DOI: 10.1016/j.foreco.2016.11.019
Scopus记录号: 2-s2.0-85006785054
论文题名: Survival and growth as measures of shade tolerance of planted western redcedar, western hemlock and amabilis fir seedlings in hemlock-fir forests of northern Vancouver Island
作者: Weber A. ; Kimmins J.P. ; Lo Y.-H. ; Leckie S. ; Gilbert B. ; Blanco J.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 386 起始页码: 13
结束页码: 21
语种: 英语
英文关键词: Edge effects
; Light tolerance
; Light-nutrient interactions
; Seedling growth
; Seedling survival
Scopus关键词: Ecology
; Nutrients
; Nutrition
; Seed
; Edge effect
; Nutrient interactions
; Photosynthetically active radiation
; Root-collar diameters
; Seedling growth
; Seedling survival
; Survival and growth
; Tsuga heterophylla
; Forestry
; biomass
; browsing
; coniferous forest
; coniferous tree
; deer
; edge effect
; forest edge
; growth rate
; herb
; light intensity
; photosynthetically active radiation
; seedling
; shade tolerance
; survival
; trace element
; windthrow
; British Columbia
; Canada
; Vancouver Island
; Abies
; Abies amabilis
; Cervidae
; Thuja plicata
; Tsuga heterophylla
英文摘要: We examined two measures of shade tolerance (survival and growth) of planted 1-year-old seedlings of western redcedar (Thuja plicata (Donn ex D. Don)), western hemlock (Tsuga heterophylla ([Raf.] Sarg.)) and amabilis fir (Abies amabilis ([Dougl. ex Loud] Dougl. ex Forbes)). Seedlings were planted at two different sites (forest interior: 4.5% mean above canopy photosynthetically active radiation [ACPAR], and forest edge: 41.5% mean ACPAR), in a 90-year-old, windthrow origin, unmanaged mesic western hemlock-amabilis fir stand. Seedlings were planted in 1997, and re-measured in 1998 and 2001 (after five growing seasons). To assess the effects of deer browsing on redcedar survival and growth, additional seedlings of this species were planted and protected with Vexar© tubes. To examine for nutrient-light interactions, half of these seedlings were fertilized with N-P-K and micronutrients at planting. Western redcedar had high levels of survival after 4 years (98% in edge plots and 93% in interior plots). Redcedar seedlings in edge plots were more vigorous but were browsed more heavily than in the interior plots. At edge sites, the negative effects of the Vexar© tubes may have been lower than their positive effects. Hemlock survival was about 50% in the stand interior but 80% in the edge plots. Amabilis fir in the interior plots had the lowest survival of the three species, with only 40% of initial seedlings surviving over the next four years, but had high survival in edge plots (95%). Height, biomass, and root collar diameter growth were significantly higher in edge plots for fir and hemlock. However, for redcedar, only biomass was significantly higher and no differences were detected for height and diameter. Our results show that shade tolerance cannot be assessed by simple measures of leaf/light relationships alone, but also requires consideration of light, nutrition, growth and browsing. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64526
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Sciences, University of British Columbia, Vancouver, Canada; Department of Botany, University of British Columbia, Vancouver, Canada; Departamento de Ciencias del Medio Natural, Universidad Pública de Navarra, Pamplona, Spain
Recommended Citation:
Weber A.,Kimmins J.P.,Lo Y.-H.,et al. Survival and growth as measures of shade tolerance of planted western redcedar, western hemlock and amabilis fir seedlings in hemlock-fir forests of northern Vancouver Island[J]. Forest Ecology and Management,2017-01-01,386