Estimation of leaf area index in eucalypt forest using digital photography

By Craig Macfarlane, M. Hoffman, Derek Eamus, N. Kerp, S. Higginson, Ross McMurtrie, M. Adams. 2007

277 citations recorded by the source corpus.

Subfields: Ecology, Global and Planetary Change, Plant Science

View Paper: https://www.semanticscholar.org/paper/8ec95dcd5415da9f1b5450893f5c0cd434ea6c35

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In Ecology

In Global and Planetary Change

In Plant Science

Citations in the corpus

Cover plus: ways of measuring plant canopies and the terms used for them (2011, background): “However, approximate values of clumping are available for particular vegetation types, and estimates of leaf angle can be made from images taken at different angles from the vertical, from below the canopy (Macfarlane et al. 2007) or from above it (Pisek et al.”
Comparison of methods for measuring gap size distribution and canopy nonrandomness at Järvselja RAMI (RAdiation transfer Model Intercomparison) test sites (2011, methodology): “Considerable differnces were observed between the approaches to quantify˝E (e.g. alter et al., 2003; Leblanc et al., 2005; Macfarlane et al., 2007; onsamo and Pellikka, 2009), yet the role of important factors, uch as the common practice of assuming spherical leaf projecion function, the choice of…”
Digital canopy photography: Exposed and in the raw (2014, methodology): “To satisfy this ssumption the gamma value of in-camera JPG images has been ack-corrected in previous studies (e.g. Macfarlane et al., 2007b); owever, our comparison of gamma-adjusted raw data and inamera JPG images suggests that in-camera processing results in ore substantial alteration of digital…”
GAI estimates of row crops from downward looking digital photos taken perpendicular to rows at 57.5° zenith angle: Theoretical considerations based on 3D architecture models and application to wheat crops (2010, background): “The computation of the corresponding ‘true’ LAI is still an open question that has already been addressed by several authors (Chen and Cihlar, 1995; Nilson, 1999; Jonckheere et al., 2006; Lang et al., 1985; Leblanc et al., 2005; Macfarlane et al., 2007).”
Estimating seasonal variations of leaf area index using litterfall collection and optical methods in four mixed evergreen–deciduous forests (2015, methodology): “The digital hemispherical photography (DHP) and the LAI-2000 plant canopy analyzer are two of the most commonly used devices (Chen et al., 2006; Macfarlane et al., 2007b; Chianucci and Cutini, 2013).”
Estimation of leaf area index in eucalypt forest with vertical foliage, using cover and fullframe fisheye photography (2007, unknown): “marginata stands (Macfarlane et al., 2007), and using fisheye photography to obtain the gap fraction should reduce the intensity of sampling required compared to that used by Macfarlane et al.”
Estimation of leaf area and clumping indexes of crops with hemispherical photographs (2008, methodology): “Leblanc et al. (2005) and Macfarlane et al. (2007) showed that the clumping index – and then the LAI – was better retrieved for coniferous and eucalypt forests respectively when combining the gap size distribution and the Lang and Xiang averaging methods (Chen and Cihlar, 1995b; Leblanc et al.,…”
On the correct estimation of effective leaf area index: does it reveal information on clumping effects? (2010, methodology): “The TRAC CC method has been widely used to quantify VE but critical appraisal of this method has been rare (Macfarlane et al., 2007; Ryu et al., 2010).”