• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.160.1-160.1
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• 2009

• Proceedings of the PSK Conference
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• 2000.10a
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• pp.261.1-261.1
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• 2000

• Korean Journal of Ecology and Environment
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• v.54 no.4
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• pp.280-290
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• 2021

The present study investigated species richness and phytoplankton community structure in lakes in the Geum River Basin during autumn and spring seasons. Surveys were conducted between September and November 2019, and between April and May 2020, which corresponded to the autumn and spring seasons, respectively, to explore the distribution characteristics of the species. A total of 49 species of phytoplankton belonging to 31 genera and seven classes were identified in Cho Pyeong-ji, 51 species belonging to 29 genera and six classes were identified in Song Ak-ji, 49 species belonging to 32 genera and seven classes were identified in Cheong Cheon-ji, 82 species belonging to 45 genera and six classes were identified in Ye Dangji, and 70 species belonging to 40 genera and six classes were identified in Ganwol Lake. A total of 43 species belonging to 74 genera and seven classes were identified. The ranges of phytoplankton standing crop were as follows: 223~3533 cells mL^-1 in Cho Pyeong-ji, 881~176018 cells mL^-1 in Song Ak-ji, 402~6139 cells mL^-1 in Cheong Cheon-ji, 262~10460 cells mL^-1 in Ye Dang-ji, and 20413~330695 cells mL^-1 in Ganwol Lake. Phytoplankton diversity in Cho Pyeong-ji, Song Ak-ji, Cheong Cheon-ji, Ye Dang-ji, and Ganwol Lake were 1.10~2.60, 0.56~2.03, 0.21~2.03, 0.65~2.57, and 0.44~1.12, respectively. Phytoplankton species richness in Cho Pyeong-ji, Song Ak-ji, Cheong Cheon-ji, Ye Dang-ji, and Ganwol Lake were 1.91~4.99, 1.82~3.26, 1.26~4.17, 2.07~5.37, and 1.90~2.43, respectively. Phytoplankton evenness indices in Cho Pyeong-ji, Song Ak-ji, Cheong Cheon-ji, Ye Dang-ji, and Ganwol Lake were 0.38~0.78, 0.18~0.69, 0.08~0.71, 0.22~0.72, and 0.14~0.38, respectively. Phytoplankton dominance indices in Cho Pyeong-ji, Song Ak-ji, Cheong Cheon-ji, Ye Dang-ji, and Ganwol Lake were 0.40~0.83, 0.55~0.96, 0.44~0.99, 0.42~0.93, and 0.89~0.97, respectively.

• The Korean Journal of Zoology
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• v.36 no.4
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• pp.476-486
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• 1993

From a population in Kang-Nae, Cheong-won, Chung-Buk, acoustic behaviours of Gray-headed Bunting (Emberizo fucata) were obsenred. The singing of males was classified into two major types, stereotyped song and squeaky song. The stereotyped songs of eight territorial males were recorded Intraindividual and individually distinctive features were studied. Individuals produced their song in distinctive ways in terms of song duration and the number of syllables. Gray-headed Buntings sang various syllable types. We found that a male produced more constant syllables in anterior group than those in posterior group. Males sang distinctive syllables among them. Some syllable types which were frequently appeared in an anterior group. In these analyses, we suggest that the anterior groups in songs of a Gray-headed Bunting express the constant information and the posterior groups contribute to situational communication.

• Animal cells and systems
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• v.8 no.2
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• pp.89-95
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• 2004

The bush warblers (Cettia diphone) have been recognized to possess two types of songs: a normal song that plays roles in attracting mate and territorial defense, and an anomalous song. The present study suggests that the anomalous song functions as an alarm signal as well as other unknown signals. Field observations and playback experiments on the anomalous song of bush warbler were conducted in order to investigate the contextual information that occurred between sender and receiver. In the field observation, the males frequently emitted anomalous songs to potential predators. The males responded with an anomalous song to stuffed potential predators. The distance from where the anomalous song occurs to the stimulating source varied depending upon the kinds of stimulus. The males of bush warbler possibly show different responses to the anomalous song depending on the level of danger. When the anomalous song was played back to terrestrial males and females, no distinctive behavior was observed. The anomalous song may be sung to defend the territory against predators or to distract invaders from the nest and female because the male and female behaviors were related with the anomalous song and its phonetic characteristics.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.11a
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• pp.181-182
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• 2007

• Magazine of the Korea Concrete Institute
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• v.18 no.5 s.94
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• pp.16-22
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• 2006

• Proceedings of the Korean Vacuum Society Conference
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• 2007.02a
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• pp.177-177
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• 2007

• Proceedings of the Zoological Society Korea Conference
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• 1998.10b
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• pp.266.2-266
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• 1998

No Abstract, See Full Text

• 전기의세계
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• v.57 no.12
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• pp.34-42
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• 2008