Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations
Background and Aims: Cedrela odorata (Spanish cedar) is a tropical tree native to America with an important international trade market. In this study, the morphological variation of C. odorata was compared among three conditions: logging, plantations, and natural populations, with the objective to e...
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| Fformat: | Online |
| Iaith: | eng |
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Instituto de Ecología, A.C.
2018
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| Mynediad Ar-lein: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1330 |
| _version_ | 1799771337113206784 |
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| author | Galván-Hernández, Dulce María Macedo-Villareal, Manuel Alejandro Núñez de Cáceres-González, Francisco Federico Sánchez-González, Arturo Octavio-Aguilar, Pablo |
| author_facet | Galván-Hernández, Dulce María Macedo-Villareal, Manuel Alejandro Núñez de Cáceres-González, Francisco Federico Sánchez-González, Arturo Octavio-Aguilar, Pablo |
| author_sort | Galván-Hernández, Dulce María |
| collection | ABM |
| description | Background and Aims: Cedrela odorata (Spanish cedar) is a tropical tree native to America with an important international trade market. In this study, the morphological variation of C. odorata was compared among three conditions: logging, plantations, and natural populations, with the objective to evaluate the current condition of managed populations after harvesting and in plantations, in contrast to relatively well-preserved populations.Methods: Two sites were chosen for each condition. The population density and four morphological attributes were measured: diameter at breast height, height, angle of branch insertion and crown form. A multivariate approach was used to compare the morphological variation among conditions (generalized discriminant factors analysis) and determine total variation distributed among size classes (cluster analysis), as well as assignment of these classes to each condition (canonical correspondence analysis).Key results: Four significantly different size classes were identified among all populations with specific association to condition. Strongest correlations were between highest trees with natural populations and small trees with plantations. Forest management, including harvesting and plantation conditions, reduced the phenotypical variation and modified the dasometrical attributes of C. odorata. The logging of the better shaped phenotypes increased the smaller size trees frequency compared to commercial size individuals, and changed the forest composition favoring small categories.Conclusions: The forest exploitation generates homogenization in median height-class and the plantation in lower height-class. In both cases, the harvestable trees are scarce, even after 20 years of management; and they are non-existent in plantations of 15 years. These results suggest that the removal of the highest trees, as well as forest plantations, are not being effective to wood production since they do not reach commercial sizes in the time of recovery or projected growth. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1330 |
| institution | Acta Botanica Mexicana |
| language | eng |
| publishDate | 2018 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-13302022-11-26T07:00:35Z Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations Variación morfológica de Cedrela odorata (Meliaceae): contraste entre poblaciones naturales y con manejo Galván-Hernández, Dulce María Macedo-Villareal, Manuel Alejandro Núñez de Cáceres-González, Francisco Federico Sánchez-González, Arturo Octavio-Aguilar, Pablo dasometry forestry management impact wood harvesting cosecha de madera dasometría impacto del manejo silvicultura Background and Aims: Cedrela odorata (Spanish cedar) is a tropical tree native to America with an important international trade market. In this study, the morphological variation of C. odorata was compared among three conditions: logging, plantations, and natural populations, with the objective to evaluate the current condition of managed populations after harvesting and in plantations, in contrast to relatively well-preserved populations.Methods: Two sites were chosen for each condition. The population density and four morphological attributes were measured: diameter at breast height, height, angle of branch insertion and crown form. A multivariate approach was used to compare the morphological variation among conditions (generalized discriminant factors analysis) and determine total variation distributed among size classes (cluster analysis), as well as assignment of these classes to each condition (canonical correspondence analysis).Key results: Four significantly different size classes were identified among all populations with specific association to condition. Strongest correlations were between highest trees with natural populations and small trees with plantations. Forest management, including harvesting and plantation conditions, reduced the phenotypical variation and modified the dasometrical attributes of C. odorata. The logging of the better shaped phenotypes increased the smaller size trees frequency compared to commercial size individuals, and changed the forest composition favoring small categories.Conclusions: The forest exploitation generates homogenization in median height-class and the plantation in lower height-class. In both cases, the harvestable trees are scarce, even after 20 years of management; and they are non-existent in plantations of 15 years. These results suggest that the removal of the highest trees, as well as forest plantations, are not being effective to wood production since they do not reach commercial sizes in the time of recovery or projected growth. Antecedentes y Objetivos: Cedrela odorata (cedro) es un árbol tropical nativo de América con un importante mercado internacional. En el presente estudio, se comparó la variación morfológica de C. odorata en tres condiciones: bajo extracción, plantaciones y poblaciones naturales, con el objetivo de evaluar la condición actual de las poblaciones después de la extracción y en plantaciones, en contraste con las poblaciones relativamente bien conservadas.Métodos: Se eligieron dos sitios para cada condición. Se midió la densidad poblacional y cuatro atributos morfológicos: diámetro a la altura del pecho, altura, ángulo de inserción de las ramas y forma de la copa. Se usó una aproximación multivariada para comparar la variación morfológica entre condiciones (análisis de funciones discriminantes generalizado), y para determinar la variación total distribuida entre clases de talla (análisis de agrupamiento); además, se asignaron esas clases a cada condición (análisis de correspondencias canónicas).Resultados clave: En todas las poblaciones fueron identificadas cuatro clases de talla significativamente distintas. Las correlaciones más fuertes fueron entre los árboles más grandes con las poblaciones naturales y los más pequeños con las plantaciones. El manejo forestal, que incluye las condiciones bajo extracción y las plantaciones, redujo la variación fenotípica y modificó los atributos dasométricos de C. odorata. La extracción de fenotipos mejor conformados incrementa la frecuencia de árboles de menor talla, respecto a individuos de tamaño comercial, y cambia la composición del bosque favoreciendo las categorías pequeñas.Conclusiones: El aprovechamiento forestal genera homogenización en clases de talla mediana, en cambio, en las plantaciones se homogenizan las clases de menor tamaño. En ambos casos, los árboles cosechables son escasos, aún después de 20 años de manejo, y no existen en cultivos de 15 años. Estos resultados sugieren que la remoción de los árboles más grandes, así como las plantaciones forestales, no son efectivas para la producción de madera puesto que no se encontraron árboles de tallas comerciales en el tiempo de recuperación o crecimiento proyectado. Instituto de Ecología, A.C. 2018-10-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf text/html https://abm.ojs.inecol.mx/index.php/abm/article/view/1330 10.21829/abm125.2018.1330 Acta Botanica Mexicana; No. 125 (2018); 157-171 Acta Botanica Mexicana; Núm. 125 (2018); 157-171 2448-7589 0187-7151 eng https://abm.ojs.inecol.mx/index.php/abm/article/view/1330/pdf_1 https://abm.ojs.inecol.mx/index.php/abm/article/view/1330/html Derechos de autor 2018 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Galván-Hernández, Dulce María Macedo-Villareal, Manuel Alejandro Núñez de Cáceres-González, Francisco Federico Sánchez-González, Arturo Octavio-Aguilar, Pablo Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations |
| title | Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations |
| title_full | Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations |
| title_fullStr | Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations |
| title_full_unstemmed | Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations |
| title_short | Morphological variation of Cedrela odorata (Meliaceae): contrast between natural and managed populations |
| title_sort | morphological variation of cedrela odorata (meliaceae): contrast between natural and managed populations |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1330 |
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