• Journal of Korean Society of Forest Science
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• v.107 no.2
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• pp.113-125
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• 2018

Subalpine zone is geographically vulnerable to climate change. Forest vegetation in this zone is one of the important basic indicator to observe the influence of climate change. This study was conducting phytosociological community classification and endemic-rare plants investigation based on vulnerable species to climate change at the subalpine zone, Mt. Jiri. Vegetation data were collected by 37 quadrate plots from March to October, 2015. In order to understand the species composition of plant sociological vegetation types and the ecological impacts of species, we analyzed the layer structure of vegetation type using important values. Vegetation type was classified into eight species groups and five vegetation units. The vegetation types can be suggested as an indicator on the change of species composition according to the future climate change. There were 9 taxa endemic plants and 17 taxa rare plants designated by KFS(Korea Forest Service) where 41.2% of them were the northern plant. Endemic-rare plants increased as the altitude of vegetation unit increase. Importance value analysis showed that the mean importance value of Abies koreana was highest of all vegetation units. Based on analysis of each layer, all units except vegetation unit 1 were considered to be in competition with the species such as Quercus mongolica and Acer pseudosieboldianum. The results of this study can be a basic data to understand the new patterns caused by climate change. In addition, it can be a basic indicator of long-term monitoring through vegetation science approach.

• Korean Journal of Environment and Ecology
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• v.15 no.3
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• pp.247-256
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• 2001

The purpose of the present study is to prepare the conservation category to establish the Natural Ecosystem Conservation Area(NECA) in Korea. The authors prepared the conservation category for the NECA based on the previous relevant papers and reports. This draft of conservation category was examined by way of the case study. From this, the possible factors are introduced to prepare the final conservation category that can be applied directly in Korean situation for the conservation of natural areas. The present conservation category was prepared based on the possible data, while some factors of which do not possess the adequate raw data at the moment was removed. According to the reference analyses from the previous conservation categories reported in order to prepare the conservation category in the NECA, a total of 27 factors was assessed; 21 for rarity and 15 fur utility and diversity, 13 far size, for both naturalness and human influence, 13 for typicalness 12 and 10 for fragility. From the literature reviews, the categories which quantitatively assessed was 13: 9 for rarity, 8 far human influence, and 5 for size. From the 27 conservation categories assessed, the factors such as rarity, taxonomic distinctiveness and threat was regarded as applicable to the Korean situation. Furthermore, the criteria such as use could be applied further when this is supported by the augmentative research and field studies.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.77-77
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• 2019

본 연구는 DMZ일원에서 생육하고 있는 자생식물에 대하여 우선순위를 설정하고, DMZ일원 종다양성의 지속적인 건강성 유지 및 보전을 위한 중장기 모니터링 기술을 개발하기 위하여 중점관리종을 선정하고자 하였다. 또한, 이를 토대로 DMZ지역과 북방계지역에 대한 생물자원을 연구할 수 있는 기본틀을 마련하고 생물권보전지역을 지정함으로써 국제교류 및 이해에 기여하는 연구를 수행하였다. 현재 DMZ일원의 관속식물상은 157과 754속 2,047종 12아종 340변종 105품종 총 2,504분류군이 생육하고 있다. 이 중 희귀식물은 총 285분류군, 특산식물은 총 124분류군, 침입외래식물은 130분류군이 분포하고 있다. 전체 2,504분류군 중 희귀식물, 특산식물, 침입외래식물을 대상으로 전국분포정보 및 DMZ일원 분포정보를 수집하였다. 이를 토대로 희귀 특산식물에 해당하는 보호종 선정을 위한 평가지표는 IUCN 적색목록기준 의 국내수준 및 DMZ일원의 희귀 특산식물의 등급을 CR종 3점, EN종 2점 VU종 1점으로 점수를 평가한 뒤 국내 분포 지역수(IUCN red list criteria B)에 대한 가중치를 적용하여 보호우선순위를(I$10,576.9km^2$) 대비 종 분포면적의 0~20% 1점, 21~40% 1.5점, 41~60% 2점, 61~80% 2.5점, 81~100% 3점으로 분포등급을 평가한 뒤 생태교란종(14분류군) 및 산림침입종(181분류군)에 대한 가중치를 적용하여 관리우선순위를(I

• Journal of Electrodiagnosis and Neuromuscular Diseases
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• v.20 no.2
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• pp.98-105
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• 2018

Objective: To evaluate whether the increase of the amplitude of motor evoked potentials (MEPs) during surgery can imply favorable prognosis postoperatively in spinal cord tumor surgery. Method: MEPs were monitored in patients who underwent spinal cord tumor surgery between March 2016 and March 2018. Amplitude changes at the end of monitoring compared to the baselines in limb muscle were analyzed. Minimum and maximum changes were set to $MEP_{min}$ (%) and $MEP_{max}$ (%). Strengths of bilateral 10 key muscles which were documented a day before ($Motor_{pre}$), 48 h ($Motor_{48h}$) and 4 weeks ($Motor_{4wk}$) after the surgery were reviewed. Results: Difference of $Motor_{48h}$ from $Motor_{pre}$ ($Motor_{48h-pre}$) and $Motor_{4wk}$ from $Motor_{pre}$ ($Motor_{4wk-pre}$) positively correlated with $MEP_{min}$, suggesting that smaller the difference of MEPs amplitude, less recovery of muscle strength. There was a negative correlation between the amount of bleeding and $MEP_{min}$, indicating that the greater the amount of bleeding, the smaller the $MEP_{min}$, implying that MEPs amplitude is less likely to improve when the amount of bleeding is large. It also showed significant difference between patients with improved or no change of motor status and patients with motor deterioration after surgery according to anatomical tumor types. Conclusion: Improve of muscle strength was less when the increase of MEPs amplitude was small, and improvement of MEPs amplitude was less when the amount of bleeding was large. Correlation between changes of status of muscle strength after surgery and tumor types was observed. With amplitude increase in MEPs monitoring, restoration of muscle strength can be expected.

• Korean Journal of Plant Resources
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• v.35 no.1
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• pp.71-99
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• 2022

This study was conducted to investigate the vascular flora of Masan, located in Goseong-gun, Gangwon-do, and to comprehend the distribution of remarkable plants such as rare and Korea endemic plants and invasive alien plants. The survey was carried out the distribution of vascular plants 11 times per season from 2010 to 2018. A total of 619 taxa in 93 families, 328 genera, 529 species, 6 subspecies, 78 varieties and 6 forms were identified on mt. Masan. Among them, Korean endemic plants are 21 taxa including Saussurea diamantica Nakai and are plants designated by the Korea Forest Service are 20 taxa counting Saxifraga octopetala Nakai. Invasive alien plants were classified a total of 35 taxa inclusive of Trifolium pratense L. (WS), Aster pilosus Willd. (SS), Coreopsis lanceolata L. (SR), Rumex obtusifolius L. (SC) and Lindernia dubia (L.) Pennell (CS). The naturalization rate was 5% and the urbanization index was 10.0%, respectively. Although this study identified the diverse distribution of major plants such as rare and endemic plants around Masan, it was confirmed that invasive alien plants, which pose a great threat to forest biodiversity conservation and promotion, spread and distributed in a specific section Therefore, it is urgent to establish a conservation strategy and countermeasures.

• Korean Journal of Plant Resources
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• v.35 no.2
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• pp.169-182
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• 2022

This study was conducted to predict the distribution of rare·endemic plants (Sophora koreensis Nakai) in the border forests where wildfire damage occurred and to quantify the damage. For this purpose, we tried to derive more accurate results through forest area damage (NBR) according to the Burn severity of wildfires, damage by tree species type (Vegetation map), and MaxEnt model. For Burn severity analysis, satellite imagery (Landsat-8) was used to analyze Burn severity (ΔNBR2016-2015) and to derive the extent of damage. To prepare the Vegetation map, the land cover map prepared by the Ministry of Environment, the Vegetation map prepared by the Korea Forest Service, and the vegetation survey conducted by itself were conducted to prepare the clinical map before and after the forest fire. Lastly, for MaxEnt model analysis, the AUC value was derived by using the habitat coordinates of Sophora koreensis Nakai based on the related literature and self-report data. As a result of combining the Maxent model analysis data with the Burn severity data, it was confirmed that 45.9% of the 44,760 m² of habitat (predicted) area of Sophora koreensis Nakai in the wildfire damaged area or 20,552 m², was damaged.

• Journal of the Korean Society of Radiology
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• v.81 no.5
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• pp.1134-1150
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• 2020

Various types of tumors and tumor-like lesions may affect the pancreas. Among them, pancreatic ductal adenocarcinoma is the most common and is generally referred to as "pancreatic cancer." Recently, the detection rates of rare pancreatic tumors and tumor-like lesions have increased owing to technological advancements and increased frequency of imaging tests. Considering that rare pancreatic tumors and tumor-like lesions differ from pancreatic ductal adenocarcinoma in terms of the treatment plan and prognosis, the differential diagnosis of these diseases is clinically relevant. Various imaging tests play an important role in the differential diagnoses of rare tumors, such as acinar cell carcinoma and schwannoma, tumor-like lesions, such as autoimmune pancreatitis and inflammatory pseudotumor, and pancreatic ductal adenocarcinoma, but accurately distinguishing these diseases solely based on imaging findings is difficult. The aim of this pictorial review was to present the imaging findings of rare pancreatic tumors and tumor-like lesions and discuss important points for the differential diagnosis.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2010.10a
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• pp.174-178
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• 2010

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2010.10a
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• pp.179-184
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• 2010

• TTA Journal
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• s.132
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• pp.116-117
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• 2010

강원도 양양 일대 폐(廢) 철광석 광산에 희소 광물인 희토류가 매장되어 상업 생산에 착수한다는 소식이다. 매장량이 매우 적은 희소금속의 하나로, 워낙 희귀해 세분화조차 번거로워 붙여진 이름, 희토류, 희토류로 촉발된 '보이지 않는 전쟁'을 생각할 때, 부존자원이 빈약한 우리나라 땅에서 전해진 이 새로운 가능성은 반가울 수밖에 없다. 희토류는 전기자동차와 풍력발전기, LCD, 미사일 등을 만드는 핵심 원료이다.