Leaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril)
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| Format: | Artículo científico |
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Universidad Nacional de Colombia
2024
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| author | Estefany Johana Alzate-Marin |
| author_facet | Estefany Johana Alzate-Marin |
| contents | Leaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril) Estefany Johana Alzate-Marin Luis Jairo Toro-Restrepo July Andrea Suárez-Gómez Agrociencias Leaves Separability Classification Tropical forest Spectroradiometry This 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. 2024 artículo científico 0304-2847 https://www.redalyc.org/articulo.oa?id=179980940010 https://www.redalyc.org/journal/1799/179980940010/ https://www.redalyc.org/journal/1799/179980940010/html/ https://www.redalyc.org/journal/1799/179980940010/179980940010.epub https://www.redalyc.org/journal/1799/179980940010/movil 10.15446/rfnam.v77n3.112180 en http://www.redalyc.org/revista.oa?id=1799 Revista Facultad Nacional de Agronomía - Medellín application/pdf Universidad Nacional de Colombia Revista Facultad Nacional de Agronomía - Medellín (Colombia) Num.3 Vol.77 |
| format | Artículo científico |
| id | redalyc_179980940010 |
| institution | Redalyc |
| language | en |
| publishDate | 2024 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Leaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril) Estefany Johana Alzate-Marin Agrociencias Leaves Separability Classification Tropical forest Spectroradiometry Leaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril) Estefany Johana Alzate-Marin Luis Jairo Toro-Restrepo July Andrea Suárez-Gómez Agrociencias Leaves Separability Classification Tropical forest Spectroradiometry This 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. 2024 artículo científico 0304-2847 https://www.redalyc.org/articulo.oa?id=179980940010 https://www.redalyc.org/journal/1799/179980940010/ https://www.redalyc.org/journal/1799/179980940010/html/ https://www.redalyc.org/journal/1799/179980940010/179980940010.epub https://www.redalyc.org/journal/1799/179980940010/movil 10.15446/rfnam.v77n3.112180 en http://www.redalyc.org/revista.oa?id=1799 Revista Facultad Nacional de Agronomía - Medellín application/pdf Universidad Nacional de Colombia Revista Facultad Nacional de Agronomía - Medellín (Colombia) Num.3 Vol.77 |
| title | Leaf spectrum analysis of three tropical timber species: Diomate ( Astronium graveolens), Choibá (Dipteryx oleifera), and Algarrobo (Hymenaea courbaril) |
| topic | Agrociencias Leaves Separability Classification Tropical forest Spectroradiometry |
| url | https://www.redalyc.org/articulo.oa?id=179980940010 https://www.redalyc.org/journal/1799/179980940010/ https://www.redalyc.org/journal/1799/179980940010/html/ https://www.redalyc.org/journal/1799/179980940010/179980940010.epub https://www.redalyc.org/journal/1799/179980940010/movil |