Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Distribution of Microflora and Mesofauna in the Forest Soils of Gwangneung Experimental Forest

광릉시험림 산림토양의 미생물상 및 중형동물상 분포

  • Eo, Jinu (Department of Herbal Crop Research, Rural Development Administration) ;
  • Park, Byung Bae (Division of Forest Ecology, Korea Forest Research Institute) ;
  • Park, Kee-choon (Department of Herbal Crop Research, Rural Development Administration) ;
  • Chun, Jung Wha (Division of Forest Ecology, Korea Forest Research Institute)
  • 어진우 (농촌진흥청 국립원예특작과학원) ;
  • 박병배 (국립산림과학원 산림생태연구과) ;
  • 박기춘 (농촌진흥청 국립원예특작과학원) ;
  • 천정화 (국립산림과학원 산림생태연구과)
  • Received : 2011.08.02
  • Accepted : 2011.09.06
  • Published : 2011.12.31
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Abstract

The aim of this study was to investigate the distribution of soil biota across forest types and soil depths in Gwangneung Experimental Forest. We selected 5 sites, which are 3 deciduous- and 2 coniferous forests. The abundance of microflora in these areas was analyzed by the phospholipid fatty acid (PLFA) indicators, and the density of mesofauna was measured by the abundance of nematodes and microarthropods. The abundance of soil microflora was higher in the A layer than in the B layer based on the PLFA indicators, but there were no differences between deciduous and coniferous forests. Average density of nematodes was higher in the A horizon than in the B horizon. The density of fungivorous nematodes was higher in the deciduous forests. Mean densities of Collembola and Oribatida were 44% and 42% of microarthropods in soil samples, respectively. The results of microbial PLFA indicators were significantly correlated with the density of their consumers, which reflected that the food web in fungi- and bacteria-based soil developed in this forests. This study suggested that the distribution of soil organisms largely separated by soil depths and was slightly affected by the forest type in the Gwangneung Experimental Forest.

본 연구 목적은 광릉시험림 지역의 침엽수림과 활엽수림에서 토양 깊이가 미생물상과 중형동물상 분포에 미치는 영향을 구명하는 것이다. 토양 미생물상은 인지질지방산(PLFA) 지표를 이용하여 그 밀도정도를 분석하였고, 중형동물상은 선충과 미소절지동물의 밀도를 조사하였다. 미생물 PLFA지표는 B층보다 A층에서 높았고, 산림형에 따른 차이는 적었다. 선충 밀도도 A층에서 높았으며, 곰팡이섭식성 선충의 밀도는 침염수림 토양보다 활엽수림 토양에서 높게 나타났다. 미소절지동물 중에서 톡토기와 날개응애의 평균밀도는 전체 미소절지동물 밀도의 44%와 42%를 각각 보였다. 세균과 곰팡이를 나타내는 PLFA 지표가 이들을 섭식하는 중형동물과 유의한 양의 상관관계가 있었으며, 이것은 이 지역 토양에서 세균과 곰팡이를 중심으로 한 먹이망 형성이 이들의 분포에 영향을 준다는 것을 나타낸다. 이러한 결과는 광릉시험림의 토양생물 분포는 주로 토양의 깊이에 영향을 받으며, 산림형은 부분적인 영향을 주고 있음을 알 수 있었다.

Keywords

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