| Records |
Author  |
Yang, M.; Hu, F.; Leng, X.; Chi, X.; Yin, D.; Ding, J.; Li, X.; Zuo, R.; Chang, Y.; Zhao, C. |
| Title |
Long-term effects of light spectra on fitness related behaviors and growth of the sea urchin Strongylocentrotus intermedius |
Type |
Journal Article |
| Year |
2021 |
Publication |
Aquaculture |
Abbreviated Journal |
Aquaculture |
| Volume |
537 |
Issue |
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Pages |
736518 |
| Keywords |
Animals |
| Abstract |
The appropriate light spectrum for reseeding small sea urchins is crucial for stock enhancement. Here, we investigated righting, foraging behavior and growth of small sea urchins Strongylocentrotus intermedius exposed to five light spectra (blue light: 440–490 nm, green light: 510–550 nm, red light: 630–670 nm, yellow light: 570–600 nm and white light) for 60 days. In the present study, S. intermedius exposed to red light had a smaller test diameter than those exposed to other light spectra (P < 0.05). No significant difference of daily weight gain was found among light spectra groups (P > 0.05). Consistently, the lantern length and weight of S. intermedius under red light were smallest among five light spectra. These results indicate that red light significantly inhibits the growth of S. intermedius. The successful foraging proportion showed no significant difference among the five light spectra (P > 0.05). Righting response time and foraging time, however, were significantly higher in S. intermedius under blue light than those exposed to other light spectra (both P < 0.01). This highlights the importance and necessity of kelp beds and shelters at the reseeding site to avoid the long-term effects of blue light on foraging and righting behaviors. |
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0044-8486 |
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GFZ @ kyba @ |
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3430 |
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| Author |
Yang, M.; Chen, Q.; Zhu, Y.; Zhou, Q.; Geng, Y.; Lu, C.; Wang, G.; Yang, C.-M. |
| Title |
The effects of intermittent light during the evening on sleepiness, sleep electroencephalographic spectral power and performance the next morning |
Type |
Journal Article |
| Year |
2019 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
| Volume |
51 |
Issue |
8 |
Pages |
1159-1177 |
| Keywords |
Human Health; Sleep |
| Abstract |
Most studies on the effects of light exposure have been conducted with continuous light. The present study investigated the effects of intermittent light exposure on sleepiness, mood, electroencephalographic activity during sleep and performance the next morning. Fifteen volunteers were scheduled to come to the sleep laboratory to experience different lighting conditions: intermittent bright light, continuous bright light and continuous dim light. Subjective sleepiness and mood were assessed during light exposure, with electroencephalographic recording during sleep. After waking the next morning, participants filled out questionnaires and went through two cognitive tasks. The results revealed significantly lower ratings of sleepiness after intermittent light exposure, which is not different from the ratings in the continuous bright light condition, and an increase in vitality during later part of the evening and more beta activity during the first 90 minutes of sleep in the intermittent light condition, in comparison with the continuous dim light condition. However, both intermittent and continuous bright light exposure showed no difference from the continuous dim light condition in subjects' mood and cognitive functioning the next morning. The data indicated intermittent light during evening decreased sleepiness, had only minimal impact on mood in the evening, increased beta electroencephalographic activity during sleep, but had no significant influence on cognitive functioning the next morning. |
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1477-1535 |
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GFZ @ kyba @ |
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2267 |
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Xue, X.; Lin, Y.; Zheng, Q.; Wang, K.; Zhang, J.; Deng, J.; Abubakar, G.A.; Gan, M. |
| Title |
Mapping the fine-scale spatial pattern of artificial light pollution at night in urban environments from the perspective of bird habitats |
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Journal Article |
| Year |
2019 |
Publication |
The Science of the Total Environment |
Abbreviated Journal |
Sci Total Environ |
| Volume |
702 |
Issue |
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Pages |
134725 |
| Keywords |
Remote Sensing; Animals; ALAN pollution; Circuitscape; Land cover; Nighttime light image; Urban ecology |
| Abstract |
The increase in artificial light at night (ALAN) is a global concern, while the pattern of ALAN pollution inside urban areas has not yet been fully explored. To fill this gap, we developed a novel method to map fine-scale ALAN pollution patterns in urban bird habitats using high spatial resolution ALAN satellite data. First, an ALAN pollution map was derived from JL1-3B satellite images. Then, the core habitat nodes (CHNs) representing the main habitats for urban birds to inhabit were identified from the land cover map, which was produced using Gaofen2 (GF2) data, and the high probability corridors (HPCs), indicating high connectivity paths, were derived from Circuitscape software. Finally, the ALAN patterns in the CHNs and HPCs were analysed, and the mismatch index was proposed to evaluate the trade-off between human activity ALAN demands and ALAN supply for the protection of urban birds. The results demonstrated that 115 woodland patches covering 4149.0ha were selected as CHNs, and most of the CHNs were large urban parks or scenic spots located in the urban fringe. The 2923 modelled HPCs occupying 1179.2ha were small remaining vegetation patches and vegetated corridors along the major transport arteries. The differences in the ALAN pollution patterns between CHNs and HPCs were mainly determined by the characteristics of the green space patches and the light source types. The polluted regions in the CHNs were clustered in a few regions that suffered from concentrated and intensive ALAN, while most of the CHNs remained unaffected. In contrast, the 727 HPCs were mainly polluted by street lighting was scattered and widely distributed, resulting a more varying influence to birds than that in the CHNs. Relating patterns of the ALAN to bird habitats and connectivity provides meaningful information for comprehensive planning to alleviate the disruptive effects of ALAN pollution. |
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College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, China. Electronic address: ganmuye@zju.edu.cn |
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English |
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0048-9697 |
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PMID:31734607 |
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no |
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GFZ @ kyba @ |
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2765 |
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| Author |
Xu, Y.; Knudby, A.; Côté-Lussier, C. |
| Title |
Mapping ambient light at night using field observations and high-resolution remote sensing imagery for studies of urban environments |
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Journal Article |
| Year |
2018 |
Publication |
Building and Environment |
Abbreviated Journal |
Building and Environment |
| Volume |
145 |
Issue |
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104-114 |
| Keywords |
Remote Sensing |
| Abstract |
Artificial lighting allows for a variety of activities to take place in the absence of sunlight, but also has an increasingly recognized range of negative social and health-related effects. For studies of urban ambient light at night (ALN), objective and standardized data on the amount of ALN experienced by people is often unavailable at the necessary intra-urban spatial scale. In this paper, we outline options for producing such data through (1) field observations acquired with a luminance meter mounted on a vehicle, (2) a 1-m resolution image mosaic produced from a dedicated aerial survey, and (3) a 50-m resolution image taken from the International Space Station. We produce two remote sensing-derived maps of ALN for a large urban area in Canada, and compare their spatial detail to the World Atlas of Artificial Night Sky Brightness, a publicly available alternative data source. Convergent validity with field observations suggests that both mapping approaches can be used to quantify the amount of light humans are exposed to at night, at different locations across a large urban area, and may thus aid in further studying the varied effects of artificial nighttime lighting. |
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0360-1323 |
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GFZ @ kyba @ |
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1998 |
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| Author |
Xu, P.; Wang, Q.; Jin, J.; Jin, P. |
| Title |
An increase in nighttime light detected for protected areas in mainland China based on VIIRS DNB data |
Type |
Journal Article |
| Year |
2019 |
Publication |
Ecological Indicators |
Abbreviated Journal |
Ecological Indicators |
| Volume |
107 |
Issue |
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Pages |
105615 |
| Keywords |
Remote Sensing |
| Abstract |
Protected areas, a globally accepted conservation strategy, play a fundamental role in biodiversity and species conservation. There are increasing concerns about the ecological influence of nighttime light within protected areas due to the emergence of more light-related ecological issues. Previous approaches for detecting nighttime light mainly used the traditional data source released by the Defense Meteorological Satellite Program Operational Linescan System (DMSP/OLS), but its coarse spatial resolution and limited radiometric resolution dramatically hamper prompt detection. In this study, we used data from a new source, the Visible Infrared Imaging Radiometer Suite Day-Night Band (VIIRS DNB) to detect nighttime light disturbance within protected areas of mainland China. Protected areas extracted from Landsat 8 Operational Land Imager and the Thermal Infrared Sensor (OLI-TIRS) images served as ground truths to assess detection accuracy. We found that the VIIRS DNB data provided more and better details compared with the traditional DMSP/OLS data. Pixel-based trend analysis clearly indicated that within the protected areas lighted pixels existed extensively and increased significantly from 2012 to 2017. This study provides a new solution to better understand human activities within protected areas. |
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1470160X |
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GFZ @ kyba @ |
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2612 |
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