• 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.

• Journal of Ecology and Environment
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• 제44권2호
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• pp.106-114
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• 2020

Background: Determining patterns of habitat use is key to understanding of animal ecology. Approximately 1% of bird species use brood parasitism for their breeding strategy, in which they exploit other species' (hosts) parental care by laying eggs in their nests. Brood parasitism may complicate the habitat requirement of brood parasites because they need habitats that support both their host and their own conditions for breeding. Brood parasitism, through changes in reproductive roles of sex or individual, may further diversify habitat use patterns among individuals. However, patterns of habitat use in avian brood parasites have rarely been characterized. In this study, we categorized the habitat preference of a population of brood parasitic lesser cuckoos (Cuculus poliocephalus) breeding on Jeju Island, Korea. By using compositional analyses together with radio-tracking and land cover data, we determined patterns of habitat use and their sexual and diurnal differences. Results: We found that the lesser cuckoo had a relatively large home range and its overall habitat composition (the second-order selection) was similar to those of the study area; open areas such as the field and grassland habitats accounted for 80% of the home range. Nonetheless, their habitat, comprised of 2.54 different habitats per hectare, could be characterized as a mosaic. We also found sexual differences in habitat composition and selection in the core-use area of home ranges (third-order selection). In particular, the forest habitat was preferentially utilized by females, while underutilized by males. However, there was no diurnal change in the pattern of habitat use. Both sexes preferred field habitats at the second-order selection. At the third-order selection, males preferred field habitats followed by grasslands and females preferred grasslands followed by forest habitats. Conclusions: We suggest that the field and grassland habitats represent the two most important areas for the lesser cuckoo on Jeju Island. Nevertheless, this study shows that habitat preference may differ between sexes, likely due to differences in sex roles, sex-based energy demands, and potential sexual conflict.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2001년도 학술발표대회논문집
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• pp.105-112
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• 2001

The purpose of this study is to provide the fundamental data for the "Habitat Houses". The sample consisted of 24 residents who live in Kwang-yang and 47 residents in Asan. Through the personal interview and questionnaire survey, investigated the opinion of "Habitat"of Habitat Houses′residents. The data were analyzed by using spss program. The major findings were summarized as follows : The Habitat residents are low-income families, so this study is suggest. First, Habitat Houses are to locate near the city, second, to reduce the work time of residents. Third, Habitat must development the educationing program for residents. Fourth, Habitat must development management program and must repair the claim.

• Spatial Information Research
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• 제8권1호
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• pp.85-99
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• 2000

보호동물사에 대한 서식지 분포정보는 개발압력이 심한 우리나라에서는 서식지 관리에 있어 매우 중요하다. 본 연구는 GIS와 로지스틱 회귀분석을 이용하여 멧돼지의 서식지 적합성모형을 개발하여 서식지 분포도를 작성하고 본 연구의 결과를 토대로 현재 우리나라의 멸종위기종과 야생동물보호종들의 서식지 관리를 위한 기초를 마련하고자한다. 서식지 모형을 구현하기 위한 연구내용 및 방법은 다음과 같다. 첫째, 멧돼지의 서식지 특성을 파악하기 위하여 GIS 자료를 구축하였다. 멧돼지의 위치파악을 위해 원격무선측정기법과 GPS를 이용하였다 둘째, 멧돼지의 서식지 이용과 유용성에 영향을 미치는 환경인자를 파악하기위해 원격무선측정기법과 GPS를 이용하였다. 둘째, 멧돼지의 서식지 이용과 유용성에 영향을 미치는 환경인자를 파악하기 위해 χ²검정(Chi-square test)을 실시하였다. 마지막으로, 최적 서식지의 분포를 예측하기위한 서식지 적합성모형 개발을 위해 로지스틱 회귀분석을 이용하였다. 본 연구의 결과는 다음과 같다. 첫째, 멧돼지의 서식지 이용특성 분석의 결과, 성별 그리고 활동유형별에서는 뚜렷한 차이를 볼 수 없으나, 계절별 그리고 서식지 유형별에서는 서식지 이용특성의 차이가 뚜렷한 것을 볼 수있었다. 둘째, 서식지 유용성 분석의 결과 멧돼지의 서식환경에 영향을 미치는 자연적인 환경요인으로 표고, 향, 임상 그리고 영급이 유의성이 있는 인자로 나타났다. 반면에, 경사, 능선/계곡 , 물 그리고 일사량의 경우 통계적 유의성이 적어 전반적으로 서식지를 결정하는 환경인자라고 볼 수 없었다. 마지막으로, 개발된 서식지 적합성모형의 결과 예측확률 0.5를 기준으로 전제서식지는 75.00%, 커버서식지는 84.26% 의 높은 분류정확도를 나타내었다. 모형검증의 결과 대상지 내부의 경우 전체서식지가 75.00%로 나타나 본 모형이 신뢰성이 있는 것으로 판단되었다.

• Ecology and Resilient Infrastructure
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• 제3권2호
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• pp.134-142
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• 2016

기후변화에 의한 온도 상승 및 강수량 변화는 수량 및 수질을 포함한 수환경의 변화로 이어져 결과적으로 수생생물의 서식지에 영향을 미친다. 이와 같은 서식지 변화는 생물종의 서식적합도 변화로 이어지고, 서식적합도에 의해 종분포가 결정된다. 따라서 기후변화에 의한 담수 어류의 서식적합성 변화를 예측하기 위하여 기존의 서식적합성 모형을 비교 및 분석하였다. 서식적합성 모형은 PHABSIM, CCHE2D, CASiMiR, RHABSIM, RHYHABSIM, River2D과 같은 서식지-수리 모형과 CLIMEX와 같은 서식지-생리 모형으로 구분하여 조사하였다. 서식지-수리 모형들은 수리학적 인자 (유속, 수심, 기질)를 이용하여 서식적합도를 예측하기 때문에, 수온을 포함한 수질의 영향을 평가할 수 없다. 반면, CLIMEX는 기후 인자에 대한 생물의 생리학적 반응을 평가하기 때문에, 물리적 서식지 (수리학적 인자)의 영향을 평가할 수 없다. 이러한 문제를 해결하기 위하여 서식지-수리 모형인 PHABSIM과 서식지-생리 모형인 CLIMEX의 구동 원리를 융합하여 기존의 모형들보다 다양한 환경 인자에 대한 영향을 예측할 수 있는 새로운 모형인 생태학적 서식적합성 모형 (EHSM)의 개념을 제안하였다. 이 모형은 기후변화에 의한 어류의 서식적합도 변화를 더욱 정확하게 예측할 수 있을 것으로 기대된다.

• 환경생물
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• 제40권3호
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• pp.307-315
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• 2022

본 연구에서는 서식지 질적 평가에 대한 추진체계를 6단계로 구분하고, 평가 대상지 선정 방법과 서식지 질적 평가 항목을 제시하였다. 서식지 질적 평가 항목은 서식지의 건강성, 안정성, 단절화 및 파편화 정도, 서식지 적합성, 위협 정도 등에 대한 종합적인 평가가 가능하도록 구성되었다. 그러나 현시점에서는 자료부족으로 인하여 서식지 질적 평가 체계가 적용 가능한 멸종위기종이 극히 일부에 해당된다. 서식지 질적 평가 체계는 향후 멸종위기종들에 관한 서식환경자료가 축적되고 이를 기반으로 평가항목들에 대한 정량적 기준 및 가중치가 부여되면 멸종위기종별 주요 서식지에 대한 보전방안 마련에 크게 기여할 것으로 기대된다.

• Ocean and Polar Research
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• 제35권4호
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• pp.395-405
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• 2013

The aim of this study is to suggest an optimal survey method for coastal habitat monitoring around Weno Island in Chuuk Atoll, Federated States of Micronesia (FSM). This study was carried out to compare and analyze differences between in situ survey (PHOTS) and high spatial satellite imagery (Worldview-2) with regard to the coastal habitat distribution patterns of Weno Island. The in situ field data showed the following coverage of habitat types: sand 42.4%, seagrass 26.1%, algae 14.9%, rubble 8.9%, hard coral 3.5%, soft coral 2.6%, dead coral 1.5%, others 0.1%. The satellite imagery showed the following coverage of habitat types: sand 26.5%, seagrass 23.3%, sand + seagrass 12.3%, coral 18.1%, rubble 19.0%, rock 0.8% (Accuracy 65.2%). According to the visual interpretation of the habitat map by in situ survey, seagrass, sand, coral and rubble distribution were misaligned compared with the satellite imagery. While, the satellite imagery appear to be a plausible results to identify habitat types, it could not classify habitat types under one pixel in images, which in turn overestimated coral and rubble coverage, underestimated algae and sand. The differences appear to arise primarily because of habitat classification scheme, sampling scale and remote sensing reflectance. The implication of these results is that satellite imagery analysis needs to incorporate in situ survey data to accurately identify habitat. We suggest that satellite imagery must correspond with in situ survey in habitat classification and sampling scale. Subsequently habitat sub-segmentation based on the in situ survey data should be applied to satellite imagery.

• 환경영향평가
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• 제22권3호
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• pp.277-290
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• 2013

This study was carried out to propose the new procedure to apply Habitat Evaluation Procedure(HEP) of target species using delphi technique, which is suitable to develop endangered species with few researches and ecological knowledges. To identify habitat quality of specific species in development project site, we can develop habitat model and create habitat suitability maps. In this study, we select the Common Kestrel(Falco tinnunculus) as target species in four areas(Paju, Siheung, Ansan, Hwaseong) which is located near the Seoul metropolitan area. The Delphi technique was selected to get the reliable information on the species and habitats requirements. Through the delphi approach, seven habitat components were determined as suitable variables for the Common Kestrel: density($n/km^2$) of small mammals, area($km^2$) of bare-grounds, pasturelands and riparian, and open area(%), spatial distribution and area of croplands, landscape diversity, breeding sites(tall trees, cliffs, high-rise buildings), and the length of shelf. Habitat variables used in this model were classified into two categories: % of suitable land-cover type(open areas, croplands, pasturelands, wetlands, and baregrounds) and the quality of feeding sites(within 250m from edges of woodlands). Habitat quality of the Common Kestrel was assessed against occurred sites derived from the nationwide survey. Predicted habitat suitability map were closely related to the observed sites of the endangered avian species in the study areas. With the habitat suitability map of the Common Kestrel, we assess the environmental impacts with habitat loss after development project in environmental impact assessment.

• 한국환경복원기술학회지
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• 제13권6호
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• pp.161-172
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• 2010

As the interest on biodiversity has increased around the world, researches about evaluating potential for habitat are also increasing to find and comprehend the valuable habitats. This study focus on comprehending the significance of stream in evaluating habitat's potential. The purpose of this study is to evaluate habitat potential with applying stream as a main variable, and to comprehend the relationship between the variables and habitat potential. Basin is a unit that has hydrological properties and dynamic interaction with ecosystem. Especially, biodiversity and suitability of habitat in basin area has direct correlation with stream. Existing studies also are proposing for habitat potential evaluation in basin unit, they applied forest, slope and road as main variables. Despite stream is considered the most important factor in basin area, researchers haven't applied stream as a main variable. Therefore, in this study, three variables that can demonstrate hydrological properties are selected, which are, riparian distance, stream order and land use disturbance, and evaluate habitat potential. Habitat potential is analyzed by using Maxent (Maximum entropy model), and vertebrate's presence data is used as dependent variables and stream order map and land cover map is used as base data of independent variables. As a result of analysis, habitat potential is higher at riparian and upstream area, and lower at frequently disturbed area. Result indicates that adjacent to stream, upstream, and less disturbed area is the habitat that vertebrate prefer. In particular, mammals prefer adjacent area of stream and forest and reptiles prefer upriver area. Birds prefer adjacent area of stream and midstream and amphibians prefer adjacent area of stream and upriver. The result of this research could help to establish habitat conservation strategy around basin unit in the future.

• 환경생물
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• 제21권4호
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• pp.337-341
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• 2003

Habitat heterogeneity can enhance biological diversity by providing variation in structural diversity. This paper reviewed heterogeneous habitat serves as a population stability and superior demographic performance (e.g., high density, survivorship, reproductive rate) can be observed compared with organisms with inferior demographic performance. The idea of habitat variation has been further developed in modelling. Furthermore the size and configuration (distribution) of a patch (of a particular habitat type) become effective for the stability of population through hiding places and food resources. Species diversity is related to habitat complexity that provides structural diversity to ground -dwelling organisms. Finally coarse woody debris can enhance habitat complexity thus stabilizing population fluctuation and increasing survivorship.