Understory light availability in stands of Abies religiosa
The availability of light is one of the main factors that influences the establishment and development of plant species in the forest understory. In order to characterize the light environment and canopy structure, and their relationships with understory plant diversity, sampling sites were establis...
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| Formaat: | Online |
| Taal: | spa |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
2018
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| Online toegang: | https://myb.ojs.inecol.mx/index.php/myb/article/view/e2431711 |
| _version_ | 1799769354102898688 |
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| author | Plateros-Gastélum, Pedro Antonio Reyes-Hernández, Valentín José Velázquez-Martínez, Alejandro Hernández de la Rosa, Patricia Campos-Ángeles, Gisela Virginia |
| author_facet | Plateros-Gastélum, Pedro Antonio Reyes-Hernández, Valentín José Velázquez-Martínez, Alejandro Hernández de la Rosa, Patricia Campos-Ángeles, Gisela Virginia |
| author_sort | Plateros-Gastélum, Pedro Antonio |
| collection | MYB |
| description | The availability of light is one of the main factors that influences the establishment and development of plant species in the forest understory. In order to characterize the light environment and canopy structure, and their relationships with understory plant diversity, sampling sites were established in pure Abies religiosa (Kunth) Schltdl. et Cham. stands in Aquixtla, Puebla. In these sites, information useful to evaluate stands characteristics, namely basal area, tree density, and quadratic mean diameter was collected. Also, canopy structural characteristics, in particular, leaf area index, canopy opening fraction, and light transmission index, were estimated from hemispherical photographs taken onsite and analysed with the software GLI®. Understory light environment indicators were also estimated, namely direct and diffuse radiation, sunflecks distribution and frequency, sunpatches, sungaps, and clearings, as well as cumulative average daily sunflecks and average sunflecks duration. Relationships among the variables estimated were determined with Pearson’s correlation coefficient and with simple linear regression. Results showed a significant and strong relationship between canopy structure and solar radiation parameters (p < 0.001), while stand structure and light parameters (p < 0.05) showed a low correlation (r ≈ 0.50). Canopy opening fraction was the most powerful explanatory variable for leaf area index, direct and diffuse radiation available in the understorey, as well as for canopy light transmission rate. The variability of the understory light regime for these stands was better explained by canopy structure parameters than by stand structural characteristics. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-1711 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2018 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-17112022-11-29T22:53:41Z Understory light availability in stands of Abies religiosa Disponibilidad de luz bajo dosel en rodales de Abies religiosa Plateros-Gastélum, Pedro Antonio Reyes-Hernández, Valentín José Velázquez-Martínez, Alejandro Hernández de la Rosa, Patricia Campos-Ángeles, Gisela Virginia canopy cover hemispherical photography sunflecks leaf area index oyamel fir understorey plants cobertura del dosel fotografías hemisféricas haces de luz índice de área foliar oyamel sotobosque The availability of light is one of the main factors that influences the establishment and development of plant species in the forest understory. In order to characterize the light environment and canopy structure, and their relationships with understory plant diversity, sampling sites were established in pure Abies religiosa (Kunth) Schltdl. et Cham. stands in Aquixtla, Puebla. In these sites, information useful to evaluate stands characteristics, namely basal area, tree density, and quadratic mean diameter was collected. Also, canopy structural characteristics, in particular, leaf area index, canopy opening fraction, and light transmission index, were estimated from hemispherical photographs taken onsite and analysed with the software GLI®. Understory light environment indicators were also estimated, namely direct and diffuse radiation, sunflecks distribution and frequency, sunpatches, sungaps, and clearings, as well as cumulative average daily sunflecks and average sunflecks duration. Relationships among the variables estimated were determined with Pearson’s correlation coefficient and with simple linear regression. Results showed a significant and strong relationship between canopy structure and solar radiation parameters (p < 0.001), while stand structure and light parameters (p < 0.05) showed a low correlation (r ≈ 0.50). Canopy opening fraction was the most powerful explanatory variable for leaf area index, direct and diffuse radiation available in the understorey, as well as for canopy light transmission rate. The variability of the understory light regime for these stands was better explained by canopy structure parameters than by stand structural characteristics. La disponibilidad de luz en los bosques es uno de los principales factores que influyen en el establecimiento y desarrollo de especies vegetales bajo el dosel forestal. A fin de caracterizar el ambiente lumínico bajo el dosel de Abies religiosa (Kunth) Schltdl. et Cham., así como la estructura del dosel y su relación con la diversidad vegetal a nivel del sotobosque, se establecieron sitios de muestreo en los cuales se colectó información para evaluar atributos del rodal como área basal, densidad y diámetro cuadrático. Además, se determinaron, mediante fotografías digitales hemisféricas, los parámetros estructurales del dosel, índice de área foliar, fracción de apertura del dosel e índice de transmisión de luz; los parámetros lumínicos bajo el dosel: radiación directa y difusa, frecuencia, distribución de haces de luz, parches de luz, claros de luz y claros; duración media acumulada diaria de haces de luz y duración promedio de un haz de luz. Se determinó la relación existente entre las variables de estudio mediante regresión lineal simple y de asociación de estas a partir del coeficiente de correlación de Pearson. Los resultaron mostraron relaciones significativas entre parámetros estructurales del dosel (p < 0.001) y parámetros lumínicos; mientras que las relaciones de parámetros de estructura del rodal y parámetros lumínicos (p < 0.05) tuvieron una menor correlación (r ≈ 0.50). La fracción de apertura del dosel fue el mejor predictor para el índice de área foliar, radiación directa y difusa disponible en el sotobosque, así como para el índice de transmisión de luz del dosel. La variabilidad del régimen de luz bajo dosel fue mejor explicada por los parámetros de la estructura que por las características estructurales del rodal. Instituto de Ecología, A.C. 2018-12-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf application/xml https://myb.ojs.inecol.mx/index.php/myb/article/view/e2431711 10.21829/myb.2018.2431711 Madera y Bosques; Vol. 24 No. 3 (2018): Otoño 2018 Madera y Bosques; Vol. 24 Núm. 3 (2018): Otoño 2018 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/e2431711/1834 https://myb.ojs.inecol.mx/index.php/myb/article/view/e2431711/1902 Derechos de autor 2018 Madera y Bosques |
| spellingShingle | Plateros-Gastélum, Pedro Antonio Reyes-Hernández, Valentín José Velázquez-Martínez, Alejandro Hernández de la Rosa, Patricia Campos-Ángeles, Gisela Virginia Understory light availability in stands of Abies religiosa |
| title | Understory light availability in stands of Abies religiosa |
| title_full | Understory light availability in stands of Abies religiosa |
| title_fullStr | Understory light availability in stands of Abies religiosa |
| title_full_unstemmed | Understory light availability in stands of Abies religiosa |
| title_short | Understory light availability in stands of Abies religiosa |
| title_sort | understory light availability in stands of abies religiosa |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/e2431711 |
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