Experimentally broadcast ocean surf and river noise alters birdsong

PeerJ, Год журнала: 2022, Номер 10, С. e13297 - e13297

Опубликована: Май 17, 2022

Anthropogenic noise and its effects on acoustic communication have received considerable attention in recent decades. Yet, the natural environment’s influence role shaping signals remains unclear. We used large-scale playbacks of ocean surf coastal areas whitewater river riparian to investigate how sounds influences song structure six songbird species. recorded individuals defending territories a variety conditions across 19 study sites California 18 Idaho. Acoustic characteristics included naturally quiet ‘control’ sites, ‘positive control’ that were adjacent or thus noisy, ‘phantom’ playback exposed continuous broadcast low-frequency noise, ‘shifted’ with shifted up frequency. predicted spectral temporal would generally correlate background sound amplitude signal features differ site types based profile environment. found ways which varied acoustics quite variable from species For instance, Idaho both frequency bandwidth duration lazuli bunting ( Passerina amoena ) sparrow Melospiza melodia songs decreased elevated but these unrelated warbling vireo Vireo gilvus ), tended increase minimum maximum amplitude. In California, trill white-crowned Zonotrichia leucophrys amplitude, matching results previous studies involving anthropogenic noise. contrast, wrentit Chamaea fasciata was positively related Although responses heterogeneous, all and/or Collectively, provide strong evidence soundscapes long influenced vocal behavior. More broadly, evolved behavioral long-standing challenges presented by sources likely explain many observed for communicating difficult human-made

Язык: Английский

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The effects of anthropogenic noise on feeding behaviour in black-capped chickadees (Poecile atricapillus)

Behavioural Processes, Год журнала: 2018, Номер 158, С. 53 - 58

Опубликована: Ноя. 12, 2018

Язык: Английский

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Social context and noise affect within and between male song adjustments in a common passerine

Behavioral Ecology, Год журнала: 2020, Номер 31(5), С. 1150 - 1158

Опубликована: Июнь 16, 2020

Abstract Across populations, animals that inhabit areas with high anthropogenic noise produce vocalizations differ from those inhabiting less noisy environments. Such patterns may be due to individuals rapidly adjusting their songs in response changing noise, but individual variation is seldom explored. Therefore, we tested the hypothesis male house wrens (Troglodytes aedon) immediately adjust according and social context further modifies responses. We recorded songs, quantified defined within pairs as female fertile status between males number of conspecific neighbors. used a reaction-norm approach compare song trait intercepts (between-male effects) slopes (within-male function noise. Individuals adjusted duration How they achieved adjustments varied: some sang shorter others longer greater varied extent which duration. Variation could affected by competition between-male levels interacted neighbors affect syllable Neither within- nor effects were detected for frequency traits. Rather, mates lower-frequency increased peak more Among males, not frequency, whereas temporal structure depending on factors. Not all signals same way selection favor different

Язык: Английский

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The effects of anthropogenic noise and urban habitats on song structure in a vocal mimic; the gray catbird (Dumetella carolinensis) sings higher frequencies in noisier habitats

Frontiers in Ecology and Evolution, Год журнала: 2023, Номер 11

Опубликована: Дек. 20, 2023

In urban and human-modified landscapes, animals face novel selection pressures resulting from differences in habitat structure increased anthropogenic noise. Urban noise pollution can negatively impact songbirds because low-frequency often masks portions of birds’ mating signals reduces signal transmission. Previous research has demonstrated that the songs birds more habitats have structural enhance transmission when is present. The majority these studies focused on species deliver short, stereotyped limited repertoires. Gray catbirds ( Dumetella carolinensis , family: Mimidae) sing long bouts containing imitated, improvised, invented song elements, therefore may an ability to vary response We hypothesized aspects developed including loud changes land cover would catbirds’ parameters, minimum, peak, maximum frequency, frequency bandwidth, entropy. recorded processed 42 male analyzed over 18,000 elements sites along gradient western Virginia Washington, DC metropolitan region. quantified intensity at each site-centroid based percent canopy cover, impervious surface, level. Song features such as maximum, peak significantly levels increased, demonstrating noisier areas higher compared individuals quieter habitats. Land variables also predicted certain (impervious surface) or entropy (canopy cover). These catbird limit negative effects environmental noise-masking, even for their bouts, suggest vocal mimics respond Future could investigate repertoire size composition if lead functional consequences mimics.

Язык: Английский

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Singing under glass: rapid effects of anthropogenic habitat modification on song and response behaviours in an isolated house sparrow Passer domesticus population

Journal of Avian Biology, Год журнала: 2019, Номер 51(3)

Опубликована: Дек. 20, 2019

Anthropogenic noise pollution and the introduction of novel infrastructure can impose strong selective pressures on avian communication by affecting efficacy with which acoustic signals are transmitted received. Many species have now been shown to sing at higher frequencies in noisy urban environments. However, few studies investigated effects signal modification response behaviours receivers, fewer still able indicate timescale over these changes pitch occurred. We compare vocal between house sparrows Passer domesticus that reside within world's largest, single‐span glasshouse (completed year 2000), directly outside this glasshouse, open farmland. The contrasts both acoustically physically external environment, low frequency background being significantly louder inside than outside. show minimum song was surrounding farm habitat. Using playback, we also found birds reacted more strongly playbacks from habitat they did playback degree difference is similar for other bird rural environments, demonstrating such behavioural differences may arise a relatively short time period (14 yr case).

Язык: Английский

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