• Journal of Wetlands Research
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• v.21 no.3
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• pp.199-206
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• 2019

To understand vegetational characteristics of abandoned paddy terraces (APTs), species composition and plant species richness of APTs were compared with those of other natural- and constructed wetlands (NWs and CWs, respectively). Based on frequency of major vegetational components, Phragmites japonicus was more common in APTs (23.9%) than NWs (10.8%) and CWs (10.8%), whereas P. australis was less frequent in APTs (18.3%) than NWs (43.1%) and CWs (35.4%). Typha orientalis was common only in APTs (19.7%), whereas T. angustifolia was relatively common in NWs (21.5%) and CWs (32.3%). In addition, some wetland obligate species such as Leersia japonica, Oenanthe javanica, and Sium suave were frequently found only in APTs. In particular, APTs showed higher plant species richness ($6.3{\pm}2.2\;species/m^2$) than NWs ($4.9{\pm}1.8\;species/m^2$) and CWs ($3.9{\pm}1.3\;species/m^2$). APTs exhibited not only their distinctive vegetational characteristics but also higher ecological value in terms of plant species richness. Further attention on APTs as valuable biotopes supporting diverse plant species and continuous effort for management and conservation are needed more.

• Korean Journal of Ecology and Environment
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• v.52 no.3
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• pp.274-283
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• 2019

Beta diversity is an efficient means of assessing the spatial variation in community composition among sites. To present fish community variation and LCBD (Local Contribution to Beta Diversity) among sites in stream, 6 sampling sites were selected in Cheonggye stream. Fish communities, environmental and habitat variables were collected at sites from April 2014 to October 2015. We used the total variance of the fish community data table (site-by-species community table) based on different forms, presence-absence, abundance, and Hellinger transformation, to estimate and compare beta diversity and LCBD. Fish community data table transformed by Hellinger distance showed the higher values of beta diversity than presence-absence and abundance data table. A similar patterns of LCBD were observed with presence-absence and Hellinger transformed data table. Low value of beta diversity calculated by community data table with abundance was due to the non-normality of fish assemblage data. Additionally, correlation coefficients were calculated to evaluate the relationships among LCBD, community indices and physicochemical variables. LCBD showed negative correlation coefficients with Shannon diversity. Overall, application of beta diversity analysis is an efficient method of addressing spatial variation of fish communities and ecological uniqueness of the sites in stream.

• Korean Journal of Ecology and Environment
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• v.54 no.2
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• pp.96-101
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• 2021

In this study, we wanted to obtain the information of the ecological impact of alien species on native fish communities. The Ichthyofauna and fish community in Joongchosan Reservoir and Bukchosan Reservoir in Gunsan-si Korea were investigated over the period from March to October 2020. During the survey period, a total of 1,895 individuals representing eight species, five families, and four orders were caught in the Joongchosan Reservoir. In the Bukchosan Reservoir, a total of 171 individuals were caught, representing seven species, five families, and three orders. The dominant species and subdominant species of Joongchosan Reservoir were Pseudorasvora parva (661 individuals, RA: 34.7%), and Rhodeus ocellatus (660 individuals, RA: 34.7%). Conversely, Micropterus salmoides (77 individuals, RA: 45.0%), and Carassius auratus (60 individuals, RA: 35.1%), were the two most common species in the Bukchosan Reservoir. The community indices showed a dominance of 0.697, diversity of 1.483, evenness of 0.713, and species richness of 0.928 in the Joongchosan Reservoir. In comparison, the community indices in the Bukchosan Reservoir showed a dominance of 0.801, diversity of 1.304, evenness of 0.670, and species richness of 1.167. This study confirms that the number of native fishes and the associated community diversity have decreased due to the influence of Micropterus salmoides. This highlights the need for removal of alien species from reservoirs, while simultaneously preventing future introductions.

• Journal of Environmental Impact Assessment
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• v.33 no.2
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• pp.64-73
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• 2024

As the seriousness of habitat destruction caused by development projects emerges, the importance of environmental impact assessment (EIA) is increasing to preserve biodiversity. In previous studies, research is being conducted to quantitatively evaluate the biodiversity impact of development factors and surrounding environmental factors on the landscape scale, but research on the factors affecting the reduction of biodiversity based on development projects is insufficient. This study examined whether independent variables (size of development project, type of the development, DEM, ecosystem and nature map, distance from the green land, distance from the protected area), which have been proven to effect biodiversity through the previous researches, have a significant effect on the change of richness index (RI) through multi-class logistic regression analysis, T-test, and analysis of the development type. As a result, only the size of development project and the first richness index in EIA showed p-value less than 0.05. And it was confirmed that the reduction in biodiversity was significantly changed in the following construction types: installation of sports facilities, energy development, and development of industrial location and industrial complex. Since the results of this study confirmed that the impact of the variables may be inconsistent depending on the analysis scale, additional study of necessary indicators at the development project is needed to analyze biodiversity changes in EIA accurately.

• Proceedings of The KACE
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• 2017.08a
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• pp.75-78
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• 2017

기존의 프로그래밍 교육용 프로그램(스크래치, 엔트리)들은 프로그래밍의 진입장벽을 낮춰 교육의 효율을 높일 수 있었다[1][2]. 하지만 그러한 접근 방식은 실용적인 프로그래밍에 대한 지표가 되기에는 좋지 않다. 우리는 교육용 프로그램으로 게임메이커 스튜디오(이하 GM:S)를 사용하는 것을 제안 하고, 기존 지표의 단점을 풍부한 스크립팅 API와 네이티브 라이브러리 링크 등으로 극복한 GM:S를 교육적 목적으로 사용하는 방법에 대해 알아보고자 한다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.269-270
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• 2003

이슬은 지표의 물체가 야간복사에 의해 냉각되어 부근의 기온이 노점이하로 떨어지면서 응결되어 생성된 것이다(김광식, 1995). 이슬생성의 세 가지 기본적인 조건은 풍부한 습기와 충분한 야간복사냉각 그리고 지면이나 풀잎사귀 등에 수분이 풍부하여야 한다. 충분한 습기는 주위의 호수 또는 연안으로부터 공급이나 비가 온 후의 습한 토양에서 공급된다고 할 수 있다. 우리나라에 늦여름부터 늦가을까지 이슬이 많이 생기는 이유가 이와 같은 조건을 갖추었기 때문이다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1993.10a
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• pp.23-24
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• 1993

전문가 시스템이란 어떤 분야의 전문가가 가지고 있는 문제해결능력을 컴퓨터 프로그램화한 것이다. 수박에 관하여 풍부한 지식을 가지고 오랜 경험을 쌓은 전문가들은 수박병에 관해 신뢰성 있는 진단을 내리고 적절히 대응할 수 있다. 하지만 일반 농민들은 병해에 대하여 많은 지식을 가지고 있지 못할 뿐만 아니라 해당 지역에 잘 발생하지 않는 병이 발생했을 때 전문가의 도움을 필요로 하는 경우가 많을 것이다. 본 연구에서는 수박을 오랫동안 재배하여 경험과 지식이 풍부한 전문가로부터 수박병 진단을 위한 규칙을 알아내어 수박병 진단을 위한 전문가 시스템(그림 1)을 개발하였다. (중략)

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.351-352
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• 2013

다양성은 문화산업의 기반을 풍부하게 해주는 중요한 요소이다. 다양성영화는 비주류, 다문화, 소수, 마니아 적인 성격을 가지고있는 예술영화, 다큐멘터리, 독립영화를 포괄하는 개념이다. 이러한 개념을 바탕으로 하는 다양성영화는 지역의 다양한 소재를 활용하고 다양한 의견을 포괄할 수 있어서 문화적인 풍부함을 이룰 수 있게 하는 근간이 된다. 이 글에서는 다양성영화가 문화산업의 기반 구조를 충실히 하는 중요한 매개가 될 수 있음을 보이고 이를 고찰하였다.

• The Academic Congress of Korean Shoulder and Elbow Society
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• 2009.03a
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• pp.216-216
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• 2009

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.183-184
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• 2000

김 양식장은 대부분 천해해역으로서 영양염류가 풍부하여 김의 생산력은 증가되나 풍부한 영양염은 김의 성장을 촉진함과 동시에 잡균, 잡조(파래, 규조등)의 중식도 촉진된다. 김망에 부착된 잡조류를 구제하는 산처리제로서 염산을 사용하는 사례가 있어 해양생태계 뿐만 아니라 김 소비에 나쁜 영향을 끼친다. 정부에서는 염산사용에 따른 어장의 황폐화를 방지하고 양질의 김 생산을 위하여 산 처리제로서 염산 등 무기산에 대체할 수 있는 유기산를 사용하도록 권장하고 있으나 제조공정, 경제성, 현장적용과 효과면에서 여러 가지 문제가 해결되지 않고 있다. (중략)