profound
implications
conservation
highlighting
relative
independence
different
geographical
areas
which
some,
but
not
all
species
communities
have
responded
similarly
climate
change
calls
further
investigations
connection
between
biological
traits
divergence
pulses
this
hotspot.
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(3)
Published: March 1, 2024
Abstract
Common
distributional
patterns
have
provided
the
foundations
of
our
knowledge
Neotropical
biogeography.
A
distinctive
pattern
is
“circum‐Amazonian
distribution”,
which
surrounds
Amazonia
across
forested
lowlands
south
and
east
basin,
Andean
foothills,
Venezuelan
Coastal
Range,
Tepuis.
The
underlying
evolutionary
biogeographical
mechanisms
responsible
for
this
widespread
avian
distribution
yet
to
be
elucidated.
Here,
we
test
effects
barriers
in
four
species
passerine
family
Thamnophilidae
by
performing
comparative
demographic
analyses
genome‐scale
data.
Specifically,
used
flanking
regions
ultraconserved
estimate
population
historical
parameters
genealogical
trees
tested
models
reflecting
contrasting
scenarios
explaining
circum‐Amazonian
distribution.
We
found
that
taxa
with
at
least
two
main
phylogeographical
clusters:
(1)
Andes,
often
extending
into
Central
America
Tepuis;
(2)
remaining
their
These
clusters
are
connected
through
corridors
along
Chaco–Cerrado
southeastern
Amazonia,
allowing
gene
flow
between
eastern
South
American
populations.
Demographic
histories
consistent
Pleistocene
climatic
fluctuations
having
a
strong
influence
on
diversification
history
taxa,
Refugia
played
crucial
role,
enabling
both
phenotypic
genetic
differentiation,
maintaining
substantial
interconnectedness
keep
considerable
levels
during
different
dry/cool
warm/humid
periods.
Additionally,
steep
environmental
gradients
appear
play
critical
role
structure.
Systematics and Biodiversity,
Journal Year:
2021,
Volume and Issue:
19(4), P. 375 - 399
Published: March 23, 2021
The
outstanding
species
richness
of
Amazonia
has
fascinated
biologists
for
centuries.
However,
the
records
actual
numbers
and
distribution
forming
its
ecosystems
are
so
incomplete
that
understanding
historical
causes
regional
determinants
this
diversity
remain
speculative.
Anuran
clades
have
repeatedly
been
documented
to
harbour
many
unnamed
in
region,
notably
Boana
albopunctata
group.
Considering
ecology
group,
we
hypothesized
it
diversified
via
successive
trans-riverine
dispersals
during
late
Miocene
Pliocene,
after
formation
modern
Amazon
watershed.
To
test
hypothesis,
gathered
an
extensive
dataset
16S
rDNA
sequences
sampled
throughout
a
mitogenomic
representative
clade
(1)
re-evaluate
boundaries
distributions,
(2)
infer
spatio-temporal
history
diversification
within
Amazonia.
We
delimited
14
Operational
Taxonomic
Units
(OTUs)
Amazonian
clade,
i.e.,
75%
higher
than
currently
recognized
(14
OTUs
eight
described
species).
Combining
molecular
data
with
morphological
acoustic
data,
two
new
species,
courtoisae
sp.
nov.
from
eastern
Guiana
Shield
eucharis
Southern
Amazonia,
herein.
These
belong
last
10
Ma,
thus
more
recently
co-distributed
small
terrestrial
anurans
but
concomitantly
other
vagile
vertebrates.
Our
time-scaled
phylogeny
biogeographic
analyses
suggest
initial
east-west
divergence
confirm
reciprocal
5
Ma.
geomorphological
evolution
region
species-specific
dispersal
ability
largely
explain
these
distinct
patterns
across
anurans.http://www.zoobank.org/zoobank.org:act:4F8ACA9F-F6F1-4605-BD6C-6D4650AACCBEhttp://www.zoobank.org/zoobank.org:act:51CC7B40-2D6B-4A9E-AF50-AB34D4CE1042