DOI: 10.1016/j.foreco.2016.03.055
Scopus记录号: 2-s2.0-84961933633
论文题名: Short-term effects of three commercial thinning treatments on diversity of understory vascular plants in white spruce plantations of northern New Brunswick
作者: Haughian S.R. ; Frego K.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 370 起始页码: 45
结束页码: 55
语种: 英语
英文关键词: Biodiversity
; Commercial thinning
; Functional group
; Plantation
; Sub-boreal forest
; Understory
Scopus关键词: Biodiversity
; Debris
; Functional groups
; Plants (botany)
; Before-after control impacts
; Boreal forests
; Commercial thinning
; Compositional difference
; Indicator species analysis
; Plantation
; Silvicultural prescriptions
; Understory
; Forestry
; abundance estimation
; biodiversity
; coarse woody debris
; commercial activity
; coniferous forest
; coniferous tree
; functional group
; plantation forestry
; population dynamics
; range expansion
; Subboreal
; thinning
; woody debris
; Canada
; New Brunswick
; Picea glauca
; Tracheophyta
英文摘要: Plantation forestry is increasing in frequency and extent across the landscape, but can negatively impact biodiversity by promoting stand homogeneity and early-seral species dominance. Modifying silvicultural prescriptions in plantations, particularly with respect to creating or retaining more coarse woody debris (CWD), may improve their ability to support biodiversity, by mimicking some aspects of natural disturbance. We used a modified before-after-control-impact design to examine the response of understory vascular plants to four treatments in 25-year-old white spruce plantations of northwestern New Brunswick. Treatments included commercial thinning (CT) with enhanced, moderate, or no debris, as well as an unthinned control. Understory composition was analyzed using complementary methods that summarize biological communities at different resolutions: indicator species analysis, functional group responses, ordination, and biodiversity indices. Understory plants increased in overall richness and abundance after thinning, particularly in no-debris treatments. This was driven by (1) expansion of pre-established clonal forest herbs and (2) invasion of graminoids and long-distance dispersers. Several disturbance-sensitive species were significantly more abundant in unthinned controls. Few compositional differences were observed between the moderate and enhanced debris treatments, perhaps because the effects of CWD creation require longer to detect than those of thinning and ground-layer disturbance (from debris-removal). We recommend (1) continued monitoring of changes in moderate and enhanced treatments to determine the effects of debris-modification and (2) avoiding silvicultural prescriptions that remove branches, tree-tops, and other non-merchantable wood, which appear to facilitate early-seral species, and negatively impact disturbance-sensitive species. © 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64933
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biology, University of New Brunswick, P.O. Box 5050, Saint John, NB, Canada
Recommended Citation:
Haughian S.R.,Frego K.A.. Short-term effects of three commercial thinning treatments on diversity of understory vascular plants in white spruce plantations of northern New Brunswick[J]. Forest Ecology and Management,2016-01-01,370