• Journal of Wetlands Research
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• v.14 no.1
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• pp.101-120
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• 2012

We investigated the ecological characteristics of Jilmoe-neup conservation area which is one of wetlands designated as a Ramsar convention site in Mt. Odae from 2007 to 2011. Average out-flow of water was 0.80 $m^3/min$ during observation period. Average pH of water was 6.1, electric conductivity was 19 ${\mu}S/cm$ and contents of potassium, calcium and ammonium, nitrate and available phosphorus in water were recorded below average 2.0 mg/L. Peat layer was less developed than in other montane wetlands such as Yong-neup and Wangdeungjae-neup. Plants were recorded as 49 family, 118 genus, 163 species, 3 subspecies, 29 variety and 6 forma, total 163 taxa. Trientalis europaea L., which was designated in endangered level 2 by Ministry of Environment, inhabited at Sphagnum dominated area and Carex tussocks. Vegetation analysis showed that dominance value was changed as species distribution area were increased or decreased periodically. Although Jilmoe-neup deserved conservation value for Sphagnum fen which has diverse flora, it was affected from various factors such as ranch in the vicinity. Therefore, it must be monitored and managed continuously.

• The Journal of the Acoustical Society of Korea
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• v.36 no.6
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• pp.401-406
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• 2017

This paper presents the performance assessment of several key algorithms conducted for amphibian species sound classification. Firstly, 9 target species including endangered species are defined and a database of their sounds is built. For performance assessment, three feature vectors such as MFCC (Mel Frequency Cepstral Coefficient), RCGCC (Robust Compressive Gammachirp filterbank Cepstral Coefficient), and SPCC (Subspace Projection Cepstral Coefficient), and three classifiers such as GMM(Gaussian Mixture Model), SVM(Support Vector Machine), DBN-DNN(Deep Belief Network - Deep Neural Network) are considered. In addition, i-vector based classification system which is widely used for speaker recognition, is used to assess for this task. Experimental results indicate that, SPCC-SVM achieved the best performance with 98.81 % while other methods also attained good performance with above 90 %.

• Korean Journal of Ecology and Environment
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• v.51 no.2
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• pp.168-173
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• 2018

Mauremys reevesii is a Korean endemic turtle, and designed as an endangered species and national monument in South Korea. Recently, the population of the species has been dramatically declining because of habitat destruction, pollution and illegal capture. Moreover, small population size, difficulty of securing individuals, and lack of research are factors that impede the effective management of the species. In this study, we tested the effect of individual breeding and feeding on the seven juveniles of M. reevesii. Our results showed individual breeding and feeding were guaranteed the effective growth and development. Noticeable growth was confirmed in both body weight and carapace length. Moreover, the size difference among the individuals appeared at the start of this study decreased at the end of this study. Artificial breeding during the wither season was not caused disorders on the growth, behavior and morphology. This individual breeding may lead to effective growth and development, and it will be a way to increase the survival rate when the juveniles released into the wild.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.6-11
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• 2009

최근 경제발전과 산업화를 통한 도시화로 인하여 많은 자연하천이 심하게 훼손되고 있으며 도시하천의 경우 치수의 효율성을 강조한 하천정비를 실시함으로써 하천의 외경은 깨끗하게 바꾸어 놓았지만 그로 인한 하천생태계의 파괴가 문제점으로 대두되고 있다. 이에 따라 생태적으로 훼손된 하천의 생태복원이 최근 들어 활발히 추진되고 있으며 하천변의 식물 및 어류 등 다양한 생물에 대한 서식공간의 마련이 주요 이슈로 연구되어지고 있다. 본 연구에서는 2차원 수리서식모형인 River2D를 대표적인 도시하천인 대전천에 적용하여 대전천의 멸종위기에 처해 있는 감돌고기 및 우점종인 피라미를 대상으로 대상 어류의 서식처 제공을 위한 수리학적 분석을 시도하였다. 또한 자연친화적 서식처 개선 공법으로서 거석을 하도 내에 배치함에 따른 가중가용면적의 변화를 비교 검토하였으며 감돌고기를 위한 최적의 서식처 개선 방안을 제시하였다. 현재 상태의 대상하천에 대한 어류서식처를 모의분석한 결과, 현재 직선화되고 단조로운 하천흐름은 피라미의 서식환경에 적합한 것으로 나타났으며 가중가용면적의 경우 감돌기에 비하여 피라미가 약 20배정도 크게 나타났다. 어류서식처 조성공법의 WUA를 산정한 결과 V형 여울공법이 감돌고기의 서식환경을 360%, 징검다리 거석공법이 60%, 외톨이 거석공법이 8%이상 상승시키는 것으로 나타났다. 반면, 거석(Boulder)을 적절히 배치하여 서식처를 개선하는 방법의 경우에도 거석간 간격을 3.5m로 하여 배치하는 경우가 가장 효율적인 것으로 나타났으며 거석을 이용한 여러 가지의 배치형태 중에서 수류를 중앙으로 집중시켰을 때 감돌고기의 서식처가 급격하게 상승하는 것으로 나타났다. 따라서 하도 내 거석의 배치시 하도 및 대상어종의 특성을 고려하여 적절한 배치간격 및 배치방법을 연구하여 시행되어야 할 것이다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.18 no.1
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• pp.45-49
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• 2015

Disturbance to marine wildlife is a serious negative impact of marine debris. In this study, the percentages of Black-faced Spoonbill nests that included plastic marine debris were calculated from surveys conducted on an islet named Suhaam off the western coast of South Korea. The percentages of nests including plastic decreased from 71% in 2010 to 37% in 2011 to 33% in 2012. The total number of nests increased from 28 in 2010 to 38 in 2011 to 43 in 2012. These differences in nests and nesting materials were possibly due to natural nesting materials such as tree branches and rice straws that were provided at the breeding site as a protective action in 2011 and 2012. Additional conservation efforts should be made to prevent further negative impacts from marine debris.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.42 no.6
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• pp.657-663
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• 2009

This paper reports the strandings of sea turtles on Korean shores monitored for the first time in 2008. A total of 19 sea turtles, consisting of 12 greens and 7 loggerheads, were recorded as stranded from the east coast to the south including Jeju Island. Reported strandings reached a peak in July and dominant area was Jeju Island. The curved carapace length of loggerhead sea turtles ranged 65-84.2cm and that of green sea turtles ranged 39.2-90cm, indicating most of them were immature to sub-adult. Out of 19 turtles, 11 were found dead with unknown reasons. Possible causes of death may include drawning by fishing gear, swallowing of marine debris, boat collision, and diseases. An immature green sea turtle tagged with a satellite transmitter spent winter near Jeju Island where it was released, suggesting that the Island provide immature greens a feeding ground. Considering thousands of sea turtles crawl on Japanese shores for nesting every year, the number of sea turtles reported in Korean waters was relatively small. Therefore, it is suggested that an appropriate monitoring system be necessary to protect and conserve endangered sea turtle species in Korean waters.

• Korean Journal of Plant Taxonomy
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• v.45 no.3
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• pp.278-297
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• 2015

With the development of the internet and international agreements such as the Convention on Biological Diversity (CBD) and the Convention on International Trade in Endangered Species (CITES), Korean researchers frequently encounter scientific names of foreign species, and these are named on a case-by-case basis in Korean without any standard naming method. Therefore, standard Korean names for entire orders and families in the world are required for better communications in Korea. However, there have been no comprehensive discussions of the standardization of Korean names for the orders and families found in the world. In this study, we 1) compare the Korean names of orders and families in the references, 2) discuss naming methods in Korean for foreign taxa, and 3) then suggest standard Korean names for the orders and families in the APG III, which is an up-to-date angiosperm classification system. This study will be a starting point for the national standardization of Korean names for orders and families found throughout the world.

• Journal of Veterinary Clinics
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• v.31 no.4
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• pp.322-324
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• 2014

Candidiasis caused by Candida albicans is a localized mucocutaneous disease. It occurs worldwide in various kinds of animals. A 7-year-old male spotted seal weighing 98 kg showed facial skin lesions. The present case was characterized by erythematous, thickened, and alopecic skin lesions in the periocular region and on the commissure of the lower lip. For diagnosis, skin scraping and culture of samples from the facial skin lesions were done. Colonies were cream-colored and glistening after 3 days of culture on Sabouraud dextrose agar. Typical yeast-like cells were observed by microscopic inspection after Gram staining. Recovery was achieved with itraconazole (1 mg/kg SID) for 7 days, repeated three times at 2-week intervals.

• Korean Journal of Ecology and Environment
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• v.42 no.3
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• pp.394-403
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• 2009

The fish fauna and community structures were investigated at 15 stations in the midupper region of the Seomjin River watershed from August in 2008 to April in 2009. During the studying period, 42 species belonging to 11 families were collected. Dominant family in the all sites was Cyprinidae (28 species, relative abundance: 66.7%) during the study. Total of 42 species (primary freshwater: 40 species, peripheral freshwater: 2 species) were found with the primary freshwater fishes being the highest. Dominant species was Zacco platypus (22.3%), and subdominant species was Coreoferea herzi (10.8%). Also, Pseudogobio esocinus (9.0%) and Carassius auratus (5.8%) were numerous. There were 17 Korean endemic species (40.5%), including Rhodeus ocellatus, Acheilgnathus koreensis, A. somjinensis, Coreoleuciscus splendidus and Sarcocheillichthys variegatus wakiyae. Among them, Acheilgnathus somjinensis was identified for designation required to protect under a wildlife category. In conclusion, we could define that the Seomjin River watershed has a very good water conditions as habitat of fish.

• Korean Journal of Agricultural and Forest Meteorology
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• v.6 no.1
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• pp.1-10
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• 2004

The climate of Minamiakikawa forest in Japan is similar to that of Mt. Jiri in South Korea. There is a large development plan for Minamiakikawa forest, and a change in the species composition is expected. This study was initiated to compare forest transition caused by artificial perturbations in Korea and Japan. Long-term field observations on species composition are reported. We found 98 families, 231 genera, 315 species, 29 varieties, and 8 races, making a total of 352 classification groups of higher plants in the Minamiakikawa forest area. Among them, 11 families, 12 species and 2 varieties are rare or endangered. The study area is dominated by Cryptomerica japonica and Chamaecyparis obtusa. The time and restoration effects on secondary and latent forestation consider the development of the Quercus mongolica community, the Quercus serrata community, and deciduous-broadleaved tree ascension. This indicates that the forest has been restored to Abies firma, Pinus densiflora or Cryptomeria japonica and Fagus japonica, which is considered latent natural forestation of the area in a natural transfer.