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van Koppenhagen N, Haller J, Kappeler J, Gossner MM, Bolliger J. LED streetlight characteristics alter the functional composition of ground-dwelling invertebrates. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 355:124209. [PMID: 38795821 DOI: 10.1016/j.envpol.2024.124209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/15/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024]
Abstract
Artificial Light at Night (ALAN) has been identified as a primary driver of environmental change in the 21st century with key impacts on ecosystems. At the same time, developments of LED lighting systems with adjustable parameters-such as color temperature and light intensity-may provide an opportunity to mitigate the negative effects of ALAN. To test the potential effects of LED properties, we conducted a comprehensive field study over two summers at three forest sites in Switzerland. We investigated the impact of three key attributes of LED lights (color temperature, brightness, and luminaire shape) on the abundance and community structure of ground-dwelling invertebrate functional groups (predators, omnivores, and detritivores). We found a significantly increased nocturnal attraction of omnivores (+275%) and predators (+70%), but not detritivores, to ALAN, altering arthropod community composition and trophic interactions in forests. LED color temperature and luminaire shape showed minimal effects on all three functional groups, while reducing light level from 100% to 50% attracted fewer individuals in all groups with a significant effect in omnivores (-57%). In addition, we observed significant interactions of color temperatures and luminaire shapes with light intensity, with a decrease in numbers when dimming the light to 50% intensity combined with a color temperature of 3700 K for predators (-53%), with diffusing luminaire shapes for omnivores (-77%) and with standard luminaire shape for detritivores (-27%). The predator-detritivore ratio showed a significant color temperature - light level interaction, with increased numbers of predators around streetlights with 3700 K and 100% intensity, resulting in an elevated top-down pressure on detritivores. These results suggest the importance of considering combined light characteristics in future outdoor lighting designs.
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Affiliation(s)
- Nicola van Koppenhagen
- Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland.
| | - Jörg Haller
- EKZ, Dreikönigstrasse 18, CH-8022, Zürich, Switzerland
| | - Julia Kappeler
- Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland
| | - Martin M Gossner
- Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland; ETH Zurich, Department of Environmental Systems Science, Institute of Terrestrial Ecosystems, CH-8092, Zurich, Switzerland
| | - Janine Bolliger
- Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland
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Beaugeard E, Brischoux F, Angelier F. Light pollution affects activity differentially across breeding stages in an urban exploiter: An experiment in the house sparrow (Passer domesticus). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 351:124055. [PMID: 38692388 DOI: 10.1016/j.envpol.2024.124055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/05/2024] [Accepted: 04/24/2024] [Indexed: 05/03/2024]
Abstract
Artificial Light At Night (ALAN) is a major urban perturbation, which can have detrimental effects on wildlife. Recent urban planning has led to an increased use of white light emission diodes (LEDs) in cities. However, little is known about the effects of this type of ALAN on wild vertebrates, especially during reproduction. We designed an experiment to test the impact of ALAN on the activity rhythms (daily time of first activity (TFA) and time of last activity (TLA)) of captive House sparrows (Passer domesticus) during several reproductive stages (from pre-breeding to post-breeding). We also tested the impact of ALAN on reproductive performance (laying date, clutch size, hatching and fledging success). Experimental birds were active earlier in the morning (earlier TFA) relative to controls although experimental and control birds did not differ in their TLA. The effect of ALAN on TFA was apparent during specific stages only (pre-breeding and chick-rearing stages), suggesting that sparrows actively adjust their activity in response to ALAN only during specific periods. This impact of ALAN on activity did not persist through the whole breeding season, suggesting that sparrows may habituate to ALAN. Alternatively, they may not be able to sustain a long-term increased activity in response to ALAN because of sleep deprivation and related physiological costs. Finally, we did not find any impact of ALAN on the reproductive performance of captive house sparrows held under optimal conditions. This suggests that ALAN may not be dramatically detrimental to the reproduction of this urban exploiter, at least when food availability is not constraining.
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Affiliation(s)
- Erika Beaugeard
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-LRU, 79360, Villiers en Bois, France
| | - François Brischoux
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-LRU, 79360, Villiers en Bois, France
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-LRU, 79360, Villiers en Bois, France.
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Liu Q, Zhang HD, Xing D, Xie JW, Du YT, Wang M, Yin ZG, Jia N, Li CX, Zhao T, Jiang YT, Dong YD, Guo XX, Zhou XY, Zhao TY. The effect of artificial light at night (ALAN) on the characteristics of diapause of Aedes albopictus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171594. [PMID: 38461989 DOI: 10.1016/j.scitotenv.2024.171594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 03/07/2024] [Accepted: 03/07/2024] [Indexed: 03/12/2024]
Abstract
BACKGROUND Recently, the effect of artificial light at night (ALAN) on the physiology and behavior of insects has gradually attracted the attention of researchers and has become a new research topic. Aedes albopictus is an important vector that poses a great public health risk. Further studies on the diapause of Ae. albopictus can provide a basis for new vector control, and it is also worth exploring whether the effect of ALAN on the diapause of Ae. albopictus will provide a reference for the prevention and control of infectious diseases mediated by Ae. albopictus. METHODS In this study, we experimentally studied the diapause characteristics of different geographical strains of Ae. albopictus under the interference of ALAN, explored the effect of ALAN on the diapause of Ae. albopictus and explored the molecular mechanism of ALAN on the diapause process through RNA-seq. RESULTS As seen from the diapause incidence, Ae. albopictus of the same geographic strain showed a lower diapause incidence when exposed to ALAN. The differentially expressed genes (DEGs) were mainly enriched in signaling and metabolism-related pathways in the parental females and diapause eggs of the ALAN group. CONCLUSIONS ALAN inhibits Ae. albopictus diapause. In the short photoperiod induced diapause of Ae. albopictus in temperate strain Beijing and subtropical strain Guangzhou, the disturbance of ALAN reduced the egg diapause rate and increased the egg hatching rate of Ae. albopictus, and the disturbance of ALAN also shortened the life cycle of Ae. albopictus eggs after hatching.
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Affiliation(s)
- Qing Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Heng-Duan Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Dan Xing
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Jing-Wen Xie
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yu-Tong Du
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Ming Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Zi-Ge Yin
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Nan Jia
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Chun-Xiao Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Teng Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yu-Ting Jiang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yan-De Dong
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Xiao-Xia Guo
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Xin-Yu Zhou
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Tong-Yan Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.
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Caley A, Marzinelli EM, Byrne M, Mayer-Pinto M. Artificial light at night and warming impact grazing rates and gonad index of the sea urchin Centrostephanus rodgersii. Proc Biol Sci 2024; 291:20240415. [PMID: 38628122 PMCID: PMC11021935 DOI: 10.1098/rspb.2024.0415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 03/15/2024] [Indexed: 04/19/2024] Open
Abstract
Artificial light at night (ALAN) is a growing threat to coastal habitats, and is likely to exacerbate the impacts of other stressors. Kelp forests are dominant habitats on temperate reefs but are declining due to ocean warming and overgrazing. We tested the independent and interactive effects of ALAN (dark versus ALAN) and warming (ambient versus warm) on grazing rates and gonad index of the sea urchin Centrostephanus rodgersii. Within these treatments, urchins were fed either 'fresh' kelp or 'treated' kelp. Treated kelp (Ecklonia radiata) was exposed to the same light and temperature combinations as urchins. We assessed photosynthetic yield, carbon and nitrogen content and C : N ratio of treated kelp to help identify potential drivers behind any effects on urchins. Grazing increased with warming and ALAN for urchins fed fresh kelp, and increased with warming for urchins fed treated kelp. Gonad index was higher in ALAN/ambient and dark/warm treatments compared to dark/ambient treatments for urchins fed fresh kelp. Kelp carbon content was higher in ALAN/ambient treatments than ALAN/warm treatments at one time point. This indicates ocean warming and ALAN may increase urchin grazing pressure on rocky reefs, an important finding for management strategies.
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Affiliation(s)
- Amelia Caley
- Centre for Marine Science and Innovation; Evolution and Ecology Research Centre; School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Ezequiel M. Marzinelli
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Maria Byrne
- School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Mariana Mayer-Pinto
- Centre for Marine Science and Innovation; Evolution and Ecology Research Centre; School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, New South Wales 2052, Australia
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5
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Ayalon I, Avisar D, Jechow A, Levy O. Corals nitrogen and carbon isotopic signatures alters under Artificial Light at Night (ALAN). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:170513. [PMID: 38360314 DOI: 10.1016/j.scitotenv.2024.170513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/25/2024] [Accepted: 01/26/2024] [Indexed: 02/17/2024]
Abstract
This study examines the impact of Artificial Light at Night (ALAN) on two coral species, Acropora eurystoma and Pocillopora damicornis, in the Gulf of Aqaba/Eilat Red Sea, assessing their natural isotopic responses to highlight changes in energy and nutrient sourcing due to sensory light pollution. Our findings indicate significant disturbances in photosynthetic processes in Acropora eurystoma, as evidenced by shifts in δ13C values under ALAN, pointing to alterations in carbon distribution or utilization. In Pocillopora damicornis, similar trends were observed, with changes in δ13C and δ15N values suggesting a disruption in its nitrogen cycle and feeding strategies. The study also uncovers species-specific variations in heterotrophic feeding, a crucial factor in coral resilience under environmental stress, contributing to the corals' fixed carbon budget. Light measurements across the Gulf demonstrated a gradient of light pollution which possess the potential of affecting marine biology in the region. ALAN was found to disrupt natural diurnal tentacle behaviors in both coral species, crucial for prey capture and nutrient acquisition, thereby impacting their isotopic composition and health. Echoing previous research, our study underscores the need to consider each species' ecological and physiological contexts when assessing the impacts of anthropogenic changes. The findings offer important insights into the complexities of marine ecosystems under environmental stress and highlight the urgency of developing effective mitigation strategies.
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Affiliation(s)
- Inbal Ayalon
- Porter School of the Environment and Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, 39040, Israel; Israel The H. Steinitz Marine Biology Laboratory, The Interuniversity Institute for Marine Sciences of Eilat, P.O. Box 469, Eilat 88103, Israel; Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 52900, Israel.
| | - Dror Avisar
- Porter School of the Environment and Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, 39040, Israel
| | - Andreas Jechow
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, Berlin 12587, Germany; Department of Engineering, Brandenburg University of Applied Sciences, 14770 Brandenburg an der Havel, Germany
| | - Oren Levy
- Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 52900, Israel.
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Candolin U. Coping with light pollution in urban environments: Patterns and challenges. iScience 2024; 27:109244. [PMID: 38433890 PMCID: PMC10904992 DOI: 10.1016/j.isci.2024.109244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024] Open
Abstract
Artificial light at night is a growing environmental problem that is especially pronounced in urban environments. Yet, impacts on urban wildlife have received scant attention and patterns and consequences are largely unknown. Here, I present a conceptual framework outlining the challenges species encounter when exposed to urban light pollution and how they may respond through plastic adjustments and genetic adaptation. Light pollution interferes with biological rhythms, influences behaviors, fragments habitats, and alters predation risk and resource abundance, which changes the diversity and spatiotemporal distribution of species and, hence, the structure and function of urban ecosystems. Furthermore, light pollution interacts with other urban disturbances, which can exacerbate negative effects on species. Given the rapid growth of urban areas and light pollution and the importance of healthy urban ecosystems for human wellbeing, more research is needed on the impacts of light pollution on species and the consequences for urban ecosystems.
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Affiliation(s)
- Ulrika Candolin
- Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki, Finland
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7
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Botté A, Payton L, Lefeuvre E, Tran D. Is part-night lighting a suitable mitigation strategy to limit Artificial Light at Night effects on the biological rhythm at the behavioral and molecular scales of the oyster Crassostrea gigas? THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167052. [PMID: 37714354 DOI: 10.1016/j.scitotenv.2023.167052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 09/01/2023] [Accepted: 09/11/2023] [Indexed: 09/17/2023]
Abstract
Artificial Light at Night (ALAN) is a fast-spreading threat to organisms, especially in coastal environments, where night lighting is increasing due to constant anthropization. Considering that ALAN affects a large diversity of coastal organisms, finding efficient solutions to limit these effects is of great importance but poorly investigated. The potential benefit of one strategy, in particular, should be studied since its use is growing: part-night lighting (PNL), which consists in switching off the lights for a few hours during nighttime. The aim of this study is to investigate the positive potential of the PNL strategy on the daily rhythm of the oyster Crassostrea gigas, a key species of coastal areas of ecological and commercial interest. Oysters were exposed to a control condition and three different ALAN modalities. A realistic PNL condition is applied, recreating a strategy of city policy in a coastal city boarding an urbanized bay (Lanton, Arcachon Bay, France). The PNL modality consists in switching off ALAN direct sources (5 lx) for 4 h (23-3 h) during which oysters are in darkness. Then, a PNL + skyglow (PNL + S) modality reproduces the previous one mimicking a skyglow (0.1 lx), an indirect ALAN source, during the direct lighting switch off, to get as close as possible to realistic conditions. Finally, the third ALAN condition mimics full-night direct lighting (FNL). Results revealed that PNL reduces some adverse effects of FNL on the behavioral daily rhythm. But, counterintuitively, PNL + S appears more harmful than FNL for some parameters of the behavioral daily rhythm. PNL + S modality is also the only one that affect oysters' clock and melatonin synthesis gene expression, suggesting physiological consequences. Thus, in realistic conditions, the PNL mitigation strategy might not be beneficial in the presence of skyglow, seeing worse for a coastal organism such as the oysters.
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Affiliation(s)
- Audrey Botté
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France
| | - Laura Payton
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France
| | - Elisa Lefeuvre
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France
| | - Damien Tran
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France.
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8
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Grenis K, Nufio C, Wimp GM, Murphy SM. Does artificial light at night alter moth community composition? Philos Trans R Soc Lond B Biol Sci 2023; 378:20220365. [PMID: 37899018 PMCID: PMC10613536 DOI: 10.1098/rstb.2022.0365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 08/28/2023] [Indexed: 10/31/2023] Open
Abstract
Ecological studies investigating the effects of artificial light at night (ALAN) have primarily focused on single or a few species, and seldom on community-level dynamics. As ALAN is a potential cause of insect and biodiversity declines, community-level perspectives are essential. We empirically tested the hypothesis that moth species differentially respond to ALAN and that these responses can cause shifts in community composition. We sampled moths from prairie fragments in Colorado, USA. We tested whether local light sources, sky glow, site area and/or vegetation affected moth community diversity. We found that increased sky glow decreased moth abundance and species richness and shifted community composition. Increased sky glow shifted moth community composition when light and bait traps were combined; notably this result appears to be driven entirely by moths sampled at bait traps, which is an unbiased sampling technique. Our results show that ALAN has significant effects on moth communities and that local light sources have contrasting effects on moth community composition compared to sky glow. It is imperative that we better understand the contrasting effects of types of ALAN to comprehend the overall impacts of light pollution on biodiversity declines. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Kylee Grenis
- Department of Biological Sciences, University of Denver, Denver, CO, 80210, USA
| | - César Nufio
- University of Colorado Museum of Natural History, University of Colorado Boulder, Boulder, CO, 80309, USA
- BioInteractive Department, Howard Hughes Medical Institute, Chevy Chase, MD, 20815, USA
| | - Gina M. Wimp
- Department of Biology, Georgetown University, Washington, DC, 20057, USA
| | - Shannon M. Murphy
- Department of Biological Sciences, University of Denver, Denver, CO, 80210, USA
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Seymoure B, Dell A, Hölker F, Kalinkat G. A framework for untangling the consequences of artificial light at night on species interactions. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220356. [PMID: 37899016 PMCID: PMC10613547 DOI: 10.1098/rstb.2022.0356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 09/08/2023] [Indexed: 10/31/2023] Open
Abstract
Although much evidence exists showing organismal consequences from artificial light at night (ALAN), large knowledge gaps remain regarding ALAN affecting species interactions. Species interactions occur via shared spatio-temporal niches among species, which may be determined by natural light levels. We review how ALAN is altering these spatio-temporal niches through expanding twilight or full Moon conditions and constricting nocturnal conditions as well as creating patches of bright and dark. We review literature from a database to determine if ALAN is affecting species interactions via spatio-temporal dynamics. The literature indicates a growing interest in ALAN and species interactions: 58% of the studies we analysed have been published since 2020. Seventy-five of 79 studies found ALAN altered species interactions. Enhancements and reductions of species interactions were equally documented. Many studies revealed ALAN affecting species interactions spatially, but few revealed temporal alterations. There are biases regarding species interactions and ALAN-most studies investigated predator-prey interactions with vertebrates as predators and invertebrates as prey. Following this literature review, we suggest avenues, such as remote sensing and animal tracking, that can guide future research on the consequences of ALAN on species interactions across spatial and temporal axes. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Brett Seymoure
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Anthony Dell
- National Great Rivers Research and Education Center, Alton, IL 62024, USA
- Department of Biology, WashingtonUniversity in St Louis, St Louis, MO 63130, USA
| | - Franz Hölker
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), 14195 Berlin, Germany
- Institute of Biology, Freie Universität Berlin, 12587 Berlin, Germany
| | - Gregor Kalinkat
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), 14195 Berlin, Germany
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Bucher SF, Uhde L, Weigelt A, Cesarz S, Eisenhauer N, Gebler A, Kyba C, Römermann C, Shatwell T, Hines J. Artificial light at night decreases plant diversity and performance in experimental grassland communities. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220358. [PMID: 37899022 PMCID: PMC10613542 DOI: 10.1098/rstb.2022.0358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/28/2023] [Indexed: 10/31/2023] Open
Abstract
Artificial light at night (ALAN) affects many areas of the world and is increasing globally. To date, there has been limited and inconsistent evidence regarding the consequences of ALAN for plant communities, as well as for the fitness of their constituent species. ALAN could be beneficial for plants as they need light as energy source, but they also need darkness for regeneration and growth. We created model communities composed of 16 plant species sown, exposed to a gradient of ALAN ranging from 'moonlight only' to conditions like situations typically found directly underneath a streetlamp. We measured plant community composition and its production (biomass), as well as functional traits of three plant species from different functional groups (grasses, herbs, legumes) in two separate harvests. We found that biomass was reduced by 33% in the highest ALAN treatment compared to the control, Shannon diversity decreased by 43% and evenness by 34% in the first harvest. Some species failed to establish in the second harvest. Specific leaf area, leaf dry matter content and leaf hairiness responded to ALAN. These responses suggest that plant communities will be sensitive to increasing ALAN, and they flag a need for plant conservation activities that consider impending ALAN scenarios. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Solveig Franziska Bucher
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Lia Uhde
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04109 Leipzig, Germany
| | - Alexandra Weigelt
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04109 Leipzig, Germany
| | - Simone Cesarz
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04109 Leipzig, Germany
| | - Nico Eisenhauer
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04109 Leipzig, Germany
| | - Alban Gebler
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04109 Leipzig, Germany
| | - Christopher Kyba
- Interdisciplinary Geographic Information Sciences, Ruhr-Universität Bochum, 44780 Bochum, Germany
- Remote Sensing and Geoinformatics, Deutsches GeoForschungsZentrum GFZ, Germany
| | - Christine Römermann
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Tom Shatwell
- Department of Lake Research, Helmholtz-Centre for Environmental Research – UFZ, 39114 Magdeburg, Germany
| | - Jes Hines
- Department of Plant Biodiversity, Institute of Ecology and Evolution with Herbarium Haussknecht and Botanical Garden, Friedrich Schiller University Jena, 07743 Jena, Germany
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04109 Leipzig, Germany
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11
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Fobert EK, Miller CR, Swearer SE, Mayer-Pinto M. The impacts of artificial light at night on the ecology of temperate and tropical reefs. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220362. [PMID: 37899007 PMCID: PMC10613546 DOI: 10.1098/rstb.2022.0362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/19/2023] [Indexed: 10/31/2023] Open
Abstract
Despite 22% of the world's coastal regions experiencing some degree of light pollution, and biologically important artificial light at night (ALAN) reaching large portions of the seafloor (greater than 75%) near coastal developments, the impacts of ALAN on temperate and tropical reefs are still relatively unknown. Because many reef species have evolved in response to low-light nocturnal environments, consistent daily, lunar, and seasonal light cycles, and distinct light spectra, these impacts are likely to be profound. Recent studies have found ALAN can decrease reproductive success of fishes, alter predation rates of invertebrates and fishes, and impact the physiology and biochemistry of reef-building corals. In this paper, we integrate knowledge of the role of natural light in temperate and tropical reefs with a synthesis of the current literature on the impacts of ALAN on reef organisms to explore potential changes at the system level in reef communities exposed to ALAN. Specifically, we identify the direct impacts of ALAN on individual organisms and flow on effects for reef communities, and present potential scenarios where ALAN could significantly alter system-level dynamics, possibly even creating novel ecosystems. Lastly, we highlight large knowledge gaps in our understanding of the overall impact of ALAN on reef systems. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Emily K. Fobert
- School of BioSciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Colleen R. Miller
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA
| | - Stephen E. Swearer
- National Centre for Coasts and Climate (NCCC), School of BioSciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Mariana Mayer-Pinto
- Centre for Marine Science and Innovation, Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, New South Wales 2052, Australia
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12
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Sanders D, Hirt MR, Brose U, Evans DM, Gaston KJ, Gauzens B, Ryser R. How artificial light at night may rewire ecological networks: concepts and models. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220368. [PMID: 37899020 PMCID: PMC10613535 DOI: 10.1098/rstb.2022.0368] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 06/13/2023] [Indexed: 10/31/2023] Open
Abstract
Artificial light at night (ALAN) is eroding natural light cycles and thereby changing species distributions and activity patterns. Yet little is known about how ecological interaction networks respond to this global change driver. Here, we assess the scientific basis of the current understanding of community-wide ALAN impacts. Based on current knowledge, we conceptualize and review four major pathways by which ALAN may affect ecological interaction networks by (i) impacting primary production, (ii) acting as an environmental filter affecting species survival, (iii) driving the movement and distribution of species, and (iv) changing functional roles and niches by affecting activity patterns. Using an allometric-trophic network model, we then test how a shift in temporal activity patterns for diurnal, nocturnal and crepuscular species impacts food web stability. The results indicate that diel niche shifts can severely impact community persistence by altering the temporal overlap between species, which leads to changes in interaction strengths and rewiring of networks. ALAN can thereby lead to biodiversity loss through the homogenization of temporal niches. This integrative framework aims to advance a predictive understanding of community-level and ecological-network consequences of ALAN and their cascading effects on ecosystem functioning. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Dirk Sanders
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK
| | - Myriam R. Hirt
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, 07737 Jena, Germany
| | - Ulrich Brose
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, 07737 Jena, Germany
| | - Darren M. Evans
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Kevin J. Gaston
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK
| | - Benoit Gauzens
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, 07737 Jena, Germany
| | - Remo Ryser
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, 07737 Jena, Germany
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13
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Parkinson E, Tiegs SD. Spectral composition of light-emitting diodes impacts aquatic and terrestrial invertebrate communities with potential implications for cross-ecosystem subsidies. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220361. [PMID: 37899013 PMCID: PMC10613537 DOI: 10.1098/rstb.2022.0361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 07/19/2023] [Indexed: 10/31/2023] Open
Abstract
Resource exchanges in the form of invertebrate fluxes are a key component of aquatic-terrestrial habitat coupling, but this interface is susceptible to human activities, including the imposition of artificial light at night. To better understand the effects of spectral composition of light-emitting diodes (LEDs)-a technology that is rapidly supplanting other lighting types-on emergent aquatic insects and terrestrial insects, we experimentally added LED fixtures that emit different light spectra to the littoral zone and adjacent riparian habitat of a pond. We installed four replicate LED treatments of different wavelengths (410, 530 and 630 nm), neutral white (4000 k) and a dark control, and sampled invertebrates in both terrestrial and over-water littoral traps. Invertebrate communities differed among light treatments and between habitats, as did total insect biomass and mean individual insect size. Proportional allochthonous biomass was greater in the riparian habitat and among some light treatments, demonstrating an asymmetrical effect of differently coloured LEDs on aquatic-terrestrial resource exchanges. Overall, our findings demonstrate that variation in wavelength from LEDs may impact the flux of resources between systems, as well as the communities of insects that are attracted to particular spectra of LED lighting, with probable implications for consumers. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Elizabeth Parkinson
- Department of Biological Sciences, Oakland University, Rochester, MI, 48309, USA
| | - Scott D. Tiegs
- Department of Biological Sciences, Oakland University, Rochester, MI, 48309, USA
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14
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Cox DTC, Gaston KJ. Global erosion of terrestrial environmental space by artificial light at night. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166701. [PMID: 37652384 DOI: 10.1016/j.scitotenv.2023.166701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 09/02/2023]
Abstract
Artificial light at night (ALAN) disrupts natural light cycles, with biological impacts that span from behaviour of individual organisms to ecosystem functions, and across bacteria, fungi, plants and animals. Global consequences have almost invariably been inferred from the geographic distribution of ALAN. How ALAN is distributed in environmental space, and the extent to which combinations of environmental conditions with natural light cycles have been lost, is also key. Globally (between 60°N and 56°S), we ordinated four bioclimatic variables at 1.61 * 1.21 km resolution to map the position and density of terrestrial pixels within nighttime environmental space. We then used the Black Marble Nighttime Lights product to determine where direct ALAN emissions were present in environmental space in 2012 and how these had expanded in environmental space by 2022. Finally, we used the World Atlas of Artificial Sky Brightness to determine the proportion of environmental space that is unaffected by ALAN across its spatial distribution. We found that by 2012 direct ALAN emissions occurred across 71.9 % of possible nighttime terrestrial environmental conditions, with temperate nighttime environments and highly modified habitats disproportionately impacted. From 2012 to 2022 direct ALAN emissions primarily grew within 34.4 % of environmental space where it was already present, with this growth concentrated in tropical environments. Additionally considering skyglow, just 13.2 % of environmental space now only experiences natural light cycles throughout its distribution. With opportunities to maintain much of environmental space under such cycles fast disappearing, the removal, reduction and amelioration of ALAN from areas of environmental space in which it is already widespread is critical.
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Affiliation(s)
- Daniel T C Cox
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK.
| | - Kevin J Gaston
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK
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15
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Zhang M, Gao X, Luo Q, Lin S, Lyu M, Luo X, Ke C, You W. Ecological benefits of artificial light at night (ALAN): Accelerating the development and metamorphosis of marine shellfish larvae. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166683. [PMID: 37652388 DOI: 10.1016/j.scitotenv.2023.166683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/22/2023] [Accepted: 08/27/2023] [Indexed: 09/02/2023]
Abstract
Urbanization has led to increasing use of artificial light at night (ALAN), which has rapidly become an important source of pollution in many cities. To identify the ALAN effects on the embryonic development of the Pacific abalone Haliotis discus hannai, we first exposed larvae to natural light with a light period of 12 L:12D (control, Group CTR). We then exposed larvae to three different light regimes. Larvae in Group NL were exposed to full spectrum artificial light from 18:00 to 00:00 to simulate the lighting condition at night, whereas Groups BL and YL were illuminated at the same time interval with 450 nm of short-wavelength blue light and 560 nm of long-wavelength orange light, respectively, to simulate billboard lighting at night. There were significantly higher hatching success and metamorphosis rates of larvae in Group BL than in Group YL or CTR (P < 0.05). The larvae in Group YL had the highest abnormality rate and took the longest time to complete metamorphosis. Transcriptomic studies revealed significantly higher expression levels of genes related to RNA transport, DNA replication, and protein processing in endoplasmic reticulum pathways in Group BL compared to the other groups. In the metabolomic analysis, we identified prostaglandin B1, tyramine, d-fructose 6-phosphate, L-adrenaline, leukotriene C4, and arachidonic acid as differential metabolic markers, as they play a vital part in helping larvae adapt to different ALAN conditions. Multi-omics correlation analysis of pairwise comparisons between all of the groups suggested that the biosynthesis of unsaturated fatty acids (FAs) and arachidonic acid metabolism pathways were significantly enriched (P < 0.05). Further quantitative analysis of the fatty acid (FA) contents revealed that 42 out of 50 FAs were down-regulated in Group BL and up-regulated in Group YL, which suggested that the synthesis, catabolism, and metabolism of FAs are crucial for the larval response to different spectral components of ALAN. For the first time, we report positive rather than negative effects of artificial blue light at night on the embryonic development of a benthic marine species. These results are significant for unbiased and full-scale assessment of the ecological effects of ALAN and for understanding the structural stability of the marine benthic community.
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Affiliation(s)
- Mo Zhang
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Xiaolong Gao
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.
| | - Qi Luo
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Shihui Lin
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Mingxin Lyu
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Xuan Luo
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Caihuan Ke
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Weiwei You
- State Key Laboratory of Mariculture Breeding, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.
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16
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Horton KG, Buler JJ, Anderson SJ, Burt CS, Collins AC, Dokter AM, Guo F, Sheldon D, Tomaszewska MA, Henebry GM. Artificial light at night is a top predictor of bird migration stopover density. Nat Commun 2023; 14:7446. [PMID: 38049435 PMCID: PMC10696060 DOI: 10.1038/s41467-023-43046-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 10/30/2023] [Indexed: 12/06/2023] Open
Abstract
As billions of nocturnal avian migrants traverse North America, twice a year they must contend with landscape changes driven by natural and anthropogenic forces, including the rapid growth of the artificial glow of the night sky. While airspaces facilitate migrant passage, terrestrial landscapes serve as essential areas to restore energy reserves and often act as refugia-making it critical to holistically identify stopover locations and understand drivers of use. Here, we leverage over 10 million remote sensing observations to develop seasonal contiguous United States layers of bird migrant stopover density. In over 70% of our models, we identify skyglow as a highly influential and consistently positive predictor of bird migration stopover density across the United States. This finding points to the potential of an expanding threat to avian migrants: peri-urban illuminated areas may act as ecological traps at macroscales that increase the mortality of birds during migration.
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Affiliation(s)
- Kyle G Horton
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado, USA.
| | - Jeffrey J Buler
- Department of Entomology and Wildlife Ecology, University of Delaware, Newark, Delaware, USA
| | - Sharolyn J Anderson
- Natural Sounds and Night Skies Division, National Park Service, 1201 Oakridge Dr., Suite 100, Fort Collins, CO, 80525, USA
| | - Carolyn S Burt
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado, USA
| | - Amy C Collins
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado, USA
- Conservation Science Partners, Truckee, CA, USA
| | - Adriaan M Dokter
- Cornell Lab of Ornithology, Cornell University, Ithaca, New York, USA
| | - Fengyi Guo
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA
| | - Daniel Sheldon
- Manning College of Information and Computer Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Monika Anna Tomaszewska
- Center for Global Change and Earth Observations, Michigan State University, East Lansing, Michigan, USA
| | - Geoffrey M Henebry
- Center for Global Change and Earth Observations, Michigan State University, East Lansing, Michigan, USA
- Department of Geography, Environment, and Spatial Sciences, Michigan State University, East Lansing, Michigan, USA
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17
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Botte A, Payton L, Tran D. The effects of artificial light at night on behavioral rhythm and related gene expression are wavelength dependent in the oyster Crassostrea gigas. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:120375-120386. [PMID: 37938485 DOI: 10.1007/s11356-023-30793-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 10/27/2023] [Indexed: 11/09/2023]
Abstract
Artificial light at night (ALAN) constitutes a growing threat to coastal ecosystems by altering natural light cycles, which could impair organisms' biological rhythms, with resulting physiological and ecological consequences. Coastal ecosystems are strongly exposed to ALAN, but its effects on coastal organisms are poorly studied. Besides ALAN's intensity, ALAN's quality exposure may change the impacts on organisms. This study aims to characterize the effects of different ALAN's spectral compositions (monochromatic wavelength lights in red (peak at 626 nm), green (peak at 515 nm), blue (peak at 467 nm), and white (410-680 nm) light) at low and realistic intensity (1 lx) on the oyster Crassostrea gigas daily rhythm. Results reveal that all ALAN's treatments affect the oysters' daily valve activity rhythm in different manners and the overall expression of the 13 studied genes. Eight of these genes are involved in the oyster's circadian clock, 2 are clock-associated genes, and 3 are light perception genes. The blue light has the most important effects on oysters' valve behavior and clock and clock-associated gene expression. Interestingly, red and green lights also show significant impacts on the daily rhythm, while the lowest impacts are shown with the green light. Finally, ALAN white light shows the same impact as the blue one in terms of loss of rhythmic oysters' percentage, but the chronobiological parameters of the remaining rhythmic oysters are less disrupted than when exposed to each of the monochromatic light's treatments alone. We conclude that ALAN's spectral composition does influence its effect on oysters' daily rhythm, which could give clues to limit physiological and ecological impacts on coastal environments.
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Affiliation(s)
- Audrey Botte
- University of Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, 33120, Arcachon, France
| | - Laura Payton
- University of Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, 33120, Arcachon, France
| | - Damien Tran
- University of Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, 33120, Arcachon, France.
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18
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Lopes ACC, de Mattos BO, Marcon JL, Vera LM, López-Olmeda JF, Sánchez-Vázquez FJ, Carvalho TB. Does exposure to moonlight affect day/night changes in melatonin and metabolic parameters in Amazonian fish? Comp Biochem Physiol A Mol Integr Physiol 2023; 284:111489. [PMID: 37474098 DOI: 10.1016/j.cbpa.2023.111489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 07/22/2023]
Abstract
Lunar cycle modulates the rhythmic activity patterns of many animals, including fish. The effect of the moonlight cycle on daily melatonin and metabolic parameters was evaluated in matrinxã (Brycon amazonicus) subjected to external natural lighting. Eighty juvenile were distributed in 4 tanks of 1m3 (20 fish/tank) and divided into two groups. One group was exposed to the full moon and the other group to the new moon for 30 days, which corresponds to the duration of the lunar period. At the end of the lunar phase, 6 fish from each group were anesthetized to collect blood, tissue and eye samples at midday and midnight. The comparison between the light and dark periods revealed a significant increase in plasma and ocular melatonin in the last period. However, there was no significant difference for plasma melatonin between moons. Ocular melatonin presented higher concentrations during the new moon. Glucose, total proteins, cortisol, liver glutathione and gill lipid peroxidation were higher in the full moon compared to in the new moon. Plasma triglyceride was higher during the night for the full moon, and the opposite was found for the new moon. Total cholesterol values were higher at night regardless the moon phase. Glutathione in the gills and lipid peroxidation in the liver showed no significant differences. These results highlight the importance of considering both the day and lunar cycles for melatonin and metabolic parameters in species of commercial interest and susceptible to stressful situations in rearing conditions.
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Affiliation(s)
| | - Bruno Olivetti de Mattos
- Laboratory of Feeding Behavior and Fish Nutrition, Center of Agricultural Sciences, Environmental and Biological, Campus Cruz das Almas, Federal University of Recôncavo Bahia (UFRB), 44380-000, Bahia, Brazil.
| | - Jaydione Luiz Marcon
- Postgraduate Program in Zoology, Federal University of Amazonas (UFAM), 69080-900, Amazonas, Brazil; Institute of Biological Sciences, Department of Physiological Sciences, Federal University of Amazonas (UFAM), 69080-900, Amazonas, Brazil
| | - Luisa María Vera
- Department of Physiology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - José Fernando López-Olmeda
- Department of Physiology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - Francisco Javier Sánchez-Vázquez
- Department of Physiology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - Thaís Billalba Carvalho
- Postgraduate Program in Zoology, Federal University of Amazonas (UFAM), 69080-900, Amazonas, Brazil; Laboratory of Feeding Behavior and Fish Nutrition, Center of Agricultural Sciences, Environmental and Biological, Campus Cruz das Almas, Federal University of Recôncavo Bahia (UFRB), 44380-000, Bahia, Brazil
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Kobisk A, Kwiatkowski MA. Effects of anthropogenic light on anuran calling site. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:122005. [PMID: 37330191 DOI: 10.1016/j.envpol.2023.122005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 05/20/2023] [Accepted: 06/08/2023] [Indexed: 06/19/2023]
Abstract
The natural environment can be negatively impacted by a variety of human activities, including the production of artificial light at night. Recent studies suggest that pollution from anthropogenic light alters animal behavior. Despite being highly nocturnal, little attention has been given to anurans and the effects artificial light at night has on their behavior. This study investigated whether artificial light influenced male call site selection in east Texas anurans. Ambient light levels were quantified at five sites that varied in urbanization and artificial light levels. Calling males were located and ambient light was then measured at the male's call location. Light levels at those call locations were compared to the general light environment as measured at random locations in the area. There was a consistent pattern where males at the brightest sites called from locations darker than the general light environment. However, male call locations at the brightest sites were generally brighter than those at the darker sites suggesting that, while male anurans avoid illuminated areas for calling, males in more urbanized populations may be unable to do so. As such, male anurans at sites with higher light pollution may experience a form of habitat loss where preferred darker habitat is not available.
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Affiliation(s)
- Ashley Kobisk
- Department of Biology, Stephen F. Austin State University, P.O. Box 13003, Nacogdoches, TX, 75962, USA
| | - Matthew A Kwiatkowski
- Department of Biology, Stephen F. Austin State University, P.O. Box 13003, Nacogdoches, TX, 75962, USA.
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20
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McGlade CLO, Capilla-Lasheras P, Womack RJ, Helm B, Dominoni DM. Experimental light at night explains differences in activity onset between urban and forest great tits. Biol Lett 2023; 19:20230194. [PMID: 37670610 PMCID: PMC10480697 DOI: 10.1098/rsbl.2023.0194] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 08/10/2023] [Indexed: 09/07/2023] Open
Abstract
Artificial light at night (ALAN) is rapidly increasing and so is scientific interest in its ecological and evolutionary consequences. In wild species, ALAN can modify and disrupt biological rhythms. However, experimental proof of such effects of ALAN in the wild is still scarce. Here, we compared diel rhythms of incubation behaviour, inferred from temperature sensors, of female great tits (Parus major) breeding in urban and forest sites. In parallel, we simulated ALAN by mounting LED lights (1.8 lx) inside forest nest-boxes, to determine the potentially causal role of ALAN affecting diel patterns of incubation. Urban females had an earlier onset of activity compared to forest females. Experimentally ALAN-exposed forest females were similar to urban females in their advanced onset of activity, compared to unexposed forest birds. However, forest females exposed to experimental ALAN, but not urban females, were more restless at night than forest control females. Our findings demonstrate that ALAN can explain the early activity timing in incubating urban great tits, but its effects on sleep disturbance in the forest are not reflected in urban females. Consequently, future research needs to address potential effects of ALAN-induced timing on individual health, fitness and population dynamics, in particular in populations that were not previously affected by light pollution.
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Affiliation(s)
| | - Pablo Capilla-Lasheras
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
| | - Robyn J. Womack
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
| | - Barbara Helm
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
- Swiss Ornithological Institute, 6204 Sempach, Switzerland
| | - Davide M. Dominoni
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK
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21
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Pan R, Zhang G, Deng F, Lin W, Pan J. Effects of red light on sleep and mood in healthy subjects and individuals with insomnia disorder. Front Psychiatry 2023; 14:1200350. [PMID: 37692298 PMCID: PMC10484593 DOI: 10.3389/fpsyt.2023.1200350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/04/2023] [Indexed: 09/12/2023] Open
Abstract
Introduction This study aimed to determine the influence of red light on objective sleep and the relationship between mood and sleep among individuals with insomnia disorder (ID). Method 57 individuals with insomnia symptoms and 57 healthy participants were randomly divided into three groups (red- and white-light groups, and the black control group), which received different light treatments for 1 h before bedtime. The emotions and subjective alertness of participants were evaluated using Positive and Negative Affect Schedule scales (PANAS) and Karolinska Sleepiness Scale (KSS), their sleeping data were recorded using polysomnography (PSG). Result The negative emotion scores were higher in the healthy subject-red light (HS-RL) group than in the HS-white light (WL) and HS-black control (BC) groups (p < 0.001). The anxiety and negative emotion scores were higher in the ID-RL group than in the ID-WL and ID-BC groups (p = 0.007 and p < 0.001, respectively). The KSS scores were lower in the RL group than in the WL and BC groups for both HS and ID group (both p < 0.001). The SOL was shorter in the HS-RL group than in HS-WL group (p = 0.019). Compared with the HS-BC group, the HS-RL group had an increase in microarousal index (MAI) and N1% (p = 0.034 and p = 0.021, respectively), while the total sleep time (TST) and sleep efficiency (SE) decreased (p = 0.001 and p < 0.001, respectively). Compared with the ID-WL group, the SOL was shorter in the ID-RL group (p = 0.043), while TST, SE, number of microarousals (NMA), and numbers of cycles of REM period were increased (p = 0.016, p = 0.046, p = 0.001, and p = 0.041, respectively). Compared with the ID-BC group, the ID-RL group had increases in the SOL, WASO, and the numbers of cycles and NMA in REM period (p = 0.038, p = 0.005, p = 0.045, and p = 0.033, respectively), and a decrease in SE (p = 0.014). The effects of ID-WL (vs. ID-RL group) and ID-BC (vs. ID-RL group) on SOL were mediated by negative emotions (mediating effects were - 37.626 and - 33.768, respectively). Conclusion Red light can increase subjective alertness, anxiety, and negative emotions in both healthy subjects and people with ID, which can affect sleep directly or indirectly via the mediating effect of negative emotions.
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Affiliation(s)
- Rong Pan
- Department of Psychology, The Third People’s Hospital of Zhaoqing, Zhaoqing, Guangdong Province, China
| | - Guimei Zhang
- Department of Psychiatry, Sleep Medicine Center, First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Fangyi Deng
- Department of Psychiatry, Sleep Medicine Center, First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Weifeng Lin
- Department of Neurology, Dongguan People’s Hospital (Affiliated Dongguan People’s Hospital, Southern Medical University), Guangzhou, Guangdong Province, China
| | - Jiyang Pan
- Department of Psychiatry, Sleep Medicine Center, First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China
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22
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Jones TM, McNamara KB. Ecological light pollution. Curr Biol 2023; 33:R843-R844. [PMID: 37607475 DOI: 10.1016/j.cub.2023.06.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Therésa M Jones and Kathryn B McNamara introduce the ecological effects of artificial light at night.
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Affiliation(s)
- Therésa M Jones
- School of BioSciences, University of Melbourne, 3010 VIC, Australia.
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23
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Trethewy M, Mayer-Pinto M, Dafforn KA. Urban shading and artificial light at night alter natural light regimes and affect marine intertidal assemblages. MARINE POLLUTION BULLETIN 2023; 193:115203. [PMID: 37392591 DOI: 10.1016/j.marpolbul.2023.115203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 06/15/2023] [Accepted: 06/17/2023] [Indexed: 07/03/2023]
Abstract
Urban development in many coastal cities has resulted in altered natural light regimes, with many coastal habitats being artificially shaded during the daytime by built structures such as seawalls and piers, while artificial light emitted from buildings and associated infrastructure creates pollution at night. As a result, these habitats may experience changes to community structure and impacts on key ecological processes such as grazing. This study investigated how changes to light regimes affect the abundance of grazers on natural and artificial intertidal habitats in Sydney Harbour, Australia. We also examined whether differences in patterns of responses to shading or artificial light at night (ALAN) varied across different areas within the Harbour, characterised by different overall levels of urbanisation. As predicted, light intensity was greater during the daytime on rocky shores than seawalls at the more urbanised sites of the harbour. We found a negative relationship between the abundance of grazers and increasing light during the daytime on rocky shores (inner harbour) and seawalls (outer harbour). We found similar patterns at night on rocky shores, with a negative relationship between the abundance of grazers and light. However, on seawalls, grazer abundances increased with increasing night-time lux levels, but this was mainly driven by one site. Overall, we found the opposite patterns for algal cover. Our findings corroborate those of previous studies that found that urbanisation can significantly affect natural light cycles, with consequences to ecological communities.
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Affiliation(s)
- Megan Trethewy
- School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia
| | - Mariana Mayer-Pinto
- Centrefor Marine Science and Innovation, Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Katherine A Dafforn
- School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia
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24
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Wayman JP, Atkinson G, Jahangir M, White D, Matthews TJ, Antoniou M, Reynolds SJ, Sadler JP. L-band radar quantifies major disturbance of birds by fireworks in an urban area. Sci Rep 2023; 13:12085. [PMID: 37495643 PMCID: PMC10372142 DOI: 10.1038/s41598-023-39223-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/21/2023] [Indexed: 07/28/2023] Open
Abstract
Fireworks and other pyrotechnics are acknowledged as sources of disturbance to wildlife, with evidence that many species react adversely to their sight and sound at discharge. However, how firework releases impact wildlife within a city landscape is poorly understood. Here, we explore the effect of fireworks on urban birds using an L-band staring radar (90-degree sector out to a 5 km range) to capture bird activity derived from flight tracks (i.e. 3D visualisation of individual flying birds built from radar detections) within the city of Birmingham, UK. Comparing the tracks between baseline periods with no fireworks and periods where fireworks are commonly discharged using a null model indicated that birds flew at higher elevations during firework periods (standardised effect sizes of 17.11, 26.54 and 5.83, for Diwali, Bonfire Night, and New Year's Eve, respectively). Birds also flew in more significant numbers (standardised effect sizes of 23.41, 7.98 and 7.19 for Diwali, Bonfire Night, and New Year's Eve, respectively). Therefore, bird activity was elevated during firework events at a time of night when many would otherwise be roosting. Such disturbance may have implications for avian biology since large public firework events occur at colder times of the year in the UK when birds have elevated thermoregulatory costs.
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Affiliation(s)
- Joseph P Wayman
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, Edgbaston, UK.
| | - George Atkinson
- Microwave Integrated Systems Laboratory, School of Engineering, University of Birmingham, Birmingham, Edgbaston, UK
| | - Mohammed Jahangir
- Microwave Integrated Systems Laboratory, School of Engineering, University of Birmingham, Birmingham, Edgbaston, UK
| | - Daniel White
- Microwave Integrated Systems Laboratory, School of Engineering, University of Birmingham, Birmingham, Edgbaston, UK
| | - Thomas J Matthews
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, Edgbaston, UK
- CE3C - Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group/CHANGE - Global Change and Sustainability Institute and Universidade dos Açores - Faculty of Agricultural Sciences and Environment, PT-9700042, Angra do Heroísmo, Açores, Portugal
- Birmingham Institute of Forest Research, University of Birmingham, Birmingham, UK
| | - Michail Antoniou
- Microwave Integrated Systems Laboratory, School of Engineering, University of Birmingham, Birmingham, Edgbaston, UK
| | - S James Reynolds
- Centre for Ornithology, School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
- The Army Ornithological Society (AOS), c/o Prince Consort Library, Knollys Road, Aldershot, Hampshire, UK
| | - Jon P Sadler
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, Edgbaston, UK
- Birmingham Institute of Forest Research, University of Birmingham, Birmingham, UK
- Centre for Ornithology, School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
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25
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Christoforou E, Dominoni D, Lindström J, Diamantopoulou C, Czyzewski J, Mirzai N, Spatharis S. The effects of artificial light at night (ALAN) on the gaping activity and feeding of mussels. MARINE POLLUTION BULLETIN 2023; 192:115105. [PMID: 37290299 DOI: 10.1016/j.marpolbul.2023.115105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/21/2023] [Accepted: 05/25/2023] [Indexed: 06/10/2023]
Abstract
Artificial Light at Night (ALAN) is a common environmental pollutant which affects >22 % of the world's coastlines. However, the impact of ALAN wavelengths on coastal organisms is under-investigated. Here, we tested the impact of red, green, and white ALAN on the gaping activity and phytoplankton consumption of Mytilus edulis mussels and compared these to dark night. Mussels exhibited a semi-diel activity pattern. Although ALAN did not significantly affect the time open nor the phytoplankton consumption, it did have a colour-specific effect on the gaping frequency with red and white ALAN resulting in lower activity compared to the dark night. Green ALAN caused higher gaping frequency and a negative relationship between consumption and proportion of time open compared to the other treatments. Our findings suggest colour-specific ALAN effects on mussels and call for further investigation on the associated physiological mechanisms and potential ecological consequences.
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Affiliation(s)
- Eleni Christoforou
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, G12 8QQ Glasgow, UK; Cyprus University of Technology, Department of Chemical Engineering, 3036 Limassol, Cyprus.
| | - Davide Dominoni
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, G12 8QQ Glasgow, UK
| | - Jan Lindström
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, G12 8QQ Glasgow, UK
| | - Christina Diamantopoulou
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, G12 8QQ Glasgow, UK; University of Amsterdam, Institute for Biodiversity and Ecosystem Dynamics, 1098 XH Amsterdam, Netherlands
| | - Jakub Czyzewski
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, BioElectronics Unit, G12 8QQ Glasgow, UK
| | - Nosrat Mirzai
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, BioElectronics Unit, G12 8QQ Glasgow, UK
| | - Sofie Spatharis
- University of Glasgow, School of Biodiversity, One Health & Veterinary Medicine, G12 8QQ Glasgow, UK
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26
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Botté A, Payton L, Tran D. Artificial light at night at environmental intensities disrupts daily rhythm of the oyster Crassostrea gigas. MARINE POLLUTION BULLETIN 2023; 191:114850. [PMID: 37019034 DOI: 10.1016/j.marpolbul.2023.114850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 05/13/2023]
Abstract
Artificial Light At Night (ALAN) masks the natural light cycles and thus can disturb the synchronization of organisms' biological rhythms with their environment. Although coastlines are highly exposed to this growing threat, studies concerning the impacts of ALAN on coastal organisms remain scarce. In this study, we investigated the ALAN exposure effects at environmentally realistic intensities (0.1, 1, 10, 25 lx) on the oyster Crassostrea gigas, a sessile bivalve subject to light pollution on shores. We focused on the effects on oyster's daily rhythm at behavioral and molecular levels. Our results showed that ALAN disrupts the oyster's daily rhythm by increasing valve activity and annihilating day / night differences of expression of circadian clock and clock-associated genes. ALAN effects occur starting from 0.1 lx, in the range of artificial skyglow illuminances. We concluded that realistic ALAN exposure affects oysters' biological rhythm, which could lead to severe physiological and ecological consequences.
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Affiliation(s)
- Audrey Botté
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France
| | - Laura Payton
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France
| | - Damien Tran
- Univ. Bordeaux, CNRS, Bordeaux INP, EPOC, UMR 5805, F-33120 Arcachon, France.
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27
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Viljoen A, Oosthuizen MK. Dim light at night affects the locomotor activity of nocturnal African pygmy mice ( Mus minutoides) in an intensity-dependent manner. Proc Biol Sci 2023; 290:20230526. [PMID: 37072046 PMCID: PMC10113032 DOI: 10.1098/rspb.2023.0526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 03/27/2023] [Indexed: 04/20/2023] Open
Abstract
Rodents are integral components of ecosystems as they provide several important ecosystem services. Despite their importance as prey, pollinators and seed distributors, African rodents are largely understudied. The effect of anthropogenic changes such as artificial light at night extends past urban areas to peri-urban and rural habitats, and can have profound effects on entire ecosystems. We investigated the effect of dim light at night (dLAN) on the locomotor activity rhythms of the African pygmy mouse (Mus minutoides). Pygmy mice showed a dramatic, intensity-dependent reduction in their locomotor activity when subjected to dLAN, which was accompanied by a delay in the activity onset. We also considered masking responses with a dark pulse (DP) during the day and a light pulse at night. All animals became inactive in response to a light pulse during the night, whereas approximately half of the animals showed activity during a DP in the day. Our results suggest that the African pygmy mouse is highly sensitive to light and that their activity is strongly masked by light. In their natural environment, vegetation could shield pygmy mice against high light levels; however, other anthropogenic disturbances can alter the behaviour of these animals and could affect their survival.
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Affiliation(s)
- A. Viljoen
- Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
| | - M. K. Oosthuizen
- Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
- Mammal Research Institute, University of Pretoria, Pretoria 0002, South Africa
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28
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Lech JC, Halma MT, Obajuluwa AO, Baker M, Hamblin MR. Fiat Lux: Light and Pedagogy for the 21st Century. Ann Neurosci 2023; 30:133-142. [PMID: 37706102 PMCID: PMC10496794 DOI: 10.1177/09727531221136646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 11/11/2022] [Indexed: 09/15/2023] Open
Abstract
Background The relationship between the quality of the learning environment and student outcomes is receiving more serious attention from educational psychologists, neurologists, ophthalmologists, orthopedists, surgeons, oncologists, architects, ergonomists, nutritionists, and Michelin star chefs. There is a role for ergonomic office and school design to positively impact worker and student productivity, and one design attribute drawing attention is the indoor lit environment. In this review, we expand upon the role that light plays in education, as it has enabled millions of pupils to read at late hours, which were previously too dark. However, still unappreciated is the biological effects of artificial light on circadian rhythm and its subsequent impacts on health and learning outcomes. Summary This review describes the current state of light in the educational environment, its impact, and the effect of certain inexpensive and easy-to-implement adaptations to better support student growth, learning and development. We find that the current lighting environment for pupils is sub-optima based on biological mechanism and may be improved through cost effective interventions. These interventions can achieve greater biological harmonization and improve learner outcomes. Key Message The impact of the lighting environment in educational institutions on pupil biology has received minimal attention thus far. The current lighting environment in schools is not conducive to student health and educational performance. Cost-effective approaches can have an outsized impact on student health and educational attainment. We strongly recommend educational institutions take the lit environment into account when designing educational programs.
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Affiliation(s)
- James C. Lech
- * These authors share joint first authorship
- Vrije Universiteit Amsterdam, De Boelelaan, Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Academic Medical Center, University of Amsterdam (UMC), Amsterdam, The Netherlands
- National Research Foundation, South Africa
- International EMF Project & Optical Radiation, World Health Organization, Pretoria, South Africa
| | - Matthew T.J. Halma
- * These authors share joint first authorship
- Vrije Universiteit Amsterdam, De Boelelaan, Amsterdam, The Netherlands
| | - Adejoke O. Obajuluwa
- Biotechnology Unit, Department of Biological Sciences, Afe Babalola University, Olusegun Obasanjo Way, Ado Ekiti, Nigeria
| | - Malcolm Baker
- † Passed away June 16, 2021
- Department of Neurology, 1 Military Hospital, Pretoria, Department of Defence, South Africa Military Health Service Pretoria
- Department of Neurology, University of Pretoria, South Africa
| | - Michael R. Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein, South Africa
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29
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Gilbert NA, McGinn KA, Nunes LA, Shipley AA, Bernath-Plaisted J, Clare JDJ, Murphy PW, Keyser SR, Thompson KL, Maresh Nelson SB, Cohen JM, Widick IV, Bartel SL, Orrock JL, Zuckerberg B. Daily activity timing in the Anthropocene. Trends Ecol Evol 2023; 38:324-336. [PMID: 36402653 DOI: 10.1016/j.tree.2022.10.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/12/2022] [Accepted: 10/27/2022] [Indexed: 11/17/2022]
Abstract
Animals are facing novel 'timescapes' in which the stimuli entraining their daily activity patterns no longer match historical conditions due to anthropogenic disturbance. However, the ecological effects (e.g., altered physiology, species interactions) of novel activity timing are virtually unknown. We reviewed 1328 studies and found relatively few focusing on anthropogenic effects on activity timing. We suggest three hypotheses to stimulate future research: (i) activity-timing mismatches determine ecological effects, (ii) duration and timing of timescape modification influence effects, and (iii) consequences of altered activity timing vary biogeographically due to broad-scale variation in factors compressing timescapes. The continued growth of sampling technologies promises to facilitate the study of the consequences of altered activity timing, with emerging applications for biodiversity conservation.
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Affiliation(s)
- Neil A Gilbert
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Kate A McGinn
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Laura A Nunes
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Amy A Shipley
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA; School of Natural Resources, University of Missouri, Columbia, MO 65211, USA
| | - Jacy Bernath-Plaisted
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - John D J Clare
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA; Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720, USA
| | - Penelope W Murphy
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Spencer R Keyser
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Kimberly L Thompson
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA; German Centre for Integrative Biodiversity Research (iDiv), 04103 Halle-Jena-Leipzig, Germany
| | - Scott B Maresh Nelson
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Jeremy M Cohen
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA; Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, USA
| | - Ivy V Widick
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Savannah L Bartel
- Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - John L Orrock
- Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Benjamin Zuckerberg
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI 53706, USA.
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30
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The effects of light pollution on migratory animal behavior. Trends Ecol Evol 2023; 38:355-368. [PMID: 36610920 DOI: 10.1016/j.tree.2022.12.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 12/05/2022] [Accepted: 12/09/2022] [Indexed: 01/07/2023]
Abstract
Light pollution is a global threat to biodiversity, especially migratory organisms, some of which traverse hemispheric scales. Research on light pollution has grown significantly over the past decades, but our review of migratory organisms demonstrates gaps in our understanding, particularly beyond migratory birds. Research across spatial scales reveals the multifaceted effects of artificial light on migratory species, ranging from local and regional to macroscale impacts. These threats extend beyond species that are active at night - broadening the scope of this threat. Emerging tools for measuring light pollution and its impacts, as well as ecological forecasting techniques, present new pathways for conservation, including transdisciplinary approaches.
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31
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Gaston KJ, Gardner AS, Cox DTC. Anthropogenic changes to the nighttime environment. Bioscience 2023; 73:280-290. [PMID: 37091747 PMCID: PMC10113933 DOI: 10.1093/biosci/biad017] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/16/2022] [Accepted: 02/23/2023] [Indexed: 04/25/2023] Open
Abstract
How the relative impacts of anthropogenic pressures on the natural environment vary between different taxonomic groups, habitats, and geographic regions is increasingly well established. By contrast, the times of day at which those pressures are most forcefully exerted or have greatest influence are not well understood. The impact on the nighttime environment bears particular scrutiny, given that for practical reasons (e.g., researchers themselves belong to a diurnal species), most studies on the impacts of anthropogenic pressures are conducted during the daytime on organisms that are predominantly day active or in ways that do not differentiate between daytime and nighttime. In the present article, we synthesize the current state of knowledge of impacts of anthropogenic pressures on the nighttime environment, highlighting key findings and examples. The evidence available suggests that the nighttime environment is under intense stress across increasing areas of the world, especially from nighttime pollution, climate change, and overexploitation of resources.
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Affiliation(s)
| | - Alexandra S Gardner
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, United Kingdom
| | - Daniel T C Cox
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, United Kingdom
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32
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Aguilera MA, Rojas A, Bulleri F, Thiel M. Breakwaters as habitats for synanthropes: Spatial associations of vertebrates and vegetation with anthropogenic litter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 862:160753. [PMID: 36513231 DOI: 10.1016/j.scitotenv.2022.160753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Urban infrastructures can provide 'novel' habitats for marine and terrestrial animals and plants, enhancing their ability to adapt to urban environments. In particular, coastal infrastructures characterized by a complex three-dimensional morphology, such as breakwaters, could provide species refuges and food. We investigated the role of breakwaters in providing habitat for vertebrates and plants, and the influence of anthropogenic litter in regulating the value of these structures as habitat. We sampled vertebrate and plant species and quantified the amount of anthropogenic litter on breakwaters and adjacent rocky habitats at several sites in three different countries (Italy, Spain and Chile). We found breakwaters to accumulate more litter items (e.g. especially plastics) than adjacent rocky habitats by means of their large-scale (i.e., 1 m) structural complexity. Birds, which used the artificial infrastructure as transitory habitat, reached similar abundances in breakwaters compared with adjacent rocky platforms. In contrast, synanthropic mammal species, such as Rattus norvegicus and feral cats, were slightly more frequent on breakwaters and appeared to use them as permanent habitat. Plants were frequent in the upper zone of breakwaters and, even though many macrophyte species can trap litter, their cover correlated negatively with anthropogenic litter density. Therefore, breakwaters provide either transitory or permanent habitats for different species, despite functioning as a sink for anthropogenic litter. Thus, new infrastructure should be designed with lower structural complexity in their supralittoral zone limiting the proliferation of synanthropic species. In addition, restricting public access to sensitive areas and enforcing littering fines could enhance the ecological value of these novel habitats by reducing the benefits to pest species.
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Affiliation(s)
- Moisés A Aguilera
- Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Diagonal Las Torres, 2640 Peñalolén, Santiago, Chile.
| | - Ariel Rojas
- Departamento de Calidad y Laboratorio, Empresa AQUADEUS S.L. Crta. El ballestero, Km. 2, 02340 Robledo, Albacete, Spain
| | - Fabio Bulleri
- Dipartimento di Biologia, University of Pisa, CoNISMa, Pisa, Italy
| | - Martin Thiel
- Departamento de Biología Marina, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile; Center for Ecology and Sustainable Management of Oceanic Islands, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile; Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
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33
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Artifical light at night triggers slight transcriptomic effects on melatonin signaling but not synthesis in tadpoles of two anuran species. Comp Biochem Physiol A Mol Integr Physiol 2023; 280:111386. [PMID: 36740169 DOI: 10.1016/j.cbpa.2023.111386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023]
Abstract
The worldwide expansion of artificial light at night (ALAN) is acknowledged as a threat to biodiversity through alterations of the natural photoperiod triggering the disruption of physiological functions. In vertebrates, melatonin production during the dark phase can be decreased or suppressed by nocturnal light as shown in many taxa. But the effect of ALAN at low intensity mimicking light pollution in peri-urban area has never been investigated in amphibians. We filled this gap by studying the impact of low ALAN levels on the expression of genes related to melatonin synthesis and signaling in two anurans (agile frog, Rana dalmatina, and common toad, Bufo bufo). Circadian expression of genes encoding enzymes catalyzing melatonin synthesis (aralkylamine N-acetyltransferase, AANAT and acetylserotonin O-methyltransferase, ASMT) or melatonin receptors (Mel1a, Mel1b and Mel1c) was investigated using RT-qPCR after 23 days of nocturnal exposure to control (< 0.01 lx) or low ALAN (3 lx). We showed that the relative abundance of most transcripts was low in late afternoon and early evening (06 pm and 08 pm) and increased throughout the night in R. dalmatina. However, a clear and ample nocturnal pattern of target gene expression was not detected in control tadpoles of both species. Surprisingly, a low ALAN level had little influence on the relative expression of most melatonin-related genes. Only Mel1c expression in R. dalmatina and Mel1b expression in B. bufo were affected by ALAN. This target gene approach provides experimental evidence that melatonin signaling pathway was slightly affected by low ALAN level in anuran tadpoles.
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34
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Jolkkonen J, Gaston KJ, Troscianko J. Artificial lighting affects the landscape of fear in a widely distributed shorebird. Commun Biol 2023; 6:131. [PMID: 36721045 PMCID: PMC9889372 DOI: 10.1038/s42003-023-04486-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 01/16/2023] [Indexed: 02/02/2023] Open
Abstract
Fear influences almost all aspects of a prey species' behaviour, such as its foraging and movement, and has the potential to cause trophic cascades. The superior low-light vision of many predators means that perceived predation risk in prey is likely to be affected by light levels. The widespread and increasing intensity of artificial light at night is therefore likely to interfere with this nocturnal visual arms race with unknown behavioural and ecological consequences. Here we test how the fear of predation perceived by wintering Eurasian curlew foraging on tidal flats is influenced by lighting. We quantified flight initiation distance (FID) of individuals under varying levels of natural and artificial illumination. Our results demonstrate that FID is significantly and substantially reduced at low light levels and increases under higher intensity illumination, with artificial light sources having a greater influence than natural sources. Contrary to the sensory-limitation hypothesis, the curlews' unwillingness to take flight in low-light appears to reflect the risks posed by low-light flight, and a desire to remain on valuable foraging grounds. These findings demonstrate how artificial light can shape the landscape of fear, and how this interacts with optimal foraging decisions, and the costs of taking flight.
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Affiliation(s)
- Juho Jolkkonen
- grid.9681.60000 0001 1013 7965Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
| | - Kevin J. Gaston
- grid.8391.30000 0004 1936 8024Environment & Sustainability Institute, University of Exeter, Penryn Campus, Penryn, Cornwall UK
| | - Jolyon Troscianko
- Centre for Ecology & Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall, UK.
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Wolkoff M, Fyie L, Meuti M. Light Pollution Disrupts Seasonal Differences in the Daily Activity and Metabolic Profiles of the Northern House Mosquito, Culex pipiens. INSECTS 2023; 14:64. [PMID: 36661993 PMCID: PMC9865375 DOI: 10.3390/insects14010064] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/28/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
The Northern House mosquito, Culex pipiens, is an important disease vector, and females are capable of surviving the winter in a state of overwintering diapause. This species' diapause response has been extensively studied, and recent evidence suggests that the circadian clock is involved in measuring seasonal changes in daylength to initiate the diapause response. However, differences in the circadian activity of diapausing and non-diapausing Cx. pipiens have not been thoroughly investigated. Additionally, recent findings indicate that artificial light at night (ALAN) can disrupt mosquito diapause, potentially prolonging the mosquito biting season. We compared the circadian locomotor activity of mosquitoes reared in diapause-averting, long-day conditions and diapause-inducing, short-day conditions with and without ALAN to elucidate the interplay between circadian activity, diapause, and light pollution. We also uncovered metabolic differences between mosquitoes reared under diapausing and non-diapausing photoperiods with and without ALAN by measuring the concentration of protein, fructose, glycogen, water-soluble carbohydrates, and lipids. We found that ALAN exposure altered several diapause-associated phenotypes including slightly, but not significantly, increasing activity levels in short day-reared mosquitoes; and preventing some short day-reared mosquitoes from accumulating lipids. ALAN also significantly reduced glycogen and water-soluble carbohydrate levels in long day-reared mosquitoes. Based on our findings, light pollution may decrease insect fitness by perturbing metabolism, and may also impact several phenotypes associated with insect diapause, potentially extending the mosquito biting season and preventing insects in urban environments from overwintering successfully.
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Fogg LG, Cortesi F, Gache C, Lecchini D, Marshall NJ, de Busserolles F. Developing and adult reef fish show rapid light-induced plasticity in their visual system. Mol Ecol 2023; 32:167-181. [PMID: 36261875 PMCID: PMC10099556 DOI: 10.1111/mec.16744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 10/06/2022] [Accepted: 10/17/2022] [Indexed: 12/29/2022]
Abstract
The visual capabilities of fish are optimized for their ecology and light environment over evolutionary time. Similarly, fish vision can adapt to regular changes in light conditions within their lifetime, e.g., ontogenetic or seasonal variation. However, we do not fully understand how vision responds to irregular short-term changes in the light environment, e.g., algal blooms and light pollution. In this study, we investigated the effect of short-term exposure to unnatural light conditions on opsin gene expression and retinal cell densities in juvenile and adult diurnal reef fish (convict surgeonfish; Acanthurus triostegus). Results revealed phenotypic plasticity in the retina across ontogeny, particularly during development. The most substantial differences at both molecular and cellular levels were found under constant dim light, while constant bright light and simulated artificial light at night had a lesser effect. Under dim light, juveniles and adults increased absolute expression of the cone opsin genes, sws2a, rh2c and lws, within a few days and juveniles also decreased densities of cones, inner nuclear layer cells and ganglion cells. These changes potentially enhanced vision under the altered light conditions. Thus, our study suggests that plasticity mainly comes into play when conditions are extremely different to the species' natural light environment, i.e., a diurnal fish in "constant night". Finally, in a rescue experiment on adults, shifts in opsin expression were reverted within 24 h. Overall, our study showed rapid, reversible light-induced changes in the retina of A. triostegus, demonstrating phenotypic plasticity in the visual system of a reef fish throughout life.
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Affiliation(s)
- Lily G Fogg
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Fabio Cortesi
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Camille Gache
- PSL Research University, EPHE-UPVD-CNRS, UAR3278 CRIOBE, Papetoai, French Polynesia.,Laboratoire d'Excellence "CORAIL", Paris, France
| | - David Lecchini
- PSL Research University, EPHE-UPVD-CNRS, UAR3278 CRIOBE, Papetoai, French Polynesia.,Laboratoire d'Excellence "CORAIL", Paris, France
| | - N Justin Marshall
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - Fanny de Busserolles
- Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
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Kehoe R, Sanders D, van Veen FJ. Towards a mechanistic understanding of the effects of artificial light at night on insect populations and communities. CURRENT OPINION IN INSECT SCIENCE 2022; 53:100950. [PMID: 35868610 DOI: 10.1016/j.cois.2022.100950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/04/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Artificial light at night (ALAN) is markedly changing the night-time environment with many studies showing single-species responses. Exposure to ALAN can lead to population declines that should have consequences for the functioning and stability of ecological communities. Here, we summarise current knowledge on how insect communities are affected by ALAN. Based on reported effects of ALAN on the interactions between species, and what has been demonstrated for similar effects in other contexts, we argue that direct effects of ALAN on a few species can potentially propagate through the network of species interactions to have widespread effects in ecological communities. This can lead to a shift in community structure and simplified communities. We discuss the diversity of ALAN as a pressure and highlight major gaps in the research field. In particular, we conclude that landscape level impacts on populations and communities are understudied.
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Affiliation(s)
- Rachel Kehoe
- Environment and Sustainability Institute, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, United Kingdom
| | - Dirk Sanders
- Environment and Sustainability Institute, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, United Kingdom
| | - Frank Jf van Veen
- Centre for Ecology & Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, United Kingdom.
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Cox DTC, Sánchez de Miguel A, Bennie J, Dzurjak SA, Gaston KJ. Majority of artificially lit Earth surface associated with the non-urban population. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 841:156782. [PMID: 35724779 DOI: 10.1016/j.scitotenv.2022.156782] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 06/14/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Key to understanding the negative impacts of artificial light at night (ALAN) on human health and the natural environment is its relationship with human density. ALAN has often primarily been considered an urban issue, however although over half of the population is urbanized, the 46 % that are not inhabit a dispersed array of smaller settlements. Here, we determine the global relationships between two dimensions of ALAN, namely direct emissions (radiance) and skyglow, and human density, and how these relationships vary across continents. We correct the Visible Infrared Imaging Radiometer Suite Day/Night Band (VIIRS DNB) product for albedo, skyglow, airglow, the aurora and permanent snow and ice to represent upward radiance overland at 1.61 ∗ 2.12 km resolution from artificial sources only. For skyglow we use the World Atlas of Artificial Sky Brightness. Globally (between 59°N and 55°S), direct emissions were detected over 26.5 % and skyglow over 46.9 % of land area. Over half of all cumulative direct emissions (54.9 %) were emitted at low levels by the non-urban population, whilst these populations experienced the negative impacts of over two-thirds of all cumulative skyglow (69.8 %). This emphasises the extent of ALAN outside of urban areas, and its similarity in this regard to a number of other forms of pollution. Although powerful sources of rural direct emissions (e.g., industry, recreation) are important contributors of light pollution, cumulatively they only contributed 10 % to total direct emissions. The relationship between each dimension of ALAN and population density varied across continents, driven by powerful rural emissions, non-urban populations and urban design. These relationships reflect the unique socio-economic and geographical make-up of each region and inform on where best to target light pollution mitigation strategies, not only in urban areas but also in rural ones.
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Affiliation(s)
- D T C Cox
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK.
| | - A Sánchez de Miguel
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK; Departamento de Física de la Tierra y Astrofísica, Instituto de Física de Partículas y del Cosmos (IPARCOS), Universidad Complutense, Madrid, Spain
| | - J Bennie
- Peter Lanyon Building, University of Exeter, Penryn, Cornwall TR10 9FE, UK
| | - S A Dzurjak
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK
| | - K J Gaston
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK
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Owens ACS, Van den Broeck M, De Cock R, Lewis SM. Behavioral responses of bioluminescent fireflies to artificial light at night. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.946640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Bioluminescent insects have been the subject of scientific interest and popular wonder for millennia. But in the 21st century, the fireflies, click beetles, and cave glow-worms that brighten our nights are threatened by an unprecedented competitor: anthropogenic light pollution. Artificial lights can obscure the light-based signals on which these and other bioluminescent organisms rely to court mates, deter predators, and attract prey. In the following review we summarize a recent influx of research into the behavioral consequences of artificial light at night for firefly beetles (Coleoptera: Lampyridae), which we organize into four distinct courtship signaling systems. We conclude by highlighting several opportunities for further research to advance this emerging field and by offering a set of up-to-date lighting recommendations that can help land managers and other stakeholders balance public safety and ecological sustainability.
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Levy K, Fishman B, Barnea A, Ayali A, Tauber E. Transcriptional Response of Circadian Clock Genes to an ‘Artificial Light at Night’ Pulse in the Cricket Gryllus bimaculatus. Int J Mol Sci 2022; 23:ijms231911358. [PMID: 36232659 PMCID: PMC9570371 DOI: 10.3390/ijms231911358] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/22/2022] [Accepted: 09/22/2022] [Indexed: 11/17/2022] Open
Abstract
Light is the major signal entraining the circadian clock that regulates physiological and behavioral rhythms in most organisms, including insects. Artificial light at night (ALAN) disrupts the natural light–dark cycle and negatively impacts animals at various levels. We simulated ALAN using dim light stimuli and tested their impact on gene expression in the cricket Gryllus bimaculatus, a model of insect physiology and chronobiology. At night, adult light–dark-regime-raised crickets were exposed for 30 min to a light pulse of 2–40 lx. The relative expression of five circadian-clock-associated genes was compared using qPCR. A dim ALAN pulse elicited tissue-dependent differential expression in some of these genes. The strongest effect was observed in the brain and in the optic lobe, the cricket’s circadian pacemaker. The expression of opsin-Long Wave (opLW) was upregulated, as well as cryptochrome1-2 (cry) and period (per). Our findings demonstrate that even a dim ALAN exposure may affect insects at the molecular level, underscoring the impact of ALAN on the circadian clock system.
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Affiliation(s)
- Keren Levy
- School of Zoology, Tel Aviv University, Tel-Aviv 6997801, Israel
| | - Bettina Fishman
- Department of Evolutionary and Environmental Biology, Institute of Evolution, University of Haifa, Haifa 3498838, Israel
| | - Anat Barnea
- Department of Natural and Life Sciences, The Open University of Israel, Raanana 4353701, Israel
| | - Amir Ayali
- School of Zoology, Tel Aviv University, Tel-Aviv 6997801, Israel
- Sagol School of Neuroscience, Tel Aviv University, Tel-Aviv 6997801, Israel
- Correspondence: (A.A.); (E.T.)
| | - Eran Tauber
- Department of Evolutionary and Environmental Biology, Institute of Evolution, University of Haifa, Haifa 3498838, Israel
- Correspondence: (A.A.); (E.T.)
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Shidemantle G, Blackwood J, Horn K, Velasquez I, Ronan E, Reinke B, Hua J. The morphological effects of artificial light at night on amphibian predators and prey are masked at the community level. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 308:119604. [PMID: 35691446 DOI: 10.1016/j.envpol.2022.119604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 06/06/2022] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
Artificial light at night (ALAN) is a pervasive pollutant that influences wildlife at both the individual and community level. In this study, we tested the individual-level effects of ALAN on three species of tadpole prey and their newt predators by measuring prey pigmentation and predator and prey mass. Then we evaluated whether the individual-level effects of ALAN on pigmentation and mass had cascading community-level effects by assessing the outcome of predator-prey interactions. We found that spring peepers exposed to ALAN were significantly darker than those reared under control conditions. Additionally, wood frogs reared in ALAN conditions were significantly smaller than those reared in control conditions. In contrast, Eastern newts collected earlier in the spring that were exposed to ALAN were significantly larger than controls while those collected later in the spring were not affected by ALAN, suggesting phenological differences in the effect of ALAN. To understand how changes in pigmentation and size due to ALAN influence predation rates, we ran predation assays in both ALAN-polluted and ALAN-free outdoor environments. After the predation assay, the size disparity in wood frogs reared in ALAN was eliminated such that there was no longer a treatment difference in wood frog size, likely due to size-selective predation. This demonstrates the beneficial nature of predators' selective pressure on prey populations. Lastly, despite individual-level effects of ALAN on pigmentation and mass, we did not detect cascading community-level effects on predation rates. Overall, this study highlights important species-level distinctions in the effects of ALAN. It also emphasizes the need to incorporate ecological complexity to understand the net impact of ALAN.
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Affiliation(s)
| | - Jurnee Blackwood
- Binghamton University, 4400 Vestal Pkway East, Binghamton, NY, 13902, USA
| | - Kelsey Horn
- Binghamton University, 4400 Vestal Pkway East, Binghamton, NY, 13902, USA
| | - Isabela Velasquez
- Binghamton University, 4400 Vestal Pkway East, Binghamton, NY, 13902, USA
| | - Emily Ronan
- Binghamton University, 4400 Vestal Pkway East, Binghamton, NY, 13902, USA
| | - Beth Reinke
- Northeastern Illinois University, 5500 N St Louis Ave, Chicago, IL, 60625, USA
| | - Jessica Hua
- Binghamton University, 4400 Vestal Pkway East, Binghamton, NY, 13902, USA
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Berry S. The Use of Optical Coherence Tomography to Demonstrate Dark and Light Adaptation in a Live Moth. ENVIRONMENTAL ENTOMOLOGY 2022; 51:643-648. [PMID: 35762335 PMCID: PMC9389422 DOI: 10.1093/ee/nvac044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Indexed: 06/15/2023]
Abstract
To work effectively, the eyes of nocturnal insects have a problem they must overcome. During the night, the light levels are low, so their eyes need to be very sensitive; but they also need a way of adapting to environmental light conditions, and protecting those sensitive organs, if a bright light is encountered. Human eyes have a pupil that changes size to regulate light input to the eye. Moths (Lepidoptera) use a light absorbing pigment that moves position to limit the light within the eye. This pigment migration is difficult to record because it is a dynamic process and will only occur in a live moth. This paper presents the first use of Ocular Coherence Tomography as a method of viewing anatomical detail in a compound eye. This is noninvasive and does not harm the insect. To demonstrate the effectiveness, this article documents the dynamic process of light adaptation within a moth's eye.
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43
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Owens ACS, Lewis SM. Artificial light impacts the mate success of female fireflies. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220468. [PMID: 35958085 DOI: 10.6084/m9.figshare.c.6125244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/18/2022] [Indexed: 05/23/2023]
Abstract
Anthropogenic light pollution is a novel environmental disruption that affects the movement, foraging and mating behaviour of nocturnal animals. Most of these effects are sublethal, and their net impact on reproductive fitness and population persistence is often extrapolated from behavioural data. Without dedicated tracking of wild individuals, however, it is impossible to predict whether populations in light-polluted habitats will decline or, instead, move to shaded refuges. To disentangle these conflicting possibilities, we investigated how artificial light affects mating and movement in North American Photinus, a genus of bioluminescent fireflies known to experience courtship failure under artificial light. The degree to which artificial light reduced mate success depended on the intensity of the light treatment, its environmental context, and the temporal niche of the species in question. In the laboratory, direct exposure to artificial light completely prevented mating in semi-nocturnal Photinus obscurellus. In the field, artificial light had little impact on the movement or mate success of local Photinus pyralis and Photinus marginellus but strongly influenced mate location in Photinus greeni; all three species are relatively crepuscular. Our nuanced results suggest greater appreciation of behavioural diversity will help insect conservationists and dark sky advocates better target efforts to protect at-risk species.
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Affiliation(s)
- Avalon C S Owens
- Department of Biology, Tufts University, Medford, MA 02155-5801, USA
| | - Sara M Lewis
- Department of Biology, Tufts University, Medford, MA 02155-5801, USA
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Owens ACS, Lewis SM. Artificial light impacts the mate success of female fireflies. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220468. [PMID: 35958085 PMCID: PMC9364009 DOI: 10.1098/rsos.220468] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/18/2022] [Indexed: 05/07/2023]
Abstract
Anthropogenic light pollution is a novel environmental disruption that affects the movement, foraging and mating behaviour of nocturnal animals. Most of these effects are sublethal, and their net impact on reproductive fitness and population persistence is often extrapolated from behavioural data. Without dedicated tracking of wild individuals, however, it is impossible to predict whether populations in light-polluted habitats will decline or, instead, move to shaded refuges. To disentangle these conflicting possibilities, we investigated how artificial light affects mating and movement in North American Photinus, a genus of bioluminescent fireflies known to experience courtship failure under artificial light. The degree to which artificial light reduced mate success depended on the intensity of the light treatment, its environmental context, and the temporal niche of the species in question. In the laboratory, direct exposure to artificial light completely prevented mating in semi-nocturnal Photinus obscurellus. In the field, artificial light had little impact on the movement or mate success of local Photinus pyralis and Photinus marginellus but strongly influenced mate location in Photinus greeni; all three species are relatively crepuscular. Our nuanced results suggest greater appreciation of behavioural diversity will help insect conservationists and dark sky advocates better target efforts to protect at-risk species.
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Affiliation(s)
| | - Sara M. Lewis
- Department of Biology, Tufts University, Medford, MA 02155-5801, USA
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Mayer-Pinto M, Jones TM, Swearer SE, Robert KA, Bolton D, Aulsebrook AE, Dafforn KA, Dickerson AL, Dimovski AM, Hubbard N, McLay LK, Pendoley K, Poore AG, Thums M, Willmott NJ, Yokochi K, Fobert EK. Light pollution: a landscape-scale issue requiring cross-realm consideration. UCL OPEN ENVIRONMENT 2022; 4:e036. [PMID: 37228454 PMCID: PMC10171420 DOI: 10.14324/111.444/ucloe.000036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 05/23/2022] [Indexed: 05/27/2023]
Abstract
Terrestrial, marine and freshwater realms are inherently linked through ecological, biogeochemical and/or physical processes. An understanding of these connections is critical to optimise management strategies and ensure the ongoing resilience of ecosystems. Artificial light at night (ALAN) is a global stressor that can profoundly affect a wide range of organisms and habitats and impact multiple realms. Despite this, current management practices for light pollution rarely consider connectivity between realms. Here we discuss the ways in which ALAN can have cross-realm impacts and provide case studies for each example discussed. We identified three main ways in which ALAN can affect two or more realms: 1) impacts on species that have life cycles and/or stages in two or more realms, such as diadromous fish that cross realms during ontogenetic migrations and many terrestrial insects that have juvenile phases of the life cycle in aquatic realms; 2) impacts on species interactions that occur across realm boundaries, and 3) impacts on transition zones or ecosystems such as mangroves and estuaries. We then propose a framework for cross-realm management of light pollution and discuss current challenges and potential solutions to increase the uptake of a cross-realm approach for ALAN management. We argue that the strengthening and formalisation of professional networks that involve academics, lighting practitioners, environmental managers and regulators that work in multiple realms is essential to provide an integrated approach to light pollution. Networks that have a strong multi-realm and multi-disciplinary focus are important as they enable a holistic understanding of issues related to ALAN.
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Affiliation(s)
- Mariana Mayer-Pinto
- Centre for Marine Science and Innovation, Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, NSW 2052, Australia
| | - Theresa M. Jones
- School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia
| | - Stephen E. Swearer
- National Centre for Coasts and Climate (NCCC), School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia
| | - Kylie A. Robert
- Research Centre for Future Landscapes, School of Agriculture, Biomedicine and Environment, La Trobe University, VIC 3086, Australia
| | - Damon Bolton
- Centre for Marine Science and Innovation, Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, NSW 2052, Australia
| | - Anne E. Aulsebrook
- School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen 82319, Germany
| | - Katherine A. Dafforn
- School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia
| | - Ashton L. Dickerson
- School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia
| | - Alicia M. Dimovski
- Research Centre for Future Landscapes, School of Agriculture, Biomedicine and Environment, La Trobe University, VIC 3086, Australia
| | - Niki Hubbard
- Centre for Marine Science and Innovation, Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, NSW 2052, Australia
| | - Lucy K. McLay
- Agriculture Victoria Research, Bundoora, VIC 3083, Australia
| | - Kellie Pendoley
- Pendoley Environmental Pty Ltd, 12A Pitt Way, Booragoon, WA 6154, Australia
| | - Alistair G.B. Poore
- Centre for Marine Science and Innovation, Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, NSW 2052, Australia
| | - Michele Thums
- Australian Institute of Marine Science, Indian Ocean Marine Research Centre, University of Western Australia, Crawley, WA 6009, Australia
| | - Nikolas J. Willmott
- School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia
| | - Kaori Yokochi
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Burwood, VIC 3125, Australia
| | - Emily K. Fobert
- School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
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Xie M, Zhong Y, Lin L, Zhang G, Su W, Ni W, Qu M, Chen H. Transcriptome analysis of Holotrichia oblita reveals differentially expressed unigenes related to reproduction and development under different photoperiods. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2022; 42:100959. [PMID: 35033741 DOI: 10.1016/j.cbd.2022.100959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/19/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Holotrichia oblita (Faldermann) (Coleoptera: Scarabaeidae) is an insect whose feeding and mating behaviors occur at night. A scotophase is necessary for H. oblita reproduction. We used RNA sequencing (RNA-seq) to compare the expression patterns of H. oblita at five photoperiods (0:24, 8:16, 12:12, 16:8, and 24:0 h) (L:D). Compared to the control (24:0) (L:D), 161-684 differentially expressed unigenes (DEUs) were found in female samples, while 698-2322 DEUs were found in male samples. For all DEUs, a total of 92-1143 DEUs were allocated to 116-662 categories of gene ontology (GO), and 81-1116 DEUs were assigned into 77-286 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways. The iPath diagram showed that the DEUs generated by comparing female and male samples with photoperiods of 0:24 and 24:0, respectively, involved multiple metabolic pathways, such as carbohydrate metabolism, lipid metabolism, nucleotide metabolism, purine metabolism and glutathione metabolism. Most of these DEUs were upregulated. Finally, 13 DEUs related to reproduction and development were selected to confirm the consistency of relative expression between RNA-Seq and quantitative real-time polymerase chain reaction (qRT-PCR). Most of these comparison results agreed well, except for some qRT-PCR results that were not detected in male samples due to their low expression. These results provide useful information for understanding the dark-induced reproduction of H. oblita.
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Affiliation(s)
- Minghui Xie
- Anhui-CABI Joint laboratory for Agricultural Pest Control, Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Yongzhi Zhong
- Anhui-CABI Joint laboratory for Agricultural Pest Control, Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Lulu Lin
- Anhui-CABI Joint laboratory for Agricultural Pest Control, Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Guangling Zhang
- Anhui-CABI Joint laboratory for Agricultural Pest Control, Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Weihua Su
- Anhui-CABI Joint laboratory for Agricultural Pest Control, Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - WanLi Ni
- Crop Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
| | - Mingjing Qu
- Shandong Peanut Research Institute, Qingdao 266100, China.
| | - Haoliang Chen
- Anhui-CABI Joint laboratory for Agricultural Pest Control, Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
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Owens ACS, Dressler CT, Lewis SM. Costs and benefits of "insect friendly" artificial lights are taxon specific. Oecologia 2022; 199:487-497. [PMID: 35650413 DOI: 10.1007/s00442-022-05189-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 05/17/2022] [Indexed: 01/13/2023]
Abstract
The expansion of human activity into natural habitats often results in the introduction of artificial light at night, which can disrupt local ecosystems. Recent advances in LED technology have enabled spectral tuning of artificial light sources, which could in theory limit their impact on vulnerable taxa. To date, however, experimental comparisons of ecologically friendly candidate colors have often considered only one type of behavioral impact, sometimes on only single species. Resulting recommendations cannot be broadly implemented if their consequences for other local taxa are unknown. Working at a popular firefly ecotourism site, we exposed the insect community to artificial illumination of three colors (blue, broad-spectrum amber, red) and measured flight-to-light behavior as well as the courtship flash behavior of male Photinus carolinus fireflies. Firefly courtship activity was greatest under blue and red lights, while the most flying insects were attracted to blue and broad-spectrum amber lights. Thus, while impacts of spectrally tuned artificial light varied across taxa, our results suggest that red light, rather than amber light, is least disruptive to insects overall, and therefore more generally insect friendly.
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Affiliation(s)
- Avalon C S Owens
- Department of Biology, Tufts University, 200 College Avenue, Medford, MA, 02155, USA.
| | - Caroline T Dressler
- Department of Biology, Tufts University, 200 College Avenue, Medford, MA, 02155, USA.,Department of Ecology, Evolution, and Organismal Biology, Brown University, 80 Waterman Street, Providence, RI, 02912, USA
| | - Sara M Lewis
- Department of Biology, Tufts University, 200 College Avenue, Medford, MA, 02155, USA
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Parlin AF, Stratton SM, Guerra PA. Oriented migratory flight at night: Consequences of nighttime light pollution for monarch butterflies. iScience 2022; 25:104310. [PMID: 35573206 PMCID: PMC9097705 DOI: 10.1016/j.isci.2022.104310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 02/23/2022] [Accepted: 04/22/2022] [Indexed: 11/19/2022] Open
Abstract
We show that light trespass—a form of nighttime light pollution (NLP)—elicits normal daytime clock-mediated migratory behavior in fall monarch butterflies during their night-cycle. In controlled indoor flight simulator studies isolating the role of NLP on the expression of oriented migratory flight using a time-compensated sun compass,a full-spectrum light source consistent with lights used outdoors at night by the public,triggered proper fall directional flight at night in monarchs. Monarchs remained quiescent when initially placed in the flight simulator in the dark, but flight was immediately triggered when our light source was turned on. This nighttime behavior was identical to that seen in outdoor free-flying fall conspecifics during the day. The light source provided directional cues equivalent to those provided by the sun and could either phase-advance or phase-delay monarchs. Our study highlights the negative consequences of NLP on diurnal animals, especially those that rely on clock-mediated behavior. Nighttime light pollution can disturb diurnal migratory monarch butterflies Exposure to this pollution induces abnormal activity in normally quiescent monarchs This pollution acts as sensory noise that perturbs the circadian clock of monarchs Conservation should consider susceptibility of habitat to nighttime light pollution
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Affiliation(s)
- Adam F. Parlin
- Department of Biological Sciences, University of Cincinnati, Rieveschl Hall, 318 College Drive, Cincinnati, OH 45221, USA
| | - Samuel M. Stratton
- Department of Biological Sciences, University of Cincinnati, Rieveschl Hall, 318 College Drive, Cincinnati, OH 45221, USA
- Department of Ecology and Evolutionary Biology, University of Michigan, Biological Sciences Building, 1105 N University Avenue, Ann Arbor, MI 48109, USA
| | - Patrick A. Guerra
- Department of Biological Sciences, University of Cincinnati, Rieveschl Hall, 318 College Drive, Cincinnati, OH 45221, USA
- Corresponding author
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Dickerson AL, Hall ML, Jones TM. The effect of natural and artificial light at night on nocturnal song in the diurnal willie wagtail. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:151986. [PMID: 34843784 DOI: 10.1016/j.scitotenv.2021.151986] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/22/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Artificial light at night (ALAN) has rapidly and drastically changed the global nocturnal environment. Evidence for the effect of ALAN on animal behaviour is mounting and animals are exposed to both point sources of light (street and other surrounding light sources) and broadscale illuminance in the form of skyglow. Research has typically taken a simplified approach to assessing the presence of ALAN, yet to fully understand the ecological impact requires consideration of the different scales and sources of light concurrently. Bird song has previously been well studied for its relationship with light, offering an opportunity to examine the relative impact of different sources of light on behaviour. In this study, we combine correlational and experimental approaches to examine how light at night affects the nocturnal song behaviour of the largely diurnal willie wagtail (Rhipidura leucophrys). Observations of willie wagtails across urban and rural locations in southeastern Australia demonstrated that nocturnal song behaviour increased with the intensity of moonlight in darker rural areas but decreased in areas with high sky glow. In addition, willie wagtails were half as likely to sing at night in the presence of localized light sources such as streetlights in urban and rural areas. Experimental introduction of streetlights to a previously dark area confirmed this relationship: willie wagtail song rates declined when lights were turned on and returned to their original rates following streetlight removal. Our findings show that scale, as well as intensity, are important when considering the impact of light at night as moonlight, sky glow, and localized sources of artificial light have different effects on nocturnal song behaviour.
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Affiliation(s)
- Ashton L Dickerson
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Michelle L Hall
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia; Bush Heritage Australia, 395 Collins Street, Melbourne, Vic 3000, Australia; School of Biological Sciences, University of Western Australia, Crawley, WA 6009, Australia
| | - Therésa M Jones
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia
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Li D, Huang J, Zhou Q, Gu L, Sun Y, Zhang L, Yang Z. Artificial Light Pollution with Different Wavelengths at Night Interferes with Development, Reproduction, and Antipredator Defenses of Daphnia magna. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:1702-1712. [PMID: 35014268 DOI: 10.1021/acs.est.1c06286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Artificial light at night (ALAN) dramatically alters the natural daily cycle of light and may cause a suite of physiological and behavioral responses of freshwater crustacean Daphnia. Here, we conducted a life table experiment to investigate the effect of different wavelengths [white (L-L, 400-800 nm), red (R, 614 nm), green (G, 527 nm), and blue (B, 447 nm)] and flashing modes [three colors flash alternately (3-Flash), seven colors strobe alternately (7-Strobe)] of ALAN on the development, reproduction, and predator-induced defenses of Daphnia magna. The results showed that G inhibited the development of the body and tail spine of Daphnia at sexual maturity and decreased their reproduction. The 7-Strobe promoted Daphnia to develop a larger eye. There was an interaction between fish kairomones and ALAN, which intensified over time. ALAN enhanced the response of the relative tail spine length to fish kairomone at sexual maturity. In addition, L-L and R inhibited the body length of 10th instar D. magna in response to fish kairomone. Through the hierarchical cluster method, the 3-Flash and B are recommended as friendly artificial lighting to Daphnia. Our results highlight the interference effects of ALAN on Daphnia, which are helpful to assess the potential impact of light pollution on zooplankton.
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Affiliation(s)
- Da Li
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Jing Huang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Qiming Zhou
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Lei Gu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Yunfei Sun
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Lu Zhang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Zhou Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, Jiangsu 210023, China
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