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Author Kyba, C.C.M.; Ruhtz, T.; Fischer, J.; Hölker, F.
Title Lunar skylight polarization signal polluted by urban lighting Type (up) Journal Article
Year 2011 Publication Journal of Geophysical Research: Atmospheres Abbreviated Journal J. Geophys. Res.
Volume 116 Issue D24 Pages
Keywords aeroecology; ecological light pollution; light pollution; moonlight; nocturnal navigation; polarized light
Abstract On clear moonlit nights, a band of highly polarized light stretches across the sky at a 90 degree angle from the moon, and it was recently demonstrated that nocturnal organisms are able to navigate based on it. Urban skyglow is believed to be almost unpolarized, and is therefore expected to dilute this unique partially linearly polarized signal. We found that urban skyglow has a greater than expected degree of linear polarization (p = 8.6 ± 0.3%), and confirmed that its presence diminishes the natural lunar polarization signal. We also observed that the degree of linear polarization can be reduced as the moon rises, due to the misalignment between the polarization angles of the skyglow and scattered moonlight. Under near ideal observing conditions, we found that the lunar polarization signal was clearly visible (p = 29.2 ± 0.8%) at a site with minimal light pollution 28 km from Berlin's center, but was reduced (p = 11.3 ± 0.3%) within the city itself. Daytime measurements indicate that without skyglow pwould likely be in excess of 50%. These results indicate that nocturnal animal navigation systems based on perceiving polarized scattered moonlight likely fail to operate properly in highly light-polluted areas, and that future light pollution models must take polarization into account.
Address
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0148-0227 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 21
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Author Kyba, C.C.M.; Ruhtz, T.; Fischer, J.; Hölker, F.
Title Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems Type (up) Journal Article
Year 2011 Publication PloS one Abbreviated Journal PLoS One
Volume 6 Issue 3 Pages e17307
Keywords Berlin; *Cities; *Ecosystem; Environmental Pollution/*adverse effects/analysis; *Light; Seasons; *Weather
Abstract The diurnal cycle of light and dark is one of the strongest environmental factors for life on Earth. Many species in both terrestrial and aquatic ecosystems use the level of ambient light to regulate their metabolism, growth, and behavior. The sky glow caused by artificial lighting from urban areas disrupts this natural cycle, and has been shown to impact the behavior of organisms, even many kilometers away from the light sources. It could be hypothesized that factors that increase the luminance of the sky amplify the degree of this “ecological light pollution”. We show that cloud coverage dramatically amplifies the sky luminance, by a factor of 10.1 for one location inside of Berlin and by a factor of 2.8 at 32 km from the city center. We also show that inside of the city overcast nights are brighter than clear rural moonlit nights, by a factor of 4.1. These results have important implications for choronobiological and chronoecological studies in urban areas, where this amplification effect has previously not been considered.
Address Institute for Space Sciences, Freie Universitat Berlin, Berlin, Germany. christopher.kyba@wew.fu-berlin.de
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Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1932-6203 ISBN Medium
Area Expedition Conference
Notes PMID:21399694; PMCID:PMC3047560 Approved no
Call Number IDA @ john @ Serial 20
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Author Kunz, T.H.; Gauthreaux, S.A.J.; Hristov, N.I.; Horn, J.W.; Jones, G.; Kalko, E.K.V.; Larkin, R.P.; McCracken, G.F.; Swartz, S.M.; Srygley, R.B.; Dudley, R.; Westbrook, J.K.; Wikelski, M.
Title Aeroecology: probing and modeling the aerosphere Type (up) Journal Article
Year 2008 Publication Integrative and Comparative Biology Abbreviated Journal Integr Comp Biol
Volume 48 Issue 1 Pages 1-11
Keywords aeroecology; light; biology
Abstract Aeroecology is a discipline that embraces and integrates the domains of atmospheric science, ecology, earth science, geography, computer science, computational biology, and engineering. The unifying concept that underlies this emerging discipline is its focus on the planetary boundary layer, or aerosphere, and the myriad of organisms that, in large part, depend upon this environment for their existence. The aerosphere influences both daily and seasonal movements of organisms, and its effects have both short- and long-term consequences for species that use this environment. The biotic interactions and physical conditions in the aerosphere represent important selection pressures that influence traits such as size and shape of organisms, which in turn facilitate both passive and active displacements. The aerosphere also influences the evolution of behavioral, sensory, metabolic, and respiratory functions of organisms in a myriad of ways. In contrast to organisms that depend strictly on terrestrial or aquatic existence, those that routinely use the aerosphere are almost immediately influenced by changing atmospheric conditions (e.g., winds, air density, precipitation, air temperature), sunlight, polarized light, moon light, and geomagnetic and gravitational forces. The aerosphere has direct and indirect effects on organisms, which often are more strongly influenced than those that spend significant amounts of time on land or in water. Future advances in aeroecology will be made when research conducted by biologists is more fully integrated across temporal and spatial scales in concert with advances made by atmospheric scientists and mathematical modelers. Ultimately, understanding how organisms such as arthropods, birds, and bats aloft are influenced by a dynamic aerosphere will be of importance for assessing, and maintaining ecosystem health, human health, and biodiversity.
Address *Center for Ecology and Conservation Biology, Department of Biology, Boston University, Boston, MA 02215, USA; Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA; School of Biological Sciences, University of Bristol, Woodland Road, Bristol BS8 1UG, UK; Department of Experimental Ecology, University of Ulm, Albert-Einstein-Allee 11, 89069, Ulm, Germany; Illinois Natural History Survey, 607 East Peabody Drive, Champaign, IL 61820, USA; Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996-1610, USA; Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA; **USDA-ARS, 1500 N. Central Avenue, Sidney, MT 59270, USA; Department of Integrative Biology, University of California, Berkeley, CA 94720, USA; USDA-ARS, 2771 F&B Road, College Station, TX 77845, USA and Department of Ecology and Evolutionary Biology, Princeton University, Princeton NJ 08544, USA
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Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1540-7063 ISBN Medium
Area Expedition Conference
Notes PMID:21669768 Approved no
Call Number IDA @ john @ Serial 19
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Author Gaston, K.J.; Bennie, J.; Davies, T.W.; Hopkins, J.
Title The ecological impacts of nighttime light pollution: a mechanistic appraisal Type (up) Journal Article
Year 2013 Publication Biological Reviews of the Cambridge Philosophical Society Abbreviated Journal Biol Rev Camb Philos Soc
Volume 88 Issue 4 Pages 912-927
Keywords dark; information; light; moonlight; night; pollution; resources; rhythms; time
Abstract The ecological impacts of nighttime light pollution have been a longstanding source of concern, accentuated by realized and projected growth in electrical lighting. As human communities and lighting technologies develop, artificial light increasingly modifies natural light regimes by encroaching on dark refuges in space, in time, and across wavelengths. A wide variety of ecological implications of artificial light have been identified. However, the primary research to date is largely focused on the disruptive influence of nighttime light on higher vertebrates, and while comprehensive reviews have been compiled along taxonomic lines and within specific research domains, the subject is in need of synthesis within a common mechanistic framework. Here we propose such a framework that focuses on the cross-factoring of the ways in which artificial lighting alters natural light regimes (spatially, temporally, and spectrally), and the ways in which light influences biological systems, particularly the distinction between light as a resource and light as an information source. We review the evidence for each of the combinations of this cross-factoring. As artificial lighting alters natural patterns of light in space, time and across wavelengths, natural patterns of resource use and information flows may be disrupted, with downstream effects to the structure and function of ecosystems. This review highlights: (i) the potential influence of nighttime lighting at all levels of biological organisation (from cell to ecosystem); (ii) the significant impact that even low levels of nighttime light pollution can have; and (iii) the existence of major research gaps, particularly in terms of the impacts of light at population and ecosystem levels, identification of intensity thresholds, and the spatial extent of impacts in the vicinity of artificial lights.
Address Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, TR10 9EZ, U.K
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0006-3231 ISBN Medium
Area Expedition Conference
Notes PMID:23565807 Approved no
Call Number IDA @ john @ Serial 14
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Author Gaston, K.J.; Davies, T.W.; Bennie, J.; Hopkins, J.
Title Reducing the ecological consequences of night-time light pollution: options and developments Type (up) Journal Article
Year 2012 Publication The Journal of Applied Ecology Abbreviated Journal J Appl Ecol
Volume 49 Issue 6 Pages 1256-1266
Keywords
Abstract 1. Much concern has been expressed about the ecological consequences of night-time light pollution. This concern is most often focused on the encroachment of artificial light into previously unlit areas of the night-time environment, but changes in the spectral composition, duration and spatial pattern of light are also recognized as having ecological effects.2. Here, we examine the potential consequences for organisms of five management options to reduce night-time light pollution. These are to (i) prevent areas from being artificially lit; (ii) limit the duration of lighting; (iii) reduce the 'trespass' of lighting into areas that are not intended to be lit (including the night sky); (iv) change the intensity of lighting; and (v) change the spectral composition of lighting.3. Maintaining and increasing natural unlit areas is likely to be the most effective option for reducing the ecological effects of lighting. However, this will often conflict with other social and economic objectives. Decreasing the duration of lighting will reduce energy costs and carbon emissions, but is unlikely to alleviate many impacts on nocturnal and crepuscular animals, as peak times of demand for lighting frequently coincide with those in the activities of these species. Reducing the trespass of lighting will maintain heterogeneity even in otherwise well-lit areas, providing dark refuges that mobile animals can exploit. Decreasing the intensity of lighting will reduce energy consumption and limit both skyglow and the area impacted by high-intensity direct light. Shifts towards 'whiter' light are likely to increase the potential range of environmental impacts as light is emitted across a broader range of wavelengths.4.Synthesis and applications. The artificial lightscape will change considerably over coming decades with the drive for more cost-effective low-carbon street lighting solutions and growth in the artificially lit area. Developing lighting strategies that minimize adverse ecological impacts while balancing the often conflicting requirements of light for human utility, comfort and safety, aesthetic concerns, energy consumption and carbon emission reduction constitute significant future challenges. However, as both lighting technology and understanding of its ecological effects develop, there is potential to identify adaptive solutions that resolve these conflicts.
Address Environment and Sustainability Institute, University of Exeter Penryn, Cornwall, TR10 9EZ, UK
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0021-8901 ISBN Medium
Area Expedition Conference
Notes PMID:23335816; PMCID:PMC3546378 Approved no
Call Number IDA @ john @ Serial 15
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