Journal of Forest Research

, Volume 15, Issue 2, pp 108–114

Site preference and occurrence patterns of Picea jezoensis and Abies sachalinensis on decayed logs in natural coniferous forests in Hokkaido, northern Japan

Original Article
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Abstract

The objectives of this study were to investigate differences in the site preferences of seedlings of Picea jezoensis and Abies sachalinensis on decayed logs, and to examine the occurrence patterns of seedlings and saplings of the two species and whether they occur together or separately on logs. We characterized the habitats of 1–2-year-old seedlings of the two species on logs and examined the relationship of the two species on logs by growth stages in two plots. One plot had been disturbed about 50 years ago whereas the other had not for a long time. Although the thickness of moss and the litter layer in the habitats of 1–2-year-old seedlings were significantly different between the two species, the two species could occur together. In one study plot, seedlings and saplings of the two species occurred together. The initial occurrence pattern of the seedlings affected the occurrence patterns of the saplings on logs. The occurrence patterns of the seedlings and saplings of the two species on logs seemed to be affected by the abundance of seed trees. In the other study plot saplings of the two species occurred separately, but one species was not always competitively superior to the other species. Disturbance history affected the occurrence patterns of the saplings of the two species on decayed logs at the two study plots. Consequently, it is concluded that seed dispersal and the abundance of available logs, which are usually affected by disturbance, are significant factors in the natural regeneration of conifers in Hokkaido.

Keywords

Abies sachalinensis Decayed logs Disturbance Natural regeneration Picea jezoensis 

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Copyright information

© The Japanese Forest Society and Springer 2009

Authors and Affiliations

  1. 1.Graduate School of AgricultureHokkaido UniversitySapporoJapan
  2. 2.Forest Tree Breeding CenterForestry and Forest Products Research InstituteHitachiJapan

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