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2026 Vol.13, Issue 2 Preview Page

Original Article

Soil Environmental Variation and Carbon Fluxes across Vegetation Types in a Riverine Wetland

하천형 습지의 식생 분포에 따른 토양 환경 차이와 탄소 플럭스 특성

Hyunyoung Oh1
,
Vonihanitriniaina D.Z. Andriamanantena R.1
,
Ahmad Priyo Sambodo1
,
Younhong Min2
,
Jisung Lee2
,
Yeonsoo Kwak2
,
Jiwon Choi2
,
Jungin Kim2
,
Chaelee Park1
,
Jaehyun Lee3
,
Hojeong Kang4
,
Yeonjoo Kim5*
오 현영1
,
Andriamanantena R. Vonihanitriniaina D.Z.1
,
Sambodo Ahmad Priyo1
,
민 연홍2
,
이 지성2
,
곽 연수2
,
최 지원2
,
김 정인2
,
박 채리1
,
이 재현3
,
강 호정4
,
김 연주5*
1Ph.D. Student, Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
2Master Student, Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
3Researcher, Climate and Environmental Research Institute, Korea Institute of Science and Technology, Seoul 02792, Korea
4Professor, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
5Professor, Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
1연세대학교 건설환경공학과 박사과정
2연세대학교 건설환경공학과 석사과정
3한국과학기술연구원 선임연구원
4North China University of Water Resources and Electric Power 교수
5연세대학교 건설환경공학과 교수
*Corresponding Author
30 June 2026. pp. 93-107
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Abstract

Riverine wetlands represent the largest proportion of inland wetland area in South Korea, yet vegetation-specific soil carbon flux observations from these ecosystems remain scarce. In this study, heterotrophic soil respiration and methane emissions of three dominant vegetation types—Phragmites australis, Miscanthus sacchariflorus, and Salix koreensis—at two riverine wetland sites in Icheon and Jinju were measured and their environmental controls were examined. Across all vegetation types and sites, temperature was the primary driver of soil respiration, while temperature sensitivity (Q10: 1.65–2.62) was consistently greater in herbaceous soils than in woody vegetation soils. Most soils acted as weak methane sinks or showed negligible emissions; only Salix soils at lower elevations adjacent to the river channel exhibited episodic high methane emissions. A classification and regression tree analysis revealed moisture content of 43% and temperature of 25°C as critical thresholds for a sharp increase in methane emissions, suggesting that methane dynamics in these wetlands are driven less by gradual seasonal shifts than by the crossing of discrete environmental thresholds. Results of this study highlight that carbon budgets of riverine wetlands cannot be adequately characterized by vegetation type alone; microtopography-driven spatial variation in hydrological and edaphic conditions must also be considered.

Keywords
Methane flux
Moisture threshold
Riverine wetland
Soil respiration
Temperature sensitivity
Vegetation type

하천형 습지는 국내 내륙습지 면적의 가장 큰 비율을 차지하지만, 식생 유형에 따른 토양 탄소 플럭스에 대한 현장 관측 연구는 매우 제한적이다. 본 연구는 이천과 진주의 하천형 습지에서 갈대, 물억새, 버드나무 세 식생 유형별 종속영양 토양 호흡량과 메탄 발생량을 관측하고, 이를 조절하는 환경 요인을 분석하였다. 토양 호흡량은 식생 유형이나 조사지에 관계없이 온도가 지배적인 조절 요인이었으며, 온도 민감도(Q10: 1.65~2.62)는 초본류(갈대, 물억새) 토양에서 목본류(버드나무)보다 높게 나타났다. 메탄은 대부분의 토양에서 흡수되거나 미미한 배출 수준에 그쳤으나, 하천 인접 저지대에 위치한 버드나무 토양에서만 간헐적인 대량 배출이 나타났다. 분류·회귀나무 분석에서 수분 함량 43%와 온도 25°C가 메탄 급증의 임계점으로 도출되어, 메탄 발생이 계절적 변화보다 특정 임계 조건의 충족 여부에 좌우됨을 확인하였다. 이러한 결과는 하천형 습지의 탄소 수지를 평가할 때 식생 유형뿐 아니라 미시 지형에 따른 수문·토양 조건의 공간적 차이를 반드시 고려해야 함을 시사한다.

키워드
메탄 플럭스
수분 임계점
하천형 습지
토양 호흡
온도 민감도
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 13
  • No :2
  • Pages :93-107
  • Received Date : 2026-05-13
  • Revised Date : 2026-05-27
  • Accepted Date : 2026-05-27
  • DOI :https://doi.org/10.17820/eri.2026.13.2.093
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