• 환경영향평가
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• 제22권5호
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• pp.491-511
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• 2013

In this study, three survey areas in Changnyeong, Miryang and Jinju of the confirmed the habitation of nutria and carried out the performance on the plant diet resource. From the habitat trace survey in the nutria habitat, a total of 336 trace points was shown. There were 181 trace points (54%) confirmed from St. 1 as the highest showing, followed by 52 trace points (15.4%) from St. 2, and 103 trace points (30.6)% from St. 3. The vascular plants distributed in the habitat area were a total of 182 taxonomic group with 57 families, 99 genus, 16 hybrids, and 1 race. The vascular plant living types in the habitat area are 1-year plant (Th, Th(w)) for 63class groups (34.6%), hemicryptophyte (H) for 42class groups(23.1%). plants, trees, crop plants were included. As a result of analyzing the overseas research cases on the diet plants of nutria, there are 195 taxonomic groups in a total of 39 families, 126 genus, 183 breeds, and 12 hybrids. In the study areas, feeding the plants was confirmed by the 7 taxonomic groups, aquatic plant, terrestrial From the total of 182 taxonomic groups discovered in the habitat area, 20 class groups, in 3 habitation region, 10 class groups of commonly appearing 49 class groups were shown to be the breed confirmed for diet in existing case studies, and assuming from it basis, the nutria habitating in the survey area is considered to have the supply of diverse diet resource to have flawless habitation. This is implication of having potential breeding possibility.

• Spatial Information Research
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• 제10권4호
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• pp.501-513
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• 2002

Eurasian otter (Lutra lutra) is one of endangered wildlife species whose population size is declining in Korea. To manage and conserve habitat for Eurasian otter, it is crucial to understand which habitat components affect otter habitat qualities. The objectives of this study were to develop a habitat suitability model of Eurasian otter in Soraksan National Park, to validate the model in Odaesan National Park. The research methods of this study were as follows. First, trace data and characters of Eurasian otter habitat were collected with Geographic Information System (GIS) data and Global Positioning System (GPS) receivers between 2000 and 2002. Second, the habitat use factors were identified as habitat characteristics of Eurasian otter and classified with habitat use and availability analyses. Third, significant factors of habitat model were extracted by Chi-square test. The last, Eurasian Otter Habitat Suitability Model (EOHSM) was employed by logistic regression method. Otter habitat use was positively associated with the reeds and shrubs areas adjacent to streams, the size of boulders, and low human disturbance in Soraksan National Park by EOHSM. This model had a classification accuracy of 74.4% at cutoff value of 0.5. Model validation showed a classification accuracy of 86.6 % at cut off value of 0.5 for otter habitat in Odaesan National Park.

• 한국조경학회지
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• 제32권4호
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• pp.28-38
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• 2004

Korean goral (Nemorhaedus caudatus raddeanus) is one of the endangered species in Korea, and the rugged terrain of the Soraksan National Park (373㎢) is a critical habitat for the species. But the goral population is threatened by habitat fragmentation caused by roads and hiking trails. The objective of this study was to develop a potential habitat suitability model for Korean goral in the park, and the model was based on the concepts of fuzzy set theory and multi-criteria evaluation. The process of the suitability modeling could be divided into three steps. First, data for the modeling was collected by using field work and a literature survey. Collected data included 204 points of GPS data obtained through a goral trace survey and through the number of daily visitors to each hiking trail during the peak season of the park. Second, fuzzy set theory was employed for building a GIS data base related to environmental factors affecting the suitability of the goral habitat. Finally, a multiple-criteria evaluation was performed as the final step towards a goral habitat suitability model. The results of the study were as follows. First, characteristics of suitable habitats were the proximity to rock cliffs, scattered pine (Pinus densiflora) patches, ridges, the elevation of 700∼800m, and the aspect of south and southeast. Second, the habitat suitability model had a high classification accuracy of 93.9％ for the analysis site, and 95.7％ for the validation site at a cut off value of 0.5. Finally, 11.7％ of habitatwith more than 0.5 of habitat suitability index was affected by roads and hiking trails in the park.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제4권1호
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• pp.9-15
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• 2023

We analyzed data of endangered mammals in the 1st grade zone of the Ecological and Natural Map of Korea that were obtained through 202 field surveys over six years. Five endangered mammal species were identified including otters, long-tailed gorals, martens, leopard cats, and flying squirrels. The total number of habitat traces collected was 918, of which 897 traces (97.7%) were excrement types. The total surveyed distance was 697.7 km and there were 2,184 grids of 250×250 m each. Of these grids, 441 or 20.2% were confirmed as habitats of endangered mammals. Moreover, we analyzed results of repeated surveys in the same area by converting them into individual one-time surveys, accounting for 23.1% of the total area. The flying squirrel showed a low correlation with the frequency of field surveys but showed many habitats in a specific season. Leopard cats and martens were correlated with the frequency of field surveys. Results of analysis confirm that the grid method used for establishing the Ecological and Natural Map is unsuitable for the habitat division of flying squirrels, otters, leopard cats, and martens, and it does not reflect the actual habitats of these four species. Therefore, we propose that the concept of the habitat grid of species must be reevaluated and improved, specifically for endangered mammals.

• 한국환경복원기술학회지
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• 제23권5호
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• pp.45-58
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• 2020

This study was conducted to comprehend the spatial distribution characteristics, habitats and appearances of Hydropotes inermis by using the biotope mapping in Daebudo Island, Ansan-si. The result is base data to understand status and manage potential inhabitation of Hydropotes inermis in Daebudo Island through the Maximum Entropy model. The study used 105 traces from the primary investigation and 452 traces in the secondary investigation. The biotope types were distinquished Hydropotes inermis habitats largest from the order of natural forest (15.1%), natural coast (13.7%), marshy cultivated land (12.6%), and dry cultivated land (11.7%), and from the inhabitation trace results. Hydropotes inermis appearanced biotope types were the greatest in the order of cultivated land (49.73%) > forest (18.85%) > coast (7.00%) > grassland (6.28%). Since forests in Daebudo Island have low slope and altitude, it was concluded that Hydropotes inermis would live in most of the forests. A high number of Hydropotes inermis was found to appear in areas where the grassland is formed including cultivated lands (include unused paddies and fields) and marshy grasslands, which would result in direct damage of crops. According to the Maxent modeling analysis that used location information of Hydropotes inermis, the AUC value was 0.635 based on the ROC curve. In Daebudo Island, areas with over 0.635 potential inhabitation value are distributed all over the place, and it was concluded that each population would have a different scope of influence and home range. Hydropotes inermis living in Daebudo Island have high habitat suitability mainly around the cultivated lands near the roads, but due to the bare lands and roads, it is expected that their habitats would be fragmented and damaged, which would have a direct and indirect effect in maintaining the Hydropotes inermis population. Also, considering habitat disturbance, diverse methods for reducing damage including capturing some individuals within the limit that does not disperse Hydropotes inermis population in Daebudo Island must be carried out.

• 환경생물
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• 제24권1호
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• pp.89-94
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• 2006

본 연구는 수달의 배설물에 근거해 한국 수달의 서식지 분포 및 그 패턴을 유추하기 위하여 수행되었다. 본 연구에서 분포 조사에 사용한 총 750개의 조사 격자 (13.75X11\;km) 중 34%에 이르는 255개의 구획에서 수달의 배설물이 존재한다는 것을 확인하였다. 수달 배설물의 지역적 분포 빈도는 경상북도(49.62%), 강원도 (49.56%), 충청북도 (41.67%), 경상남도 (38.00%), 전라북도 (37.93%), 전라남도 (24.24%), 충청남도 (20.29%), 경기도(7.36%)순이었다. 수달의 배설물이 발견된 대부분 지역에서 아주 적은 수(평균 1.7 spraints/sprainting site)의 배설물만을 확인하였으므로 지역별 개체군의 크기는 크지 않은 것으로 추정된다. 수달의 배설물에 근거해 유추한 수달 서식지의 분포 패턴은 한국에 서식하는 수달의 보전 및 관리를 위한 기초 생태자료로써 중요한 기여를 할 것으로 사료된다.

• 한국환경생태학회지
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• 제27권5호
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• pp.544-549
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• 2013

본 연구는 2009년 3월부터 6월까지 강원도 원주시 신림면 구학리 지역에서 하늘다람쥐 둥지 및 배설물 흔적을 조사하였다. 조사지역 내의 하늘다람쥐의 흔적은 총 30개소에서 확인되었으며, 이 중 둥지가 15개소, 배설물 흔적이 15개소였다. 이 중 둥지 이용이 직접 확인된 개체는 총 3개체로 나무 구멍 둥지 1개소에서 1쌍의 하늘다람쥐를 확인할 수 있었으며, 소나무에 만들어진 나무 위 둥지에서 1개체를 확인할 수 있었다. 하늘다람쥐가 이용한 둥지의 수종은 일본잎갈나무를 주로 이용하였으며, 소나무, 물박달나무, 때죽나무, 층층나무, 고로쇠나무를 선호하는 것으로 나타났다. 배설지로 이용하는 수종은 산벚나무, 층층나무, 졸참나무, 단풍나무, 신갈나무, 물박달나무 등으로 확인되었다. 둥지는 주로 조림지 내의 침엽수 계통을 주로 이용하며, 배설지는 주로 활엽수에서 확인되었다.

• 환경생물
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• 제38권1호
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• pp.1-15
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• 2020

본 연구는 침입종 사향쥐의 국내 자연생태계 정착 여부를 확인하였다. 아울러 관리전략 수립과 현장 관리에 필수적인 관리대상지역과 기초적인 행동특성 정보, 서식지 이용에 관한 자료를 제공하고자 하였다. 이를 위해 해외의 사향쥐 관리 동향을 파악하여 정착 단계에 따른 관리 방향을 검토하였다. 그리고 국내 72개 사육농가의 위치정보를 확보하였고, 실태조사를 통해 경기도, 충청남도, 경상북도, 세종특별자치시 소재 5개 지역을 자연 유출 가능성이 높은 지역으로 제시하였다. 또한, 2016년부터 2018년까지 3년간 동일 지점에 서식하는 개체를 모니터링하였다. 2018년 모니터링 지역에서 포획한 개체의 연령이 1.2년생으로 확인되었으며, 2012년 이후 해당지역에 추가적인 개체 보충이 없었다는 사실에 근거하여 국내 자연생태계에 사향쥐가 정착한 것으로 판단하였다. 국내 자연에 정착한 사향쥐는 0.0027 ㎢ (MCP 95%)의 작은 행동권을 나타내었으며, 봄철과 가을철 규칙적인 이동성을 보이는 것으로 나타났다. 사향쥐의 서식이 관찰된 지역은 서식환경의 교란이 높게 발생한 지역이었으며, 사향쥐의 흔적 출현 빈도는 부엽식물과 부유식물의 생육이 왕성한 개방수역과 개체의 은신처로 활용 가능한 습생목본 식생유형에서 높게 확인되어 이들의 생태적 특성과 섭식 습성이 그대로 반영되었다. 국제적인 침입종 사향쥐가 국내 생태계에 정착하였고, 향후 확산이 우려되는 만큼 정부 차원의 선제적 대응과 과학적 관리를 위한 필수 자료 구축이 검토될 필요가 있다.

• 환경생물
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• 제23권3호
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• pp.315-321
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• 2005

The population of river otter (Lutra lutra) has been declined most of the world due to hunting, habitat destruction and indirect or direct influences of eutrophication, acidification and toxic chemicals. This study is conducted to identify the population decline of river otter in Korea with relation to environmental pollution caused by accumulation of heavy and flared metals. The field survey was conducted during Jan~Dec, 2004 at a monthly basis by collecting spraints. A total of 228 spraints were collected and analysis was done by ICP-AES. The concentrations of fourteen metals (Cr, Zn, Cd, Pb, Ni, Fe, Co, Mn, Mg, Cu, Al, Ba Hg, As) have been determined. Annual concentrations of Cd $(1.38{\mu}g\;g^{-1}),\;Zn\;(599.06\;{\mu}g\;g^{-1}),\;Pb\;(5.54\;{\mu}g\;g^{-1})$ at Gucheon were higher than those of Yeonchocheon. Concentrations of $Cr\;(5.01{\mu}g\;g^{-1}),\;Ni\;(1.91{\mu}g\;g^{-1}),\;Co\;(0.25{\mu}g\;g^{-1})$ were higher at Yeonchocheon. Most metals in winter were significantly increased (P<0.05) as season progressed from spring to winter. $Pb\;(15.58{\mu}g\;g^{-1}),\;Cu\;(15.15{\mu}g\;g^{-1}),\;a;Guchoen\;and\;Cr\;(5.77{\mu}g\;g^{-1})$ at Yeonchocheon were high in the downstream of winter.

• 한국환경생태학회지
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• 제27권3호
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• pp.316-326
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• 2013

본 연구에서는 3년간(2010~2012년) 뉴트리아의 전국적인 확산과 분포 흐름을 확인하고 서식 현황을 조사하였다. 2010년 9개 시 군에 분포하는 것으로 파악된 뉴트리아는 2012년 조사 결과, 13개 시 군에서 서식하는 것으로 나타났으며, 뉴트리아의 서식 흔적 조사에서 확인된 629개의 지점 중 95.9%의 흔적지점이 부산 경남지역을 중심으로 확인되었다. 부산 경남지역의 5개 행정구역 내 위치한 6개 조사구역을 서식지 유형별로 구분하여 개체 밀도를 조사한 결과, 2010년 3.89(${\pm}2.56$)개체/100m, 2011년 2.90(${\pm}2.69$)개체/100m, 2012년 1.39(${\pm}0.66$)개체/100m의 개체 밀도를 확인하였다. 조사기간 동안의 서식지 유형별 평균 개체밀도는, 소택형 습지 조사지역 3.48(${\pm}2.15$)개체/100m, 하천 조사지역 1.01(${\pm}0.25$)개체/100m, 하천형 습지 조사지역 3.69(${\pm}2.83$)개체/100m로 나타났다. 2010년부터 2012년까지 3년간 조사구역의 연간 평균 개체 밀도는 매년 감소하는 경향을 보였으며, 하천이 습지에 비해 뉴트리아 평균 개체 밀도가 낮게 나타났다. 현재 뉴트리아는 국내의 습지, 하천, 강 등 다양한 환경에 적응하여 서식하고 있으며 특히, 습지와 같이 서식에 유리한 환경이 조성된 지역에서는 급속한 밀도의 증가를 보일 수 있다. 과밀 지역에 서식하는 뉴트리아는 타 지역으로의 확산 가능성을 지니고 있으므로 생태적인 특성을 적용한 효율적인 관리방안의 수립이 필요하다.