• 한국환경복원기술학회지
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• 제27권4호
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• pp.15-27
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• 2024

Ecosystem-disturbing plant species pose a significant threat to native ecosystems due to their high reproductive capacity, making it essential to monitor their distribution and develop effective mitigation strategies. Consequently, it is crucial to enhance the evaluation of the impacts of these species in environmental impact assessments by incorporating scientific evidence alongside qualitative assessments. This study introduces a dispersal model into the species distribution model to simulate the potential spread of ecosystem-disturbing plant species, reflecting their ecological characteristics. Additionally, we developed mitigation scenarios and quantitatively calculated reduction rates to propose effective mitigation strategies. The species distribution model showed a reliable AUC (Area Under the Curve) of at least 0.890. The dispersal model's results were also credible, with 31 out of 34 validation coordinates falling within the predicted spread range. Simulating the impact of the spread of ecosystem-disturbing plant species over the next five years revealed that one project site had potential habitats for Ambrosia artemisiifolia, necessitating robust mitigation measures such as seed removal. Another project site, with potential habitats for Symphyotrichum pilosum, indicated that physical removal methods within the site were effective due to the species' relatively short dispersal distance. These findings can serve as fundamental data for project executors and reviewers in evaluating the impact of the spread of ecosystem-disturbing plant species during the planning stages of projects.

• 한국환경복원기술학회지
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• 제6권1호
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• pp.51-56
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• 2003

The urban stream include the channel and its adjacent banks, or hillslopes and it consists of various landscape elements. The riparian ecosystem is important to people. Its water is extracted for irrigation and drinking supplies. Biodiversity and many wetland species are protected here. The riparian ecosystem is diverse and needs to be preserved well. So, it is necessary to measure the features of the urban stream accurately to figure out the change of the riparian ecosystem. However, the traditional Electronic Distance Measurement(EDM) surveying is difficult to measure the curvilinear features of the stream - e, g, angle, curve. The beacon Differential Global Positioning System(DGPS) can handle to measure the curvilinear shape. Therefore, the purpose of this study is to measure the change of the river bed in urban stream accurately using realtime beacon DGPS, and ultimately to provide the basic data for identifying the change of the river ecosystem.

• Journal of Ecology and Environment
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• 제35권3호
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• pp.167-175
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• 2012

Coastal sand dune systems are particularly fragile and threaten the environment. However, these systems provide fundamental ecosystem services to the nearby urban areas, acting, for example, as protective buffers against erosion. In this paper, we attempt to classify the biotope types of coastal sand dune ecosystems and select an index for the assessment of the conservation value. The types of biotopes are categorized based on the vegetation map; floras are examined in order to research the effects of hinterlands on coastal sand dunes. In addition, a naturalization rate and an urbanization index for each biotope type in hinterlands are analyzed. In the ecosystem of coastal sand dunes, the urbanization index and naturalization rate shows a higher value in sand dunes with areas of road, residential, and idle land in farm villages, rice fields, and fields. On the contrary, a lower value in the urbanization index and naturalization rate is present when typical biotope types, such as sand dune vegetation and natural Pinus thunbergii forests, are widely distributed. Based on these results, urbanization index and naturalization rate should be used as critical indices for the assessment of the ecosystem of costal sand dunes.

• 한국동물학회:학술대회논문집
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• 한국동물학회 2003년도 한국생물과학협회 학술발표대회
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• pp.28-28
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• 2003

No Abstract, See Full Text

• 벤처창업연구
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• 제15권4호
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• pp.1-15
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• 2020

창업생태계가 기업가정신 향상의 선행요소로 밝혀지면서 국가에서는 창업생태계 고도화를 사업들이 활발히 수행되고 있고 관련 연구도 진행하고 있다. 창업생태계는 창업자, 정부기관 및 투자자와 의 상호관계적인 작용으로 기업가정신 뿐만 아니라 국가의 경제성장을 위해 종요한 요소로 관심을 받고 있으나 창업생태계에 대한 정의를 비롯하여 국가별 제도적 및 정치학적 맥락의 상이함으로 인해 측정지표에 대한 비판이 증가하고 있다. 본 연구에서는 국내 실정에 적합한 창업생태계 지표개발 및 각 지역의 창업생태계 수준을 측정할 수 있는 지표를 개발하고자 한다. 창업 분야별 전문가의 FGI 및 델파이 조사를 실시하여 현존하는 지표들이 국내 실정에 얼마나 부합한지를 검증하고 면밀한 검토를 통해 국내의 지역창업생태계를 측정할 수 있는 지표를 개발하였다. 그 결과, 국내 지역 창업생태계는 정책(Policy), 투자(Finance), 문화(Culture), 시장(Market), 인적자원(Human Capital), 지원(Support), 지식(Knowledge)등 7개 지표와 지표별 각각 2~4개의 하위요소, 하위요소별 각각 1~4개로 구성되어 총 22개의 하위요인, 38개의 세부요인으로 구성되었다. 본 연구를 통해 지역의 창업생태계를 진단하고 지역별 강점 특화 및 약점을 보완할 수 있는 차별적 정책을 제안하는데 활용할 수 있을 것으로 기대한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.543-546
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• 2006

NDVI has been very frequently used to estimate several biophysical parameters that are required for ecosystem models. Leaf area index (LAI), canopy closure, and biomass are among those biophysical parameters that are estimated by empirical relationship with NDVI. However, the type of remote sensing signals (raw DN value, at-sensor radiance, atmospherically corrected reflectance) used can vary the calculation of NDVI. In this study, we tried to attempt to compare the influence of NDVI linked with forest LAI for the watershed-scale ecosystem models to estimate evapotranspiration. Landsat ETM+ data were used to obtain various NDVI values over the study area in central Korea. The NDVI-based LAI and the resultant evapotranspiration estimation were greatly varied by the remote sensing signal applied.

• Journal of Information Technology Applications and Management
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• 제26권2호
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• pp.75-87
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• 2019

Currently, the nation's medical industry is changing due to the rapid development of technology. In addition, medical accidents occurring in the medical industry are gradually increasing amid the drastic changes. Therefore, a possible solution to medical accidents in the changing health care industry is needed. Accordingly, this study uses network-centrality analysis to examine the business ecosystem of smart surgical medical systems to find ways to increase the efficiency of surgery as well as the resolution of medical accident problems, and to suggest the direction of development of the medical system in the future from a systematic business ecosystem perspective.

• 경영정보학연구
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• 제13권2호
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• pp.55-72
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• 2011

환경 복잡성의 증대와 변화의 가속화로 인하여 기업 미래에 대한 불확실성이 높아짐에 따라 정보기술(IT)에 기반을 둔 디지털화의 확산이 단위 기업의 경계를 넘어 기업군 즉, 기업생태계(Business Ecosystem) 또는 산업생태계(Industrial Ecosystem)에 미치는 영향에 대한 관심이 높아지고 있다. 경영 현장에서는 기업 및 산업의 디지털화가 기업 및 산업 생태계의 건강성과 지속성을 높이는 도구로 기대와 주목을 받고 있다. 또한 최근 연구들은 정보기술이 기업군 및 산업 생태계 내에서 정보나 자원의 공유를 용이하게 함으로써 기업 간의 상호교류를 촉진시키는 역할을 한다는 관점에서 정보기술과 기업생태계의 건강성 간의 관계에 관심을 집중하고 있다. 나아가 거시적 관점에서 IT는 기업 간의 상호작용의 수준을 넘어 산업 자체의 구도와 판도에 변화를 초래하고 있는 것으로 인식되고 있다. 그러나 이러한 기업군 및 산업생태계 차원의 변화 현상은 매우 광범위하고 복잡하게 나타나 산업내 다양한 개체들의 상호작용과 의존성을 파악하기에 적합한 분석 방법론이 충분히 개발되지 않고 있다. 본 연구에서는 디지털 변환(Digital Transformation)에 의해 초래되는 기업생태계의 전반적 구조 변화와 진화과정을 분석하기 위한 생태계 매핑(Ecosystem Mapping) 방법론을 단계적으로 개발하고 이를 실제 산업의 분석에 적용함으로써 방법론의 적용 가능성과 디지털 변환이 산업 생태계의 구조변화에 미치는 영향에 대한 분석을 동시에 시도하였다. 특히 본 연구에서는 국내 영화산업을 디지털 변화에 의한 영향을 분석하는 대상으로 선정하였다. 활동사진기의 발명으로 출발한 영화산업은 유성영화, 컬러영화의 등장이라는 산업 혁신의 역사에서 보는 바와 같이 기술의 진보가 산업 생태계의 형성과 변화에 극적인 영향을 미치는 산업으로서 디지털 기술의 도입에 따라 산업 생태계의 구조가 변화하는 현상을 분석하기에 매우 적합한 산업으로 평가되었기 때문이다.

• ALGAE
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• 제30권2호
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• pp.121-137
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• 2015

Studies on carbon flux in the oceans have been highlighted in recent years due to increasing awareness about climate change, but the coastal ecosystem remains one of the unexplored fields in this regard. In this study, the dynamics of carbon flux in a vegetative coastal ecosystem were examined by an evaluation of net and gross ecosystem production (NEP and GEP) and $CO_2$ exchange rates (net ecosystem exchange, NEE). To estimate NEP and GEP, community production and respiration were measured along different habitat types (eelgrass and macroalgal beds, shallow and deep sedimentary, and deep rocky shore) at Gwangyang Bay, Korea from 20 June to 20 July 2007. Vegetative areas showed significantly higher ecosystem production than the other habitat types. Specifically, eelgrass beds had the highest daily GEP ($6.97{\pm}0.02g\;C\;m^{-2}\;d^{-1}$), with a large amount of biomass and high productivity of eelgrass, whereas the outer macroalgal vegetation had the lowest GEP ($0.97{\pm}0.04g\;C\;m^{-2}\;d^{-1}$). In addition, macroalgal vegetation showed the highest daily NEP ($3.31{\pm}0.45g\;C\;m^{-2}\;d^{-1}$) due to its highest P : R ratio (2.33). Furthermore, the eelgrass beds acted as a $CO_2$ sink through the air-seawater interface according to NEE data, with a carbon sink rate of $0.63mg\;C\;m^{-2}\;d^{-1}$. Overall, ecosystem production was found to be extremely high in the vegetated systems (eelgrass and macroalgal beds), which occupy a relatively small area compared to the unvegetated systems according to our conceptual diagram of a carbon-flux box model. These results indicate that the vegetative ecosystems showed significantly high capturing efficiency of inorganic carbon through coastal primary production.

• 한국환경복원기술학회지
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• 제10권3호
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• pp.8-13
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• 2007

This study was surveyed to know changing flora between pre and post of restoration in cheonggyechon. As results, it was surveyed families 33, species 94 in 2003 and families 39, species 156 in 2005. In 2006, it was surveyed families 38, species 171. This result shows that cheonggyechon is unstable initial condition in restored stream ecosystem. Also, Naturalized species was 19 species in 2003 and it was respectively 44, 46 species in 2005, 2006. Hazard species of ecosystem was in common 3 species in three surveys. Recently, as time goes by, introduced species are increasing. And succession has mainly been progressed by one year or binary herbs. To administer restored stream ecosystem, monitoring is essential. Therefore, continuous monitoring about Naturalized species and Hazard species of ecosystem is also very important. Further, Because change of vegetation on pre and post of Restoration in Cheonggyechon Stream is very important, Monitoring will have been surveyed continuously.