Abstract

MARROQUIN-CASTILLO, Jonathan J. et al. Floristic composition and diversity of a post-mining area restored in the tamaulipan thornscrub. Polibotánica [online]. 2016, n.42, pp.1-17. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.42.1.

Ecological restoration in areas affected by opencast mining must have as a goal to reconstruct the natural ecosystems. This research aims to evaluate a tamaulipan thornscrub area, subjected to active restoration intervention after open cast mining to obtain limestone, feedstock in the construction process. The restoration technique consisted in depositing crushed rock and edaphic material in the area, and excluding it from of any productive activity. After seven years, the plant community was evaluated. Twelve sampling sites 100m2(10 x 10 m) was established in the area to evaluate the vegetation. In each site, the floristic composition was determined, as well as ecological indicators: abundance, density, frequency and importance value index, Margalef and Shannon-Wiener indexes. Were recorded a total of 22 species belonging to 19 genus and 13 families. The family with the largest presence was the Fabaceae, with five species. Brickellia veronicifolia showed greatest importance in the study area, with 59.19 % of the Importance Value Index. We was recorded a value of H’ of 1.49 and a DMg value of 3.12. With this research we conclude that restoration techniques consisted in depositing crushed rock and edaphic material in the area, and excluding it from of any productive activity could generates favorable conditions for the establishement of the tamaulipan thornscrub after the opencast mining.

Keywords : ecological restoration; reference ecosystems; passive restoration; richness species; diversity species.

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