Evaluation of digital and film hemispherical photography and spherical densiometry for measuring forest light environments.
By S. Englund, Joseph John O’Brien, David B. Clark. 2000
218 citations recorded by the source corpus.
Subfields: Ecology, Environmental Engineering, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/5135bab7ce914dfa57216a0e4b735c0cb79fbad0
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In Ecology
In Environmental Engineering
- R. Hall
- G. Jin
- Richard A. Fournier
- Zhili Liu
- Jing M. Chen
- Yujiao Qi
- Nathalie Bréda
- Andreas Matzarakis
In Global and Planetary Change
Citations in the corpus
- Disentangling the selective factors that act on male colour in wild guppies (2006, unknown): “At each site, canopy openness was quantified with a concave spherical densiometer (Lemmon 1957), which generates openness estimates comparable to those obtained by hemispherical photography (Englund et al. 2000).”
- Forest canopy cover and canopy closure: comparison of assessment techniques (2009, unknown): “The spherical densiometer is a simple instrument for estimating canopy closure comprising a convex or concave mirror etched with a grid of 24 squares, within each of which the observer scores canopy closure at four equally spaced points (Englund et al. 2000).”
- Estimating forest canopy bulk density using six indirect methods (2005, background): “Hemispherical photography (hemiphoto) is gaining popularity for the computation of leaf area and the exploration of canopy light dynamics (Neumann et al. 1989; Englund et al. 2000; Frazer et al. 2001).”
- Estimating leaf area index in different types of mature forest stands in Switzerland: a comparison of methods (2010, background): “Digital photography has been shown to provide higher estimates of canopy openness than film photography (Englund et al. 2000; Frazer et al. 2001; Nobis and Hunziker 2005).”
- A comparison of digital and film fisheye photography for analysis of forest canopy structure and gap light transmission (2001, background): “Despite many of these apparent advantages, very few studies have been designed to investigate the possible drawbacks or limitations of using consumergrade digital cameras for scientific applications like hemispherical canopy photography (e.g. Englund et al., 2000).”
- Estimating seasonal variations of leaf area index using litterfall collection and optical methods in four mixed evergreen–deciduous forests (2015, background): “Additionally, a considerable error in DHP LAI measurements lies with the automatic exposure setting often used when photographing canopies (Chen et al., 1991; Englund et al., 2000; Pueschel et al., 2012).”
- Light Heterogeneity and Plants: from Ecophysiology to Species Coexistence and Biodiversity (2003, background): “…scription of the light environ- (quantity and quality of light available for ment: hemispherical photogra- plants, temporal dynamics, spatial heterogene phy, miniaturized data-loggers ity) in natural habitats (Canham et al. 1990) and light sensors (Pontailler and Genty 1996; Englund et al. 2000) 2.”