Spider species richness and sampling effort at Cracraft´S Belém Area of Endemism
AUTOR(ES)
RODRIGUES, BRUNO V.B., AGUIAR-NETO, MANOEL B., OLIVEIRA, UBIRAJARA DE, SANTOS, ADALBERTO J., BRESCOVIT, ANTONIO D., MARTÍNS, MARLÚCIA B., BONALDO, ALEXANDRE B.
FONTE
An. Acad. Bras. Ciênc.
DATA DE PUBLICAÇÃO
17/08/2017
RESUMO
ABSTRACT A list of spider species is presented for the Belém Area of Endemism, the most threatened region in the Amazon Basin, comprising portions of eastern State of Pará and western State of Maranhão, Brazil. The data are based both on records from the taxonomic and biodiversity survey literature and on scientific collection databases. A total of 319 identified species were recorded, with 318 occurring in Pará and only 22 in Maranhão. About 80% of species are recorded at the vicinities of the city of Belém, indicating that sampling effort have been strongly biased. To identify potentially high-diversity areas, discounting the effect of variations in sampling effort, the residues of a linear regression between the number of records and number of species mapped in each 0.25°grid cells were analyzed. One grid, representing the Alto Turiaçu Indigenous land, had the highest deviation from the expected from the linear regression, indicating high expected species richness. Several other grid cells showed intermediate values of the regression residuals, indicating species richness moderately above to the expected from the model.
Documentos Relacionados
- Palm species richness, latitudinal gradients, sampling effort, and deforestation in the Amazon region
- Sampling effort and fish species richness in small terra firme forest streams of central Amazonia, Brazil
- Asteraceae in the northern Espinhaço Range, Brazil: richness, endemism and conservation
- Ecological niche models and patterns of richness and endemism of the southern Andean genus Eurymetopum (Coleoptera, Cleridae)
- Richness, composition and trophic groups of an avian community in the Pernambuco Endemism Centre, Alagoas, Brazil