NDLI: Spatial pattern of forest structure mediated by topography in a steep mountain basin in West Tanzawa, Japan

Content Provider	Springer Nature Link
Author	Kitagawa, Ryo Kondo, Hirofumi Sakai, Akiko
Copyright Year	2013
Abstract	In steep mountainous areas where geological activity is generally high, forest structure is controlled by ground–surface processes and topography, but this has rarely been investigated at the water catchment scale. Across a 306 ha basin covered with temperate forest on Mt Tanzawa, we conducted a field investigation of trees above 5 cm in diameter at breast height in 105 plots (0.01 ha) set at regular intervals. Total basal area (Total BA), basal area of the largest tree (MAX BA), and number of trees and species per unit area were examined in relation to topographical variables. Results showed that MAX BA was larger on main ridges and gentle slopes, whereas the number of trees was larger on branch ridges and on thin soils. Both MAX BA and number of trees significantly contributed to Total BA, although the former had a larger effect. Analyses for each species indicated that the higher value of MAX BA on main ridges was mainly explained by late-successional species. We suggest that ground stability controlled the spatial pattern of forest structure. We found a complex topographical niche differentiation among species: e.g., Fagus crenata, the most dominant and largest species, tended to occur on relatively flat ground at higher elevation, and its BA became larger around main ridges with deep soils. The most abundant species, Carpinus japonica, tended to occur on steep slopes and thin soils, and its BA was larger on north-facing slopes. Thus, complex topographical relief promotes habitat heterogeneity that underlines the biodiversity of the basin.
Starting Page	205
Ending Page	214
Page Count	10
File Format	PDF
ISSN	13416979
Journal	Journal of Forest Research
Volume Number	19
Issue Number	1
e-ISSN	16107403
Language	English
Publisher	Springer Japan
Publisher Date	2013-07-16
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Above-ground biomass Forest structure Steep topography Topographical niche differentiation Temperate forest Forestry Forestry Management Tree Biology Plant Sciences Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Forestry

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