Ecological Diagnosis on Korean Red Pine (Pinus densiflora Seibold & Zucc) Stands in Isolated Urban Forest

도시(都市) 내(內) 고립(孤立) 림지(林地)의 소나무림(林)에 대(對)한 생태학적(生態學的) 진단(診斷)

  • Cho, Hyun-Je (College of Environment, Keimyung University)
  • Received : 2007.06.14
  • Accepted : 2007.06.28
  • Published : 2007.09.30

Abstract

The urban forest offer many opportunities to maintain and enhance local and regional biological diversity. Pinus densiflora stands in isolated urban forest in five areas of Seoul, Incheon, Daegu, Ulsan, and Cheongju were investigated by landscape and community ecological methods for diagnosis of current status and construction of conservation plan. Species composition of five study areas revealed regional characteristics. As the result of stand dynamics, absence of pine seedlings and saplings were observed. Cheongju, significantly, revealed highest species diversity (H'=1.86) and richness (24) among study areas, and the opposite was true for Daegu (1.35 for H', and 14 for richness). Ratio of alien species was highest in Daegu (15.8%) (F=5.05, p=0.0016). Based on landscape analysis, complexity of pine patch was higher in local city than metropolitans, but statistically not significant (p=0.133). Complexity of pine patch revealed significant positive correlation with diversity and richness, but not with percentage of aliens. Synthetically, ecological management based on community and landscape ecological information was recommended. Cautious artificial regeneration strategy was necessary to regenerate pine forest in urban area.

도시림은 도시생태계의 생물종다양성 유지와 증진에 많은 기회를 제공한다. 본 연구는 군락 및 경관생태학적 방법으로 서울, 인천, 대구, 울산, 그리고 청주 등 5개 도시역의 고립 임지 내 소나무림의 현존 상태를 진단하여 효율적인 보전방안을 모색하기 위한 기초정보를 제공하는데 있다. 5개 조사지역은 각각 나름대로의 지역적 특성을 나타내고 있었는데, 소나무림의 임분 동태에서 보면 모든 지역에서 소나무 유식물의 발생이 오래전 단절된 상태로 나타났다. 종다양성 지수에 있어서는 청주가 평균 1.86으로 가장 높게 나타났으며, 대구는 1.35로 가장 낮게 나타났다. 외래종 비율은 대구가 15.8%로 가장 높은 반면, 청주가 4.9%로 가장 낮게 나타나 종다양성과는 상반된 경향을 보였다. 식생 경관분석 결과, 소나무 패치의 복잡성 정도 즉 프랙탈 지수에 있어서는 대도시보다 중소도시에서 보다 높게 나타났으나 통계적으로 유의성은 없었다. 소나무 패치의 복잡성은 종다양성 및 종풍부도와 유의한 상관관계를 보였으나 외래종 비율과는 그렇지 않은 것으로 나타났다. 종합적으로 보면, 도시 내 고립 임지의 소나무림을 재생하기 위해서는 군락과 경관생태학적 정보에 의거한 생태학적 관리와 더불어 신중한 인공갱신 전략이 필요하다고 생각된다.

Keywords

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