Tree-Ring Based Chronology of Landslides in the Shirakami Mountains, Japan

The N-Ohkawa landslide, and the southern section of the Ohkawa landslide, occurred during the snow-melt seasons of 1999 and 2006, respectively, in the Shirakami Mountains, Japan. This paper examines the response of trees in the Shirakami Mountains to landslides, and also investigates the spatio-temp...

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Bibliographic Details
Published in:Water (Basel) 2021-05, Vol.13 (9), p.1185
Main Authors: Noguchi, Kinuko, Tsou, Ching-Ying, Ishikawa, Yukio, Higaki, Daisuke, Wu, Chun-Yi
Format: Article
Language:English
Subjects:
Analysis
Canada
Deciduous trees
Dendrochronology
Japan
Landslides
Landslides & mudslides
Markers
Mountains
Plant species
Rain
Shade
Snowmelt
Tree rings
Trees
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Summary:The N-Ohkawa landslide, and the southern section of the Ohkawa landslide, occurred during the snow-melt seasons of 1999 and 2006, respectively, in the Shirakami Mountains, Japan. This paper examines the response of trees in the Shirakami Mountains to landslides, and also investigates the spatio-temporal occurrence patterns of landslide events in the area. Dendrogeomorphological analysis was used to identify growth suppression and growth increase (GD) markers in tilted deciduous broadleaved trees and also to reveal the timing of the establishment of shade-intolerant tree species. Analysis of the GD markers detected in tree-ring width series revealed confirmatory evidence of landslide events that occurred in 1999 and 2006 and were observed by eyewitnesses, as well as signals from eight additional (previously unrecorded) landslide events during 1986–2005. Furthermore, shade-intolerant species were found to have become established on the N-Ohkawa and southern Ohkawa landslides, but with a lag of up to seven years following the landslide events causing the canopy opening.
ISSN:2073-4441
2073-4441
DOI:10.3390/w13091185