DOI: 10.1016/j.foreco.2015.09.004
Scopus记录号: 2-s2.0-84941219064
论文题名: Effects of silvicultural treatments on temporal variations of spatial autocorrelation in Eucalyptus plantations in Brazil
作者: Kim T.J. ; Bullock B.P. ; Stape J.L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 358 起始页码: 90
结束页码: 97
语种: 英语
英文关键词: Competition
; Fertilization
; Irrigation
; Microsite environment
; Moran's I
; Stand structure
Scopus关键词: Biomass
; Competition
; Forestry
; Irrigation
; Rotation
; Eucalyptus plantations
; Fertilization
; Heterogeneous structures
; Microsite
; Neighborhood structure
; Silvicultural treatments
; Spatial autocorrelations
; Stand structures
; Autocorrelation
; Eucalyptus
英文摘要: We examined the change in spatial structures of Eucalyptus plantations across different types of silvicultural treatments over a full rotation. Clonal and seed-origin Eucalyptus plots applied with differing levels of fertilization (high vs. traditional) and irrigation (irrigated vs. non-irrigated) treatments were investigated. Additionally, for the clonal plots, uniform vs. heterogeneous stand structure treatments were created using staggered planting dates. The heterogeneous structure of the clonal plots aimed to mimic the seed-origin plots. Spatial structures were characterized by assessing the spatial autocorrelations of diameters, heights, and biomass. We also applied two distance-based neighborhood structures to look at the degree of change in spatial autocorrelations with different numbers of neighboring trees being defined as neighbors. The results suggest that spatial autocorrelations of diameters, heights, and biomass of Eucalyptus plantations were mostly insignificant at an alpha level of 0.05 over the rotation. However, spatial autocorrelations in most plots after the middle of the rotation were predominantly negative, indicating the occurrence of size differences among neighboring trees. In particular, general declining patterns from positive to negative spatial autocorrelations in diameters and biomass, except for plots with the heterogeneous stand structures, were noted at plots treated with high levels of fertilizer. This suggests that high fertilization may have influenced the realizations of microsite effects in the early stage of stand development. General trends in spatial autocorrelations between the two neighborhood structures considered were mostly similar except for several plots differing in intensities of spatial autocorrelations over the rotation. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65237
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States; Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States; Suzano Pulp and Paper, Mucuri, Bahia, Brazil
Recommended Citation:
Kim T.J.,Bullock B.P.,Stape J.L.. Effects of silvicultural treatments on temporal variations of spatial autocorrelation in Eucalyptus plantations in Brazil[J]. Forest Ecology and Management,2015-01-01,358