Figure 1
Schematic map showing the study site location and sampled points in the State of Paraíba, Brazil. Points 1-6 refer to pitfall traps lines, while points 7-25 were sampled by time constrained search.
Figure 2
Phytophysiognomies of Caatinga seasonally dry tropical forests at RPPN Fazenda Almas, municipality of São José dos Cordeiros, state of Paraíba, northeastern Brazil. General aspect of the Caatinga vegetation (A. rainy season, B. dry season), dense arboreal Caatinga (C. rainy season, D. dry season), arborealshrub Caatinga (E. rainy season, F. dry season), and hyperxerophilic vegetation in rupicolous habitats on granitic-gneiss rock outcrops (G. rainy season, H. dry season). Photograph credits: Washington L.S Vieira.
Figure 3
Pitfall trap with drift fences installed in arboreal-shrub Caatinga at the RPPN Fazenda Almas, municipality of São José dos Cordeiros, state of Paraíba, northeastern Brazil. Photograph credits: Washington L.S Vieira.
Figure 4
Geographic location of RPPN Fazenda Almas (FAl), municipality of São José dos Cordeiros, state of Paraíba, northeastern Brazil, and other areas used in the analyses of faunistic similarity of snake assemblages in Caatinga seasonally dry tropical forests, northeastern Brazil. Brazilian State acronyms: BA, Bahia; CE, Ceará; MA, Maranhão; PB, Paraíba; PE, Pernambuco; PI, Piauí; RN, Rio Grande do Norte. Abbreviations of locality names: Car: Caraíbas-BA, Palm: Palmeiras-BA, RCa: Estação Ecológca Raso da Catarina-BA, Cap: Chapada do Apodi-RN, Vac: Fazenda Vale do Curu-CE, FAl: RPPN Fazenda Almas-PB, SJC: Estação Experimental de São João do Cariri-PB, ESE: Estação Ecológica Seridó-RN, Aiu: Estação Ecológica de Aiuaba-CE, FSa: Fazenda Saco-PE, FNN: Floresta Nacional de Negreiros-PE, Ima: Imaculada-PB, Pic: Picos-PI, Jua: Juazeiro-BA, Exu: Exu-PE, CAri: Chapada do Araripe-CE, PCa: Parque Nacional do Catimbau-PE, Xiq: Xique-Xique-BA, FVa: Fazenda Varjota -MA, FPa: Fazenda Paquetá-PI, Cpi: Castelo do Piauí-PI, PCo: Parque Nacional da Serra das Confusões-PI, PSC: Parque Nacional da Serra da Capivara-PI, Bar: Barras-PI, DSS: Depressão Sertaneja Setentrional, DSM: Depressão Sertaneja Meridional, DSF: Dunas do São Francisco, RC: Raso da Catarina, CCD: Complexo da Chapada Diamantina, CI-A: Complexo Ibiapaba-Araripe, SF-G: São Francisco-Gurguéia.
Figure 5
Snakes recorded in the RPPN Fazenda Almas, Paraíba State, municipality of São José dos Cordeiros, state of Paraíba, northeastern Brazil. Leptotyphlopidae: A - Epictia borapeliotes, Boidae: B - Boa constrictor, C - Corallus hortulanus, D - Epicrates assisi, Colubridae: E - Leptophis ahaetulla, F - Oxybelis aeneus, Dipsadidae: G - Apostolepis cearensis, H - Boiruna sertaneja, I - Erythrolamprus poecilogyrus, J - Erythrolamprus viridis, K - Leptodeira annulata, L - Oxyrhopus trigeminus, M - Philodryas nattereri, N - Philodryas olfersii, O - Pseudoboa nigra, P - Thamnodynastes hypoconia, Q - Thamnodynastes phoenix, R - Thamnodynastes sertanejo, S - Xenodon merremii, Elapidae: T - Micrurus aff. ibiboboca, Viperidae: U - Bothrops erythromelas, V - Crotalus durissus. Photograph credits: Washington L.S Vieira.
Figure 6
Accumulation curves for snakes sampled at the RPPN Fazenda Almas, municipality of São José dos Cordeiros, state of Paraíba, northeastern Brazil, constructed from 1000 randomizations without replacements, considering individual species abundance.. A - combination of all sampling methods, B - time constrained search, C - pitfall traps with drift fences, D - local collectors. Sobs = total number of species observed in a sample, CI = 95% confidence interval.
Figure 8
Non-metric multidimensional scaling (NMDS, stress 0.01) ordination of snakes assemblages in 24 localities in Caatinga ecoregions in northeastern Brazil. Complexo da Chapada Diamantina (yellow), Complexo Ibiapaba-Araripe (brown), Depressão Sertaneja Meridional (blue), Depressão Sertaneja Setentrional (red), Dunas do São Francisco (orange), Raso da Catarina (pink), São Francisco-Gurguéia (green). Abbreviations in
Figure 4.
