Bromeliaceae diversity and conservation in Minas Gerais state, Brazil

Field work and data from herbaria collections ( 2686 records) representing 283 taxa ( 265 species and 18 infraspecific taxa) of Bromeliaceae occurring at Minas Gerais state, southeastern Brazil, were analyzed in order to obtain distribution and diversity information, and to determine IUCN ( The World Conservation Union) conservation status for each taxon. A map containing 1 degrees x 1 degrees grid cells was used to identify priority areas for new research collections, areas of high species diversity, and Bromeliaceae conservation status. A clear decrease in Bromeliaceae diversity is observed between the eastern and the western portions of Minas Gerais, and low floristic similarities were found between neighboring grid cells. The rocky mountains of Cadeia do Espinhaco are considered the most important area for Bromeliaceae endemics. From the 283 taxa of Bromeliaceae that occur at Minas Gerais, 118 ( 42%) are considered threatened, and 124 taxa ( 44% of the total) do not occur inside any protected area. The region of the Quadrilatero Ferrifero in the southern portion of the Cadeia do Espinhaco is the most threatened, and urgent strategies for conservation of this rich Bromeliaceae flora are needed. Northeastern Minas Gerais, particularly the rocky outcrops or inselbergs located in the Jequitinhonha and Mucuri rivers drainage basins need additional collection eVorts and conservation actions focused on these saxicolous taxa.