Leaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril)

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dc.creatorEstefany Johana Alzate-Marin
dc.creatorLuis Jairo Toro-Restrepo
dc.creatorJuly Andrea Suárez-Gómez
dc.date2024
dc.date.accessioned2026-07-07T03:30:57Z
dc.descriptionThis study analyzed the leaf spectral response of three native timber forest species in the tropical dry forest: Diomate (Astronium graveolens Jacq.), Choibá (Dipteryx oleifera Benth.), and Algarrobo (Hymenaea courbaril L.). The study was conducted at the León Morales Soto Arboretum and Palmetum, at the Universidad Nacional de Colombia in Medellín, Antioquia, Colombia. Spectral data from the leaves were collected in situ using the portable spectroradiometer ASD FieldSpec HandHeld-2, which operates with a spectral resolution of 1 nm (resampled to 10 nm) and covers a spectral range between 325 and 1,075 nm (limited to 400-900 nm). Based on the measurements, the behavior and spectral variability of the species were evaluated. One-factor Analysis of Variance and Mann-Whitney-Wilcoxon U-test were implemented in reflectance spectra to select the optimal narrow bands for species discrimination. The classification capacity of the selected narrow bands was assessed using the K-nearest neighbors' algorithm. It was found that A. graveolens and H. courbaril exhibited spectral signatures typical of healthy vegetation, while D. oleifera showed spectral changes during the early stages of senescence. Regarding spectral separability, 23 narrow bands in the visible region and near-infrared region were identified as optimal for distinguishing the plant species. The supervised classification algorithm applied to these 23 narrow bands achieved an overall accuracy of 95.8%. In conclusion, these findings provide valuable insights into the spectral response of important tropical species and contribute to their conservation efforts by enhancing understanding of their unique spectral characteristics in diverse and heterogeneous ecosystems like tropical forests.
dc.formatapplication/pdf
dc.identifier0304-2847
dc.identifierhttps://www.redalyc.org/articulo.oa?id=179980940010
dc.identifierhttps://www.redalyc.org/journal/1799/179980940010/
dc.identifierhttps://www.redalyc.org/journal/1799/179980940010/html/
dc.identifierhttps://www.redalyc.org/journal/1799/179980940010/179980940010.epub
dc.identifierhttps://www.redalyc.org/journal/1799/179980940010/movil
dc.identifier10.15446/rfnam.v77n3.112180
dc.identifier.urihttp://hdl.handle.net/123456789/436074
dc.languageen
dc.publisherUniversidad Nacional de Colombia
dc.relationhttp://www.redalyc.org/revista.oa?id=1799
dc.rightsRevista Facultad Nacional de Agronomía - Medellín
dc.sourceRevista Facultad Nacional de Agronomía - Medellín (Colombia) Num.3 Vol.77
dc.subjectAgrociencias
dc.titleLeaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril)
dc.typeartículo científico

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Revista Facultad Nacional de Agronomía - Universidad Nacional de Colombia