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http://dx.doi.org/10.14578/jkfs.2019.108.2.168

Floristic Composition, Structure, and Dynamics of Koelreuteria paniculata Communities in Daegu City  

Kim, Jun-Soo (Nature and Forest Research Institute)
Cho, Joon-Hee (Nature and Forest Research Institute)
Kim, Hak-Yun (Department of Global Environment, Keimyung University)
Cho, Hyun-Je (Nature and Forest Research Institute)
Publication Information
Journal of Korean Society of Forest Science / v.108, no.2, 2019 , pp. 168-176 More about this Journal
Abstract
To understand the floristic composition, vegetation structure, and population dynamics of Koelreuteria paniculata communities, which are native to Daegu, South Korea, a field survey was conducted in July 2018 using phytosociological and complete enumeration methods. Based on information on vegetation and trees of >5 cm diameter at breast height collected during the field survey, we classified the community types by species composition and analyzed their vegetation strata, relative importance value (MIV), life forms, species diversity, and population structure. The community was divided into the following three types: Ulmus parvifolia-Vitex negundo var. incisa subcommunity, Securinega suffruticosa subcommunity, and Clematis apiifolia community. The vegetation unit system was organized into one community group, two communities, and two subcommunities. Vegetation coverage of the tree layer was >85%, while the herbaceous layer was <10%. MIV of K. paniculata appeared to be extremely high within all vegetation strata, with 94.3 of the tree layer, 81.6 of the subtree layer, 75.5 of the shrub layer, and 60.0 of the herbaceous layer. The species diversity (H') was significantly different among the community types, and the C. apiifolia community (2.062) was approximately four times higher than the S. suffruticosa subcommunity (0.547). The overall representative life form types were "$MM-R_5-D_4{\cdot}D_2-e$,", but there were some differences in the disseminule form among the community types. The population structure of K. paniculata showed the reverse J-shaped distribution with a high density of young individuals and low density of larger individuals among all three community types, and because no plant species within the lower vegetation could replace K. paniculata, it was considered to be a sustainable population.
Keywords
Koelreuteria paniculata; floristic composition; structure; dynamics; life forms;
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