Climate change is leading to an ecological trap in a migratory insect
Proceedings of the National Academy of Sciences,
Journal Year:
2025,
Volume and Issue:
122(9)
Published: Feb. 24, 2025
Many
insect
migrants
rely
on
favorable
seasonal
winds
to
carry
out
long-range
latitudinal
migrations.
In
East
China,
the
annual
advance
and
retreat
of
Asian
summer
monsoon
produces
ideal
conditions
for
range
expansion
contraction
many
migratory
crop
pests.
However,
climate-induced
changes
in
strength,
timing,
location
are
impacting
wind
systems
which
may,
turn,
affect
migration
patterns.
We
investigated
these
questions
rice
leafroller
(RLR)
moth,
a
severe
pest
that
annually
invades
Lower
Yangtze
River
Valley
(LYRV)
China
from
winter-breeding
areas
further
south.
Using
24-y
dataset
RLR
population
dynamics
31
monitoring
stations
across
Southeast
we
impact
regimes
fall
patterns
pest.
Historically,
emigrated
LYRV
South
favorably
directed
produced
by
at
end
outbreak
season
(from
mid-August
onward).
show
recent
12-y
period,
prevailing
late-season
remain
northward
longer
than
previously,
preventing
locally
moths
emigrating
southward.
Additionally,
now
facilitate
mass
immigrations
into
LYRV,
creating
an
ecological
trap,
as
immigrants
do
not
have
time
produce
another
generation.
As
consequence
changing
patterns,
pressure
is
declining,
result
becoming
riskier
strategy.
Such
implications
windborne
migrants,
ecosystem
functioning,
management
strategies.
Language: Английский
Migrating hoverflies as potential food source for co-migrating insectivorous birds
Royal Society Open Science,
Journal Year:
2025,
Volume and Issue:
12(3)
Published: March 1, 2025
Most
migrating
birds
must
replenish
energy
reserves
during
migration.
Food
availability
significantly
influences
migratory
routes
and
can
even
force
migrants
to
detour,
but
still
little
is
known
about
potential
co-migration
between
insectivorous
their
insect
prey.
To
address
this
gap,
we
focused
on
day-flying
insects
the
through
Červenohorské
sedlo
mountain
pass,
Czech
Republic.
During
four
seasons
of
bird
trapping,
using
Malaise
trap
mist-nets,
respectively,
recorded
23
094
80
species
35
087
hoverflies
(Syrphidae)
47
species.
We
found
a
strong
temporal
correlation
number
crossing
pass.
The
observed
pattern
suggests
that
similar
phenomenon
may
occur
in
lowlands,
where
both
groups
stop
over
before
after
mountains.
These
stopovers
provide
with
abundant
reliable
food
resources.
also
comprised
88%
biomass
all
trapped
insects,
making
them
most
prey
birds.
Our
results
outline
shed
light
possible
predator–prey
dynamics
Language: Английский
Lords of the flies: dipteran migrants are diverse, abundant and ecologically important
Biological reviews/Biological reviews of the Cambridge Philosophical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
ABSTRACT
Insect
migrants
are
hugely
abundant,
with
recent
studies
identifying
the
megadiverse
order
Diptera
as
major
component
of
many
migratory
assemblages.
Despite
this,
their
behaviour
has
been
widely
overlooked
in
favour
more
‘charismatic’
migrant
insects
such
butterflies,
dragonflies,
and
moths.
Herein
we
review
available
literature
on
dipteran
migration
to
determine
its
prevalence,
identify
key
routes
elucidate
areas
that
may
prove
fruitful
for
future
research.
Using
13
lines
evidence
behaviour,
determined
species
from
60
out
130
families
show
migration,
Syrphidae
fulfilling
12
these
criteria,
followed
by
Tephritidae
10.
By
contrast,
22
met
just
two
criteria
or
fewer,
underlining
need
research
into
characteristics
groups.
In
total,
592
were
identified
potentially
migratory,
making
them
most
speciose
group
insect
yet
described.
only
0.5%
found
be
migrants,
a
figure
rising
3%
Syrphidae,
percentage
mirrored
other
taxa
noctuid
moths,
bats.
Research
was
biased
locations
Europe
(49%
publications)
while
vast
regions
remain
understudied,
our
flyways
used
across
all
biogeographic
realms.
Finally,
highlight
an
unsurpassed
level
ecological
diversity
within
including
roles
huge
economic
value.
Overall,
this
highlights
how
little
is
known
about
vital
health
global
ecosystems.
Language: Английский
Floral visitation of European honey bees and hoverflies in selected cultivated cucurbitaceous crops in Morogoro, Eastern-Central Tanzania
PLoS ONE,
Journal Year:
2025,
Volume and Issue:
20(5), P. e0322219 - e0322219
Published: May 12, 2025
Cucurbit
production
in
many
parts
of
the
world
is
constrained
by
absence
effective
pollinators.
Due
to
decline
European
honey
bees
(
Apis
mellifera
),
main
pollinators
cucurbits,
there
a
need
explore
other
cucurbits
flowers
visiting
insects
supplement
pollination
services
and
for
their
conservation.
Studies
were
carried
out
two
agroecological
zones
Morogoro
Region,
Eastern
-
Central
Tanzania.
We
assessed
visitation
abundance,
frequency
rate
four
under
family
Syrphidae
[
Eristalinus
megacephalus,
Mesembrius
caffer,
Paragus
borbonicus
Toxomerus
floralis
]
A.
on
cucumber
Cucumis
sativus
watermelon
Citrullus
lanatus
)
squash
Cucurbita
moschata
).
Field
trials
conducted
5
×
3
2
factorial
arrangement
randomized
complete
block
design
seasons.
Results
showed
significant
effects
interaction
between
cucurbit
species
season
p
<
0.0001)
flower
species.
was
dominant
at
both
during
growing
Given
its
relatively
higher
visitation,
T.
promising
hoverfly
be
explored
role
C.
.
Agroecological
zone,
determined
hoverflies
flowers.
growers
are
suggested
employ
management
practices
farms
that
favour
abundance
foraging
activities
these
improved
sustainable
production.
Language: Английский