DOI: 10.1016/j.foreco.2014.06.029
Scopus记录号: 2-s2.0-84906279532
论文题名: Spatial patterning of underrepresented tree species in canopy gaps 9years after group selection cutting
作者: Poznanovic S.K. ; Poznanovic A.J. ; Webster C.R. ; Bump J.K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 331 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Betula alleghaniensis
; Gap-partitioning theory
; Kernel density estimate (KDE)
; Northern hardwoods
; Ripley's K
; Tsuga canadensis
Scopus关键词: Moisture
; Betula alleghaniensis
; Gap-partitioning theory
; Kernel density estimate
; Northern hardwoods
; Ripley's K
; Tsuga canadensis
; Reforestation
; canopy
; group selection
; maturation
; moisture content
; regeneration
; reproductive success
; silviculture
; spatial variation
; species diversity
; tree
; canopy gap
; coniferous tree
; cutting
; deciduous tree
; heterogeneity
; landscape
; magnitude
; spatial analysis
; Betula alleghaniensis
; Tsuga canadensis
英文摘要: Group selection and gap-based silvicultural systems are often proposed to promote compositional and structural heterogeneity across forest landscapes. The gap environment creates gradients of resources, especially light and moisture, that are important for maintaining and enhancing tree species diversity. To advance understanding of spatial variability of tree regeneration in forest gaps, seedlings and saplings of yellow birch ( Betula alleghaniensis Britton) and eastern hemlock ( Tsuga canadensis (L.) Carrière) were mapped in 49 group-selection openings with diameters of 1, 1.5, and 2 times canopy tree height (22. m), 9. years after the openings were created. We used Ripley's K, kernel density estimates, and raster-based local statistics to analyze spatial point patterns. Our results indicate that spatial patterns in the openings were mostly aggregated. The southern edges of the largest openings contained the highest magnitude of yellow birch and eastern hemlock per unit area. Moisture availability and opening size appear to be important factors underlying regeneration success in this study. Over time, the spatial patterns of these species may shift as the southern locations become less suitable for the shade mid-tolerant yellow birch. Continued monitoring and additional treatments, such as gap expansion along southern borders, will likely be necessary in order to ensure underrepresented species successfully reach maturity. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65746
Appears in Collections: 影响、适应和脆弱性
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作者单位: Ecosystem Science Center, School of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI 49931, United States
Recommended Citation:
Poznanovic S.K.,Poznanovic A.J.,Webster C.R.,et al. Spatial patterning of underrepresented tree species in canopy gaps 9years after group selection cutting[J]. Forest Ecology and Management,2014-01-01,331