DOI: 10.1016/j.foreco.2017.01.023
Scopus记录号: 2-s2.0-85012249348
论文题名: Modeling and predicting solar radiation transmittance in mixed forests at a within-stand scale from tree species basal area
作者: Perot T. ; Mårell A. ; Korboulewsky N. ; Seigner V. ; Balandier P.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 390 起始页码: 127
结束页码: 136
语种: 英语
英文关键词: Beer-Lambert law
; Hemispherical photography
; Light
; Mixed forest
; Pinus sylvestris
; Quercus petraea
Scopus关键词: Ecosystems
; Forecasting
; Light
; Photography
; Random processes
; Reforestation
; Solar radiation
; Beer Lambert law
; Hemispherical photography
; Mixed forests
; Pinus sylvestris
; Quercus petraea
; Forestry
; absorption
; basal area
; canopy architecture
; coniferous tree
; deciduous tree
; ecological modeling
; extinction coefficient
; forest ecosystem
; forest management
; light availability
; mixed forest
; photography
; silviculture
; solar radiation
; Pinus sylvestris
; Quercus petraea
英文摘要: Light under tree canopy cover is essential for the study and understanding of plant diversity, regeneration, plant growth and many other forest ecosystem processes; however, quantifying light is difficult and requires specialized equipment. That is why proxies or models predicting light availability can help scientists to obtain estimates of transmittance and forest managers to better assess and adjust silvicultural practices at a reasonable cost. The main objective of our research was to develop a model to predict local solar radiation transmittance from species basal area in mono-specific and mixed stands of sessile oak (Quercus petraea) and Scots pine (Pinus sylvestris). Models based on the Beer-Lambert law were fitted and compared using 163 measures of solar radiation transmittance obtained from hemispherical photographs and light sensors. In mono-specific stands, local transmittance was predicted by local basal area considered on a radius equaling approximately tree height. In mixed stands, the same model broken down into its mono-specific components (local basal area of each species multiplied by their own extinction coefficients) predicted transmittance well. The extinction coefficients we obtained were very close to those previously established for these species and did not differ between mono-specific and mixed stands. Our model explained 77% of the variation in transmittance when random effects were included and 64% of the variance without taking into account these random effects. The predictive value of the model was good with high accuracy (mean signed deviation not significantly different from zero) and a fairly high precision (relative mean absolute error = 20%). The fact that tree canopy transmittance in mixed stands can be predicted by extinction coefficients obtained from mono-specific stands indicates that modifications in crown structure and leaf distribution are only slight, or even non-existent, when the two species grow in a mixture. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64455
Appears in Collections: 影响、适应和脆弱性
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作者单位: Irstea, UR Ecosystèmes Forestiers, Domaine des Barres, Nogent-sur-Vernisson, France
Recommended Citation:
Perot T.,Mårell A.,Korboulewsky N.,et al. Modeling and predicting solar radiation transmittance in mixed forests at a within-stand scale from tree species basal area[J]. Forest Ecology and Management,2017-01-01,390