Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
권호 표지

Invasion of Korean Pine Seedlings Originated from Neighbour Plantations into the Natural Mature Deciduous Broad-leaved Forest in Gwangneung, Korea

광릉 천연활엽수 성숙림에서 주변 인공림으로부터 잣나무 치수의 침입 정착

  • Kang, Ho Sang (Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Lim, Jong-Hwan (Department of Forest Environment, Korea Forest Research Institute) ;
  • Chun, Jung Hwa (Department of Forest Environment, Korea Forest Research Institute) ;
  • Lee, Im Kyun (Department of Forest Environment, Korea Forest Research Institute) ;
  • Kim, Young Kul (Department of Forest Environment, Korea Forest Research Institute) ;
  • Lee, Jae Ho (Nature and Ecology Research Department, National Institute of Environmental Research)
  • 강호상 (서울대학교 농업생명과학연구원) ;
  • 임종환 (국립산림과학원 산림환경부) ;
  • 천정화 (국립산림과학원 산림환경부) ;
  • 이임균 (국립산림과학원 산림환경부) ;
  • 김영걸 (국립산림과학원 산림환경부) ;
  • 이재호 (국립환경과학원 자연생태과)
  • Received : 2007.01.31
  • Accepted : 2007.02.23
  • Published : 2007.03.31
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Abstract

Establishments of the seedlings inside the natural forest from adjacent artificial forests would be an important factor in forest stand dynamics. This study was conducted to see the invasion of Korean pine (Pinus koraiensis) seedlings which is not native in this region, into the natural deciduous broad-leaved forest in Gwangneung, Korea. There is no mother tree at the I ha study site while the number of naturally regenerated P. koraiensis seedlings was 345 trees and 56% of them were clumped with more than two seedlings at each point. Applying the image segmentation method to IKONOS satellite image of January, 2003, the distance from the center of 1 ha study site to the nearest mother tree and plantation of Korean pine were 200 m and 270 m, respectively. The average height and root-collar diameter of the seedlings were 34 em and 7 mm, respectively and the age of 207 seedlings (60%) were below 5 years old. Most abundant range of soil moisture gradient and LAl (leaf area index) were from 16 to 20% and those of LAI were from 3.1 to 3.5. To understand the dynamics and seed dispersal pattern of Korean pine in the Gwangneung natural deciduous broad-leaved forests, additional studies not only long-term monitoring of growth and mortality of naturally regenerated Korean pine seedlings but also application of stable isotope analysis and molecular genetic techniques was recommended.

주변 인공림으로부터의 종자유입에 따른 치수발생현상은 향후 천연림의 임분동태의 향방에 매우 중요한 역할을 한다. 본 연구는 광릉 천연활엽수 성숙림내 천연갱신된 잣나무 치수의 침입과 이의 동태를 파악하기 위해 수행되었다. 조사지내에는 잣나무 성목이 분포하고 있지 않으나, 천연갱신된 잣나무 치수의 밀도는 ha당 총 345본으로 전체 치수의 56%가 2개 이상씩 모여서 분포하고 있었다. 2003년 1월 IKONOS 위성영상을 이용한 조사지와 주변 잣나무 성목 및 조림지까지의 거리를 조사한 결과, 잣나무 성목과는 최소 200m, 잣나무 조림지와는 최소 270m 이상 떨어진 것으로 나타났다. 천연갱신된 잣나무 치수의 평균 묘고와 근원경은 각각 34cm, 7mm 이었으며, 수령 5년 이하의 치수가 207본(60%)이었다. 잣나무 치수와 토양 수분 및 엽면적지수(LAI)와의 관계를 분석한 결과 토양수분은 16~20%, 엽면적지수는 3.1~3.5 구간에서 잣나무 치수의 분포가 가장 많았다. 광릉 천연활엽수림내 잣나무의 동태 및 종자 분산 경향을 파악하기 위해서는 앞으로 잣나무 치수의 생장과 고사율에 대한 장기적인 모니터링과 함께 방사성 동위원소와 분자유전학적 방법 등을 활용한 추가적인 연구도 필요할 것으로 판단된다.

Keywords

Acknowledgement

Grant : 지구환경변화에 대응한 장기생태연구

Supported by : 국립산림과학원

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