Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico
The Sierra Fría in Aguascalientes is part of the Sierra Madre Occidental Physiographic Province. The predominant vegetation types in the area are pine (P i n u s spp.), oak (Q u e r c u s s p p . ) , juniper (J u n i p e r u s spp.) and mixed forests that have been modified due to wood extraction, f...
| Main Authors: | , , |
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| Formato: | Online |
| Idioma: | spa |
| Publicado: |
Instituto de Ecología, A.C.
2016
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| Acceso en liña: | https://myb.ojs.inecol.mx/index.php/myb/article/view/1216 |
| _version_ | 1799769246844059648 |
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| author | Chapa Bezanilla, Daniel Sosa Ramírez, Joaquín de Alba Ávila, Abraham |
| author_facet | Chapa Bezanilla, Daniel Sosa Ramírez, Joaquín de Alba Ávila, Abraham |
| author_sort | Chapa Bezanilla, Daniel |
| collection | MYB |
| description | The Sierra Fría in Aguascalientes is part of the Sierra Madre Occidental Physiographic Province. The predominant vegetation types in the area are pine (P i n u s spp.), oak (Q u e r c u s s p p . ) , juniper (J u n i p e r u s spp.) and mixed forests that have been modified due to wood extraction, fire and heavy grazing. In order to estimate the degree of deterioration or recuperation of these forests a multitemporal study was done from the comparative analyses of airphotos of the area for 1956, 1970 and 1993, that were digitized and georeferenced. Changes in the areas occupied by different types of forest were compared the degree of site fragmentation of each vegetation type, using functions from the geographical information systems. Photographic mosaics for each date were generated, processed and analyzed. The area occupied by each of the forest types in the three dates was compared and an increase was found for Juniper forest, for pine forests and for oak forests from 1956 to 1993. At the same time, oaks increased in number of sites, as will as pine and juniper. Due to these results it was considered that the changes in area and fragmentation degree were not significant which indicates that the rate of use of these resources is about equal to the rate of recuperation. Nonetheless, notable changes were observed in the cover degree or micro fragmentation within sites of each vegetation type, with a tendency to increase. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-1216 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-12162022-11-30T00:36:05Z Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico Estudio multitemporal de fragmentación de los bosques en la Sierra Fría, Aguascalientes, México Chapa Bezanilla, Daniel Sosa Ramírez, Joaquín de Alba Ávila, Abraham Air photo Juniperus Pinus Quercus Geographical Information Systems Fotografía aérea Juniperus Pinus Quercus Sistema de Información Geográfica The Sierra Fría in Aguascalientes is part of the Sierra Madre Occidental Physiographic Province. The predominant vegetation types in the area are pine (P i n u s spp.), oak (Q u e r c u s s p p . ) , juniper (J u n i p e r u s spp.) and mixed forests that have been modified due to wood extraction, fire and heavy grazing. In order to estimate the degree of deterioration or recuperation of these forests a multitemporal study was done from the comparative analyses of airphotos of the area for 1956, 1970 and 1993, that were digitized and georeferenced. Changes in the areas occupied by different types of forest were compared the degree of site fragmentation of each vegetation type, using functions from the geographical information systems. Photographic mosaics for each date were generated, processed and analyzed. The area occupied by each of the forest types in the three dates was compared and an increase was found for Juniper forest, for pine forests and for oak forests from 1956 to 1993. At the same time, oaks increased in number of sites, as will as pine and juniper. Due to these results it was considered that the changes in area and fragmentation degree were not significant which indicates that the rate of use of these resources is about equal to the rate of recuperation. Nonetheless, notable changes were observed in the cover degree or micro fragmentation within sites of each vegetation type, with a tendency to increase. La Sierra Fría, en Aguascalientes, forma parte de la provincia fisiográfica Sierra Madre Occidental. Los tipos de vegetación predominantes en la zona son bosques de pino (Pinus spp.), encino (Quercus spp.), táscate (Juniperus spp.), y mixtos, que se han modificado debido a la extracción de leña, incendios forestales y pastoreo intensivo. Para estimar el grado de deterioro o recuperación de estos bosques se realizó un estudio multitemporal a partir del análisis comparativo de fotografías aéreas de la zona para 1956, 1970 y 1993, que fueron digitalizadas y georreferenciadas. Se compararon los cambios en las áreas ocupadas por los distintos tipos de bosque y se determinó, el grado de fragmentación de los rodales de cada tipo de vegetación, mediante funciones de sistemas de información geográfica. Se generaron, procesaron y analizaron mosaicos fotográficos para cada fecha. Se comparó el área ocupada por cada tipo de bosque en las tres fechas y se encontró aumento para bosque de táscate, para bosque de pino y para bosque de encino, entre 1956 y 1993. Asimismo, los encinares aumentaron su número de rodales lo mismo que los pinares y el táscate durante el mismo periodo. Debido a estos resultados se consideró que los cambios en superficie y grado de fragmentación fueron poco significativos, lo que indica que la tasa de aprovechamiento de estos recursos es equiparable a la de recuperación. Sin embargo, se observaron cambios notables en el grado de cobertura o microfragmentación al interior de los rodales de cada tipo de vegetación por separado, con una franca tendencia hacia el aumento. Instituto de Ecología, A.C. 2016-08-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf https://myb.ojs.inecol.mx/index.php/myb/article/view/1216 10.21829/myb.2008.1411216 Madera y Bosques; Vol. 14 No. 1 (2008): Primavera 2008; 37-51 Madera y Bosques; Vol. 14 Núm. 1 (2008): Primavera 2008; 37-51 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/1216/1390 Derechos de autor 2016 Madera y Bosques |
| spellingShingle | Chapa Bezanilla, Daniel Sosa Ramírez, Joaquín de Alba Ávila, Abraham Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico |
| title | Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico |
| title_full | Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico |
| title_fullStr | Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico |
| title_full_unstemmed | Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico |
| title_short | Multitemporal study on forest fragmentation in sierra Fria, Aguascalientes, Mexico |
| title_sort | multitemporal study on forest fragmentation in sierra fria, aguascalientes, mexico |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/1216 |
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