Distribution and conservation of natural populations of Pinus greggii
Pinus greggii Engelm. is endemic to eastern Mexico and of great ecological and economic importance. It occurs between 20º13' and 25º29' N latitude with a large gap of 360 km in the central portion of its range. The northern populations of the species are recognized as P. greggii var. gregg...
| Auteurs principaux: | , , |
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| Format: | Online |
| Langue: | spa |
| Publié: |
Instituto de Ecología, A.C.
2005
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| Accès en ligne: | https://abm.ojs.inecol.mx/index.php/abm/article/view/997 |
| _version_ | 1799771293292167168 |
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| author | Ramírez-Herrera, C. Vargas-Hernández, J. J. López-Upton, J. |
| author_facet | Ramírez-Herrera, C. Vargas-Hernández, J. J. López-Upton, J. |
| author_sort | Ramírez-Herrera, C. |
| collection | ABM |
| description | Pinus greggii Engelm. is endemic to eastern Mexico and of great ecological and economic importance. It occurs between 20º13' and 25º29' N latitude with a large gap of 360 km in the central portion of its range. The northern populations of the species are recognized as P. greggii var. greggii and the southern ones as P. greggii var. australis. The elevational range of the species is from 1,400 to 2,613 m above sea level. Populations in the southern region are located at lower elevations with higher mean temperatures and annual precipitation (±1,720 m, ±17.5°C and ±1,370 mm) than populations in the northern region (±2,450 m, ±13°C and ±640 mm). Twenty natural populations of the species were sampled, and huge differences were found among them in the area that they cover and the associated tree species. Southern populations are typically associated with species of temperate-subtropical tree communities, whereas in the northern region tree species from colder and semi-arid communities are more common. Juniperus flaccida and Quercus spp. are common to both regions. In general, populations at the extreme of the natural distribution were smaller and had a lower density of mature trees and seedlings. Most P. greggii populations are subjected to great human impact associated with wood extraction and farming activities, resulting in reduced regeneration. Options for in situ and ex situ conservation of this species are discussed. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-997 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2005 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-9972022-12-24T04:44:23Z Distribution and conservation of natural populations of Pinus greggii Distribución y conservación de las poblaciones naturales de Pinus greggii Ramírez-Herrera, C. Vargas-Hernández, J. J. López-Upton, J. Pinus greggii natural distribution demography in situ and ex situ conservation Pinus greggii distribución natural demografía conservación in situ y ex situ Pinus greggii Engelm. is endemic to eastern Mexico and of great ecological and economic importance. It occurs between 20º13' and 25º29' N latitude with a large gap of 360 km in the central portion of its range. The northern populations of the species are recognized as P. greggii var. greggii and the southern ones as P. greggii var. australis. The elevational range of the species is from 1,400 to 2,613 m above sea level. Populations in the southern region are located at lower elevations with higher mean temperatures and annual precipitation (±1,720 m, ±17.5°C and ±1,370 mm) than populations in the northern region (±2,450 m, ±13°C and ±640 mm). Twenty natural populations of the species were sampled, and huge differences were found among them in the area that they cover and the associated tree species. Southern populations are typically associated with species of temperate-subtropical tree communities, whereas in the northern region tree species from colder and semi-arid communities are more common. Juniperus flaccida and Quercus spp. are common to both regions. In general, populations at the extreme of the natural distribution were smaller and had a lower density of mature trees and seedlings. Most P. greggii populations are subjected to great human impact associated with wood extraction and farming activities, resulting in reduced regeneration. Options for in situ and ex situ conservation of this species are discussed. P. greggii Engelm. es endémico del este de México, con amplia importancia ecológica y económica. Su área de distribución natural se encuentra entre los 20º13' y los 25º29' de latitud N, con una discontinuidad de 360 km en la parte central. Las poblaciones del norte se conocen como P. greggii var. greggii y las del sur como P. greggii var. australis. El intervalo altitudinal de la especie es de 1,400 a 2,613 m s.n.m. Los rodales del sur se encuentran a menor elevación, con mayor temperatura media y precipitación anual (±1,720 m, ±17.5°C y ±1,370 mm) que las poblaciones de la región norte (±2,450 m, ±13°C y ±640 mm). Se muestrearon veinte poblaciones naturales de la especie, encontrándose considerables diferencias entre ellas en cuanto a la superficie que cubren y las especies arbóreas asociadas. En la porción sur se registraron plantas típicas de comunidades templado-cálidas, mientras que en el norte abundaron los árboles de climas frescos y semiáridos, aunque Juniperus flaccida y Quercus spp. son comunes en las dos regiones. En general las poblaciones en los extremos de la distribución natural presentan menor tamaño y menor densidad de arbolado maduro y regeneración. En la mayoría de las poblaciones de P. greggii el impacto humano es notable a causa del aprovechamientos de madera y actividades agropecuarias, dando como resultado una deficiente proporción de renuevos. Se discuten las posibilidades de conservación de la especie in situ y ex situ. Instituto de Ecología, A.C. 2005-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf https://abm.ojs.inecol.mx/index.php/abm/article/view/997 10.21829/abm72.2005.997 Acta Botanica Mexicana; No. 72 (2005); 1-16 Acta Botanica Mexicana; Núm. 72 (2005); 1-16 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/997/1158 Derechos de autor 2016 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Ramírez-Herrera, C. Vargas-Hernández, J. J. López-Upton, J. Distribution and conservation of natural populations of Pinus greggii |
| title | Distribution and conservation of natural populations of Pinus greggii |
| title_full | Distribution and conservation of natural populations of Pinus greggii |
| title_fullStr | Distribution and conservation of natural populations of Pinus greggii |
| title_full_unstemmed | Distribution and conservation of natural populations of Pinus greggii |
| title_short | Distribution and conservation of natural populations of Pinus greggii |
| title_sort | distribution and conservation of natural populations of pinus greggii |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/997 |
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