A clashing colour combination with deadly consequences DOI Open Access
Giulia S. Rossi

Journal of Experimental Biology, Journal Year: 2023, Volume and Issue: 226(17)

Published: Aug. 29, 2023

Humans have a powerful ability to illuminate the night sky. We leave streetlights on from dusk until dawn, operate businesses through and light our homes well after sunset. In world where natural cycles govern rhythm of life, we created major disruptor known as artificial at night. some cases, this pollution create is considered ‘diffuse’, such that there are many sources originating multiple directions therefore weak shadows cast in environment (imagine an illuminated soccer pitch). other ‘direct’ dark lighthouse). fascinating new study, Kathryn Bullough her team researchers University Exeter, UK, investigated impacts both diffuse direct sea roach (Ligia oceanica), marine crustacean changes colour blend with its surroundings avoid prying eyes predators. The discovered nights trigger intriguing clash between behaviour their colour-changing tactics night.Sea roaches live near shore, coastal cities illuminates underwater world. To understand how brighter impact these crustaceans, first collected dozens rocky shoreline Swanpool Beach, UK. Afterwards, placed animals into pitch-black box activate superpowers, encouraging them turn possible. then transferred buckets which half bottom was lined black gravel white gravel. Some were exposed source projected strong among textured floor, whereas others obliterated any shadows. Over 15-min observation period, crustaceans chose spend more time Moreover, when available, actively be shadowy regions bucket, suggesting they had clear preference for background. This things got interesting. When experienced lighting, generally stayed darker colouration – sometimes becoming even than before better match coveted contrast, experiencing lighting became lighter colour, Thus, causes mix up should become mishap leaves especially visible vulnerable predators.The decided take study one step further explore movement buckets. predicted would move quickly but erratically clashed background draw less attention themselves. colleagues hypothesized if camouflage environment, no reason stealthy manner. Indeed, faced hideouts backgrounds few far clever enough make fast irregular movements backgrounds, camouflaged, hardly moved.In end, sheds effects artificially brightened animals. showed brightening leads confusion roaches, can consequences survive. Let's all down lights give chance shine just not too brightly.

Language: Английский

Ecological alterations of promenade lighting on crustacean assemblage: A real-scale study DOI Creative Commons
Pablo Saenz-Arias,

Alejandro Irazabal,

Ma José Reyes-Martínez

et al.

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 216, P. 117951 - 117951

Published: April 14, 2025

Language: Английский

Citations

1
A hyperspectral open-source imager (HOSI) DOI Creative Commons
Jolyon Troscianko

BMC Biology, Journal Year: 2025, Volume and Issue: 23(1)

Published: Jan. 7, 2025

Abstract Background The spatial and spectral properties of the light environment underpin many aspects animal behaviour, ecology evolution, quantifying this information is crucial in fields ranging from optical physics, agriculture/plant sciences, human psychophysics, food science, architecture materials sciences. escalating threat artificial at night (ALAN) presents unique challenges for measuring visual impact pollution, requiring measurement low levels across human-visible ultraviolet ranges, all viewing angles, often with high within-scene contrast. Results Here, I present a hyperspectral open-source imager (HOSI), an innovative low-cost solution collecting full-field data. system uses Hamamatsu C12880MA micro spectrometer to take single-point measurements, together motorised gimbal control. hardware off-the-shelf components 3D printed parts, costing around £350 total. can run directly computer or smartphone graphical user interface, making it highly portable user-friendly. HOSI panoramic images that meet difficult requirements ALAN research, sensitive 0.001 cd.m −2 , 320–880 nm range resolution ~ 9 (FWHM) 2 cycles per degree. independent exposure each pixel also allows extremely wide dynamic encompass typical natural artificially illuminated scenes, sample night-time scans achieving full-spectrum peak-to-peak ranges > 50,000:1. Conclusions This system’s adaptability, cost-effectiveness nature position as valuable tool researchers investigating complex relationships between light, environment, biodiversity, further potential other fields.

Language: Английский

Citations

0
Artificial light at night causes conflicting behavioural and morphological defence responses in a marine isopod DOI Creative Commons
Kathryn Bullough, Kevin J. Gaston, Jolyon Troscianko

et al.

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2023, Volume and Issue: 290(2000)

Published: June 14, 2023

Encroachment of artificial light at night (ALAN) into natural habitats is increasingly recognized as a major source anthropogenic disturbance. Research focussed on variation in the intensity and spectrum ALAN emissions has established physiological, behavioural population-level effects across plants animals. However, little attention been paid to structural aspect this light, nor how combined morphological anti-predator adaptations are affected. We investigated lighting structure, background reflectance three-dimensional properties environment affect defences marine isopod Ligia oceanica. Experimental trials monitored responses including movement choice, also colour change, widespread mechanism considered relation exposure. found that isopods were consistent with classic risk-aversion strategies, being particularly exaggerated under diffuse lighting. behaviour was disconnected from optimal caused become lighter coloured while seeking out darker backgrounds. Our work highlights potential for structure play key role processes likely adaptations, survival, ultimately wider ecological effects.

Language: Английский

Citations

6
Ecological consequences of artificial light at night on coastal species in natural and artificial habitats: a review DOI

M. Ferretti,

Francesca Rossi, Lisandro Benedetti‐Cecchi

et al.

Marine Biology, Journal Year: 2024, Volume and Issue: 172(1)

Published: Nov. 26, 2024

Language: Английский

Citations

2
Hyperspectral open source imaging system DOI Creative Commons
Jolyon Troscianko

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: June 26, 2024

Abstract The spatial and spectral properties of the light environment underpin appearance scenes objects. As such its measurement is crucial for understanding many aspects animal behaviour, ecology evolution, along with more applications in fields ranging from optical physics, agriculture/plant sciences, human psychophysics, food science, architecture materials sciences. escalating threat artificial at night (ALAN) presents unique challenges measuring visual impact pollution, requiring low levels across human-visible ultraviolet ranges, all viewing angles, often high within-scene contrast. Here I present a hyperspectral open-source imaging system (HOSI), an innovative low-cost solution collecting full-field data. uses Hamamatsu C12880MA micro spectrometer to take single-point measurements, together motorised gimbal control. hardware off-the-shelf components 3D printed parts, costing around £350 total. can run directly computer or smartphone graphical user interface, making it highly portable user-friendly. HOSI panoramic images that meet difficult requirements ALAN research, sensitive 0.001 cd.m -2 , 320-880nm range resolution ∼9nm (FWHM) ∼0.2 degrees. independent exposure each pixel also allows extremely wide dynamic encompass typical natural artificially illuminated scenes, sample night-time scans achieving peak-to-peak ranges >50,000:1. This system’s adaptability, cost-effectiveness, nature position as valuable tool researchers investigating complex relationships between light, environment, ecology, biodiversity, further potential other fields.

Language: Английский

Citations

0
A clashing colour combination with deadly consequences DOI Open Access
Giulia S. Rossi

Journal of Experimental Biology, Journal Year: 2023, Volume and Issue: 226(17)

Published: Aug. 29, 2023

Humans have a powerful ability to illuminate the night sky. We leave streetlights on from dusk until dawn, operate businesses through and light our homes well after sunset. In world where natural cycles govern rhythm of life, we created major disruptor known as artificial at night. some cases, this pollution create is considered ‘diffuse’, such that there are many sources originating multiple directions therefore weak shadows cast in environment (imagine an illuminated soccer pitch). other ‘direct’ dark lighthouse). fascinating new study, Kathryn Bullough her team researchers University Exeter, UK, investigated impacts both diffuse direct sea roach (Ligia oceanica), marine crustacean changes colour blend with its surroundings avoid prying eyes predators. The discovered nights trigger intriguing clash between behaviour their colour-changing tactics night.Sea roaches live near shore, coastal cities illuminates underwater world. To understand how brighter impact these crustaceans, first collected dozens rocky shoreline Swanpool Beach, UK. Afterwards, placed animals into pitch-black box activate superpowers, encouraging them turn possible. then transferred buckets which half bottom was lined black gravel white gravel. Some were exposed source projected strong among textured floor, whereas others obliterated any shadows. Over 15-min observation period, crustaceans chose spend more time Moreover, when available, actively be shadowy regions bucket, suggesting they had clear preference for background. This things got interesting. When experienced lighting, generally stayed darker colouration – sometimes becoming even than before better match coveted contrast, experiencing lighting became lighter colour, Thus, causes mix up should become mishap leaves especially visible vulnerable predators.The decided take study one step further explore movement buckets. predicted would move quickly but erratically clashed background draw less attention themselves. colleagues hypothesized if camouflage environment, no reason stealthy manner. Indeed, faced hideouts backgrounds few far clever enough make fast irregular movements backgrounds, camouflaged, hardly moved.In end, sheds effects artificially brightened animals. showed brightening leads confusion roaches, can consequences survive. Let's all down lights give chance shine just not too brightly.

Language: Английский

Citations

0