Riqueza e endemismo de espécies de Baptistonia (Orchidaceae), no Brasil

Abstract

-(Species richness and endemism of species of Baptistonia (Orchidaceae, Oncidiinae) in Brazil). Species endemism and species richness are complementary concepts usually used in biodiversity evaluation. They can be useful tools for efficiently defining conservation areas. In the present study, they are applied to the Brazilian Atlantic Forest, based on an orchid group endemic to this biome, the genus Baptistonia. The study of the species richness shows one very rich area (The Serra do Castelo, ES) and six rich areas. Three of these areas show an endemism index greater than 1. Eight areas, most important for biodiversity conservation, are proposed. Hierarchical relationships of endemism between nine phytogeographical areas are evaluated based on parsimony analysis of endemicity. This analysis confirms: (a) that two important endemism centers can be recognized in the southern ecological part of the Atlantic Forest, and (b) together with the phylogenetic relationships within the genus Baptistonia, that the Serra do Castelo appears to be the diversification center of the genus.

Biogeography and conservation status assessment ofPseudolaelia(Orchidaceae)

“…Allied to this, the specific richness and occurrence in this region of endemic species of Prepusa and Senaea (Calió et al ., ), Alcantarea (Versieux, ), Baptistonia Barb.Rodr. (Chiron, ) and Bradea (Fiaschi & Pirani, ), among others, strengthen the importance of Serra dos Órgãos as a priority area for the conservation of biodiversity.…”

“…Silva & Oren, ; Posadas & Miranda‐Esquivel, ; Garcia‐Barros et al ., ; Manrique, Durán & Argáez, ; Rovito, Arroyo & Pliscoff, ; Sigrist & Carvalho, ), noteworthy here being the studies of Orchidaceae conducted in the Neotropical region by Trejo‐Torres & Ackerman (), Smidt et al . (), Verola () and Chiron (). Trejo‐Torres & Ackerman () preferred to use a more generic name, parsimony analysis of distribution (PAD), and Azeria et al .…”

Orchidaceae no município de Jacobina, estado da Bahia, Brasil

“…Baptistonia nitida é uma espécie epífita que até então era considerada restrita à Mata Atlântica em zonas litorâneas nos Estados do Rio de Janeiro, Espírito Santo e Bahia. As coletas dessa espécie são muito raras e na Bahia só há conhecimento de sua ocorrência próximo ao município de Canavieiras, às margens do rio Pardo, no litoral sul (Chiron 2007(Chiron , 2009. No município de Jacobina foi encontrada uma população com muitos indivíduos em Floresta Estacional Semidecidual, em área de encosta, na margem oriental da Serra do Tombador, que pode ser caracterizada como uma faixa de transição entre a caatinga e o campo rupestre.…”

Orchidaceae in an Atlantic Forest area: floristics and similarity to other Dense Ombrophilous Forest fragments

“…Other specific analyses of Orchidaceae richness and endemism have been presented by Chiron (2009) and Royer (2013). Regarding the spatial distribution of epiphytes to Orchidaceae, until now there have only been studies by Medeiros & Jardim (2011).…”