Low impact of two LED colors on nocturnal insect abundance and bat activity in a peri-urban environment

Bolliger, Janine; Hennet, Tom; Wermelinger, Beat; Blum, Stephan; Haller, Jörg; Obrist, Martin К.

doi:10.1007/s10841-020-00235-1

Cited by 25 publications

(20 citation statements)

References 46 publications

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“…(2016) and Bolliger et al . (2020) found no significant differences in this case, while van Grunsven et al . (2020) also reported no long‐term differentiation of moth declines according to different wavelengths.…”

Section: Practical Implicationscontrasting

confidence: 48%

Moths are strongly attracted to ultraviolet and blue radiation

Brehm

NIERMANN

Nino

et al. 2021

Insect Conserv Diversity

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We carried out three choice experiments with 6116 nocturnal lepidopteran individuals (95 species, 7 families, 32 075 counts), each replicated 105 times during the seasons of 2 years. Moths were released indoors at the centre of a 10 × 10 m area with different lamps placed at each corner. In experiment 1, lamps emitted ultraviolet (UV) (peak at 365 nm), blue (450 nm), green (520 nm) or cool white (450 and 520 nm) radiation. In experiment 2, UV was replaced by red (640 nm). In experiment 3, we used UV and three mixed radiation lamps of different emission intensities (365–520 nm). We applied a linear mixed effect model to test for differences in attraction to the light sources. Among all counts, 12.2% (males) and 9.2% (females) were attracted to a lamp. Among the lamp counts, 84% were made at the UV lamp in experiment 1. In experiment 2, 63% of the counts were made at the blue lamp. In experiment 3, most counts were made at the strongest mixed radiation lamp (31%), and the UV lamp (28%). Patterns were generally similar across Lepidopteran families, and for both sexes. Moths are clearly preferentially attracted to short‐wave radiation. Even small quantities of UV radiation, emitted, for example, by metal halide lamps and certain mercury vapour tubes, will disproportionately contribute to light pollution. Since blue light also attracts moths strongly, lamps with a low proportion of blue light should be given priority in lighting planning.

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Section: Practical Implicationscontrasting

confidence: 48%

Moths are strongly attracted to ultraviolet and blue radiation

Brehm

NIERMANN

Nino

et al. 2021

Insect Conserv Diversity

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“…Nocturnal insects are highly sensitive to light and their behavioral responses like dispersal, foraging, defense against predation, location of food, hosts, oviposition sites, resting sites and mate searching are governed by vision [17][18][19][20][21][22][23][24][25]. These behavioral responses of insects are very much related with light intensity (adaptation), circadian periodicity and photoperiodism [20,24].…”

Section: Discussionmentioning

confidence: 99%

“…Nocturnal behavior of insects, their growth and physiology can be disrupted by the use of artificial light at night (ALAN) [ 23 , 24 ]. However, the reason for this phototactic behavior, especially for ALAN in nocturnal insects remains unclear and may be driven by multiple factors [ 18 , 20 , 26 ]. The effects of environmental (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…The current study confirmed our hypothesis that sky quality and artificial light intensity influences composition and abundance of the insects. Phototactic behavior of insects is also affected by sky quality, light quality and external shape of light source [ 17 , 18 , 21 , 31 ]. Species diversity and abundance of insects caught by light traps can change according to the light source, for example, LED bulb, compact fluorescent bulb or incandescent bulb [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

“…In rural area sky was clear and light intensity from artificial sources was lower than urban areas. This phenomenon proved good for insect diversity and populations [ 17 , 18 , 21 ]. Indeed, natural areas with low-level of artificial light are valuable to maintain healthy ecosystem and balanced insect diversity.…”

Section: Discussionmentioning

confidence: 99%

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Impact of artificial light intensity on nocturnal insect diversity in urban and rural areas of the Asir province, Saudi Arabia

Hakami¹,

Khan²,

Ghramh³

et al. 2020

PLoS ONE

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Continuous urban developments have resulted in increased demand for street furniture, one of which is street light columns. Artificial light at night (ALAN) pose significant impacts on insect diversity in urban and rural areas. The ALAN is a significant driver of decline in insect diversity. This study evaluated the impact of light intensity and sky quality at night on insect diversity in rural and urban areas of the Asir province, Saudi Arabia. Insect traps were installed in both areas during night. Light intensity of nearby road lamps was measured using light meter, while sky quality was measured using sky quality meter. Rural areas exhibited low light intensity (10.33 flux/f.candle) and good sky quality (18.80 magnitude/arcsec2). Urban areas exhibited intense light (89.33 flux/f.candle) and poor sky quality (15.49 magnitude/arcsec2). Higher insect diversity was recorded for rural areas where insects belonging to seven orders (i.e., Diptera, Lepidoptera, Hemiptera, Hymenoptera, Coleoptera, Neuroptera, and Dermaptera) were collected. However, insects of four orders (i.e., Diptera, Lepidoptera, Hemiptera, and Neuroptera) were found in urban areas indicating low diversity. Lepidopteran insects were frequently recorded from rural areas indicating they are attracted to artificial light. It is concluded that excessive ALAN and poor sky quality at night disrupt insect biodiversity. Therefore, ALAN and sky quality must be considered responsible for decline in insect biodiversity along with other known factors.

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Trade‐offs in habitat use and occupancy of bats across the gradient of urbanization and seasons

Dwyer,

Moore,

Lewis

2024

Ecosphere

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Urbanization that occurs across a gradient from low‐ to high‐density development, is a primary driver of landscape change that can affect biodiversity. Animals balance trade‐offs in obtaining resources and avoiding anthropogenic disturbances across the gradient of urbanization to maximize their fitness. However, additional research is necessary to understand seasonal variations in how animals respond to urbanization, particularly in arid regions, where resource availability shifts drastically across seasons. Our objective was to evaluate the response of a suite of bat species to urbanization and whether species shift their response to urbanization across seasons. We predicted that the response of bats to urbanization would differ among species, with some species being more sensitive to urbanization than others. We also predicted that bat species would increase the use of moderate and highly urbanized areas in the summer season where food and water resources were assumed to be greater compared with wildland areas. To evaluate these predictions, we used a stratified random sampling design to sample 50 sites with stationary acoustic bat monitors across the gradient of urbanization in the Phoenix metropolitan area, Arizona, USA during four seasons. We identified a total of 14 bat species during 1000 survey nights. Consistent with predictions, bat species exhibited different responses to urbanization, with most species exhibiting a negative relationship with urbanization, and some species exhibiting a quadratic or positive relationship with urbanization. Counter to predictions, most species did not appear to shift their response to urbanization across seasons. Consistent with predictions, plant productivity and water were important for some species in the summer season. Differences in the response of bat species to urbanization was likely related to species traits (e.g., wing morphology and echolocation call characteristics) and behavioral strategies that influence a species' sensitivity to anthropogenic disturbances and ability to access available resources in urbanized areas. Ultimately, to promote the management and conservation of bats, it is likely important to maintain resources in urbanized areas for bats that are more tolerant of urbanization and to conserve areas of undeveloped high‐quality habitat with low anthropogenic disturbance in wildland areas for bats that are sensitive to urbanization.

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Low impact of two LED colors on nocturnal insect abundance and bat activity in a peri-urban environment

Cited by 25 publications

References 46 publications

Moths are strongly attracted to ultraviolet and blue radiation

Moths are strongly attracted to ultraviolet and blue radiation

Impact of artificial light intensity on nocturnal insect diversity in urban and rural areas of the Asir province, Saudi Arabia

Trade‐offs in habitat use and occupancy of bats across the gradient of urbanization and seasons

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