DOI: 10.1016/j.foreco.2014.09.028
Scopus记录号: 2-s2.0-84908542694
论文题名: Inter-annual variability and spatial coherence of net primary productivity across a western Oregon Cascades landscape
作者: Woolley T.J. ; Harmon M.E. ; O'Connell K.B.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 335 起始页码: 60
结束页码: 70
语种: 英语
英文关键词: Climate
; Forests
; LTER
; Net primary productivity
; Pacific northwest
; Spatial coherence
Scopus关键词: Climate
; Forests
; LTER
; Net primary productivity
; Pacific Northwest
; Spatial coherence
; age class
; annual variation
; climate change
; land use change
; net primary production
; phytomass
; spatial analysis
; Cascade Range
; Oregon
; United States
英文摘要: Inter-annual variability (IAV) of forest Net Primary Productivity (NPP) is a function of both extrinsic (e.g., climate) and intrinsic (e.g., stand dynamics) drivers. As estimates of NPP in forests are scaled from trees to stands to the landscape, an understanding of the relative effects of these factors on spatial and temporal behavior of NPP is important. Although a high degree of spatial coherence (i.e., the degree of spatial synchrony over time) is often assumed, this inherent behavior is rarely examined. Quantifying this term may improve future predictions as site-level estimates are scaled up spatially. We quantified the spatial coherence of bole biomass production (BBP) within and between trees, and bole-related NPP (NPPB) between sites of varying age, elevation, moisture, and species composition across a forested landscape in the western Cascade Range of Oregon. Within sites, individual trees with lower than average BBP were the most coherent. IAV of BBP increased as average tree BBP increased and spatial coherence was reduced. Among sites, NPPB was the most spatially coherent (r=0.92) between young sites, while older sites and comparisons between age classes revealed a much larger range in spatial coherence (r=-0.18 to 0.85). Our findings indicate climate variability may be of greater importance for spatial coherence between young sites, and that intrinsic factors could be decreasing spatial coherence between older sites or sites not in close proximity. The wide range in spatial coherence between sites found in this study, coupled with the complex land use history patterns across forested landscapes, has significant implications for modeling and scaling of NPP. © 2014 Published by Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65641
Appears in Collections: 影响、适应和脆弱性
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作者单位: The Nature Conservancy, Arizona Chapter, United States; Department of Forest Ecosystems and Society, Oregon State University, United States; Oregon Natural Resource Education Program, Forestry Extension, Oregon State University, United States
Recommended Citation:
Woolley T.J.,Harmon M.E.,O'Connell K.B.. Inter-annual variability and spatial coherence of net primary productivity across a western Oregon Cascades landscape[J]. Forest Ecology and Management,2015-01-01,335