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Effects of surface and light conditions of fallen logs on the emergence and survival of coniferous seedlings and saplings

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Title: Effects of surface and light conditions of fallen logs on the emergence and survival of coniferous seedlings and saplings
Authors: Iijima, Hayato Browse this author
Shibuya, Masato Browse this author →KAKEN DB
Saito, Hideyuki Browse this author
Keywords: Abies sachalinensis
Environmental conditions
Picea jezoensis
Regeneration on fallen logs
Seedling dynamics
Issue Date: Aug-2007
Publisher: Springer Japan
Journal Title: Journal of Forest Research
Volume: 12
Issue: 4
Start Page: 262
End Page: 269
Publisher DOI: 10.1007/s10310-007-0012-1
Abstract: We surveyed the germination number (N cs) of 2-year and a 1-year survival of Abies sachalinensis and Picea jezoensis seedlings and saplings on 29 fallen logs from 2004 to 2005 in a natural coniferous forest in Hokkaido, northern Japan, in relation to the surface and light conditions of fallen logs. Moss height (H moss), log hardness (Hardness), and the area of fallen log (Area) were measured as the surface conditions by each 1-m block from bottom to top of all fallen logs. The relative photosynthetic photon flux density (rPPFD) 10 cm above the tallest seedling in each block was measured as the light condition. In addition, the height of the tallest seedling or sapling in each block (H max), the difference between a height of each seedling and sapling and the H max (Shading), and a height of seedlings and saplings in 2004 (H ini) were considered. N cs of A. sachalinensis was affected by Hardness and Area, whereas N cs of P. jezoensis was affected by H moss, Hardness, Area, H max, and rPPFD. The survival of seedlings (height < 5 cm) and saplings (5 cm ≤ height < 50 cm) were affected by H ini, rPPFD, and shading for both species. However, the survival of P. jezoensis saplings was more sensitive to decrease in rPPFD and increase of shading than that of A. sachalinensis. Therefore, seedling emergence was influenced by surface conditions, whereas survival was affected by light conditions. Furthermore, P. jezoensis emergence and survival were more sensitive to surface and light conditions than that of A. sachalinensis.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/28238
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 飯島 勇人

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