Factors affecting heat resilience of drone honey bees (Apis mellifera) and their sperm
PLoS ONE,
Год журнала:
2025,
Номер
20(2), С. e0317672 - e0317672
Опубликована: Фев. 7, 2025
Extreme
temperatures
associated
with
climate
change
are
expected
to
impact
the
physiology
and
fertility
of
a
variety
insects,
including
honey
bees.
Most
previous
work
on
this
topic
has
focused
female
bees
(workers
queens),
comparatively
little
research
investigated
how
heat
exposure
affects
males
(drones).
To
address
gap,
we
tested
body
mass,
viral
infections,
population
origin
as
predictors
drone
survival
sperm
viability
in
series
challenge
assays.
We
found
that
individual
mass
was
highly
influential,
heavier
drones
being
more
likely
survive
(4
h
at
42°C)
than
smaller
drones.
In
separate
experiment,
compared
Northern
California
Southern
response
same
42°C),
Californian
-
which
enriched
for
African
ancestry
were
originating
from
California.
avoid
survivor
bias,
conducted
challenges
using
vitro
assays
remarkable
variation
resilience
among
sourced
different
commercial
beekeeping
operations,
some
exhibiting
no
reduction
after
others
75%
viability.
Further
investigating
potential
causal
factors
such
variation,
association
between
assays,
but
virus
inoculation
(with
Israeli
acute
paralysis
virus)
exacerbated
negative
effect
These
experiments
establish
vital
framework
understanding
importance
comorbidities
sensitivity.
Язык: Английский
Population structure varies among 4 western North American bumble bee species
Insect Systematics and Diversity,
Год журнала:
2025,
Номер
9(1)
Опубликована: Янв. 1, 2025
Abstract
Bumble
bees
(Hymenoptera:
Apidae,
Bombus
Latreille,
1802)
are
critical
pollinators—providing
the
necessary
ecological
services
for
food
and
crop
production.
In
western
North
America,
species-rich
bumble
bee
communities
inhabit
mountain
ranges.
However,
as
climate
change
increases
temperatures,
montane
populations
restricted
to
higher
elevations,
their
ability
disperse
maintain
genetic
diversity
decreases
suitable
habitat
connecting
decreases.
This
isolation
could
lead
extirpation
of
local
pollinator
a
loss
species.
We
analyzed
4
broadly
sympatric
species
with
differing
elevational
niches—Bombus
flavifrons,
B.
melanopygus,
mixtus,
sylvicola—across
Rocky
Cascade
Mountains
America
assess
range-wide
population
structure.
used
microsatellite
markers
differentiation
among
(FST)
performed
Bayesian
clustering
analyses
identify
groups
within
each
study
Further,
we
investigated
if
observed
was
better
explained
by
distance
(IBD)
or
resistance
(IBR)
incorporating
suitability
models
(HSMs)
into
structure
analyses.
Although
expected
more
narrow
niche
requirements,
found
evidence
this
all
species,
experiencing
significant
relative
inland
populations.
Additionally,
IBR
predicted
than
IBD
flavifrons
mixtus.
Our
results
suggest
that
considering
connectivity
across
geographic
range
is
important
understanding
structures.
Язык: Английский
Climate Change Impacts on Diapause Outcomes in Bombus terrestris Across an Environmental Gradient
Journal of Applied Entomology,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 27, 2025
ABSTRACT
Most
temperate
insects
survive
winter
by
entering
a
period
of
dormancy
called
diapause.
Some
the
greatest
climate
change
impacts
are
likely
to
occur
during
this
period,
as
entire
populations
some
species
represented
relatively
small
number
hibernating
individuals.
Bumblebee
particularly
vulnerable
because
only
queens
overwinter
and
any
decline
in
survival
queens,
or
reduced
post‐diapause
fitness,
could
have
significant
consequences
on
population
dynamics
following
spring.
This
study
investigated
impact
different
overwintering
conditions
Bombus
terrestris
across
an
altitudinal
gradient
German
Alps.
Snow
pack
coverage
was
manipulated
simulate
advanced
snow
melt
delayed
melt,
maintained
for
current/control
conditions.
We
found
that
changes
altitude
affect
level
variability
soil
temperature
season
but
these
no
effect
hibernation
(very
high
all
cases)
subsequent
colony
establishment
low
cases).
However,
queen
weight
loss
diapause
did
differ
altitudes,
with
bumblebees
at
lower
levels
being
exposed
higher
more
widely
fluctuating
temperatures,
losing
significantly
weight.
Our
results
therefore
confirm
potential
negative
physiological
exposure
variable
temperatures
diapause,
is
increasingly
common
under
change.
But
we
also
find
resilience
effects,
least
terms
survival,
within
range
experienced
our
experiments.
conclude
further
field
studies
targeted
be
European
over
necessary
anticipate
impacts,
existing
sufficient
many
insects,
even
if
sub‐lethal
levels.
Язык: Английский
Conserved and Unique Protein Expression Patterns Across Reproductive Stage Transitions in Social Hymenopteran Queens
Molecular Ecology,
Год журнала:
2024,
Номер
33(23)
Опубликована: Ноя. 3, 2024
ABSTRACT
Hymenopteran
queens
are
collectively
highly
fecund,
often
long‐lived
individuals
that
undergo
dramatic
physiological
changes
after
they
mate
and
establish
a
nest.
However,
the
degree
to
which
these
conserved
among
species
with
different
life
histories
is
not
well‐defined.
We
conducted
comparative
proteomic
study
investigating
differences
between
reproductive
stages
(virgin,
mated
established
queens)
of
Apis
mellifera
,
Bombus
impatiens
B.
terrestris
Lasius
niger
.
analysed
haemolymph
for
all
except
L.
whole‐body
analysis
was
performed
due
small
size
queens.
identified
upregulation
proteins
involved
in
anatomical
system
development
as
transition
establishing
nest
also
patterns
vitellogenin,
vitellogenin
receptor
immune‐responsive
protein
(IRP)30,
typically
associated
oviposition.
expression
other
immune
proteins,
heat‐shock
(HSPs),
detoxification
enzymes
antioxidant
were
more
dissimilar,
some
exhibiting
similar
trends
co‐occurrence
through
stages,
while
others
exhibited
variable
or
opposite
patterns.
These
unique
profiles
likely
part
reflect
similarities
selective
pressure
on
each
may
indicate
differing
abilities
respond
emergent
pathogens
environmental
change.
Язык: Английский
Leveraging Transcriptional Signatures of Diverse Stressors for Bumble Bee Conservation
Molecular Ecology,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 13, 2024
ABSTRACT
Organisms
in
nature
are
subjected
to
a
variety
of
stressors,
often
simultaneously.
Foremost
among
stressors
key
pollinators
pathogens,
poor
nutrition
and
climate
change.
Landscape
transcriptomics
can
be
used
decipher
the
relative
role
provided
there
unique
signatures
stress
that
reliably
detected
field
specimens.
In
this
study,
we
identify
biomarkers
bumble
bee
(
Bombus
impatiens
)
responses
by
first
subjecting
bees
various
short‐term
(cold,
heat,
pathogen
challenge)
laboratory
setting
assessing
their
transcriptome
responses.
Using
random
forest
classification
on
whole
data,
were
able
discriminate
each
stressor.
Our
best
model
(tissue‐specific
trained
subset
important
genes)
correctly
predicted
known
with
92%
accuracy.
We
then
applied
wild‐caught
sampled
across
heatwave
event
at
two
sites
central
Pennsylvania,
US,
expected
differ
baseline
temperature
floral
resource
availability.
Transcriptomes
during
heat
wave's
peak
showed
stress,
while
collected
relatively
cooler
morning
periods
starvation
cold
stress.
failed
pick
up
signals
shortly
after
heatwave,
suggesting
set
is
more
useful
for
identifying
acute
than
long‐term
monitoring
chronic,
landscape‐level
stressors.
highlight
future
directions
fine‐tune
landscape
towards
development
better
both
conservation
improving
understanding
stressor
impacts
bees.
Язык: Английский
Bees remain heat tolerant after acute exposure to desiccation and starvation
Journal of Experimental Biology,
Год журнала:
2024,
Номер
227(24)
Опубликована: Дек. 15, 2024
ABSTRACT
Organisms
may
simultaneously
face
thermal,
desiccation
and
nutritional
stress
under
climate
change.
Understanding
the
effects
arising
from
interactions
among
these
stressors
is
relevant
for
predicting
organisms'
responses
to
change
developing
effective
conservation
strategies.
Using
both
dynamic
static
protocols,
we
assessed
first
time
how
sublethal
exposure
(at
16.7%,
50.0%
83.3%
of
LD50)
impacts
heat
tolerance
foragers
two
social
bee
species
found
on
Greek
island
Lesbos:
managed
European
honey
bee,
Apis
mellifera,
wild,
ground-nesting
sweat
Lasioglossum
malachurum.
In
addition,
explored
a
short-term
starvation
period
(24
h),
followed
by
moderate
(50%
LD50),
influences
tolerance.
We
that
neither
critical
thermal
maximum
(CTmax)
nor
stupor
was
significantly
impacted
in
either
species.
Similarly,
did
not
affect
average
CTmax
estimate,
but
it
increase
its
variance.
Our
results
suggest
environmental
always
lead
significant
changes
bees'
or
vulnerability
rapid
temperature
during
extreme
weather
events,
such
as
waves.
However,
variance
suggests
greater
variability
individual
change,
which
impact
colony-level
performance.
The
ability
withstand
be
unmeasured
hypoxic
conditions
overall
effect
solitary
remains
assessed.
Язык: Английский
Agroecological Strategies for Insect Pollinator Conservation
Advances in environmental engineering and green technologies book series,
Год журнала:
2024,
Номер
unknown, С. 75 - 106
Опубликована: Ноя. 29, 2024
In
the
face
of
intensifying
climate
change,
resilience
agricultural
systems
and
food
security
depend
on
health
diversity
insect
pollinators.
This
chapter
presents
a
nuanced
exploration
multifaceted
impacts
change
pollinators,
including
geographic
range
shifts,
phenological
changes,
altered
interspecies
interactions,
which
collectively
threaten
pollination
services
and,
by
extension,
crop
yields
human
nutrition.
The
proposal
an
integrated
agroecological
socioeconomic
approach
to
pollinator
conservation
is
at
heart
this
discourse.
also
highlights
economic
social
benefits
proposes
policy
recommendations
that
align
with
national
strategies
international
environmental
commitments.
Through
synthesis
current
research
case
studies,
identifies
critical
knowledge
gaps
defines
future
directions,
emphasizing
need
for
comprehensive
monitoring
assessment
populations
they
provide.
Язык: Английский