Molecular Ecology,
Journal Year:
2024,
Volume and Issue:
33(16)
Published: July 16, 2024
Abstract
In
humans,
gut
microbiome
(GM)
differences
are
often
correlated
with,
and
sometimes
causally
implicated
in,
ageing.
However,
it
is
unclear
how
these
findings
translate
in
wild
animal
populations.
Studies
that
investigate
GM
dynamics
change
within
individuals,
with
declines
physiological
condition,
needed
to
fully
understand
links
between
chronological
age,
senescence
the
GM,
but
have
rarely
been
done.
Here,
we
use
longitudinal
data
collected
from
a
closed
population
of
Seychelles
warblers
(
Acrocephalus
sechellensis
)
bacterial
alpha
diversity,
composition
stability
associated
host
senescence.
We
hypothesised
diversity
will
differ,
become
more
variable,
older
adults,
particularly
terminal
year
prior
death,
as
becomes
increasingly
dysregulated
due
remained
largely
invariable
respect
adult
age
did
not
differ
an
individual's
year.
Furthermore,
there
was
no
evidence
became
heterogenous
senescent
groups
(individuals
than
6
years),
or
Instead,
environmental
variables
such
season,
territory
quality
time
day,
were
strongest
predictors
variation
warblers.
These
results
contrast
studies
on
captive
populations
some
(but
all)
non‐human
primates,
suggesting
deterioration
may
be
universal
hallmark
species.
Further
work
disentangle
factors
driving
GM‐senescence
relationships
across
different
taxa.
Cell Reports,
Journal Year:
2022,
Volume and Issue:
38(3), P. 110203 - 110203
Published: Jan. 1, 2022
Characteristics
of
the
gut
microbiome
vary
synchronously
with
changes
in
host
diet.
However,
underlying
effects
these
fluctuations
remain
unclear.
Here,
we
performed
fecal
microbiota
transplantation
(FMT)
diet-specific
feces
from
an
endangered
mammal
(the
giant
panda)
into
a
germ-free
mouse
model.
We
demonstrated
that
butyrate-producing
bacterium
Clostridium
butyricum
was
more
abundant
during
shoot-eating
season
than
leaf-eating
season,
congruent
significant
increase
body
mass.
Following
season-specific
FMT,
model
resembled
donor,
and
mice
transplanted
grew
faster
stored
fat.
Mechanistic
investigations
revealed
butyrate
extended
upregulation
hepatic
circadian
gene
Per2,
subsequently
increasing
phospholipid
biosynthesis.
Validation
experiments
further
confirmed
this
causal
relationship.
This
study
seasonal
shifts
affect
growth
performance,
facilitating
deeper
understanding
host-microbe
interactions
wild
mammals.
Nature Communications,
Journal Year:
2021,
Volume and Issue:
12(1)
Published: Oct. 14, 2021
Abstract
Circadian
rhythms
in
gut
microbiota
composition
are
crucial
for
metabolic
function,
yet
the
extent
to
which
they
govern
microbial
dynamics
compared
seasonal
and
lifetime
processes
remains
unknown.
Here,
we
investigate
bacterial
wild
meerkats
(
Suricata
suricatta
)
over
a
20-year
period
compare
diurnal,
seasonal,
concert,
applying
ratios
of
absolute
abundance.
We
found
that
diurnal
oscillations
load
eclipsed
dynamics.
Diurnal
were
characterised
by
peak
Clostridium
abundance
at
dawn,
associated
with
temperature-constrained
foraging
schedules,
did
not
decay
age.
Some
genera
exhibited
fluctuations,
whilst
others
developed
age,
although
little
support
senescence
very
old
meerkats.
Strong
circadian
this
species
may
reflect
extreme
daily
temperature
fluctuations
typical
arid-zone
climates.
Our
findings
demonstrate
accounting
is
essential
future
microbiome
research.
Animal Microbiome,
Journal Year:
2022,
Volume and Issue:
4(1)
Published: April 28, 2022
Inter-population
variation
in
host-associated
microbiota
reflects
differences
the
hosts'
environments,
but
this
characterization
is
typically
based
on
studies
comparing
few
populations.
The
diversity
of
natural
habitats
and
captivity
conditions
occupied
by
any
given
host
species
has
not
been
captured
these
comparisons.
Moreover,
intraspecific
gut
microbiota,
generally
attributed
to
diet,
may
also
stem
from
differential
acquisition
environmental
microbes-an
understudied
mechanism
which
microbiomes
are
directly
shaped
microbes.
To
more
comprehensively
characterize
an
ecologically
flexible
host,
ring-tailed
lemur
(Lemur
catta;
n
=
209),
while
investigating
role
acquisition,
we
used
16S
rRNA
sequencing
soil
sampled
up
13
settings,
eight
wilderness
Madagascar
five
or
U.S.
Based
matched
fecal
samples,
microbial
source
tracking
examine
covariation
between
two
types
consortia.The
microbes
varied
markedly
within
settings.
Microbial
was
consistently
greater
wild
than
captive
lemurs,
indicating
that
metric
necessarily
indicator
habitat
condition.
Variation
composition
inconsistent
both
with
a
single,
representative
community
for
conspecifics
universal
'signal
captivity'
homogenizes
consortia
animals.
Despite
similar,
commercial
diets
lemurs
continents,
were
compositionally
most
suggesting
non-dietary
factors
govern
some
variability.
In
particular,
communities
across
geographic
locations,
samples
different
continents
being
distinct,
there
significant
context-specific
microbiota.As
one
broadest,
single-species
investigations
primate
our
study
highlights
sensitive
multiple
scales
differences.
This
finding
begs
reevaluation
simple
'captive
vs.
wild'
dichotomy.
Beyond
important
implications
animal
care,
health,
conservation,
mediate
aspects
further
expands
framework
how
interact
landscapes.
Microbiome,
Journal Year:
2022,
Volume and Issue:
10(1)
Published: Feb. 9, 2022
Various
aspects
of
sociality
can
benefit
individuals'
health.
The
host
social
environment
and
its
relative
contributions
to
the
host-microbiome
relationship
have
emerged
as
key
topics
in
microbial
research.
Yet,
understanding
mechanisms
that
lead
structural
variation
microbiome,
collective
metacommunity
an
animal's
network,
remains
difficult
since
multiple
processes
operate
simultaneously
within
among
animal
networks.
Here,
we
examined
potential
drivers
convergence
gut
microbiome
on
scales
seven
neighbouring
groups
wild
Verreaux's
sifakas
(Propithecus
verreauxi)
-
a
folivorous
primate
Madagascar.
Over
four
field
seasons,
collected
519
faecal
samples
41
animals
determined
communities
via
16S
18S
rRNA
gene
amplicon
analyses.
First,
whether
group
members
share
more
similar
microbiota
if
diet,
home
range
overlap,
or
habitat
similarity
drive
between-group
communities,
accounting
for
seasonality.
Next,
within-group
by
examining
effects
contact
rates,
male
rank,
maternal
relatedness.
To
explore
intrinsic
community
structure,
investigated
age,
sex,
glucocorticoid
metabolites,
female
reproductive
state.
We
found
differ
alpha
diversity,
while
none
environmental
predictors
explained
patterns
variation.
Maternal
relatedness
played
important
role
homogeneity
may
also
explain
why
adult
shared
least
microbiota.
Also,
dominant
males
differed
their
bacterial
composition
from
mates,
which
might
be
driven
rank-related
differences
physiology
scent-marking
behaviours.
Links
state,
metabolites
were
not
detected.
Environmental
factors
define
general
set-up
population-specific
microbiota,
but
stronger
impact
this
species.
Video
abstract.
Animal Microbiome,
Journal Year:
2023,
Volume and Issue:
5(1)
Published: Feb. 10, 2023
Abstract
Background
In
mammals,
the
gut
microbiota
has
important
effects
on
health
of
their
hosts.
Recent
research
highlights
that
animal
populations
live
in
captivity
often
differ
diversity
and
composition
from
wild
populations.
However,
changes
may
occur
when
animals
move
to
remain
difficult
predict
factors
generating
such
differences
are
poorly
understood.
Here
we
compare
bacterial
captive
Damaraland
mole-rats
(
Fukomys
damarensis
)
originating
a
population
southern
Kalahari
Desert
characterise
one
generation
next
long-lived,
social
rodent
species.
Results
We
found
clear
divergence
mole-rats.
Although
dominating
higher-rank
taxa
were
same
two
groups,
had
an
increased
ratio
relative
abundance
Firmicutes
Bacteroidetes
compared
animals.
The
Amplicon
Sequence
Variants
(ASVs)
strongly
associated
with
commonly
members
families
as
those
Captive
much
higher
ASV
richness
wild-caught
animals,
explained
by
within
Firmicutes.
Conclusion
hosts
differs
substantially
largest
between
groups
shifts
abundances
Bacteroidetes.
Frontiers in Microbiology,
Journal Year:
2022,
Volume and Issue:
13
Published: July 7, 2022
Convergent
evolution
is
an
important
sector
of
evolutionary
biology.
High-altitude
environments
are
one
the
extreme
for
animals,
especially
in
Qinghai
Tibet
Plateau,
driving
inquiry
whether,
under
broader
phylogeny,
high-altitude
factors
drive
convergent
Artiodactyla
and
Perissodactyla
gut
microbiomes.
Therefore,
we
profiled
microbiome
at
high
low
altitudes
using
16S
rRNA
gene
sequencing.
According
to
cluster
analyses,
compositions
were
not
grouped
together
far
from
those
low-altitude
Perissodactyla.
The
Wilcoxon’s
test
ungulates
showed
significantly
higher
Sobs
Shannon
indices
than
ungulates.
At
phylum
level,
Firmicutes
Patescibacteria
enriched
microbiomes
ungulates,
which
also
displayed
a
Firmicutes/Bacteroidetes
value
family
Ruminococcaceae,
Christensenellaceae,
Saccharimonadaceae
Our
results
indicated
that
OH
FH
groups
shared
two
genera,
Christensenellaceae_R_7_group
Candidatus_Saccharimonas
.
These
findings
altitude
cannot
surpass
order
level
ungulate
composition
but
can
alpha
diversity
indicator
microbiota
Overall,
this
study
provides
novel
perspective
understanding
adaptation
environments.
Scientific Reports,
Journal Year:
2022,
Volume and Issue:
12(1)
Published: Feb. 16, 2022
The
gut
microbiome
impacts
host
health
and
fitness,
in
part
through
the
diversification
of
metabolic
function
pathogen
protection.
Elevations
glucocorticoids
(GCs)
appear
to
reduce
diversity
experimental
studies,
suggesting
that
a
loss
microbial
may
be
negative
consequence
increased
GCs.
However,
given
ecological
factors
like
food
availability
population
density
independently
influence
both
GCs
diversity,
understanding
how
these
structure
GC-microbiome
relationship
is
crucial
interpreting
its
significance
wild
populations.
Here,
we
used
an
framework
investigate
between
North
American
red
squirrels
(Tamiasciurus
hudsonicus).
As
expected,
higher
predicted
lower
increase
taxa.
Surprisingly,
but
line
with
prior
empirical
studies
on
animals,
gastrointestinal
pathogens
decreased
as
increased.
Both
dietary
heterogeneity
upcoming
pulse
exhibited
direct
effects
whereas
conspecific
reproductive
activity
impacted
indirectly
via
changes
Our
results
provide
evidence
gut-brain
axis
highlight
importance
situating
GC-gut
within
framework.