[논문]점봉산 신갈나무 낙엽의 분해율과 미기상요인과의 상관관계 분석

원호연; 이영상; 이재석; 이일환

doi:10.11626/kjeb.2022.40.4.455

점봉산 신갈나무 낙엽의 분해율과 미기상요인과의 상관관계 분석
Correlation between litter decomposition rate of Quercus mongolica leaf and microclimatic factors at Mt. Jeombongsan 원문보기

환경생물 = Korean journal of environmental biology, v.40 no.4, 2022년, pp.455 - 463

원호연 (국립생태원 기후생태관측팀) , 이영상 (국립생태원 기후생태관측팀) , 이재석 (건국대학교 생명과학특성학과) , 이일환 (국립생태원 기후생태관측팀)

초록
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기후변화에 따른 산림생태계의 기능 변화를 파악하기 위해 산림생태계의 중요한 기능인 낙엽분해율과 미기상 요인과의 상관관계를 분석하였다. 2017년 1월부터 48개월간 동사면과 서사면에 설치된 낙엽주머니를 통해 낙엽의 분해율을 분석하고 연구지소의 미기상요인(대기온도, 토양온도, 토양수분)을 관측하여 상관관계를 도출하였다. 48개월 경과 후 신갈나무 낙엽의 잔존율은 동사면과 서사면에서 각각 27.1±1.3%, 37.0±3.6%로 감소하였으며, 이에 따른 낙엽의 분해상수(k)는 동사면과 서사면에서 각각 0.33, 0.25로 나타났다. 신갈나무 낙엽의 초기 C/N비율은 38.5이었으며 시간이 경과함에 따라 감소하여 48개월 경과 후 동사면과 서사면의 C/N비율은 각각 13.4, 16.7로 나타났다. 연구지소의 조사기간 동안 평균 대기온도 및 토양온도는 동사면과 서사면에서 각각 8.2±9.0, 9.1±9.3과 8.5±7.4, 9.3±7.3℃로 서사면에서 더 높게 나타났다. 토양수분의 경우, 동사면과 서사면에서 평균 19.4±11.0, 20.5±5.7%로 큰 차이를 보이지 않았으나 연간 변화 양상이 다소 다르게 나타났다. 분석된 낙엽의 분해율과 미기상 요인과의 상관관계를 분석해본 결과, 동사면에서 낙엽분 해율과 토양수분이 양의 상관관계를 갖는 것으로 나타나, 낙엽분해율은 토양수분량에 영향을 받는 것으로 나타났다. 본 연구를 통해 향후 기후변화에 따른 폭우, 폭설 등의 영향이 산림생태계의 기능에 미치는 변화에 대응할 수 있는 기초자료를 제공하고자 한다.

Abstract ▼ AI-Helper

To understand functional changes of forest ecosystems due to climate change, correlation between decomposition rate of leaf litter, an important function of forest ecosystems, and microclimatic factors was analyzed. After 48 months elapsed, percent remaining weight of Quercus mongolica leaf litter was 27.1% in the east aspect and 37.0% in the west aspects. Decay constant of Q. mongolica leaf litter was 0.33 in the east aspect and 0.25 in the west aspect after 48 months elapsed. Initial C/N ratio of Q. mongolica leaf litter was 38.5. After 48 months elapsed, C/N ratio of decomposing Q. mongolica leaf litter decreased to 13.43 in the east aspect and 16.72 in the west aspect. Average air temperature and soil temperature during the investigation period of the research site were 8.2±9.0 and 9.1±9.3 in the east and 8.5±7.4 and 9.3±7.3℃ in the west aspect, respectively, with the west aspect showing higher air and soil temperatures. Soil moisture showed no significant difference between east and west aspects (average soil moisture: 19.4±11.0% vs. 20.5±5.7%). However, as a result of analyzing the correlation between decomposition rate and microclimatic factors, it was found that the decomposition rate and soil moisture has a positive correlation(r=0.426) in the east aspect but not in the west aspect. Our study shows that the correlation between decomposition rate and microclimatic factors can be significantly different depending on the direction of the aspect.

주제어

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