Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador
The dry forest plays an important role in the conservation of the world's greatest biodiversity and in the understanding of its dynamics and structure. However, it is highly vulnerable to contemporary anthropogenic ecological threats. For this reason, analysis of its impact on the structural ri...
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| Formato: | Artículo revista |
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Facultad de Ciencias Agronómicas - UNR
2025
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| Acceso en línea: | https://cienciasagronomicas.unr.edu.ar/index.php/agro/article/view/94 |
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I15-R223-article-94 |
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Universidad Nacional de Rosario |
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I-15 |
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R-223 |
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Ciencias Agronómicas |
| language |
Español |
| format |
Artículo revista |
| topic |
inventario parcelas índices de riqueza inventory plots richness indices inventário parcelas índices de riqueza |
| spellingShingle |
inventario parcelas índices de riqueza inventory plots richness indices inventário parcelas índices de riqueza Cabrera-Verdesoto, César Alberto Martens-Aguayo , Kevin Ariel Briones-Anchundia, Gema Stephanya Cantos-Zambrano, Jennifer Andrea Cali-Ligua, Valeria Lissette Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador |
| topic_facet |
inventario parcelas índices de riqueza inventory plots richness indices inventário parcelas índices de riqueza |
| author |
Cabrera-Verdesoto, César Alberto Martens-Aguayo , Kevin Ariel Briones-Anchundia, Gema Stephanya Cantos-Zambrano, Jennifer Andrea Cali-Ligua, Valeria Lissette |
| author_facet |
Cabrera-Verdesoto, César Alberto Martens-Aguayo , Kevin Ariel Briones-Anchundia, Gema Stephanya Cantos-Zambrano, Jennifer Andrea Cali-Ligua, Valeria Lissette |
| author_sort |
Cabrera-Verdesoto, César Alberto |
| title |
Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador |
| title_short |
Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador |
| title_full |
Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador |
| title_fullStr |
Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador |
| title_full_unstemmed |
Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador |
| title_sort |
structural analysis of the dry forest in the "la tomatera" sector of the portoviejo valley, manabí, ecuador |
| description |
The dry forest plays an important role in the conservation of the world's greatest biodiversity and in the understanding of its dynamics and structure. However, it is highly vulnerable to contemporary anthropogenic ecological threats. For this reason, analysis of its impact on the structural richness of the dry forest in the "La Tomatera" sector of the Portoviejo Valley was permitted. Twenty 20 x 25 m plots of were established at random in a 100-hectare forest fragment; individuals ≥1 cm DBH (1.30 m) and ≤4.99 m height were recorded. These were used to identify forest species, determine richness, horizontal and vertical structure, and estimate the ecological Importance Value Index, and Shannon-Weaver, Simpson, and Margalef’s richness indices, using nonparametric estimators in Estimates 9.1. In the forest inventory, 11 woody species corresponding to 9 botanical families were identified; the vertical and horizontal structure through the ACE and Chao1 accumulation curve showed a representativeness of 92% and 76%, respectively. In addition, its inverted J shape, with individuals mostly in the first diameter and altimetric classes, reflected a forest undergoing a recovery process. The ecological Importance Value Index showed that the most representative species are Ceiba trichistandra (A. Gray) Bakh., Cochlospermum vitifolium (Willd.) Spreng. and Neltuma juliflora (Sw.) Raf. The Shannon-Weaver and Simpson index estimated a diversity between medium and high, and the Margalef index established a low diversity and specific richness of forest species in the dry forest of the "La Tomatera" sector. |
| publisher |
Facultad de Ciencias Agronómicas - UNR |
| publishDate |
2025 |
| url |
https://cienciasagronomicas.unr.edu.ar/index.php/agro/article/view/94 |
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I15-R223-article-942025-12-22T15:35:20Z Structural analysis of the dry forest in the "La Tomatera" sector of the Portoviejo valley, Manabí, Ecuador Análisis estructural y riqueza del bosque seco en el sector “La Tomatera” del valle de Portoviejo, Manabí, Ecuador Análise estrutural da floresta seca no setor "La Tomatera" do vale de Portoviejo, Manabí, Ecuador Cabrera-Verdesoto, César Alberto Martens-Aguayo , Kevin Ariel Briones-Anchundia, Gema Stephanya Cantos-Zambrano, Jennifer Andrea Cali-Ligua, Valeria Lissette inventario parcelas índices de riqueza inventory plots richness indices inventário parcelas índices de riqueza The dry forest plays an important role in the conservation of the world's greatest biodiversity and in the understanding of its dynamics and structure. However, it is highly vulnerable to contemporary anthropogenic ecological threats. For this reason, analysis of its impact on the structural richness of the dry forest in the "La Tomatera" sector of the Portoviejo Valley was permitted. Twenty 20 x 25 m plots of were established at random in a 100-hectare forest fragment; individuals ≥1 cm DBH (1.30 m) and ≤4.99 m height were recorded. These were used to identify forest species, determine richness, horizontal and vertical structure, and estimate the ecological Importance Value Index, and Shannon-Weaver, Simpson, and Margalef’s richness indices, using nonparametric estimators in Estimates 9.1. In the forest inventory, 11 woody species corresponding to 9 botanical families were identified; the vertical and horizontal structure through the ACE and Chao1 accumulation curve showed a representativeness of 92% and 76%, respectively. In addition, its inverted J shape, with individuals mostly in the first diameter and altimetric classes, reflected a forest undergoing a recovery process. The ecological Importance Value Index showed that the most representative species are Ceiba trichistandra (A. Gray) Bakh., Cochlospermum vitifolium (Willd.) Spreng. and Neltuma juliflora (Sw.) Raf. The Shannon-Weaver and Simpson index estimated a diversity between medium and high, and the Margalef index established a low diversity and specific richness of forest species in the dry forest of the "La Tomatera" sector. El bosque seco juega un papel importante para la conservación de la mayor biodiversidad del mundo y el discernimiento de su dinámica y estructura. Sin embargo, es de alta vulnerabilidad antrópica con amenazas ecológicas contemporáneas. Razón por la cual se permitió el análisis en su incidencia a nivel de la riqueza estructural del bosque seco en el sector “La Tomatera” del valle de Portoviejo. Se establecieron 20 parcelas al azar de 20 x 25 m en un fragmento boscoso de 100 hectáreas; se registraron individuos ≥1 cm de DAP1,30 m y alturas desde ≤4,99 m en el que se constituyó la identificación de especies forestales, la determinación de la riqueza, estructura horizontal y vertical, y la estimación de los índices de valor importancia ecológica, Shannon-Weaver, Simpson y riqueza de Margalef con estimadores no paramétricos en Estimates 9,1. En el inventario forestal se identificaron 11 especies leñosas correspondientes a 9 familias botánicas; la estructura vertical y horizontal mediante la curva de acumulación de ACE y Chao1 marcó una representatividad del 92 % y 76 %, respectivamente, además su forma de J invertida con individuos mayormente en las primeras clases diamétricas y altimétricas, reflejan al bosque en proceso de recuperación. El Índice de Valor de Importancia ecológica indica que las especies más representativas son Ceiba trichistandra (A. Gray) Bakh., Cochlospermum vitifolium (Willd.) Spreng. y Neltuma juliflora (Sw.) Raf., mientras que el índice de Shannon-Weaver y Simpson estimaron una diversidad entre media y alta, el índice de Margalef estableció al bosque seco del sector “La Tomatera” con diversidad y riqueza especifica de especies forestales baja. A floresta seca desempenha um papel importante na conservação da maior biodiversidade do mundo e na compreensão de sua dinâmica e estrutura. No entanto, apresenta alta vulnerabilidade antrópica com ameaças ecológicas contemporâneas. É por isso que foi permitida a análise de sua incidência no nível da riqueza estrutural da floresta seca do setor “La Tomatera” do vale de Portoviejo. Vinte parcelas aleatórias de 20 x 25 m foram estabelecidas em um fragmento florestal de 100 hectares; foram registrados indivíduos ≥1 cm DAP 1,30 m e alturas ≤4,99 m, nos quais foram estabelecidas a identificação das espécies florestais, a determinação da riqueza, a estrutura horizontal e vertical, e a estimativa dos índices de valor de importância ecológica, Shannon-Weaver, Simpson e riqueza de Margalef, com estimadores não paramétricos em Estimates 9.1. No inventário florestal foram identificadas 11 espécies lenhosas correspondentes a 9 famílias botânicas; a estrutura vertical e horizontal através da curva de acumulação de ACE e Chao1 indicou uma representatividade de 92% e 76%, respectivamente. Além disso, sua forma de J invertido com indivíduos majoritariamente nas primeiras classes de diâmetro e altimetria reflete a floresta em processo de recuperação. O Índice de Valor de Importância ecológica indica que as espécies mais representativas são Ceiba trichistandra (A. Gray) Bakh, Cochlospermum vitifolium (Willd.) Spreng. e Neltuma juliflora (Sw.) Raf., enquanto o índice de Shannon-Weaver e Simpson estimaram uma diversidade entre média e alta, o índice de Margalef estabeleceu a floresta seca do setor “La Tomatera” com baixa diversidade e riqueza específica de espécies florestais. Facultad de Ciencias Agronómicas - UNR 2025-12-22 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares text/html application/pdf https://cienciasagronomicas.unr.edu.ar/index.php/agro/article/view/94 10.35305/agro46.e051 Ciencias Agronómicas; Núm. 46 (25): 2025; e051 2250-8872 1853-4333 spa https://cienciasagronomicas.unr.edu.ar/index.php/agro/article/view/94/118 https://cienciasagronomicas.unr.edu.ar/index.php/agro/article/view/94/119 Derechos de autor 2025 César Cabrera https://creativecommons.org/licenses/by-nc-sa/4.0 |