Resumo

MARTINEZ HERNANDEZ, Dinorah Dalila et al. Natural regeneration of the tamaulipan thornscrub in an Eucalyptus spp. plantation. Rev. mex. de cienc. forestales [online]. 2014, vol.5, n.21, pp.94-107. ISSN 2007-1132.

Forest plantations with exotic species are of great controversy worldwide. This research characterizes the natural regeneration of woody vegetation of Tamaulipan thornscrub (MET) in a plantation of Eucalyptus spp. Eleven sampling sites of 250 m² (10 x 25 m) were established in the plantation area and all wood species larger than one centimeter of basal diameter were registered and measured. Richness and diversity indices as well as values of relative abundance, dominance, frequency were estimated which were used to calculate the Importance Value Index. Results show that there is natural regeneration of native woody species under the plantation of Eucalyptus spp.; density, crown area, richness and diversity values were similar to other regenerated areas after agricultural activities, livestock and forestry (clear cutting). High density (4 301 ind ha^-1) and more individuals of lower diameter classes (<2 cm) were recorded.

Palavras-chave : Diversity; Eucalyptus; dominance; Importance Value Index; regeneration; richness.