DOI: 10.1016/j.foreco.2016.05.006
Scopus记录号: 2-s2.0-84966593819
论文题名: Using excess greenness and green chromatic coordinate colour indices from aerial images to assess lodgepole pine vigour, mortality and disease occurrence
作者: Reid A.M. ; Chapman W.K. ; Prescott C.E. ; Nijland W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 374 起始页码: 146
结束页码: 153
语种: 英语
英文关键词: Colour indices
; Disease occurrence
; Excess greenness
; Green chromatic coordinate
; Mortality
; Stand health
Scopus关键词: Forestry
; Health
; Regression analysis
; Above ground level
; British Columbia , Canada
; Canopy closures
; Chromatic coordinate
; Excess greenness
; Foliar nitrogen
; Linear regression models
; Mortality
; Color
; aerial photograph
; color
; concentration (composition)
; coniferous tree
; coordinate
; disease incidence
; feasibility study
; index method
; mortality
; nitrogen
; regression analysis
; symptom
; British Columbia
; Canada
; Peridermium sp. 'Ysgr-4'
; Pinus contorta
英文摘要: Here, we test the feasibility of using two colour indices to assess differences in stand-health metrics in 54 plots of lodgepole pine in British Columbia, Canada. Colour indices of excess greenness (EG) and green chromatic coordinate (GCC) were calculated over two spatial scales from colour images captured from a Cessna T210 flying at 600 m above ground level. EG and GCC were then compared to five ground-based metrics of stand health: vigour, mortality, foliar disease occurrence, western gall rust occurrence, and root disease symptoms. Colour indices, calculated at both tree and plot scales, significantly related to the ground-based metrics of stand health, except western gall rust occurrence. These relationships were influenced by canopy closure, but were unaffected by foliar nitrogen concentration. Using linear regression models, ground-based stand-health metrics accounted for 36.5-60.9% of the variability in colour indices. Within research projects, EG and GCC values could be used to set thresholds below which ground-checks of stand health would be warranted. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64867
Appears in Collections: 影响、适应和脆弱性
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作者单位: University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada; BC Ministry of Forests, Lands and Natural Resource Operations, 200-640 Borland Street, Williams Lake, BC, Canada
Recommended Citation:
Reid A.M.,Chapman W.K.,Prescott C.E.,et al. Using excess greenness and green chromatic coordinate colour indices from aerial images to assess lodgepole pine vigour, mortality and disease occurrence[J]. Forest Ecology and Management,2016-01-01,374