The Korean Journal of Ecology

The Ecological Society of Korea (한국생태학회)
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Changes in Understory Vegetation of a Thinned Japanese Larch (Larix leptolepis) Plantation in Yangpyeong, Korea

  • Son, Yo-Whan (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Lee, Yoon-Young (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Kim, Rae-Hyun (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Seo, Kyung-Won (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Ban, Ji-Yeon (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Seo, Kum-Young (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Koo, Jin-Woo (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Kyung, Ji-Hyun (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Noh, Nam-Jin (Division of Environmental Science and Ecological Engineering, Korea University)
  • Published : 2004.12.01
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Abstract

Photosynthetically active radiation (PAR) beneath the forest canopy, understory species richness and diversity, and biomass were measured in a Larix leptolepis plantation seven years after thinning in Yangpyeong. Four different thinning intensities (control, $10\%,\;20\%\;and\;40\%$ stocking reduction) were applied in 1997. The current PAR values were lower than those measured four years after thinning, and PAR at the heavy thinning plots was significantly higher than that of other thinning intensities. A total of 23 species including 9 tall-trees and 14 shrubs were found for the high layer while a total of 82 species including 10 tall-trees, 29 shrubs, and 43 herbs for the low layer. Species richness and diversity generally increased with thinning intensities, and the trends were more evident for the low layer. Aboveground biomass significantly differed among thinning intensities for both shrubs and herbs. Also there was a negative correlation between biomass and the current number of stems per hectare. The current study suggested that the effects of thinning on light conditions at the forest floor, species richness and diversity and production of understory vegetation continued seven years after the treatment.

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References

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