Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"light at night"”.
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Circadian Disruption by Light at Night: Implications for Mood
… remain synchronized to the environment using light as the most potent entraining cue. During the past century, however, the widespread adoption of electric light has led to `round-the-clock’ societies. Instead of aligning with the environment, individuals follow artificial and often erratic …
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Effects of Artificial Light at Night on Zebra Finch Nocturnal Behavior
With more of the world's population living in urban areas every year, artificial light is becoming an increasingly pervasive pollutant worldwide. It is important to study the potential effects of artificial light at night (ALAN) exposure, particularly on diurnal vertebrates. Previous studies have …
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Effects of artificial light at night on benthic primary producers in freshwaters
… decades, the use of artificial nocturnal illumination has rapidly increased worldwide, imposing an increase of nocturnal light levels and a disruption of natural cycles of light and dark that have been stable over geological and evolutionary time scales. This wide-spread alteration of the natural …
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Light-At-Night and Mood: Examining The Role Of Sex In C57Bl/6 Mice
Rates of major depression have increased substantially in recent years, although it is not currently clear what are the factors behind such increases. Environmental factors may be important, and it has recently been postulated that dim nocturnal light may contribute to depression symptoms in humans …
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Artificial Light at Night Alters Physiology, Behavior, and Reproduction in the Western Mosquitofish (Gambusia affinis)
Human population growth and its associated effects have contributed to the rapid decrease of biodiversity worldwide. Artificial light at night (ALAN) is an anthropogenic pollutant that is increasing with the spread of urbanization and may contribute to biodiversity declines. ALAN alters the …
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Effects of Anthropogenic Light and Noise on Anuran Breeding Behavior
<p>The natural environment can be negatively impacted by a variety of human activities, including the production of artificial light at night and anthropogenic noise. Recent studies suggest that pollution from anthropogenic light and noise alters animal behavior. Despite being highly nocturnal and …
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PHYSIOLOGICAL CONSEQUENCES OF CIRCADIAN DISRUPTION BY NIGHTTIME LIGHT EXPOSURE
… than 3 billion years, life outside the highest latitudes has evolved under brightly illuminated days and dark nights. Most organisms have developed endogenously driven circadian rhythms which are synchronized to this light/dark cycle. In recent years, daily light schedules have become artificial …
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Vliv světelného znečištění na noční motýly (Lepidoptera)
Light pollution, caused by the increasing presence of artificial lighting in nighttime environments, is emerging as a significant ecological stressor. This bachelor thesis focuses on the effects of artificial light at night (ALAN) on moths (Lepidoptera), a taxonomically and ecologically important …
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Markers of Circadian Disruption and Reproductive Risk Factors for Breast Cancer
… has long been linked to breast cancer. The melatonin hypothesis holds that increased exposure to artificial light at night and resulting inhibition of nocturnal melatonin may account for recent increased breast cancer incidence. Coregulation of melatonin, circulating reproductive hormones and …
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After Dark: Reading Canadian Literature in a Light-Polluted Age
A threat to nocturnal ecosystems and human health alike, light pollution is an unnecessary problem that comes at an enormous cost. The International Dark-Sky Association has recently estimated that the energy expended on light scatter alone is responsible for no less than twelve million tons of …
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Urbanization's Effects on Avian Morphology, Hormones, and Behavior Across Ontogeny
As the human population continues to grow at an unprecedented rate, anthropogenic changes are rapidly altering the remaining natural areas of the world. Urban-related stressors, such as lower food availability, the urban heat island, artificial light at night, and other pollution directly impact …
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Circadian disruption causes deficits in attention and response inhibition in adult Long-Evans rats
… disruption is an environmental factor that impacts cognition and increases the risk of neurodegenerative disease by altering the circadian clock at a molecular level. Conventional sources of circadian disruption in human populations include working beyond the regular hours of ‘9 to 5’ …
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Flexibility in extended phenotype sexual signals in great bowerbirds, Chlamydera nuchalis
… a range of traits to signal their quality to attract mates, some of which can be very elaborate. Some individuals signal their quality via an extended phenotype display (an expression of their quality separate from their body). Signallers must adapt their sexual signals following disruption to …
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Seeing the light: germination, growth and flowering responses in wildflowers under artificial nighttime lighting
The introduction of artificial nighttime lighting due to human settlements and transport networks is increasingly altering the timing, intensity and spectra of natural light regimes worldwide. Artificial light at night (ALAN) is predicted to constitute a significant anthropogenic pressure on …
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EFFECTS OF NIGHT SHIFT WORK ON REPRODUCTIVE HEALTHIN A POPULATION OF HEALTHCARE WORKERS
… Il lavoro notturno è definito dalla normativa italiana, in accordo con la regolamentazione europea, come qualsiasi turno della durata di almeno 7 ore consecutive che includa l’intervallo tra la mezzanotte e le 5 del mattino. Il lavoro a turni e il turno notturno sono sempre più diffusi a …
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Relationships between body mass index, appetite regulation and physical activity during shift-work and night-work
Approximately 3.6 million individuals in the UK are involved in a type of shift-work which impinges on the normal nocturnal sleeping period. This prevalence has significance considering that shift-work is a risk factor for many health problems including cardiovascular disease, breast cancer, …