Book contents
- Biological Implications of Circadian Disruption
- Biological Implications of Circadian Disruption
- Copyright page
- Contents
- Contributors
- Preface
- 1 Introduction to Circadian Rhythms
- 2 Central Clock Dynamics
- 3 Melatonin, Light, and the Circadian System
- 4 Disrupted Circadian Rhythms, Stress, and Allostatic Load
- 5 Disrupted Circadian Rhythms and Mental Health
- 6 Circadian Rhythms and Cognitive Functioning
- 7 Circadian Rhythm Disruption in Aging and Alzheimer’s Disease
- 8 Circadian Rhythms Regulate Neuroinflammation after Traumatic Brain Injury and Spinal Cord Injury
- 9 Disrupted Circadian Rhythms and Neuroendocrine Function in Fertility
- 10 Disrupted Circadian Rhythms and Metabolic Function
- 11 Disrupted Circadian Rhythms, Time Restricted Feeding, and Blood Pressure Regulation
- 12 Disrupted Circadian Rhythms and Immune Function
- 13 Circadian Rhythms and Cardiac Function
- 14 Disrupted Circadian Rhythms and Cancer
- 15 Light Effects across Species in Nature
- 16 Measurement and Analysis of Exposure to Light at Night in Epidemiology
- Index
- References
15 - Light Effects across Species in Nature
A Focus on Solutions
Published online by Cambridge University Press: 07 October 2023
- Biological Implications of Circadian Disruption
- Biological Implications of Circadian Disruption
- Copyright page
- Contents
- Contributors
- Preface
- 1 Introduction to Circadian Rhythms
- 2 Central Clock Dynamics
- 3 Melatonin, Light, and the Circadian System
- 4 Disrupted Circadian Rhythms, Stress, and Allostatic Load
- 5 Disrupted Circadian Rhythms and Mental Health
- 6 Circadian Rhythms and Cognitive Functioning
- 7 Circadian Rhythm Disruption in Aging and Alzheimer’s Disease
- 8 Circadian Rhythms Regulate Neuroinflammation after Traumatic Brain Injury and Spinal Cord Injury
- 9 Disrupted Circadian Rhythms and Neuroendocrine Function in Fertility
- 10 Disrupted Circadian Rhythms and Metabolic Function
- 11 Disrupted Circadian Rhythms, Time Restricted Feeding, and Blood Pressure Regulation
- 12 Disrupted Circadian Rhythms and Immune Function
- 13 Circadian Rhythms and Cardiac Function
- 14 Disrupted Circadian Rhythms and Cancer
- 15 Light Effects across Species in Nature
- 16 Measurement and Analysis of Exposure to Light at Night in Epidemiology
- Index
- References
Summary
Artificial light at night (ALAN) puts major pressure on the natural environment. There are five main ways of mitigating its biological impacts: avoidance of using ALAN, minimizing ALAN use, restoring or rehabilitating areas from ALAN, and offsetting the use of ALAN. Their potential effectiveness can be better understood through careful consideration of how organisms respond to light. Here we focus particularly on responses to altering recurring natural periods of light and darkness that affect the internal clock of organisms. All clocks are light sensitive and, depending on the photoreceptors of the organism, they show maximal responsiveness to different wavelengths, from UV to near infrared. Moreover, they show a high light-sensitivity, with a threshold at about intensities occurring during full moon or even less. This suggests that minimizing the use of ALAN through dimming of emissions and reducing the daily periods for which those lamps are in use may provide valuable benefits. However, if the biological effects of ALAN are to be widely reduced additional measures will need to be taken, including strengthening protection of the remaining dark spaces, reducing numbers of existing lights and restoring darkness in previously lit areas, and extensive shielding of those lights that are retained.
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- Information
- Biological Implications of Circadian DisruptionA Modern Health Challenge, pp. 338 - 355Publisher: Cambridge University PressPrint publication year: 2023