Diurnal cycles provide a tractable system to study the response of metabolism and growth to fluctuating temperatures. We reasoned that the response to daytime and night temperature may vary; while daytime temperature affects photosynthesis, night temperature affects use of carbon that was accumulated in the light. Three Arabidopsis thaliana accessions were grown in thermocycles under carbon-lim...

THE purpose of this work is the investigation of: (a) The reliability of the Koch's dark adaptometer. (b) The normal findings for minimum form and light senses on the instrument.. (c) The minimum form and light senses in subjects complaining of defective night vision, and (d) Conclusions,that might be drawn from these findings in helping to distinguish between psychogenic and organic night visu...

Citation: Manfrin A, Singer G, Larsen S, Weiß N, van Grunsven RHA, Weiß N-S, Wohlfahrt S, Monaghan MT and Hölker F (2017) Artificial Light at Night Affects Organism Flux across Ecosystem Boundaries and Drives Community Structure in the Recipient Ecosystem. Front. Environ. Sci. 5:61. doi: 10.3389/fenvs.2017.00061 Artificial Light at Night Affects Organism Flux across Ecosystem Boundaries and Dri...

1481 ALERTNESS AND PERFORMANCE DURING NIGHT WORK CAN BE SERIOUSLY IMPAIRED.1,2 THIS OCCURS BECAUSE THE MASTER CIRCADIAN CLOCK OF MOST night workers, which controls the body�s circadian rhythms (e.g., alertness, temperature, melatonin), does not shift to realign with a night work, day sleep schedule.3 A sharp increase in sleepiness and decrease in performance occurs around the minimum of the cir...

Two studies recently published in the Journal showed that disruption of diurnal sleep–wakefulness rhythms, especially through nighttime shift work, was associated with higher subsequent breast cancer incidence (1,2). Both of the articles and the accompanying editorial cited melatonin suppression as a likely mediator via reduced suppression of ovarian estrogen production due to light exposure du...

The defense meteorological satellite program (DMSP) operational linescan system (OLS) sensors have imaged emitted light from Earth’s surface since the 1970s. Temporal overlap in the missions of 5 OLS sensors allows for intercalibration of the annual composites over the past 19 years (Elvidge et al., 2009). The resulting image time series captures a spatiotemporal signature of the growth and evo...

Currently, in developed countries, nights are excessively illuminated (light at night), whereas daytime is mainly spent indoors, and thus people are exposed to much lower light intensities than under natural conditions. In spite of the positive impact of artificial light, we pay a price for the easy access to light during the night: disorganization of our circadian system or chronodisruption (C...

In 2007, the International Agency for Research on Cancer classified shift work involving circadian disruption as probably carcinogenic to humans (group 2A), primarily based on experimental and epidemiologic evidence for breast cancer. In order to examine options for evidence-based preventive actions, 16 researchers in basic, epidemiological and applied sciences convened ...

Bright light can phase shift human circadian rhythms, and recent studies have suggested that exercise can also produce phase shifts in humans. However, few studies have examined the phase-shifting effects of intermittent bright light, exercise, or the combination. This simulated night work field study included eight consecutive night shifts followed by daytime sleep/dark periods (delayed 9 h fr...

The light regime is an ecologically important factor in pelagic habitats, influencing a range of biological processes. However, the availability and importance of light to these processes in high Arctic zooplankton communities during periods of 'complete' darkness (polar night) are poorly studied. Here we characterized the ambient light regime throughout the diel cycle during the high Arctic po...