Pinus elliottii natural regeneration in forest gaps: seven years population dynamics
We evaluated the dynamics of Pinus elliottii (Engelm.) natural regeneration in silvicultural gaps after strip clearcutting. Two orientations: EW and NS, and three size of gaps: ratio strip width/hight tree of 0,5; 0,8 y 1,1 were analyzed. Density, recruitment, mortality, diameter and height of plant...
| Autores principales: | , |
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| Formato: | Online |
| Lenguaje: | Spanish / Castilian |
| Publicado: |
Instituto de Ecología, A.C.
2016
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| Acceso en línea: | https://myb.ojs.inecol.mx/index.php/myb/article/view/1154 |
| _version_ | 1799769213355687936 |
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| author | Rebottaro, Silvia L. Cabrelli, Daniel A. |
| author_facet | Rebottaro, Silvia L. Cabrelli, Daniel A. |
| author_sort | Rebottaro, Silvia L. |
| collection | MYB |
| description | We evaluated the dynamics of Pinus elliottii (Engelm.) natural regeneration in silvicultural gaps after strip clearcutting. Two orientations: EW and NS, and three size of gaps: ratio strip width/hight tree of 0,5; 0,8 y 1,1 were analyzed. Density, recruitment, mortality, diameter and height of plants were monitored during seven years. The light environment was characterized using hemispherical photographs, and calculating relative radiation direct (Rd), indirect (Ri) and total (Rt). In general, plants density was enough to begin a productive cycle (2,7-8,1 plants m-2). The only critical condition was generated in strip 0,5 with NS orientation (radiatión < 55%), where density was 0,2-0,3 plants m-2. Whatever of the orientation, the strips 0,8 y 1,1 have good plants establishment, and relative higher than 65%. The recruitment was registered mainly during winter and spring. The mortality had more impact during spring-summer. More favorable condition for the growth was found in 1,1 strip with EW orientation, where Rt was 73%. Nine years after openning canopy, the analysis of tallest plants demonstrated differences between gaps. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-1154 |
| institution | Madera y Bosques |
| language | Spanish / Castilian |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-11542022-11-30T00:12:56Z Pinus elliottii natural regeneration in forest gaps: seven years population dynamics Regeneración natural de Pinus elliottii en claros silvícolas: dinámica poblacional durante siete años Rebottaro, Silvia L. Cabrelli, Daniel A. Gaps growth mortality Pinus elliottii solar radiation recruitment Claros crecimiento mortalidad Pinus elliottii radiación solar reclutamiento We evaluated the dynamics of Pinus elliottii (Engelm.) natural regeneration in silvicultural gaps after strip clearcutting. Two orientations: EW and NS, and three size of gaps: ratio strip width/hight tree of 0,5; 0,8 y 1,1 were analyzed. Density, recruitment, mortality, diameter and height of plants were monitored during seven years. The light environment was characterized using hemispherical photographs, and calculating relative radiation direct (Rd), indirect (Ri) and total (Rt). In general, plants density was enough to begin a productive cycle (2,7-8,1 plants m-2). The only critical condition was generated in strip 0,5 with NS orientation (radiatión < 55%), where density was 0,2-0,3 plants m-2. Whatever of the orientation, the strips 0,8 y 1,1 have good plants establishment, and relative higher than 65%. The recruitment was registered mainly during winter and spring. The mortality had more impact during spring-summer. More favorable condition for the growth was found in 1,1 strip with EW orientation, where Rt was 73%. Nine years after openning canopy, the analysis of tallest plants demonstrated differences between gaps. Se evaluó la dinámica de la regeneración natural de Pinus elliottii (Engelm.) en claros silvícolas generados mediante una cosecha en fajas. Se probó el efecto de dos orientaciones: EO y NS, y tres tamaños de apertura: razón ancho de faja/altura de árboles de 0,5; 0,8 y 1,1. Las poblaciones fueron evaluadas a partir del segundo año de apertura del dosel durante siete años. Se cuantificó la densidad, el reclutamiento, la mortalidad y el crecimiento en diámetro y altura. Para caracterizar el ambiente lumínico dentro de los claros se utilizó fotografía hemisférica del dosel, cuantificando la radiación relativa directa (Rd), indirecta (Ri) y total (Rt). En general, la densidad fue suficiente para inciar un ciclo productivo (2,7 a 8,1 brinzales m-2). La única condición limitante se encontró en el claro 0,5 con orientación NS (con radiación inferior al 55%), donde la densidad fue 0,2-0,3 plantas m-2. Los claros 0,8 y 1,1 presentaron buen establecimiento, independientemente de su orientación, y presentaron un ingreso de radiación relativa superior al 65%. El reclutamiento se concentró durante invierno-primavera, mientras que la mortalidad fue más frecuente en primavera-verano. La condición más favorable para el crecimiento se presentó en el claro 1,1 con orientación E-O, en el que se registró una Rt=73%. Nueve años después de la apertura de los claros, el análisis de las plantas más grandes de cada población permitió establecer claramente las diferencias entre los tratamientos de apertura. Instituto de Ecología, A.C. 2016-08-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares https://myb.ojs.inecol.mx/index.php/myb/article/view/1154 10.21829/myb.2011.1711154 Madera y Bosques; Vol. 17 No. 1 (2011): Primavera 2011; 49-70 Madera y Bosques; Vol. 17 Núm. 1 (2011): Primavera 2011; 49-70 2448-7597 1405-0471 es Derechos de autor 2016 Madera y Bosques |
| spellingShingle | Rebottaro, Silvia L. Cabrelli, Daniel A. Pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| title | Pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| title_full | Pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| title_fullStr | Pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| title_full_unstemmed | Pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| title_short | Pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| title_sort | pinus elliottii natural regeneration in forest gaps: seven years population dynamics |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/1154 |
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