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http://dx.doi.org/10.13047/KJEE.2016.30.4.724

Effects of Tropical Night and Light Pollution on Cicadas Calls in Urban Areas  

Ki, Kyong-Seok (Dept. of Horticulture and Landscape Architecture, Soundscape Ecology Laboratory, Sangji Univ.)
Gim, Ji-youn (Dept. of Applied Plant Science, Graduate School of Sangji Univ.)
Yoon, Ki-Sang (Sejong Academy of Science and Arts)
Lee, Jae-Yoon (Dept. of Horticulture and Landscape Architecture, Soundscape Ecology Laboratory, Sangji Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.30, no.4, 2016 , pp. 724-729 More about this Journal
Abstract
Environmental factors that affect the singing of cicadas have not been studied extensively, especially those affecting the cicadas' singing during the nighttime. Therefore, the objective of this study is to identify the effects of tropical night and light pollution on the cicadas' singing in a downtown area. The study sites were an apartment complex in Seocho-gu, Seoul, and the Chiaksan National Park in Wonju-si. The study subjects were Hyalessa fuscata and Cryptotympana atrata, which are the dominant species in Korea during summer. Cicada songs were recorded 24 hours a day, every day. The recording period was between July and August, lasting 25 days at the Seoul site and 14 days at the Chiaksan National Park. Temperature, precipitation, humidity, and amount of sunshine were selected as the environmental factors that potentially affect the cicadas' singing. Statistical analyses included correlations of meteorological factors with the cicadas' singing per hour, per 24 hours, and at nighttime (21:00~04:00). The results showed that: 1) H. fuscata began singing during the dawn hours, and the singing increased in intensity early in the morning. C. atrata's singing reached its peak in the morning and afternoon, ceased during sunset hours, thereby exhibiting a difference in the singing pattern of the two species. 2) The frequency of singing by H. fuscata decreased when C. atrata began to sing intensively in numbers, thereby exhibiting interspecific influence. 3) The results of the correlation analysis between meteorological factors and the singing of H. fuscata and C. atrata showed that both species tended to sing more when the temperature was higher and sang less on rainy days. 4) When limited to nighttime only, C. atrata showed a tendency of singing when the nighttime temperature was high ($24-30^{\circ}C$, average $27^{\circ}C$), whereas H. fuscata did not show a correlation with meteorological factors. However, since H. fuscata sang during the night in areas with artificial lighting, it was concluded that its singing was due to light pollution.
Keywords
Hyalessa fuscata; Cryptotympana atrata; BREEDING CALL; INTERSPECIFIC INTERACTIONS; CIRCADIAN RHYTHM;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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