Abstract
A study was conducted on the forest structure of Pinus hartwegii Lindl., located at the Cofre de Perote National Park. The density, diameter, height and wooded coverage were evaluated along an altitudinal gradient from 3500 to 4000 meters in 20 plots of 100 m2. The structure of the population was found to be in the form of an “inverted J”. No statistically significant differences were found for any of the above-mentioned variables evaluated in the altitudinal range. A high density of suppressed individuals was found to occur at 50% of the sites sampled. Given the suppression characteristics of the trees, shelterwood is suggested for a better development of the woodland mass, as well as the introduction of mycorrhizal plants.
Highlights
Among the main types of vegetation to be found in Mexico are pine forests (Ellis & Martínez-Bello, 2010). 56 species have been reported in the country (Farjon, 2001), placing it as having the largest number of pine species in the world
In the State of Veracruz alone, pine forests occupy an area of 57502.18 hectares at heights of between 1500 and 3000 m above sea level
The objective of this study was to characterize the structure according to size of a Pinus hartwegii forest along an altitudinal gradient (3500 - 4000 m above sea level) in the National Park Cofre de Perote
Summary
Among the main types of vegetation to be found in Mexico are pine forests (Ellis & Martínez-Bello, 2010). 56 species have been reported in the country (Farjon, 2001), placing it as having the largest number of pine species in the world. In the State of Veracruz alone, pine forests occupy an area of 57502.18 hectares at heights of between 1500 and 3000 m above sea level. These forests are dominated by species of the Pinus gender, they may be associated with species of oak (Quercus spp.) (Ellis & Martínez-Bello, 2010). Owing to their demand for timber, and agricultural activities introduced, the surface of temperate forest in México has been a reduction of between 127,000 and 167,000 ha/year, equivalent to approximately 0.5% to. Murrieta-Hernández et al.0.8%/year, (Klooster & Masera, 2000), in addition to its being a source of raw material for industries employing terpentine, seeds, charcoal, pitch, pyroligneus acid, tar, methyl alcohol, among others (Martínez, 1992)
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