Leaf spectra and weight of species in canopy, subcanopy, and understory layers in a Venezuelan Andean Cloud Forest

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Article discussing leaf spectra and the weight of species in canopy, subcanopy, and understory layers in a Venezuelan Andean cloud forest.

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15 p.

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Acevedo, Miguel F. & Ataroff, Michele 2012.

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This article is part of the collection entitled: UNT Scholarly Works and was provided by UNT College of Engineering to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 188 times . More information about this article can be viewed below.

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Article discussing leaf spectra and the weight of species in canopy, subcanopy, and understory layers in a Venezuelan Andean cloud forest.

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15 p.

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Abstract: We characterize the leaf spectra of tree species of an Andean cloud forest in Venezuela, grouped according to position in canopy, subcanopy and understory. We measured leaf reflectance and transmittance spectra in the 400-750 nm range using a high-resolution spectrometer. Both signals were subtracted from unity to calculate the absorbance signal. Nine spectral variables were calculated for each signal, three based on wide-bands and six based on features. We measured leaf mass per unit area of all species, and calculated efficiency of absorbance, as ratio of absorbance in photosynthetic range over leaf mass. Differences among groups were significant for several absorbance and transmittance variables, leaf mass, and efficiency of absorbance. The clearest differences are between canopy and understory species. There is strong correlation for at least one pair of band variables for each signal, and each band variable is strongly correlated with at least one feature variable for most signals. High canonical correlations are obtained between pairs of the three canonical axes for bands and the first three canonical axes for features. Absorbance variables produce species clusters having the closest correspondence to the species groups. Linear discriminant analysis shows that species groups can be sorted by all signals, particularly absorbance.

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  • Scientifica, 2012, Nasr City: Hindawi Publishing Corporation

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  • Publication Title: Scientifica
  • Volume: 2012
  • Pages: 14
  • Peer Reviewed: Yes

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  • 2012

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  • June 6, 2014, 11:19 a.m.

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  • May 11, 2015, 1:33 p.m.

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Acevedo, Miguel F. & Ataroff, Michele. Leaf spectra and weight of species in canopy, subcanopy, and understory layers in a Venezuelan Andean Cloud Forest, article, 2012; [Nasr City, Cairo]. (digital.library.unt.edu/ark:/67531/metadc287995/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Engineering.