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Author |
Dominoni, D.M.; Helm, B.; Lehmann, M.; Dowse, H.B.; Partecke, J. |
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Title |
Clocks for the city: circadian differences between forest and city songbirds |
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Journal Article |
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Year |
2013 |
Publication |
Proceedings. Biological Sciences / The Royal Society |
Abbreviated Journal |
Proc Biol Sci |
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Volume |
280 |
Issue |
1763 |
Pages |
20130593 |
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Keywords |
Animals; Circadian Clocks/*physiology; Circadian Rhythm; Cities; *Ecosystem; Light; Male; Songbirds/classification/*physiology; Trees; Urbanization; birds; chronotype; circadian rhythms; light at night; radio-telemetry; urbanization |
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Abstract |
To keep pace with progressing urbanization organisms must cope with extensive habitat change. Anthropogenic light and noise have modified differences between day and night, and may thereby interfere with circadian clocks. Urbanized species, such as birds, are known to advance their activity to early morning and night hours. We hypothesized that such modified activity patterns are reflected by properties of the endogenous circadian clock. Using automatic radio-telemetry, we tested this idea by comparing activity patterns of free-living forest and city European blackbirds (Turdus merula). We then recaptured the same individuals and recorded their activity under constant conditions. City birds started their activity earlier and had faster but less robust circadian oscillation of locomotor activity than forest conspecifics. Circadian period length predicted start of activity in the field, and this relationship was mainly explained by fast-paced and early-rising city birds. Although based on only two populations, our findings point to links between city life, chronotype and circadian phenotype in songbirds, and potentially in other organisms that colonize urban habitats, and highlight that urban environments can significantly modify biologically important rhythms in wild organisms. |
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Department of Migration and Immuno-ecology, Max Planck Institute for Ornithology, Radolfzell 78479, Germany. ddominoni@orn.mpg.de |
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0962-8452 |
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PMID:23740778; PMCID:PMC3774226 |
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IDA @ john @ |
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42 |
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Author |
Gaston, K.J. |
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Title |
Sustainability: A green light for efficiency |
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Journal Article |
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Year |
2013 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
497 |
Issue |
7451 |
Pages |
560-561 |
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Keywords |
Editorial; Animals; Atmosphere/chemistry; Carbon Dioxide/analysis; Circadian Rhythm/physiology; Conservation of Energy Resources/economics/*methods/*trends; Global Warming/prevention & control; Humans; Lighting/*economics/instrumentation/statistics & numerical data/*trends; Public Health |
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Environment and Sustainability Institute, University of Exeter, Penryn, UK. k.j.gaston@exeter.ac.uk |
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0028-0836 |
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PMID:23719447 |
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LoNNe @ christopher.kyba @ |
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459 |
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Author |
Owens, B. |
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Title |
Obesity: heavy sleepers |
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Journal Article |
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2013 |
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Nature |
Abbreviated Journal |
Nature |
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497 |
Issue |
7450 |
Pages |
S8-9 |
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Human Health; Animals; Body Mass Index; CLOCK Proteins/genetics/metabolism; Circadian Rhythm/physiology; Energy Metabolism/*physiology; Ghrelin/metabolism; Humans; Insulin Resistance/physiology; Leptin/metabolism; Male; Mice; Obesity/*physiopathology; Satiety Response/physiology; Sleep/*physiology; Suprachiasmatic Nucleus/physiology; Time Factors; Weight Gain/physiology; Weight Loss/physiology |
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0028-0836 |
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PMID:23698508 |
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LoNNe @ christopher.kyba @ |
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503 |
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Czeisler, C.A. |
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Title |
Perspective: casting light on sleep deficiency |
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Journal Article |
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2013 |
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Nature |
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Nature |
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Volume |
497 |
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7450 |
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S13 |
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Human Health; Circadian Rhythm/physiology/radiation effects; Electricity/adverse effects; Humans; Jet Lag Syndrome/etiology/physiopathology/therapy; Lighting/*adverse effects; Melatonin/metabolism/secretion; Phototherapy; Sleep Deprivation/epidemiology/*etiology/*physiopathology/therapy; Suprachiasmatic Nucleus/physiology/radiation effects |
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Division of Sleep Medicine, Harvard Medical School, and Division of Sleep Medicine, Department of Medicine, Brigham and Women's Hospital, in Boston, Massachusetts, USA. charles_czeisler@hms.harvard.edu |
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0028-0836 |
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PMID:23698501 |
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LoNNe @ christopher.kyba @ |
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499 |
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Author |
Eisenstein, M. |
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Title |
Chronobiology: stepping out of time |
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2013 |
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Nature |
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Nature |
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Volume |
497 |
Issue |
7450 |
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S10-2 |
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Human Health; Animals; Benzofurans/therapeutic use; CLOCK Proteins/genetics/metabolism; Circadian Rhythm/genetics/*physiology; Cyclopropanes/therapeutic use; Efficiency/physiology; Humans; Melatonin/agonists/metabolism; Obesity/metabolism; Sleep/genetics/*physiology; Suprachiasmatic Nucleus/metabolism |
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0028-0836 |
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PMID:23698500 |
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LoNNe @ christopher.kyba @ |
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500 |
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