広島県宮島の常緑広葉樹林におけるシカの角研ぎ

Fraying by Sika Deer (Cervus nippon) in an Evergreen Broadleaf Forest in Miyajima Island, Hiroshima, Japan

山田 俊弘

奥田 敏統

山根 明香

広島大学大学院総合科学研究科紀要. II, 環境科学研究

Bulletin of the Graduate School of Integrated Arts and Sciences, Hiroshima University. II, Studies in environmental sciences

The fraying by sika deer (Cervus nippon) in an evergreen broadleaf forest in Miyajima Island, Hiroshima, Japan, was studied. The proportion of trees frayed by deer to the total trees sampled (N = 1209) was 8.1%. Our data suggest that sika deer performed fraying on trees irrespective of diameter at breast height. We found that of the 29 tree species examined, 16 were frayed. Cleyera japonica had a significantly higher proportion of trees frayed by sika deer than the average overall proportion, suggesting that the species attracts sika deer for fraying. By contrast, sika deer significantly avoided Pinus densiflora, Lyonia ovalifolia var. elliptica, and Eurya japonica for fraying. Trees frayed were significantly spatially distributed aggregately. The fraying by deer occurred randomly, regardless of slope angles; sika deer can perform fraying even on very steep slopes. Trees on ridges avoided being frayed by deer, however. This may be explained by the presence of the trees that were less favored for sika-fraying performance (Pinus densiflora, Lyonia ovalifolia var. elliptica, and Eurya japonica), which were mainly distributed on ridge sites.

林業 [ 650 ]

日本語

広島大学大学院総合科学研究科

Copyright (c) 2016 Graduate School of Integrated Arts and Sciences, Hiroshima University, All rights reserved.

[ISSN] 1881-7696

[NCID] AA12198658