• Title/Summary/Keyword: Habitat

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Comparison of potential food resources by barn swallow habitat type (제비 서식지 유형에 따른 잠재적 먹이원 비교)

  • Sung Hoon Choi;Seon-Deok Jin;Tehan Kang;Eun-Jung Kim;Joohyuk Yoon;Hong-Shik Oh
    • Korean Journal of Environmental Biology
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    • v.40 no.4
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    • pp.604-614
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    • 2022
  • This study analyzed habitat status of barn swallows within 800 m and changes in potential food resource occurrence for 63 nests (Seocheon 23, Sejong 40) where barn swallows breeding was confirmed in Seocheon and Sejong in 2019 and 2020. As a result of checking habitat compositions of barn swallows in the study area, Sejong showed more varieties of habitat types than Seocheon, showing a larger number of dominant groups. Such large number of dominant groups was found to be an advantageous habitat factor for producing flying insects as potential food resources for barn swallows. As for the production of potential food resources, Seocheon had the highest production in dwelling and stream and Sejong had the highest production in the stream. The production of potential food resources differed in production season by habitat type. This study analyzed compositions of the habitat around the breeding site of swallows. It provides basic data necessary for protecting barn swallow habitats by comparing the production timing and production volume of potential food resources occurring in the habitat.

Simulation of Change in Physical Habitat of Fish Using the Mobile Bed Model in a Downstream River of Dam (댐 하류 하천에서 하상변동 모델을 이용한 어류 물리서식처 변화 모의)

  • Kim, Seung Ki;Choi, Sung-Uk
    • Ecology and Resilient Infrastructure
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    • v.2 no.4
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    • pp.317-323
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    • 2015
  • This study investigated the impact of the morphological change on a physical fish habitat in the downstream reach of a dam using long-term mobile bed simulation. The quasi-steady model was used for hydraulic simulation and the habitat suitability index model was applied for physical habitat simulation. For simulating long-term morphological change of the stream bed, The Exner equation was used. Sorting of bed material was also considered. The results of simulation showed that erosion and armoring process occurred in a reach downstream of the dam and change of physical habitat for Zacco platypus followed. These results indicate that channel morphology and substrate conditions effected the physical habitat for considering long-term investigation.

Effects of habitat conditions in created wetlands on sustaining wintering waterfowl in riverine plains, Nakdong River, South Korea

  • Choi, Jong-Yun;Jang, Ji-Deok;Jeong, Kwang-Seuk;Joo, Gea-Jae
    • Journal of Ecology and Environment
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    • v.38 no.3
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    • pp.343-352
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    • 2015
  • The landscape setting of a habitat strongly influences the distribution, abundance, and species composition of waterfowl. Thus, habitat assessment is very important to understand the habitat characteristics that sustain waterfowl assemblages. In this study, we hypothesized that the excessive use of artificial materials when new wetlands are constructed negatively influences wintering waterfowl. To test this hypothesis, we measured environmental factors, assessed habitat, and investigated waterfowl at 13 artificial wetlands in the Nakdong River Basin. There were greater numbers of waterfowl species and individuals in artificial wetlands with high habitat assessment scores. In contrast, environmental factors did not affect waterfowl distribution. In particular, features of natural habitats, such as macrophytes and sandbars, and the surrounding land-use patterns were important factors for sustaining waterfowl assemblages in each created wetland. Our results show that promoting naturalness in wetlands and surrounding areas would increase the species diversity and abundance of waterfowl. Further, complex habitats, such as wetlands and some terrestrial habitats, support both aquatic and terrestrial species because mixed habitats feature a larger array of food sources than more limited habitats do.

Otter Habitat Analysis and Regional Development Strategies in Dadohae National Park Using GIS Techniques (GIS기법을 이용한 다도해국립공원의 수달 서식가능지 분석과 지역개발 정책에 관하여)

  • Chang, Eun-Mi;Park, Kyeong;Chae, Hee-Young
    • Spatial Information Research
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    • v.16 no.3
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    • pp.343-357
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    • 2008
  • Hongdo and Huksando belong to the Dadohae national park parks in Korea and are famous sightseeing spots in Shinahn-gun. One of the keystone species in this area is otter (Lutra lutra). We accomplished field works for finding its present habitat and condition analyses for the potential habitat in the area via spatial analyses with digital elevation model and satellite imagery. Isolated condition with coastal cliffs was one of the superior conditions over habitat in the main land, but the road kills of small animals were also observed. Three underground eco-corridors were suggested for the protection of otter habitat in the Shinahn-gun area. Regional development strategies of Shinahn-gun should be focused on the protection of safe and pristine habitat for otter population.

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Habitat Analysis of Hyla suweonensis in the Breeding Season Using Species Distribution Modeling (종분포모형을 이용한 수원청개구리의 번식기 서식지 분석)

  • Song, Wonkyong
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.18 no.1
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    • pp.71-82
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    • 2015
  • Hyla suweonensis is an endemic species and is designated as the only endangered species I among amphibians in 2012 by the Ministry of Environment, however studies about its habitat are lacking. This study was carried out to analyze habitat of H. suweonensis based on the spatial information using Maxent (Maximum entropy model as a species distribution model. We detected 45 present points until 2013 and 10 environmental variables by literature review for the model. The results showed that $429km^2$ (0.95%) of the study area, which was about 7.75% of the total agricultural area, was high possible habitats of H. suweonensis. The habitat of H. suweonensis was analyzed by over $1km^2$ rice paddy fields that were lower elevations, flat slopes, and not fragmented. The distance from forests and rivers was identified as a factor that affects its habitat possibilities. In order to conserve H. suweonensis, a large area of rice paddy fields should be preserved, and especially the area around forests and rivers would be required more intensive management. In addition, to compensate for degraded habitats of H. suweonensis in urban areas like as Suwon city, considering integrated watershed management strategy could be effective in the perspective of ecological habitat network of H. suweonensis.

Adaptation of Farm Field Transplanting and Growth Habitat of Artemisia capillaris in Korea (사철쑥의 내륙과 해안 자생지 생육과 포장 이식의 적응)

  • Song, Hong Seon;Kim, Seong Min
    • Korean Journal of Medicinal Crop Science
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    • v.21 no.1
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    • pp.49-53
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    • 2013
  • This study was performed to evaluate the adaptability of farm field soil transplanting and habitat growth in inland and seashore areas of Artemisia capillaris in South Korea. In habitat, Artemisia capillaris was distributed both in the inland and seashore area as hemicryptophyte, and it grows individually on the slope of the open sunlight. The inland and seashore soils of habitat was the slightly acid and weakly alkaline, respectively. Plant height was 55.6 cm, and it was higher in inland than that of the seashore area. The stem and branch number was less in inland than that of the seashore area. Flowering period was mid-August, and flower of inland blossomed early 1 ~ 3 days than that of the seashore area. The flowering and fruiting rate was slightly lower in inland than that of the seashore area. After transplanting of Artemisia capillaris, plant height was 71.7 cm, and it was higher 16.1 cm than that of the habitat. The stem and branch number was more than that of the habitat, and flower blossomed early 3 ~ 4 days than that of the habitat. Transplanting survival rate was 85.1%, it was slightly higher in inland than that of the seashore area.

Development of Green Network Plan Using Bird Habitat Evaluation Model -A Case Study of Seoul, Korea- (조류서식지 평가모형을 이용한 서울시 녹지네트워크 구상)

  • 차수영;박종화
    • Journal of the Korean Institute of Landscape Architecture
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    • v.27 no.4
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    • pp.29-38
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    • 1999
  • Present green space planning of Korea pay little attention to biodiversity conservation in urban areas. The quality of urban wildlife habitat has been deteriorated severely due to fragmentation and isolation of urban open spaces. The application of ecological corridors to urban green space planning and management can greatly enhance the bird habitat of Seoul. The objectives of this study were to evaluate bird habitat potential of existing urban parks of Seoul, and to investigate methods to develop ecological corridors for wild birds. This study consists of three parts. The first part is to construct bird species/habitat relationship model. The second part is to evaluate 207 urban parks of Seoul with the model. Based on the relative potential for bird habitat, urban parks of Seoul can be classified into cores, nodes, and points of the network. Outcomes of this part can also be used to enhance the quality of bird habitats by identifying limits or weakness of existing green spaces for bird habitat. The final part is to develop three green network plans; north-south network, the Han river network, and a district network for Kangnam-Gu.

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Site Assessment Using Habitat Suitability Index for Manila Clam Ruditapes philippinarum in Geunso Bay Tidal Flats (서식지 적합지수를 이용한 근소만 갯벌 바지락(Ruditapes philippinarum)의 어장적지평가)

  • Choi, Yong-Hyeon;Hong, SokJin;Jeon, Seung-Ryul;Cho, Yoon-Sik
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.52 no.5
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    • pp.511-518
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    • 2019
  • Evaluating the habitat suitability of potential aquaculture sites for cultured species is critical to the sustainable use of tidal flats. This study evaluated the habitat suitability index (HSI) of 12 sites in a tidal flat aquaculture farm at Geunso Bay, Taean, in June 2016. The parameters used to model the suitability index were Growth (water temperature, chlorophyll ${\alpha}$, hydrodynamics), Survival (sediment-sand, mean size, air exposure), and Environment (DO, salinity). The HSI was calculated using weighted and No weighted geometric means. The results showed high habitat suitability at the bay's entrance (HIS; No weighted, 0.60-0.70; weighted, 0.60). Hydrodynamics, air exposure, sediment-sand and mean size are thought to have a significant impact on habitat selection by Manila clams Ruditapes philippinarum. This study explored the optimum habitat for Manila clams by calculating the HSI, providing basic data for tidal flat management.

Study on Ecological Instream Flow Estimation using River2D Model in the Seomjin River (River2D 모델을 이용한 섬진강의 생태유지유량 산정에 관한 연구)

  • Roh, Kyong-Bum;Park, Sung-Chun;Jin, Young-Hoon;Park, Myoung-Ok
    • Journal of Korean Society on Water Environment
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    • v.27 no.6
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    • pp.822-829
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    • 2011
  • The purpose of the present study is to estimate the ecological instream flow for conservation and restoration of fish habitat in running water ecosystem which has very important status for stream environment. Estimation of the ecological instream flow in the present study was carried out by application of a two-dimensional depth averaged model of river hydrodynamics, River2D model. It can model fish habitat in natural streams and rivers and assess the quality of physical habitat accoriding to the species preferences for habitat suitability. Zacco platypus and Zacco temmincki were selected as target fish species in the study area of the Seomjin river. The Habitat Suitability Criteria (HSC) developed by Sung et al. (2005) were used for target fish species, life stages and habitat conditions in the study. Weighted usable area (WUA) was computed by the River2D model considering preferences of target fish species for velocity, depth, and channel substrate. The result revealed that the ecological instream flow of $10.0m^3/s$ is needed to maintain the target fish habitat at each life stage in the river.

A Study on the Analytic Unit of Habitat Suitability Assessment and Selection in Conservation Areas for Leopard Cat(Prionailurus bengalensis) - Focus on Chungcheong Province Area - (삵의 서식지 적합성 평가를 위한 분석단위 설정 및 보전지역 선정 - 충청도 지역을 중심으로 -)

  • Lee, Dong-Kun;Song, Won-Kyong
    • Journal of the Korean Institute of Landscape Architecture
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    • v.36 no.5
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    • pp.64-72
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    • 2008
  • The purpose of this study is to compare a habitat suitability grid unit included within a radius of 100m and $1km^2,\;2km^2,\;4km^2$ watershed units in order to predict suitable habitats for Chungcheong province's endangered leopard species(Prionailurus bengalensis). Other developed countries have carried out habitat assessment and established management policies for species conservation using such methods as HEP(Habitat Evaluation Procedures), HSI(Habitat Suitability Index) and GAP(Gap Analysis Program), etc. In accordance with these studies, many evaluation methods for habitat conservation have been proposed in Korea, but these studies are lacking in consideration of analytic units and general application of analysis results. This study predicted leopard habitat using a logistic regression analysis according to analytic units by data from 56 location and 8 sources of environmental data, including elevation, slope, forest area, land cover, roads, water, broadleaf trees, and human habitation. Moreover, the habitat suitability assessment unit was confirmed by a model comparison process encompassing model explanation. verification, and application on a regional scale. Results showed that assessment methods that took into consideration areas in and around the location points were beneficial in predicting habitat and that the assessment unit was appropriate for a 30m grid unit including areas within a radius of 100m and a $1km^2$ watershed unit in Chungcheong Province. This study suggests a method for regional habitat conservation to complement existing conservation area selection methods, and the results are expected to be used in conservation area selection and ecosystem management policies for endangered species.