National Park visitors perceive benefits for themselves and wildlife under blended red-white outdoor lighting

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Sept. 18, 2024

Abstract Visitors to Colter Bay Village in Grand Teton National Park were surveyed elicit their evaluations of experimental outdoor lighting conditions. Luminaires capable dimming and switching between two LED modules (white, blended red-white) installed street parking areas. The red-white lamps consisted 30 narrowband with a peak wavelength 623 nm 3000 K white LEDs. Similar “red” previously shown reduce impacts bats insects. red closely matched for luminance. Measured horizontal illuminance at survey locations had an interquartile range from 0.63 3.82 lx. produced lower perceived brightness ( V B 2 λ )), even after reflection off asphalt, yet participants expressed higher ratings visual comfort safety under lighting. Surveys conducted earlier the evening, levels predicted solar measured illuminance, rated on safety, though these correlations not as strong effect lamp color. Streetlight support that protected natural resources contingent upon age or gender. Survey assessed more protective environment. These results demonstrate designed ecological can yield superior nocturnal experience pedestrians.

Language: Английский

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Antagonistic Effects of Light Pollution and Warming on Habitat‐Forming Seaweeds

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(10)

Published: Oct. 1, 2024

Artificial Light at Night (ALAN) is an emerging global stressor that likely to interact with other stressors such as warming, affecting habitat-forming species and ecological functions. Seaweeds are dominant in temperate marine ecosystems, where they support primary productivity diverse communities. Warming a major seaweed forests, but effects of ALAN on seaweeds largely unknown. We manipulated (0 lx vs. 25 night) temperature (ambient +1.54°C warming) test their independent interactive the survival, growth (biomass, total-, blade- stipe-length) function (photosynthesis, respiration) juveniles two seaweeds, kelp

Language: Английский

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СВЕТОВОЕ АНТРОПОГЕННОЕ ЗАГРЯЗНЕНИЕ: ДЕЙСТВИЕ НА НАСЕКОМЫХ

Биосфера, Journal Year: 2022, Volume and Issue: 14(2), P. 11 - 11

Published: June 20, 2022

The amounts and diversity of insects make them significant contributors to ecosystems stability. Human activities are associated with rapid changes in the lighting conditions ecosystems. These produce diverse alterations behavior, physiology and, ultimately, population sizes insects. present review addresses that occurre upon anthropogenic light pollution. active nighttime subject direct negative impacts at night primarily because it shortens foraging proliferation periods thus diminishes insect populations, whereas daytime species may benefit somehow due lengthening their activity. physiological state allows survive during winter, diapause, critically depends on duration; therefore, longer illumination result a delayed or incomplete diapause both Migratory focal sources, such interfere migration routes lead massive losses Indirect pollution cases use polarizing materials, as asphalts pavements polymeric films, which distort insects’ abilities polarization for detecting water surfaces. Although almost ubiquitous is relatively recent phenomenon, some have already developed adaptations it. However, impact still poorly studied not only enormous but also rapidly changing characteristics artificial luminosity spectra. Proper choices parameters ameliorate help develop means control pests synanthropic

Language: Английский

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More Light Please: Daphnia Benefit From Light Pollution by Increased Tolerance Toward Cyanobacterial Chymotrypsin Inhibitors

Frontiers in Ecology and Evolution, Journal Year: 2022, Volume and Issue: 10

Published: Feb. 14, 2022

Cryptochromes are evolutionary ancient blue-light photoreceptors that part of the circadian clock in nervous system many organisms. transfer information predominant light regime to which results fast adjustment photoperiod. Therefore, is sensitive changes and can be affected by anthropogenic Artificial Light At Night (ALAN). This turn has consequences for associated behavioral processes, e.g., diel vertical migration (DVM) zooplankton. In freshwater ecosystems, zooplankton genus Daphnia performs DVM order escape optically hunting predators avoid UV light. Concomitantly, experience food-supply during DVM. play keystone role carbon-transfer next trophic level. whole ecosystem occurrence cyanobacteria blooms as reduce food quality due their production digestive inhibitors (e.g., protease inhibitors). other organisms, digestion linked clock. If this also case , expression genes should show a rhythmic following cryptochrome 2 ). We tested hypothesis demonstrated gene proteases was ALAN. Contrary our expectations, activity one type (chymotrypsins) increased indicates higher might improve diet utilization. we treated D. magna with chymotrypsin-inhibitor producing cyanobacterium found ALAN actually led an increase ’s growth rate comparison on same control conditions. conclude tolerance putatively enables populations better cyanobacterial produce chymotrypsin Anthropocene, defined pollution eutrophication.

Language: Английский

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Photoperiodic adaptation of aanat and clock gene expression in seasonal populations of Daphnia pulex

Chronobiology International, Journal Year: 2023, Volume and Issue: 40(5), P. 635 - 643

Published: March 30, 2023

Changes in day-length entrain the endogenous clock of organisms leading to complex responses photoperiod. In long-lived experiencing several seasons this response photoperiod is phenotypically plastic. However, short-lived often experience a single season without pronounced changes day-length. For those, plastic different would not necessarily be adaptive. aquatic ecosystems, zooplankton species like Daphnia live only for some weeks, i.e. one week up ca. two months. they show succession clones that are seasonally adapted environmental changes. Here, we found 16 per each three ( = 48 clones) from same pond and year differed gene expression with homogenous pattern ephippia-hatched spring bimodal summer autumn populations indicating an ongoing adaptation process. We clearly demonstrate were short, long Furthermore, melatonin-synthesis enzyme AANAT was always lowest clones. Anthropocene, Daphnia's might disturbed by light-pollution global warming. Since key-organism trophic carbon transfer, disruption its rhythm devastating stability freshwater ecosystems. Our results important step understanding

Language: Английский

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