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A Study on the Flora and Vegetation Changes in the Riparian Zones of Han River Watershed

한강 수변구역의 식물상 및 식생변화에 관한 연구

  • Lee, Jong-Mun (Dept. of Landscape Architecture.Environmental Planning, Graduate School of Kongju National University) ;
  • Cho, Yong-Hyeon (Dept. of Landscape Architecture, Kongju National University) ;
  • Kim, Hyun-Woo (Dept. of Dohwa Engineering Co.)
  • 이종문 (공주대학교 대학원 조경.환경계획학과) ;
  • 조용현 (공주대학교 조경학과) ;
  • 김현우 (도화엔지니어링)
  • Received : 2019.01.25
  • Accepted : 2019.03.03
  • Published : 2019.04.30

Abstract

The purpose of this study was to investigate changes in vegetation and flora after five years through field surveys data with the Han Gang Watershed Management Committee (2013) data in order to observe natural vegetation changes in the riparian zone of Han River watershed. As a result, the flora of the riparian zone in 2012 were listed total 231 taxa, 66 families, 158 genus, 207 species, 23 varieties, and 1 forms, and in 2017, a total 247 taxa, 74 families, 174 genus, 218 species, 27 varieties, and 2 forms were identified. The number of rare plants decreased from 4 taxa in 2012 to 2 taxa in total in 2017, and the number of endemic plants increased from 1 taxa to 3 taxa. The number of specific plants by floral region decreased from 21 taxa (9.1% of all 231 taxa of flora) in 2012 to 16 taxa (6.5% of all 247 taxa of flora) in 2017. The total number of naturalized plants is analyzed to increase from 35 taxa, a naturalization rate of 15.15% (all 231 taxa of flora) and urbanization index of 11.2% (all 312 taxa of naturalized plants) in 2012 to 44 taxa a naturalization rate of 17.8% (all 231 taxa of flora) and urbanization index of 14.1%(all 312 taxa of naturalized plants) in 2017. The ecosystem disturbance species showed an increase in both number of species and cover degree grades, indicating that the riparian zone changed in a negative direction.

Keywords

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Figure 1. The map of surveyed sites in the riparian zone of Han River watershed.

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Figure 2. Photo of the rare·Endemic·Naturalized plant in 2017.

Table 1. Comparison of flora classification by year in the riparian zone of Han River watershed.

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Table 2. The list of rare and endemic plants by year in the riparian zone of Han River watershed.

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Table 3. The list of specific plants by year in the riparian zone of Han River watershed.

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Table 4. The list of naturalized plants by year in the riparian zone of Han River watershed.

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Table 5. Change of cover degree grade by rare and endemic plants in the riparian zone of Han River watershed.

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Table 6. Change of cover degree grade by ecosystem disturbance plants in the riparian zone of Han River watershed.

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