Effects of Light Pollution and Environmental Factors on Dawn Song Initiation Time of Great Tit, Parus major

Ki, Kyong–Seok; Cho, Woo

doi:10.13047/kjee.2014.28.4.411

Cited by 6 publications

(4 citation statements)

References 38 publications

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“…Our findings are also in direct contrast to predictions based on other potential selective forces acting on eye size. For instance, urban birds have exhibited shifts in their dawn chorus, singing earlier in the morning in response to anthropogenic factors such as artificial light at night and noise (Da Silva et al, 2014; Ki & Cho, 2014; Nordt & Klenke, 2013; but see Marín‐Gómez & Macgregor‐Fors, 2021). If light is the major factor driving shifts in dawn song, then larger, light gathering eyes could allow birds to start their dawn chorus earlier and reap additional reproductive benefits.…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Phenotypic signatures of urbanization? Resident, but not migratory, songbird eye size varies with urban‐associated light pollution levels

Jones,

Llamas,

Phillips

2023

Global Change Biology

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Urbanization now exposes large portions of the earth to sources of anthropogenic disturbance, driving rapid environmental change and producing novel environments. Changes in selective pressures as a result of urbanization are often associated with phenotypic divergence; however, the generality of phenotypic change remains unclear. In this study, we examined whether morphological phenotypes in two residential species (Carolina Wren [Thryothorus ludovicianus] and Northern Cardinal [Cardinalis cardinalis]) and two migratory species (Painted Bunting [Passerina ciris], and White‐eyed Vireo [Vireo griseus]), differed between urban core and edge habitats in San Antonio, Texas, USA. More specifically, we examined whether urbanization, associated sensory pollution (light and noise) and brightness (open, bright areas cause by anthropogenic land use) influenced measures of avian body (mass and frame size) and lateral eye size. We found no differences in body size between urban core and edge habitats for all species except the Painted Bunting, in which core‐urban individuals were smaller. Rather than a direct effect of urbanization, this was due to differences in age structure between habitats, with urban‐core areas consisting of higher proportions of younger buntings which are, on average, smaller than older birds. Residential birds inhabiting urban‐core areas had smaller eyes compared to their urban‐edge counterparts, resulting from a negative association between eye size and light pollution and brightness across study sites; notably, we found no such association in the two migratory species. Our findings demonstrate how urbanization may indirectly influence phenotypes by altering population demographics and highlight the importance of accounting for age when assessing factors driving phenotypic change. We also provide some of the first evidence that birds may adapt to urban environments through changes in their eye morphology, demonstrating the need for future research into relationships among eye size, ambient light microenvironment use, and disassembly of avian communities as a result of urbanization.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Phenotypic signatures of urbanization? Resident, but not migratory, songbird eye size varies with urban‐associated light pollution levels

Jones,

Llamas,

Phillips

2023

Global Change Biology

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“…For example, American Robins sing much earlier during moonlight at the beginning of spring but not during summer (Leopold & Enyon 1961). However, other studies have shown no correlation between dawn chorus onset and lunar phase or cloud cover in urban settings (Ki & Cho 2014, Ki et al 2015. Perhaps the most important meteorological variable related to dawn chorus timing is variation of light intensity at dawn.…”

Section: Meteorological Factorsmentioning

confidence: 94%

“…Correlative studies of ALAN have provided evidence of earlier dawn chorus onsets in light-polluted urban sites (Miller 2006, Shihan 2010, Nordt & Klenke 2013, Ki & Cho 2014, which also interact synergistically with noise pollution (Bergen & Abs 1997, Nordt & Klenke 2013, Dominoni et al 2020a. Given that songbirds are capable of adjusting their dawn chorus onsets to variations of both natural and artificial light levels (Leopold & Enyon 1961, Da Silva et al 2016, Lee et al 2017, the effects of ALAN are expected to be strong in cities at high latitudes where the daily photoperiod varies across the year (Da ).…”

Section: Light Pollutionmentioning

confidence: 99%

A global synthesis of the impacts of urbanization on bird dawn choruses

Marín-Gómez

MacGregor-Fors

2021

Ibis

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Urbanization drives changes in acoustic communication systems in some animal species. Noise and light pollution are among the main urban factors known to disrupt the timing and structure of avian singing behaviour. Despite our understanding of the ways in which urbanization can drive variations in avian acoustic communication, our ability to generalize the underlying causes of such variation and its consequences is still limited. Here, we reviewed the literature focused on the study of avian dawn choruses in urban settings at a global scale. Our findings reveal that avian dawn chorus research has focused on the impact of anthropogenic noise on dawn chorus traits (i.e. timing, peak, song output, song frequencies); relationships between light pollution and chorus timing; the effects of temperature, cloudiness, moonlight and natural light on chorus timing; relationships between nocturnal noise and light, and dawn chorus timing; the effects of chemical pollution and supplementary feeding on dawn chorus activity; and ecological patterns of dawn choruses in soundscapes across urban-non-urban gradients. We identified important knowledge gaps in the study of avian dawn choruses in urban settings and thus suggest future research directions, including frameworks (e.g. the urbanization intensity gradient) and consideration of a wider array of urban conditions and variables. Given the complexity of urban settings, we encourage further studies to address the role that all sources of pollution can have on avian acoustic communication at dawn. Additionally, a central question to resolve is whether the function of avian dawn choruses in urban areas differs, and if so how, from non-urban counterparts. Given that most research has been performed across Holarctic cities and towns, studies from tropical and subtropical regions are needed if we aim to understand the phenomenon globally. Finally, studies at the community-and soundscape-level across cities could advance understanding of the way in which urban birds use the acoustic space during the most critical singing time period, dawn.

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Temporal Changes of Hyalessa fuscata Songs by Climate Change

Kim¹,

Ki²

2018

Korean J. Environ. Ecol.

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Effects of Light Pollution and Environmental Factors on Dawn Song Initiation Time of Great Tit, Parus major

Cited by 6 publications

References 38 publications

Phenotypic signatures of urbanization? Resident, but not migratory, songbird eye size varies with urban‐associated light pollution levels

Phenotypic signatures of urbanization? Resident, but not migratory, songbird eye size varies with urban‐associated light pollution levels

A global synthesis of the impacts of urbanization on bird dawn choruses

Temporal Changes of Hyalessa fuscata Songs by Climate Change

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