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Assessing foliar chlorophyll contents with the SPAD-502 chlorophyll meter: a calibration test with thirteen tree species of tropical rainforest in French Guiana

Coste, S; Baraloto, C; Leroy, C; Marcon, E; Renaud, A; Richardson, AD; Roggy, JC; Schimann, H; Uddling, J and Herault, B (2010) In Annals of Forest Science 67(6). p.607-607
Abstract
Chlorophyll meters such as the SPAD-502 offer a simple, inexpensive and rapid method to estimate foliar chlorophyll content. However, values provided by SPAD-502 are unitless and require empirical calibrations between SPAD units and extracted chlorophyll values. Leaves of 13 tree species from the tropical rain forest in French Guiana were sampled to select the most appropriate calibration model among the often-used linear, polynomial and exponential models, in addition to a novel homographic model that has a natural asymptote. The homographic model best accurately predicted total chlorophyll content (mu g cm(-2)) from SPAD units (R(2) = 0.89). Interspecific differences in the homographic model parameters explain less than 7% of the... (More)
Chlorophyll meters such as the SPAD-502 offer a simple, inexpensive and rapid method to estimate foliar chlorophyll content. However, values provided by SPAD-502 are unitless and require empirical calibrations between SPAD units and extracted chlorophyll values. Leaves of 13 tree species from the tropical rain forest in French Guiana were sampled to select the most appropriate calibration model among the often-used linear, polynomial and exponential models, in addition to a novel homographic model that has a natural asymptote. The homographic model best accurately predicted total chlorophyll content (mu g cm(-2)) from SPAD units (R(2) = 0.89). Interspecific differences in the homographic model parameters explain less than 7% of the variation in chlorophyll content in our data set. The utility of the general homographic model for a variety of research and management applications clearly outweighs the slight loss of model accuracy due to the abandon of the species' effect. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
chlorophyll estimate, model calibration, homographic functions, neotropical trees
in
Annals of Forest Science
volume
67
issue
6
pages
607 - 607
publisher
EDP Sciences
external identifiers
  • scopus:77950216355
ISSN
1286-4560
DOI
10.1051/forest/2010020
project
BECC
language
English
LU publication?
no
id
d4315edf-f0e6-426a-8949-5fc2f0d36505 (old id 4448776)
date added to LUP
2014-05-23 12:11:31
date last changed
2018-07-15 03:09:52
@article{d4315edf-f0e6-426a-8949-5fc2f0d36505,
  abstract     = {Chlorophyll meters such as the SPAD-502 offer a simple, inexpensive and rapid method to estimate foliar chlorophyll content. However, values provided by SPAD-502 are unitless and require empirical calibrations between SPAD units and extracted chlorophyll values. Leaves of 13 tree species from the tropical rain forest in French Guiana were sampled to select the most appropriate calibration model among the often-used linear, polynomial and exponential models, in addition to a novel homographic model that has a natural asymptote. The homographic model best accurately predicted total chlorophyll content (mu g cm(-2)) from SPAD units (R(2) = 0.89). Interspecific differences in the homographic model parameters explain less than 7% of the variation in chlorophyll content in our data set. The utility of the general homographic model for a variety of research and management applications clearly outweighs the slight loss of model accuracy due to the abandon of the species' effect.},
  author       = {Coste, S and Baraloto, C and Leroy, C and Marcon, E and Renaud, A and Richardson, AD and Roggy, JC and Schimann, H and Uddling, J and Herault, B},
  issn         = {1286-4560},
  keyword      = {chlorophyll estimate,model calibration,homographic functions,neotropical trees},
  language     = {eng},
  number       = {6},
  pages        = {607--607},
  publisher    = {EDP Sciences},
  series       = {Annals of Forest Science},
  title        = {Assessing foliar chlorophyll contents with the SPAD-502 chlorophyll meter: a calibration test with thirteen tree species of tropical rainforest in French Guiana},
  url          = {http://dx.doi.org/10.1051/forest/2010020},
  volume       = {67},
  year         = {2010},
}