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Maggi, E.; Benedetti-Cecchi, L. |
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Title |
Trophic compensation stabilizes marine primary producers exposed to artificial light at night |
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Journal Article |
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Year |
2018 |
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Marine Ecology Progress Series |
Abbreviated Journal |
Mar. Ecol. Prog. Ser. |
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606 |
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1-5 |
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Keywords |
Plants; Animals; Ecology |
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Abstract |
Artificial light at night (ALAN) is a widespread phenomenon along coastal areas. Despite increasing evidence of pervasive effects of ALAN on patterns of species distribution and abundance, the potential of this emerging threat to alter ecological processes in marine ecosystems has remained largely unexplored. Here, we show how exposure to white LED lighting, comparable to that experienced along local urbanized coasts, significantly enhanced the impact of grazing gastropods on epilithic microphytobenthos (MPB). ALAN increased both the photosynthetic biomass of MPB and the grazing pressure of gastropods, such that consumers compensated for the positive effect of night lighting on primary producers. Our results indicate that trophic interactions can provide a stabilizing compensatory mechanism against ALAN effects in natural food webs. |
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0171-8630 |
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GFZ @ kyba @ |
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2063 |
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Buschmann, C.; Lichtenthaler, H.K. |
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Title |
Principles and characteristics of multi-colour fluorescence imaging of plants |
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Journal Article |
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Year |
1998 |
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Journal of Plant Physiology |
Abbreviated Journal |
Journal of Plant Physiology |
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152 |
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2-3 |
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297-314 |
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Plants |
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0176-1617 |
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LoNNe @ kagoburian @ |
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652 |
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Lang, M.; Lichtenthaler, H.K.; Sowinska, M.; Heisel, F.; Miehé, J.A. |
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Title |
Fluorescence Imaging of Water and Temperature Stress in Plant Leaves |
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Journal Article |
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1996 |
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Journal of Plant Physiology |
Abbreviated Journal |
Journal of Plant Physiology |
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148 |
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5 |
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613-621 |
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Plants |
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0176-1617 |
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LoNNe @ kagoburian @ |
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656 |
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Palmer, M.; Gibbons, R.; Bhagavathula, R.; Holshouser, D. |
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Title |
Roadway Lighting’s Impact on Altering Soybean Growth – Volume 2: LED versus HPS Color Spectral Impact |
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Journal Article |
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2018 |
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Technical Report |
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FHWA-ICT-18-009 |
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Plants |
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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 @ |
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2264 |
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Author |
Grubisic, M.; van Grunsven, R.H.A.; Manfrin, A.; Monaghan, M.T.; Hölker, F. |
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Title |
A transition to white LED increases ecological impacts of nocturnal illumination on aquatic primary producers in a lowland agricultural drainage ditch |
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Journal Article |
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2018 |
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Environmental Pollution |
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Environmental Pollution |
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240 |
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630-638 |
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Plants; Ecology |
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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 @ |
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1900 |
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