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기후변화 지표종 구상나무(Abies koreana E. H. Wilson)의 생태학적 반응

The ecological response of the climate change indicator species, Korean fir (Abies koreana E. H. Wilson)

이정민|박지원|김규리|최윤경|김민선|김세희|서지현|박재훈|이주선|조경미|유영한|박여빈|서주현|김의주|김윤서|유도훈
한국습지학회 (Korean Wetlands Society)|2024.02|한국습지학회지 (Journal of Wetlands Researh)|제26권 제1호|pp. 62-71|DOI 10.17663/JWR.2024.26.1.62

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참고문헌

키워드

소지PCA주성분 분석Chlorophyll content엽록소 함량Photosynthetic rate잎 생물량광합성률TwigLeaf biomass
주제분류기타자연과학

초록

기후변화조건에서 구상나무의 생태적 변화를 파악하기 위해 5년 동안 대조구(야외)와 RCP 4.5에 근접하게 온도 및CO2를 상승시킨 기후변화처리구에서 생육 및 생리적 반응을 분석하였다. 그 결과, 기후변화처리구에서 구상나무의년생별 가지 길이는 시간이 지날수록 증가하는 경향이 나타났다. 그리고 기후변화 조건은 구상나무 잎의 형태적 차이에는 큰 영향을 주지 않지만, 잎의 생물량에는 영향을 주어, 기후변화가 진행될수록 구상나무의 잎 생산성이 저하될것으로 예상되었다. 한편, 기후변화 조건에서 구상나무의 엽록소 함량은 기후변화처리구에서 높은 반면, 광합성률, 기공전도도, 증산율, 그리고 수분이용효율은 대조구가 더 높게 나타났다. 이는 온도와 CO2가 상승된 환경이 기공밀도증가에 영향을 줄 수 있으나, 광합성 반응에는 부정적 영향을 주는 것으로 예상된다. 향후 이를 확인하기 위해 각각의환경 처리에서 기공 밀도에 대한 추가적인 연구가 필요할 것으로 판단된다. 한편, 본 연구에서는 잎의 생물량 변화만관찰하였기 때문에 기후변화 조건 하에서 구상나무의 생물량 변화에 대한 추가적인 실증 연구가 고려되어야 할 것으로 사료된다. 결과적으로 장기간 상승된 온도와 CO2에서 구상나무의 환경 적응력은 약화될 것으로 판단된다.

Abstract

To assess the ecological changes of Korean fir (Abies koreana E. H. Wilson) under climate change conditions, growth and physiological responses were analyzed over a 5-year period in a control group (outdoors) and in a treatment group where the temperature and CO2 levels were elevated to closely resemble RCP 4.5 conditions. The results showed an increasing trend in annual branch length of A.koreana in the climate change treatment group over time. While climate change conditions did not significantly impact the morphological differences of A.koreana leaves, they did influence the biomass of the leaves, suggesting that as climate change progresses, the productivity of A.koreana leaves may decline. On the other hand, the chlorophyll content in A.koreana under climate change conditions was higher in the climate change treatment group, whereas the photosynthesis rate, transpiration rate, water use efficiency and stomatal conductance was higher in the control group. This suggests that an environment with elevated temperature and CO2 could influence an increase in stomatal density, but having a negative impact on photosynthetic reactions. Further research on stomatal density under each environmental treatment will be required to confirm this hypothesis. Additionally, as this study only observed changes in leaf biomass, further empirical research should be considered to understand the changes in biomass of A.koreana under climate change conditions. In conclusion, the environmental adaptability of A.koreana is expected to weaken in the long term under elevated temperatures and CO2.

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