Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Impact of Germination and Initial Growth of Deciduous Six Oak Species under Climate Change Environment Condition

기후변화 환경에서의 낙엽성 참나무 6종의 발아와 초기 생장

  • Jeong, Heon Mo (Team of Climate Change Research, National Institute of Ecology) ;
  • Kim, Hae Ran (Environmental Impact Assessment Team, National Institute of Ecology) ;
  • You, Young Han (Department of Biology, Kongju National University)
  • Received : 2021.11.08
  • Accepted : 2021.12.13
  • Published : 2021.12.31
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Abstract

The present study investigated the effect of global warming on germination and initial growth across six deciduous oak species (Quercus mongolica, Q. variabilis, Q. serrata, Q. dentata, Q. aliena, and Q. acutissima), which are the dominant tree species in Korea forest ecosystems. Seeds were sown in climate change treatments, with temperatures higher than those of the control (approximately 3.0℃ higher), and CO2 concentrations higher than those of the control (approximately 2-fold higher). Initial growth in each species was measured every two weeks. Initial growth was more rapid in all oak species at the time of root and shoot emergence under high temperature and CO2 treatments than in the control group. Leaf emergence in Q. mongolica, Q. variabilis, and Q. serrata occurred earlier under the climate change treatments than under the control. Root length increased significantly in Q. mongolica, Q. variabilis, and Q. dentata under the climate change treatments when compared to under the control. However, Q. aliena and Q. serrata exhibited a contrasting trends, and no significant difference was observed between the species and Q. acutissima. Shoot length increased significantly in Q. aliena under climate change treatments when compared to under the control but decreased in Q. aliena. In addition, no significant difference was observed in shoot length among Q. mongolica, Q. dentata, and Q. acutissima. The results showed that climate change treatments facilitated early growth, rapid emergence from the ground, leaf development, and enhanced belowground growth in Q. mongolica. Conversely, Q. aliena exhibited the lowest aboveground and belowground growth under climate change treatments when compared to other oak species. Climate change treatments had the least impact on Q. acutissima considering the insignificant differences observed in initial growth rates under climate change treatment.

우리나라 산림 생태계의 주요 우점종인 낙엽성 참나무 6종의 지구온난화에 의한 초기 생장의 영향을 파악하기 위하여, 야외 (대조구)와 대조구보다 온도 (3.0℃ 상승)와 CO2 농도 (2배 상승)를 증가시킨 기후변화처리구에 종자를 파종하고 2주 간격으로 발아 및 초기 생장을 측정하였다. 그 결과 6종 참나무 유식물들의 지상부와 지하부 출현시기는 대조구보다 기후변화처리구에서 모든 종이 더 빨랐다. 잎 출현시기는 기후변화처리구에서 굴참나무, 신갈나무 그리고 졸참나무가 빨랐다. 지하부 길이는 기후변화 처리구에서 굴참나무, 신갈나무 그리고 떡갈나무가 길었고 상수리나무는 구배 간 차이가 없었으며 갈참나무와 졸참나무는 짧았다. 지상부 길이는 기후변화처리구에서 졸참나무가 길었고, 상수리나무, 신갈나무 그리고 떡갈나무는 차이가 없었으며 갈참나무는 짧았다. 이상의 결과는 지구온난화 환경에서 지상부와 잎의 출현시기가 빠르고 지하부 생장이 좋은 신갈나무의 초기 생장이 가장 유리함을 나타내었다. 반면, 기후변화처리환경에서 지상부와 지하부의 생장이 가장 낮은 갈참나무는 다른 참나무에 비하여 생육이 불리하였다. 또한 상수리나무는 지구온난화 환경에 따른 초기 생장의 차이가 적어 가장 영향이 적은 나무로 판단된다.

Keywords

Acknowledgement

본 논문은 국립생태원의 "생태계의 기후변화 리스크에 대응한 적응역량 강화 연구(NIE-C-2021-35)"에 의해 지원되었습니다.

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