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http://dx.doi.org/10.13047/KJEE.2021.35.1.24

Potential Habitat Area Based on Natural Environment Survey Time Series Data for Conservation of Otter (Lutra lutra) - Case Study for Gangwon-do -  

Kim, Ho Gul (Major in Landscape Urban Planning, Dept. of Human Environment Design, Cheongju University)
Mo, Yongwon (Dept. of Forest resources and Landscape architecture, Yeungnam Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.35, no.1, 2021 , pp. 24-36 More about this Journal
Abstract
Countries around the world, including the Republic of Korea, are participating in efforts to preserve biodiversity. Concerning species, in particular, studies that aim to find potential habitats and establish conservation plans by conducting habitat suitability analysis for specific species are actively ongoing. However, few studies on mid- to long-term changes in suitable habitat areas are based on accumulated information. Therefore, this study aimed to analyze the time-series changes in the habitat suitable area and examine the otters' changing pattern (Lutra lutra) designated as Level 1 endangered wildlife in Gangwon-do. The time-series change analysis used the data on otter species' presence points from the 2nd, 3rd, and 4th national natural environment surveys conducted for about 20 years. Moreover, it utilized the land cover map consistent with the survey period to create environmental variables to reflect each survey period's habitat environment. The suitable habitat area analysis used the MaxEnt model that can run based only on the species presence information, and it has been proven to be reliable by previous studies. The study derived the habitat suitability map for otters in each survey period, and it showed a tendency that habitats were distributed around rivers. Comparing the response curves of the environmental variables derived from the modeling identified the characteristics of the habitat favored by otters. The examination of habitats' change by survey period showed that the habitats based on the 2nd National Natural Environment Survey had the widest distribution. The habitats of the 3rd and 4th surveys showed a tendency of decrease in area. Moreover, the study aggregated the analysis results of the three survey periods and analyzed and categorized the habitat's changing pattern. The type of change proposed different conservation plans, such as field surveys, monitoring, protected area establishment, and restoration plan. This study is significant because it produced a comprehensive analysis map that showed the time-series changes of the location and area of the otter habitat and proposed a conservation plan that is necessary according to the type of habitat change by region. We believe that the method proposed in this study and its results can be used as reference data for establishing a habitat conservation and management plan in the future.
Keywords
MAXENT; PROTECTED AREA; CHANGES OF HABITAT DISTRIBUTION; HABITAT SUITABILITY MAPPING; HABITAT PREFERENCE CHARACTERISTICS;
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