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Community Regeneration and Development Traits of Ulmus pumila L.

비술나무(Ulmus pumila L.) 군락의 재정착과 발달 특성

  • Young-Chul Kim (Research Center for Natural Science, Gangneung-Wonju National University) ;
  • Hyun-Hee Chae (Research Laboratory of Korean Rare and Endangered Plants) ;
  • Bo-Ram Hong (Department of Biology, Gangneung-Wonju National University)
  • 김영철 (강릉원주대학교 자연과학연구소) ;
  • 채현희 (한국희귀멸종위기식물연구소) ;
  • 홍보람 (강릉원주대학교 생물학과)
  • Received : 2022.11.17
  • Accepted : 2023.01.18
  • Published : 2023.02.28

Abstract

Many ecologists try to understand plant communities and societies' changing processes by interacting with environmental factors. Plant communities formed in the sidings of streams, which are more dynamic than forest vegetation, are closely related to the disturbance regime of streams. U. pumila, which forms communities at the edges of streams, is distributed over the central and northern regions of the Korean Peninsula. In this study, we intended to explain the regeneration of U. pumila communities in the upstream region of the Namhangang River. Heights from the stream surface to the mid-high points of communities increased when the age class of U. pumila communities increased. On the other hand, the height of U. pumila tended to increase and decrease as the age class increased. The richness (S), evenness (J'), diversity (H'), and maximum diversity (H'max) also showed a tendency to increase and then decrease as the age class increased. On the other hand, the number of stems per individual and density (D) decreased as the age class increased. Seedlings of U. pumila failed to regenerate in the communities at the intermediate or higher stage of the age class. Regeneration of seedlings occurred in the spaces formed by the flooding, which occurred periodically in streams. After regeneration, U. pumila communities grew like a single organism. On the other hand, the plant species consisting of U. pumila communities exhibited a process in which the S and H' increased and then decreased as they developed. In other words, we determined that the changes in the species compositions were associated with changes in each species' environment and community. A space where seeds can regenerate seedlings should be provided for the regeneration of U. pumila communities. In the mid/upstream region of the Namhangang River, where the present study focused, newly formed communities were rare because the space required to regenerate U. pumila ceased to exist. Accordingly, we suggest securing an appropriate space for the regeneration of seedlings to maintain the U. pumila communities in the upstream region of the Namhangang River.

Keywords

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