DOI: 10.1016/j.foreco.2013.05.052
Scopus记录号: 2-s2.0-84880418106
论文题名: Scaling litter fall in complex terrain: A study from the western Cascades Range, Oregon
作者: Peterson F.S. ; Sexton J. ; Lajtha K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 306 起始页码: 118
结束页码: 127
语种: 英语
英文关键词: Complex terrain
; Kriging
; Litterfall
; Net primary productivity
; Scaling
Scopus关键词: Complex terrains
; Kriging
; Litterfalls
; Net primary productivity
; Scaling
; Ecosystems
; Estimation
; Interpolation
; Landforms
; Measurements
; Normal distribution
; Watersheds
; Forestry
; complex terrain
; coniferous forest
; kriging
; lidar
; litterfall
; net primary production
; probability
; Ecosystems
; Forest Litter
; Forestry
; Productivity
; Water Sheds
; Wood Measurement
; Cascade Range
; Oregon
; United States
英文摘要: Non-normally distributed variation in vegetation and topography can make estimates of litter fall based on simple mathematical scaling of randomly placed litter traps inaccurate. It has been shown that litter fall is directly related to aboveground net primary productivity (ANPP), which can be calculated from remote metrics (such as LiDAR returns) and/or measured at a high resolution (based on inventory plots). Extrapolating litter fall to a landscape scale with ANPP as a cross-correlate may increase the reliability of estimates. However, the differences in landscape-scale litter flux estimates due to scaling method have not been quantified. We collected litter from 16 plots on a small (96ha) watershed in the western Cascades Range of Oregon over 2years. We related litter fall to ANPP (R2=0.65), which was calculated from 133 long term re-measurement plots on a forest currently dominated (70-80%) by Pseudotsuga menziesii and Tsuga heterophylla of approximately 50years of age and used four methods of scaling, (1) multiplying mean measured litter fall per hectare by watershed area, (2) randomly selecting and summing variates from the probability distribution, (3) kriging field-measured litter and (4) supplementing our field measurements of litter with modeled litter based on the ANPP to litter relationship and then kriging. We found that (1) longer term averages of litter are more robust when compared to measurements and modeled estimates, and (2) the appearance of "hot spots" of elevated litter fall corresponding to undersampled areas of the complex terrain disappeared when the field measurements were supplemented with ANPP. In complex terrain, longer-term experiments supplemented with high-resolution productivity data may increase the reliability and interpretability of litter fall estimates. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66429
Appears in Collections: 影响、适应和脆弱性
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作者单位: College of Forestry, Oregon State University, 324 Richardson Hall, Corvallis, OR 97333, United States; College of Agriculture and Life Science, Oregon State University, 3000 ALS Hall, Corvallis, OR 97333, United States
Recommended Citation:
Peterson F.S.,Sexton J.,Lajtha K.. Scaling litter fall in complex terrain: A study from the western Cascades Range, Oregon[J]. Forest Ecology and Management,2013-01-01,306