DOI: 10.1016/j.foreco.2016.08.042
Scopus记录号: 2-s2.0-84985986853
论文题名: Spatiotemporal factors affecting bark stripping of conifer trees by Asiatic black bears (Ursus thibetanus) in Japan
作者: Kobashikawa S. ; Koike S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 380 起始页码: 100
结束页码: 106
语种: 英语
英文关键词: Asiatic black bear
; Bark stripping
; Chamaecyparis obtusa
; Conifer damage
; Cryptomeria japonica
; Ursus thibetanus
Scopus关键词: Forestry
; Black bear
; Chamaecyparis obtusa
; Conifer damage
; Cryptomeria japonica
; Ursus thibetanus
; Bark stripping
; bark
; bear
; coniferous tree
; conservation planning
; damage
; environmental factor
; environmental impact
; forest management
; growth response
; management practice
; plantation forestry
; spatiotemporal analysis
; Animals
; Bark
; Forest Management
; Forests
; Softwoods
; Stripping
; Gumma
; Honshu
; Japan
; Kanto
; Tokyo [Kanto]
; Chamaecyparis obtusa
; Coniferophyta
; Cryptomeria japonica
; Ursus americanus
; Ursus thibetanus
英文摘要: Bark stripping by Asiatic black bears (Ursus thibetanus) has a serious impact on conifer plantations in Japan, resulting in physical damage to the tree trunks and reduction of the value of the timber. The aim of this study was to clarify whether these plantations are more prone to damage by bears at particular times and sites, to more effectively prevent this damaging behavior. The study was conducted at Kusaki University Forest of Tokyo University of Agriculture and Technology in Gunma Prefecture, central Japan. To determine where, when, and how frequently bears strip the bark, we established circular plots in each of 65 stands and felled all trees that had been damaged by bears. In total, we felled 1639 damaged trees, analyzed 1490 samples (Cryptomeria japonica: 1236, Chamaecyparis obtusa: 254) across the 65 study stands, and calculated the timing of bark stripping for each by counting the number of annual growth rings in each tree. Generalized linear mixed models were then used to examine the effects of various spatiotemporal factors on bark stripping. In terms of temporal variation, we found no relationships between the occurrence of bark stripping by bears and the meteorological conditions from the previous November to the previous March. In terms of spatial variation, there was no relationship between the occurrence of bark stripping by bears and the environmental characteristics of the stands. We did, however, find that stands that experienced bear damage in the previous year were more prone to experiencing bear damage in the current year, and furthermore, the rate at which damage of trees spread during the 10 years after the first occurrence of a damaged tree was significantly faster in young stands. These findings will allow forest managers to predict the conditions that make conifer stands more prone to bear damage, allowing them to make effective forest management plans. Additionally, to reduce bear damage, foresters should focus on direct protection efforts that they would like to protect from bears. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64689
Appears in Collections: 影响、适应和脆弱性
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作者单位: Tokyo University of Agriculture and Technology, 3-5-8 Saiwai, Fuchu, Japan
Recommended Citation:
Kobashikawa S.,Koike S.. Spatiotemporal factors affecting bark stripping of conifer trees by Asiatic black bears (Ursus thibetanus) in Japan[J]. Forest Ecology and Management,2016-01-01,380