Abstract

DIAZ P, Wilmer A  and  ELCORO, Silvino. Pioneer plant species in disturbed mining areas in Bolívar State, Venezuela. Acta Bot. Venez. [online]. 2009, vol.32, n.2, pp.453-466. ISSN 0084-5906.

As part of the floristic inventory of some disturbed areas for gold and diamond’s alluvial mining in Bolívar State five localities were studied during the years 1992 and 1993. Mining activities cause holes, mood ponds and tails. In each locality the tails were divided in four areas according to the substrate and the plants were collected. The first herbs and sufrutescent plants showed at edges of the ponds and holes. Asa-Karón is the richest locality, followed by Supamo-Parapapoy, El Polaco, Bochinche and Guaniamo. cyperus odoratus, c. luzulae, Fuirena umbellata, Pityrogramma calomelanos, Trema micrantha and Phytolacca rivinoides are common species at the majority of the localities. The families with more species are Poaceae, Cyperaceae, Leguminosae, Melastomataceae, Asteraceae, Rubiaceae, Solanaceae, Onagraceae, Bignoniaceae and Clusiaceae.

Keywords : Bolívar State; floristic inventory; Guiana shield; mining; pioneer vegetation; succession; Venezuela.