Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Influences of Invasive Plant on Extracellular Enzyme Activities in Riparian Ecosystems

하변토양의 미생물체외효소활성에 미치는 칩입성 식물의 영향

  • 박순영 (연세대학교 토목환경공학과) ;
  • 김재근 (서울대학교 생물교육학과) ;
  • 강호정 (연세대학교 사회환경시스템공학부)
  • Received : 2011.12.05
  • Accepted : 2012.01.30
  • Published : 2012.02.28
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Abstract

We have measured soil enzyme activities, which represent the rates of organic matter decomposition, in four riparian ecosystems in Korea. ${\beta}$-glucosidase, N-acetylglucosaminidase, phosphatase and arylsulfatase activities were determined in five occasions over a year period in soils of control plots and plots with invasive plants, namely Sicyos angulatus and Humulus japonicus. Significantly higher enzyme activities were found in soils with invasive plant in barren land, but the difference was season and enzyme-specific. Although it was not universal changes, the invasive plants appeared to accelerate organic matter decomposition in some disturbed riparian ecosystems.

하변에 침입하는 외래종 식물은 하변 토양의 생태구조 및 기능에 영향을 미칠 수 있기 때문에 관심의 대상이다. 이에 본 연구에서는 1년간 국내 하변 총 네 지점에서 유기물질 분해율을 대표할 수 있는 미생물 체외효소 활성(${\beta}$-glucosidase, N-acetylglucosaminidase, phosphatase, arylsulfatase)을 외래종 유무에 따라 측정하였다. 하변 침입종인 환삼덩굴과 가시박 생장구 및 외래종 제거구의 토양을 분석한 결과 일부 침입성 덩굴식물 실험구에서 효소활성이 높았으나 계절 및 효소별로 그 특성이 달라 어떤 경향을 밝혀낼 수는 없었다. 허나, 교란이 발생한 하변 생태계에서는 침입성 덩굴 식물이 토양의 유기물질 분해를 가속화시키는 것으로 판단된다.

Keywords

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