Potential of restoration of coniferous forests from germplasm transfer zones in Mexico
DOI:
https://doi.org/10.29298/rmcf.v12i63.709Keywords:
Pine forest, clearcutting, dominance index, similitude index, forest plantations, rarefaction analysisAbstract
In order to increase the forest production and productivity in Durango State, clearcuttings with plantations of two pine species were made in natural stands of Pinus and Quercus species. The objective of the present study was to evaluate the effect of clearcuttings with plantations in the diversity of tree regeneration. This study was carried out in three commercial plantations in the Ejido La Ciudad Pueblo Nuevo, Durango. Twenty plots of 150 m2 were established at each plantation where the species name and diameter al the base of each individual sapling were recorded. In order to compare the diversity of the regeneration against natural stands that represent the original diversity that sustained the clearcutting areas, ten plots of 0.1 ha were located in the neighboring stands to register species name and diameter al breast height of each individual. Alfa and beta diversity as well as structure were evaluated using species richness, Shannon-Weiner, Jaccard, Sörensen and species importance value indexes. Rarefaction analysis was used to compare species richness and diversity. The rarefaction analysis indicated significant changes in species richness in one of the three plantations; diversity was significantly different in two of the three plantations in regard to the adjacent stands. Clearcutting tends to keep species richness and to modify species diversity.
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