Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Сен. 18, 2023
Abstract
The
impact
of
urbanization
on
biodiversity
is
often
underestimated,
as
in
the
case
noise
pollution
generated
by
anthropic
activities.
Birds
inhabiting
urban
and
peri-urban
areas
are
exposed
to
noisy
environments
that
make
communication
difficult.
We
evaluate
how
anthropogenic
sounds
associated
with
(automobiles,
airplanes,
helicopters)
affect
song
four
disparate
bird
species
Andean-Patagonian
Forest:
Thorn-tailed
Rayadito(
Aphrastura
spinicauda
),
White-crested
Elaenia
(
albiceps
Green-backed
Firecrown(
Sephanoides
sephanoides
)
Austral
Parakeet
Enicognathus
ferrugineus
).
Between
October
2021
February
2022
we
placed
audio
recorders
(AudioMoth
v
1.2.0)
wooded
a
city
surrounded
National
Park,
Argentine
Patagonia.
selected
groups
recordings
where
an
individual
was
vocalizing
before,
during
after
occurrence
noise.
From
each
recording,
analyzed
frequency
(minimum,
maximum
dominant
frequency)
temporal
bioacoustic
parameters
(duration
vocalization
pause
length
between
syllables).
found
all
birds
were
affected
noise,
but
responses
varied
species.
Frequency
changed
disturbance
two
studied,
modified
at
least
one
Our
results
showed
produced
human
activities
sound
communication,
therefore
behavior
birds.
Given
increase
over
recent
decades,
consequently
sound,
should
be
considered
disruptor
for
potentially
threat,
even
low
populated
protected
areas.
Ornitología Neotropical,
Год журнала:
2025,
Номер
35(2)
Опубликована: Янв. 18, 2025
Research
on
avian
bioacoustics
in
the
Neotropics
has
surged
over
last
several
decades
due
to
increased
interest
large
diversity
of
vocal
behaviors
and
vocalization
broader
accessibility
recording
equipment
software.
Here,
we
present
a
synthesis
current
past
knowledge
Neotropical
bird
bioacoustics.
This
is
result
symposium
"Bioacoustics
Neotropics",
organized
for
XI
Ornithological
Congress
San
Jose,
Costa
Rica,
July
2019.
We
covered
what
consider
main
topics
that
have
been
studied
this
region
30
years.
Our
review
includes
repertoire
descriptions,
geographic
variation,
behaviors,
seasonality,
duetting,
genetic
association,
playback
experiments.
Additionally,
information
believe
may
be
veins
investigation
coming
future
Neotropics,
considering
species
are
found
new
investigations
developed
other
areas.
expect
work
as
summary
literature
guide
stimulate
research
important
areas
within
field
Neotropics.
Ornitología Neotropical,
Год журнала:
2024,
Номер
35(2)
Опубликована: Дек. 17, 2024
In
animal
acoustic
communication
is
necessary
that
signals
arrive
to
the
receiver
with
reduced
degradation
and
attenuation
for
a
better
transmission
of
message.
The
noise
pollution
resulting
from
anthropogenic
activities
in
cities
reduces
efficiency
efficacy
communication.
Some
species
respond
high
levels
increasing
minimum
frequency
their
vocalizations
avoid
masking,
but
this
may
affect
how
sounds
transmit
environment
because
higher
frequencies
experience
greater
degradation.
Using
experiment,
we
analyzed
shifts,
sound
properties
song
House
Wren
(Troglodytes
aedon)
urban
areas
differ
level
noise.
We
broadcasted
songs
between
1.2-1.8
kHz
same
increment
artificially
one
semitone,
2.1-2.6
kHz,
low
territories
at
four
distances.
quantified
signal-to-noise
ratio,
tail-to-signal
blur
excess
attenuation.
Our
results
showed
lower
ratio
longer
Songs
increased
only
noisier
These
support
hypothesis
producing
shift
increase
distance
environments.
This
first
experimental
study
tests
effect
shifting
on
bird
different
levels.
Environmental Pollution,
Год журнала:
2022,
Номер
303, С. 119144 - 119144
Опубликована: Март 14, 2022
Wind
energy
has
experienced
a
notable
development
during
the
last
decades,
driving
new
challenges
for
animal
communities.
Although
bird
collisions
with
wind
turbines
and
spatial
displacement
due
to
disturbance
have
been
widely
described
in
literature,
other
potential
impacts
remain
unclear.
In
this
study,
we
addressed
effect
of
turbine
noise
on
vocal
behaviour
threatened
shrub-steppe
passerine
highly
dependent
acoustic
communication,
Dupont's
lark
Chersophilus
duponti.
Based
directional
recordings
49
calling
singing
males
exposed
gradient
level
(from
15
up
51
dBA),
tested
differences
signal
diversity,
redundancy,
complexity,
as
well
temporal
spectral
characteristics
their
vocalizations
(particularly
characteristic
whistle).
Our
results
unveiled
that
varied
structure
when
subject
noise,
by
increasing
probability
emitting
more
complex
whistles
(with
increased
number
notes)
shifting
dominant
note
(emphasizing
longest
higher-pitched
note).
addition,
duration
minimum
frequency
specific
notes
whistle,
while
repertoire
size
redundancy
constant.
To
our
knowledge,
is
first
study
reporting
multiple
responses
animals
unveiling
shift
response
anthropogenic
general.
These
findings
suggest
exhibits
some
phenotypic
plasticity,
which
might
enable
species
cope
noisy
environments,
although
adjustments
observed
associated
costs
or
alter
functionality
signal.
Future
projects
must
include
fine-scale
assessments
quantify
consequences
chronic
exposure.
Journal of Raptor Research,
Год журнала:
2024,
Номер
58(2)
Опубликована: Апрель 23, 2024
Acoustic
communication,
such
as
bird
song,
is
vital
in
animal
ecology,
facilitating
reproduction,
feeding,
defense,
and
more.
Variation
song
may
result
from
adaptation
to
environmental
features
anthropogenic
noise.
The
vocal
repertoire
of
raptors
essentially
unstudied,
particularly
urban
environments.
aim
this
work
was
describe
quantify
the
acoustic
Chimango
Caracaras
(Milvago
chimango)
rural
areas
La
Pampa
Province,
Argentina.
I
recorded
26
1-min
sound
samples
at
each
four
breeding
colonies
(one
three
urban)
during
austral
reproductive
season
2021–2022.
241
vocalizations
corresponding
nine
clearly
distinct
call
types.
Two
types
calls
made
up
50.6%
19.5%
seven
others
<10.0%
each.
Three
had
trills
(fast
repetitive
notes).
Average
percentage
differed
significantly
between
two
habitats
(P
<
0.01),
with
more
produced
habitats.
calling
rate
6.6
±
5.1
calls/min
10.7
colonies.
number
different
2.1
1.6
types/min
2.7
1.8
greater
represent
an
attempt
improve
signal
effectiveness
among
clutter.
Journal of Avian Biology,
Год журнала:
2021,
Номер
52(10)
Опубликована: Сен. 14, 2021
Anthropogenic
noise
constrains
the
transmission
of
birdsong
and
alters
behavior
receivers.
Many
birds
adjust
their
acoustic
signals
to
minimize
interference
anthropogenic
on
signal
transmission.
Birds
may
also
change
exchange
information
during
aggressive
interactions.
However,
it
is
unclear
how
deal
with
a
potential
trade‐off
between
adjusting
better
transmit
in
noisy
environments
versus
mediating
Additionally,
we
do
not
know
urbanization
territorial
We
investigated
interplay
among
song,
aggression,
urbanization,
noise,
males
southern
house
wren
Troglodytes
aedon
musculus
,
using
recordings
spontaneous
songs
(non‐aggressive
context)
playback
experiment
simulating
male
intrusion
(aggressive
context).
found
that
urban
wrens
behaved
more
aggressively
response
intruder
by
singing
spent
time
closer
than
rural
regardless
noise.
Males
produced
lower
minimum
frequency
trills
wider
bandwidth
higher
vocal
performance
under
acute
(playback)
relaxed
(post‐playback)
encounters.
These
results
suggest
use
communicate
intent
or
fighting
ability.
Urban
higher‐pitched
irrespective
context.
noisiest
territories
highest‐pitched
but
only
non‐aggressive
Rural
tended
produce
longest
shortest
Results
affects
behaviors
wrens.
this
species
seem
primarily
rather
