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标题：The Identification of Relationship Between Light Pollution and Roosting Sites of Barn Swallows using VIIRS DNB Imagery (Case Study: Java and Bali Islands)
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作者：Amalia Gita Ayudyanti ; Iswari Nur Hidayati
期刊名称：EnvironmentAsia
印刷版ISSN：1906-1714
出版年度：2021
卷号：14
期号：2
页码：64-74
DOI：10.14456/ea.2021.17
语种：English
出版社：Thai Society of Higher Eduction Institutes on Environment
摘要：Java and Bali Islands are functions as a lane for the migration of barn swallows (Hirundo rustica). These islands have a high level of light pollution in Indonesia. Changes in light pollution levels impact the migration processes of nocturnal birds, especially true of their choice of roosting sites which are becoming more focused around urban areas. The purpose of this research is to find out the relationship between light pollution levels and the selection of roosting sites for barn swallows that migrate at night. This is important to know the impact of artificial electric lighting at night on an annual nocturnal bird migration that was identified by using the correlation analysis. That was carried out using Spearman’s ranking as a correlation analysis method. Sources of data that were used in this research are Visible Infrared Imaging Radiometer Suite Day-Night Band (VIIRS DNB) imagery data. VIIRS DNB was collected using Earth Engine. VIIRS-DNB data was processed by Google Earth Engine that can be used immediately. The results show that the correlation between light pollution and the selection of roosting sites is robust. That was indicated by the correlation value at 0.9. Based on the value, roosting sites and light pollution have a positive correlation. The higher light pollution in an area can increase the number of roosting sites. The nocturnal birds usually use the light for their direction and artificial electric lighting at night can be distracting their migration to a lighter place, urban area. Therefore, the number of correlation is high. The significance of light pollution on birds’ roosting sites during the migration period in Java and Bali Islands was obtained from the z count value which was greater than the z tables, which is in 95%.
关键词：Visible Infrared Imaging Radiometer Suite Day/Night Band (VIIRS DNB); Light pollution; Roosting site; Spearman’s ranking