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The 30-year impact of post-windthrow management on the forest regeneration process in northern Japan

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Title: The 30-year impact of post-windthrow management on the forest regeneration process in northern Japan
Authors: Li, Jing Browse this author
Morimoto, Junko Browse this author →KAKEN DB
Hotta, Wataru Browse this author
Suzuki, Satoshi N. Browse this author
Owari, Toshiaki Browse this author
Toyoshima, Motoko Browse this author
Nakamura, Futoshi Browse this author →KAKEN DB
Keywords: Aerial photos
Wind disturbance
Hemiboreal forests
Salvage logging
Issue Date: 2023
Publisher: Springer
Journal Title: Landscape and ecological engineering
Volume: 19
Start Page: 227
End Page: 242
Publisher DOI: 10.1007/s11355-023-00539-9
Abstract: The frequency and intensity of typhoons are expected to increase over time due to climate change. These changes may expose forests to more windthrow in the future, and increasing the resilience of hemiboreal forests through forest management after windthrow is important. Here, we quantified forest structure recovery using aerial photos and light detection and ranging (LiDAR) data after catastrophic windthrow events. Our aims are to test the following three hypotheses: (1) forest structure will not recover within 30 years after windthrow, (2) forest recovery will be affected not only by salvaging but also pre-windthrow attributes and geographical features, and (3) various post-windthrow management including salvaging will drastically alter tree species composition and delay forest recovery. Our results revealed that hypothesis (1) and (2) were supported and (3) was partially supported. The ordination results suggested that more than 30 years were needed to recover canopy tree height after windthrow in hemiboreal forests in Hokkaido, Japan. Salvage logging did not delay natural succession, but it significantly decreased the cover ratio of conifer species sites (0.107 +/- 0.023) compared with natural succession sites (0.310 +/- 0.091). The higher the elevation, the steeper the site, and the higher the average canopy height before windthrow, the slower the recovery of forest stands after windthrow and salvaging. Scarification and planting after salvage logging significantly increased the number of canopy trees, but those sites differed completely in species composition from the old growth forests. Our study thus determined that the choice and intensity of post-disturbance management in hemiboreal forests should be carefully considered based on the management purpose and local characteristics.
Type: article
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)

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