Population Structure and Dynamics of the Picea jezoensis Stand in Mt. Gyebangsan

계방산 가문비나무 임분의 개체군구조와 동태

  • Ko, Seung-Yeon (Department of Forest Resources, Kongju National University) ;
  • Han, Sim-Hee (Department of Forest Genetic Resources, Korea Forest Research Institude) ;
  • Yun, Chung-Weon (Department of Forest Resources, Kongju National University)
  • 고승연 (국립공주대학교 산림자원학과) ;
  • 한심희 (국립산림과학원 산림유전자원부) ;
  • 윤충원 (국립공주대학교 산림자원학과)
  • Published : 2013.09.30

Abstract

This study was conducted to investigate the population structure and dynamics of the Picea jezoensis stands which are located in Mt. Gyebangsan and surveyed from March to October 2012. Results showed that the diameter class distribution of P. jezoensis presented a reverse J-shaped distribution pattern with 32 trees less than 10 cm DBH, 20 trees in 10~30 cm DBH, and 11 trees more than 30 cm DBH. It showed seedlings and saplings of P. jezoensis seem to prefer areas with more sun light or with open upper layer. It was also observed that P. jezoensis preferes areas with organic soils and abundant water such as areas around stumps. Also, occurrences of P. jezoensis stands were analyzed through annual mean radial growth of the trees. And the results showed that the growth naturally or artificially occurred approximately on the years 1854, 1915, 1918, 1993 and 2002 years. Most of the gap-makers were classified as standing dead type with 23 individuals (45.1%).

본 연구는 계방산 가문비나무 임분을 대상으로 2012년 3월부터 10월까지 36개의 영구조사구를 설치하여 개체군 구조와 동태를 분석하였다. 가문비나무의 흉고직경급별 개체 분포는 직경 10 cm 미만이 32본(50.0%), 직경 10 cm~30 cm 미만이 20본(31.2%), 직경 30 cm 이상이 11본(18.8%)으로 직경이 커질수록 개체수가 감소하는 역 J자형의 분포 유형을 나타내었다. 가문비나무 유묘 및 치수는 상층임관이 열려있거나 햇볕이 잘 들어오는 곳, 그루터기(stump)와 같이 유기물 및 수분경쟁이 유리한 장소를 선호하는 경향이었다. 연륜생장을 분석하여 가문비나무 임분 내 교란시점을 추정한 결과 1854년, 1915년, 1918년, 1993년, 2002년 전후로 하여 발생하였으며, 숲 틈 형성목(gap-maker)의 유형은 서서 죽는 경우(standing dead)가 23본(45.1%)으로 가장 많았다.

Keywords

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