| Records |
| Author |
Palmer M; Gibbons R; Bhagavathula R; Holshouser D; Davidson D |
| Title |
Roadway lighting's impact on altering soybean growth: Volume 1 |
Type |
Journal Article |
| Year |
2017 |
Publication |
Illinois Center for Transportation |
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| Volume |
Research Report No. FHWA - ICT - 17 - 010 |
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Pages |
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| Keywords |
plants; Lighting |
Abstract  |
The impact of roadway lighting on soybean plant growth and development was measured in situ at seven locations in the state of Illinois. The plant data collection included periodic height, reproductive stage, and Normalized Difference Vegetation Index (NDVI), as well as plant moisture content and dried seed weight after harvest. The periodic measurements were made at the same locations over time to determine delays in plant development. The impact of roadway lighting trespass was significant and measurable above thresholds of both horizontal and vertical illuminance as well as a combination of the two. A specification was drafted to minimize the impact of roadway lighting trespass on the soybean, and countermeasures were recommended to control the impact of lighting on the soybean. |
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GFZ @ kyba @ |
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1943 |
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| Author |
Palmer, M.; Gibbons, R.; Bhagavathula, R.; Holshouser, D. |
| Title |
Roadway Lighting’s Impact on Altering Soybean Growth – Volume 2: LED versus HPS Color Spectral Impact |
Type |
Journal Article |
| Year |
2018 |
Publication |
Technical Report |
Abbreviated Journal |
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| Volume |
FHWA-ICT-18-009 |
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Pages |
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| Keywords |
Plants |
| Abstract |
The impact of roadway lighting on soybean plant growth and development, was measured in situ at three locations in the state of Illinois. These locations were situated in close proximity of each other for the purpose of evaluating whether there was a difference in the soy response to HPS roadway lighting, versus soy lit by a specific model of 4,000K LED roadway lighting. The plant data collection included the reproductive-stage, the plant moisture content, and the dried seed weight after harvest. The impact of the type of roadway lighting on the reproduction stage and normalized yield was within the modeling confidence limits at a level of 90%. Modifications are recommended to the specification for roadway lighting trespass. This will minimize the impact on soybean plants based on the two roadway luminaire designs included in this study. |
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Illinois Center for Transportation/Illinois Department of Transportation |
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0197-9191 |
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GFZ @ kyba @ |
Serial |
2264 |
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| Author |
Solano-Lamphar, H.A.; Kocifaj, M. |
| Title |
Numerical research on the effects the skyglow could have in phytochromes and RQE photoreceptors of plants |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of Environmental Management |
Abbreviated Journal |
J Environ Manage |
| Volume |
209 |
Issue |
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Pages |
484-494 |
| Keywords |
Plants; Skyglow |
| Abstract |
The increase of artificial light at night has a terrible impact on organisms with nightlife patterns such as a migration, nutrition, reproduction and collective interaction. Plants are not free from this issue as they have life cycle events occurring not only yearly but also daily. Such events relate to daytime variations with seasons in which the flowers of deciduous trees bloom and the leaves of certain trees fall off and change color. A response of plants to artificial light at night still remains poorly quantified; but recent scientific research suggest that skyglow can disturb plants processes. For instance, low levels of light affect deciduous plants, which shed their leaves as days grow short in the fall. In this paper we model skyglow considering the features of artificial light that can affect natural processes of plants during the night. A case-study was conducted to mimic skyglow effects in real location for which experimental data exist. In our numerical simulations we found that some lighting systems can have an effect on plant photoreceptors and affect the phenology of plants. Specifically, the lamps that emit the electromagnetic energy in a wide spectral range can have greater effect on the photosensitivity of the plants. We believe the results obtained here will motivate botanists to make a targeted experiment to verify or challenge our findings. If the night light can change plant behavior under some conditions, it can have significant implications in botany, biology, or even agriculture. |
| Address |
ICA, Slovak Academy of Sciences, Dubravska Road 9, 845 03, Bratislava, Slovak Republic; Faculty of Mathematics, Physics, and Informatics, Comenius University, Mlynska Dolina, 842 48, Bratislava, Slovakia. Electronic address: kocifaj@savba.sk |
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English |
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0301-4797 |
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PMID:29316469 |
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no |
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GFZ @ kyba @ |
Serial |
1854 |
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Grubisic, M.; van Grunsven, R.H.A.; Manfrin, A.; Monaghan, M.T.; Hölker, F. |
| Title |
A transition to white LED increases ecological impacts of nocturnal illumination on aquatic primary producers in a lowland agricultural drainage ditch |
Type |
Journal Article |
| Year |
2018 |
Publication |
Environmental Pollution |
Abbreviated Journal |
Environmental Pollution |
| Volume |
240 |
Issue |
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Pages |
630-638 |
| Keywords |
Plants; Ecology |
| Abstract |
The increasing use of artificial light at night (ALAN) has led to exposure of freshwater ecosystems to light pollution worldwide. Simultaneously, the spectral composition of nocturnal illumination is changing, following the current shift in outdoor lighting technologies from traditional light sources to light emitting diodes (LED). LEDs emit broad-spectrum white light, with a significant amount of photosynthetically active radiation, and typically a high content of blue light that regulates circadian rhythms in many organisms. While effects of the shift to LED have been investigated in nocturnal animals, its impact on primary producers is unknown. We performed three field experiments in a lowland agricultural drainage ditch to assess the impacts of a transition from high-pressure sodium (HPS) to white LED illumination (color temperature 4000 K) on primary producers in periphyton. In all experiments, we compared biomass and pigment composition of periphyton grown under a natural light regime to that of periphyton exposed to nocturnal HPS or, consecutively, LED light of intensities commonly found in urban waters (approximately 20 lux). Periphyton was collected in time series (1–13 weeks). We found no effect of HPS light on periphyton biomass; however, following a shift to LED the biomass decreased up to 62%. Neither light source had a substantial effect on pigment composition. The contrasting effects of the two light sources on biomass may be explained by differences in their spectral composition, and in particular the blue content. Our results suggest that spectral composition of the light source plays a role in determining the impacts of ALAN on periphyton and that the ongoing transition to LED may increase the ecological impacts of artificial lighting on aquatic primary producers. Reduced biomass in the base of the food web can impact ecosystem functions such as productivity and food supply for higher trophic levels in nocturnally-lit ecosystems. |
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0269-7491 |
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GFZ @ kyba @ |
Serial |
1900 |
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| Author |
Borges, R.M. |
| Title |
Dark Matters: Challenges of Nocturnal Communication Between Plants and Animals in Delivery of Pollination Services |
Type |
Journal Article |
| Year |
2018 |
Publication |
Yale Journal of Biology and Medicine |
Abbreviated Journal |
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| Volume |
91 |
Issue |
1 |
Pages |
33-42 |
| Keywords |
Plants; Animals |
| Abstract |
The night is a special niche characterized by dim light, lower temperatures, and higher humidity compared to the day. Several animals have made the transition from the day into the night and have acquired unique adaptations to cope with the challenges of performing nocturnal activities. Several plant species have opted to bloom at night, possibly as a response to aridity to prevent excessive water loss through evapotranspiration since flowering is often a water-demanding process, or to protect pollen from heat stress. Nocturnal pollinators have visual adaptations to function under dim light conditions but may also trade off vision against olfaction when they are dependent on nectar-rewarding and scented flowers. Nocturnal pollinators may use CO2 and humidity cues emanating from freshly-opened flowers as indicators of nectar-rich resources. Some endothermic nocturnal insect pollinators are attracted to thermogenic flowers within which they remain to obtain heat as a reward to increase their energy budget. This review focuses on mechanisms that pollinators use to find flowers at night, and the signals that nocturnally blooming flowers may employ to attract pollinators under dim light conditions. It also indicates gaps in our knowledge. While millions of years of evolutionary time have given pollinators and plants solutions to the delivery of pollination services and to the offering of appropriate rewards, this history of successful evolution is being threatened by artificial light at night. Excessive and inappropriate illumination associated with anthropogenic activities has resulted in significant light pollution which serves to undermine life processes governed by dim light. |
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GFZ @ kyba @ |
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1832 |
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