Animals,
Journal Year:
2024,
Volume and Issue:
14(23), P. 3497 - 3497
Published: Dec. 4, 2024
Gut
microbiota
play
a
significant
role
in
various
physiological
functions,
including
digestion,
nutritional
metabolism,
and
host
immune
function.
The
composition
of
these
gut
microbes
is
largely
influenced
by
habitats.
This
study
examines
the
Eurasian
tree
sparrow
(
Frontiers in Microbiology,
Journal Year:
2025,
Volume and Issue:
16
Published: Feb. 7, 2025
Migratory
birds
exhibit
unique
annual
cycles
that
complicate
their
gut
microbiota.
However,
the
dynamics
of
microbiota
in
migratory
remain
unclear,
hindering
our
understanding
environmental
adaptation.
Here,
we
collected
fecal
samples
from
black-necked
cranes
(Grus
nigricollis)
across
four
seasons
at
breeding
grounds
and
used
wintering
ground
data
databases
to
characterize
microbial
compositions
throughout
year.
The
results
showed
was
clustered
by
season
(Bray-Curtis:
R
2
=
0.348,
p
<
0.001;
UniFrac:
0.352,
0.001).
And
summer
exhibited
higher
alpha
(Simpson
Shannon),
beta
diversity
(Bray-Curtis
UniFrac)
more
diverse
functions
compared
other
seasons.
Furthermore,
summer,
several
balanced
relative
abundances
family
level,
whereas
Lactobacillaceae
dominated
during
Thirty-six
ASVs
were
identified
random
forest
analysis
distinguish
distinct
Despite
having
greater
diversity,
had
a
simpler
network
structure
than
(fewer
edges
nodes).
dispersal
limitation
processes
also
significantly
influenced
community
assembly.
Overall,
crane
undergoes
dynamic
adjustments
adapt
seasonal
changes,
which
may
be
associated
with
variations
diet
These
enhance
wild
support
further
research
on
cranes.
BMC Genomics,
Journal Year:
2025,
Volume and Issue:
26(1)
Published: March 3, 2025
Avian
β-defensins
(AvBDs)
represent
a
key
family
of
antimicrobial
host
defense
peptides
in
birds.
Accumulating
evidence
suggests
that
the
evolutionary
trajectory
β-defensin
genes
is
specific
to
gene,
timescale,
and
species
involved,
implying
species-specific
ecological
life-history
differences
drive
divergent
selective
pressures
on
these
genes.
However,
their
dynamics,
particularly
interactions
with
factors
traits,
remain
insufficiently
explored.
Through
comprehensive
survey
25
spanning
all
major
clades
Galliformes,
354
AvBD
were
identified.
Comparative
sequence
analysis,
genomic
organization,
phylogenetic
studies
collectively
reveal
significant
diversification
characterized
by
gene
duplication,
pseudogenization,
loss
across
species.
Notably,
chicken
AvBD3
exhibits
its
coding
regions,
while
AvBD6
AvBD7
appear
have
copy
number
variations,
paralogs
being
especially
prominent.
Moreover,
positive
selection
was
more
frequently
observed
recently
diverged
lineages
compared
ancestral
ones.
Using
70
samples
from
eight
galliform
species,
study
further
identified
prevalence
amino
acid
alleles.
Phylogenetic
comparative
analysis
demonstrated
evolution
nine
(AvBD2,
-4,
-5,
-8,
-9,
-10,
-11,
-12,
-14)
significantly
associated
characteristics.
Additionally,
rates
showed
distinct
relationship
inferred
infection
risk,
likely
reflecting
multifunctionality
potential
trade-offs
between
immune
other
biological
functions.
This
cross-species
identification
systematic
AvBDs
Galliformes
deepen
our
understanding
co-evolution
peptides,
offering
valuable
insights
into
natural
biology
evolution,
paving
way
for
future
applications
as
alternatives
traditional
antibiotics.
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(7)
Published: June 29, 2024
Abstract
Migratory
birds
experience
changes
in
their
environment
and
diet
during
seasonal
migrations,
thus
requiring
interactions
between
gut
microbes.
Understanding
the
co‐evolution
of
host
microbiota
is
critical
for
elucidating
rapid
adaptations
avian
microbiota.
However,
dynamics
microbial
concerning
elevational
migratory
behavior,
which
prevalent
but
understudied
montane
remain
poorly
understood.
We
focused
on
Himalayan
bluetail
(
Tarsiger
rufilatus
)
forests
Mt.
Gongga
to
understand
diet–gut
birds.
Our
findings
indicate
that
movements
can
rapidly
alter
composition
function
within
a
month.
There
was
significant
interaction
an
animal‐based
across
migration
stages,
underscoring
importance
shaping
communities.
Furthermore,
T.
may
be
potentially
altered
by
high‐altitude
acclimatization.
An
increase
fatty
acid
amino
metabolism
observed
response
low
temperatures
limited
resources,
resulting
enhanced
energy
extraction
nutrient
utilization.
Moreover,
communities
distinct
segments
varied
relative
abundance
responses
environmental
changes.
While
bird
jejunum
exhibited
greater
susceptibility
food
fluctuations,
there
no
difference
metabolic
capacity
among
segments.
This
study
provides
initial
evidence
highlights
sample
collection.
provide
deeper
understanding
unique
adaptation
patterns
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(9)
Published: Aug. 29, 2024
Invertebrates
greatly
support
the
growth,
development,
and
reproduction
of
insectivorous
birds.
However,
influence
human
activity
(e.g.,
pesticide
use,
deforestation,
urbanization)
inevitably
leads
to
a
decrease
in
global
arthropods.
The
diversity
variation
invertebrate
diet
food
composition
birds,
especially
species
living
rapidly
changing
environments,
such
as
Tibetan
Plateau.
little
is
known
seasonal
response
environmental
changes.
Here,
we
characterized
pre-
post-breeding
black-necked
crane
(