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Author |
Min, J.-young; Min, K.-bok |
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Title |
Outdoor light at night and the prevalence of depressive symptoms and suicidal behaviors: a cross-sectional study in a nationally representative sample of Korean adults |
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Journal Article |
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Year |
2018 |
Publication |
Journal of Affective Disorders |
Abbreviated Journal |
Journal of Affective Disorders |
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Volume |
227 |
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199-205 |
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Keywords |
Human Health |
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Abstract |
Background
Outdoor light at night (LAN) is an increasingly prevalent type of environmental pollution. Studies have demonstrated that outdoor LAN can disrupt circadian rhythms, potentially contributing to insomnia, cancer, cardiovascular disease, and metabolic changes in humans. We investigated the association of outdoor LAN with depressive symptoms and suicidal behaviors in South Korean adults.
Methods
This study used data from the 2009 Korean Community Health Survey, a representative sample dataset. Study population consisted of 113,119 participants for the assessment of depressive symptoms and 152,159 participants for the assessment of suicidal behavior. Depressive symptoms were measured using the Korean version of the Center for Epidemiologic Studies Depression Scale (depressive symptoms, score of > 16). Suicidal behaviors were defined as the experience of suicidal ideation or attempt. Outdoor LAN was estimated by satellite data from the National Centers for Environmental Information.
Results
Participants with depressive symptoms or history of suicidal behaviors were more likely to have exposure to outdoor LAN than those without depressive symptoms or suicidal behaviors. Compared with adults living in areas exposed to the lowest outdoor LAN, those living in areas exposed to the highest levels had higher likelihood depressive symptoms (OR = 1.29; 95% CI: 1.15–1.46) or suicidal behaviors (OR = 1.27; 95% CI: 1.16–1.39). Significant dose-response relationships were observed between outdoor LAN and the odds of depressive symptoms and suicidal behaviors.
Conclusion
Outdoor LAN was found to be significantly associated with depressive symptoms and suicidal behaviors, suggesting that it may be an environmental contributor to mental health problems. |
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0165-0327 |
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LoNNe @ kyba @ |
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1777 |
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Author |
Kozaki, Tomoaki; Taketomi, Ryunosuke; Hidaka ,Yuki; Ida, Nagisa; Yasuda, Takeo |
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Title |
Preventive Effect of Morning Bluish LED Light on Light-induced Melatonin Suppression at Night |
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Journal Article |
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Year |
2018 |
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Journal of Science and Technology in Lighting |
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41 |
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206-210 |
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Human Health |
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Abstract |
Bright nocturnal light has been known to suppress melatonin secretion. However, bright light exposure during daytime might reduce light-induced melatonin suppression (LIMS) at night. This study aims to evaluate the effect of high correlated color temperature LED light during daytime on LIMS. Male participants were exposed to different light conditions for 3 h in the morning (09:00â??12:00). The light conditions were dim light (<10 lx), 125 lx high correlated color temperature (CCT) LED light, and 250 lx high CCT LED light. The subjects were then exposed to bright light (white light, 300 lx) for 1.5 h at night (01:00â??02:30). Saliva samples were taken before (01:00) and after (02:30) exposure for evaluation of melatonin secretion. There were no significant differences in melatonin secretion before and after night-time light exposure on the 125 lx and 250 lx morning light conditions. Since these light intensities were almost equal to those in our previous study, the high CCT LED light might be appropriate for certain work places (e.g., hospitals and underground spaces), contributing to the reduction of our health risk and also saving energy. |
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1785 |
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Grubisic, M.; Singer, G.; Bruno, M.C.; van Grunsven, R.H.A.; Manfrin, A.; Monaghan, M.T.; Hölker, F. |
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A pigment composition analysis reveals community changes in pre-established stream periphyton under low-level artificial light at night |
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Journal Article |
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2018 |
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Limnologica |
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69 |
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55-58 |
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Plants; Ecology |
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Freshwaters are increasingly exposed to artificial light at night (ALAN), yet the consequences for aquatic primary producers remain largely unknown. We used stream-side flumes to expose three-week-old periphyton to LED light. Pigment composition was used to infer community changes in LED-lit and control periphyton before and after three weeks of treatment. The proportion of diatoms/chrysophytes decreased (14%) and cyanobacteria increased (17%) in lit periphyton in spring. This may reduce periphyton nutritional quality in artificially-lit waters. |
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0075-9511 |
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LoNNe @ schroer @ |
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1791 |
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Dimitriadis, C.; Fournari - Konstantinidou, I.; Sourbès, L.; Koutsoubas, D.; Mazaris, A.D. |
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Title |
Reduction of sea turtle population recruitment caused by nightlight: Evidence from the Mediterranean region |
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Journal Article |
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2018 |
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Ocean & Coastal Management |
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Ocean & Coastal Management |
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153 |
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108-115 |
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Animals |
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The spread of artificial night lighting is increasingly acknowledged as a major threat to global biodiversity. Identifying and exploring the impacts of nightlight pollution upon species behavior, ecology and population dynamics could enhance conservation capacity. Sea turtle hatchlings emerge from nest at night and use visual cues to direct towards the brightest and lowest horizon, eventually leading them to the sea. Nightlight pollution could alter the cues perceived, disorienting the fragile hatchlings. We examined the level of artificial lighting and orientation patterns of sea turtles hatchling, in Zakynthos Island, Greece, one of the main nesting rookeries of the loggerheads (Caretta caretta) in the Mediterranean Sea. We analyzed movement patterns of 5967 hatchlings from 230 nests, and demonstrate that nightlight pollution could reduce population recruitment by more than 7%, suggesting that mitigation measures should become a high conservation priority. Our results further suggest that the responses of sea turtle hatchlings to artificial nighttime lighting could vary significantly depending on various factors, either anthropogenic or natural. Local conditions operating at the nesting site level determine the fine scale responses of hatchlings, thus conservation measures should be drawn in respect to site-specific properties. |
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0964-5691 |
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LoNNe @ kyba @ |
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1792 |
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Robertson, B.A.; Keddy-Hector, I.A.; Shrestha, S.D.; Silverberg, L.Y.; Woolner, C.E.; Hetterich, I.; Horváth, G. |
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Title |
Susceptibility to ecological traps is similar among closely related taxa but sensitive to spatial isolation |
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Journal Article |
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Year |
2018 |
Publication |
Animal Behaviour |
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135 |
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77-84 |
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Keywords |
aquatic insect; behaviour; evolutionary trap; light pollution; maladaptation; polarized light pollution |
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0003-3472 |
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LoNNe @ schroer @ |
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1793 |
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