Ecological diversity of a snake assemblage from the Atlantic Forest at the south coast of Paraíba, northeast Brazil

Sampaio, Ivan L R; Santos, Claudileide P; França, Rafaela Cândido de; Pedrosa, Isabella M. M. C.; Solé, Mirco; França, Frederico Gustavo Rodrigues

doi:10.3897/zookeys.787.26946

Cited by 8 publications

(17 citation statements)

References 37 publications

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“…Time-constrained search and the use of local collectors are efficient methods for determining the richness and abundance of species in a given area, as opposed to pitfall traps with drift fences. Although snakes are often rather difficult to encounter (as compared to lizards and anurans) as many species demonstrate cryptic or secretive behaviors (Sazima & Haddad 1992, Sawaya et al 2008, time-constrained search and local collectors have proven to be adequate methods for sampling snakes in many other herpetofaunistic inventories undertaken in the Caatinga and other Brazilian biomes (e.g., Sazima & Haddad 1992, Sawaya et al 2008, Santana et al 2008, Freire et al 2009, Pontes et al 2008, Mesquita et al 2013b, Caldas et al 2016, Pereira-Filho et al 2017, Sampaio et al 2018. While visual search represents a low-cost technique, their strength will depend on the sampling effort and experience of the researchers involved (Mesquita et al 2013b).…”

Section: Discussionmentioning

confidence: 99%

“…Multivariate analyses were performed using R 3. Information concerning habits, activity periods and continental distributions of the species recorded at the RPPN Fazenda Almas (see Table 2) was obtained from the literature (see Duellman 1978, Dixon & Soini 1986, Zimmerman & Rodrigues 1990, Cadle & Greene 1993, Argôlo 2004, Martins & Oliviera 1998, Giraudo 2004, Marques & Sazima 2004, Zanella & Cechin 2006, Santana et al 2008, França et al 2008, Pereira-Filho et al 2017, Guedes et al 2018, Sampaio et al 2018.…”

Section: Data Analysesmentioning

confidence: 99%

“…Studies focusing on snake assemblages of northeastern Brazil have been quite limited and largely concentrated in coastal Atlantic Forest (e.g., Santana et al 2008, França et al 2012, Sampaio et al 2018. Although inventories of the reptiles (Squamata) in Brazilian semiarid regions have been undertaken in recent years (e.g., Garda et al 2013, Cavalcanti et al 2014, Dal Vechio et al 2016, Caldas et al 2016, information concerning Caatinga snakes are generally limited to preliminary taxonomic lists derived from short term inventories.…”

Section: Introductionmentioning

confidence: 99%

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Snakes in a seasonally dry tropical forest in northeastern Brazil

et al. 2020

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This study aimed to provide information on composition, abundance, and estimated snakes richness in an area of arboreal Caatinga (seasonally dry tropical forest) and analyze patterns of faunistic similarity between assemblages of snakes in the semiarid region of northeastern Brazil. The snakes found within the Fazenda Almas Natural Private Reserve (RPPN Fazenda Almas) were sampled during a 10-year period, with monthly monitoring, employing time constrained search, pitfall traps with drift fences, and donations from local collectors. Twenty-two snake species were recorded, with a predominance of terrestrial species with diurnal-nocturnal activity patterns. The species accumulation curves reached its asymptote, indicating that all possible species in the study area had been recorded. Our results indicated that the snake fauna in the study area is similar to other snake assemblages in localities with Caatinga vegetation in the Sertaneja Depression (“Depressão Sertaneja”) drylands, and that those assemblages constitute faunistic units typical of the interior of northeastern Brazil.

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Section: Discussionmentioning

confidence: 99%

Section: Data Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Snakes in a seasonally dry tropical forest in northeastern Brazil

et al. 2020

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“…In the PEC it occurs in all states (Fig. 8H), being found in Forest, Brejos Nordestinos, Tabuleiros, and restingas (Pereira Filho and Montingelli 2011, Sampaio et al 2018. Tantilla melanocephala feeds on arthropods.…”

Section: Family Colubridae Oppel 1811mentioning

confidence: 98%

“…In the PEC it occurs in all states (Fig. 10C), being found in Forest, Brejos Nordestinos, Tabuleiros, and urban areas (Pereira Filho et al 2017, Sampaio et al 2018. Oxyrhopus petolarius feeds on lizards, mammals, birds and amphibians (Alencar et al 2013).…”

Section: Family Colubridae Oppel 1811mentioning

confidence: 99%

Snakes of the Pernambuco Endemism Center, Brazil: diversity, natural history and conservation

França¹,

Morais²,

França³

et al. 2020

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The Atlantic Forest is one of the largest and richest tropical rainforests on the planet, being one of the 25 world priorities for conservation. The Atlantic Forest portion located north of the São Francisco River corresponds to the Pernambuco Endemism Center (PEC). We describe the snake composition of the PEC, providing information about the diversity, natural history and geographical distribution of the species, based on records from five scientific collections and additional information from the literature. A total of 78 species of snakes distributed in eight families was registered in the Pernambuco Endemism Center. The Caatinga is the Brazilian biome that most shares species with the PEC, followed by Cerrado. On the other hand, seven species are considered endemic of this region. Most of the snake species in the PEC have been registered in forest (94.8%), followed by “Brejos Nordestinos” (46.1%), Tabuleiros (43.5%), Restingas (14.1%) and Mangroves (5.1%). The PEC snake fauna includes mainly terrestrial species (60.2%) and cryptozoic and/or fossorial species (21.7%), but also presents a high richness of semi-arboreal and arboreal species (29.5%). Vertebrates are the main food item consumed by the species (78% of species), among the main prey are mammals, lizards, and amphibians. Most species show a strictly nocturnal activity period (50%), followed by strictly diurnal (38%). The PEC is the most degraded and least known region of the Atlantic Forest, yet it has revealed a high richness of snake species, including seven endemic species. It is emphasized that regional conservation efforts need to be intensified, because few forests in the region are formally protected, and the majority consist of small and poorly protected fragments, which means that many species in the region may be in risk of extinction.

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Comparative survey techniques for a cryptic Australian snake (

Shelton

Goldingay

2021

Aust. J. Zool.

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Ecologists endeavour to develop survey techniques that are cost-effective for the species they target and robust enough for statistical analysis. Using time as a measure of effort, we compared visual encounter surveys with artificial cover objects (strapped to trees), targeting an arboreal elapid, the pale-headed snake (Hoplocephalus bitorquatus) and its potential prey (geckos). Within a red gum forest vegetation community with relatively high snake density, capture rates were 0.6 ± 0.1 (s.e.) snakes/person-hour using visual encounter surveys, compared with only 0.1 ± 0.1 snakes/person-hour using cover objects. The probability of detection of pale-headed snakes was estimated from occupancy modelling at 0.70 ± 0.06 in visual encounter surveys and 0.19 ± 0.09 in cover object surveys. Gecko capture rates (among all vegetation communities) were significantly greater (P < 0.001) using cover objects. The probability of detection of geckos was estimated from occupancy modelling at 0.77 ± 0.05 in visual encounter surveys and 0.97 ± 0.02 in cover object surveys. Geckos favoured (P < 0.001) cover objects facing south during all seasons except winter. Artificial cover objects may provide some value in detecting pale-headed snakes in vegetation communities where habitat resources are limited; however, where resources are plentiful, visual encounter surveys are likely to remain the most cost-effective survey option.

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Ecological diversity of a snake assemblage from the Atlantic Forest at the south coast of Paraíba, northeast Brazil

Cited by 8 publications

References 37 publications

Snakes in a seasonally dry tropical forest in northeastern Brazil

Snakes in a seasonally dry tropical forest in northeastern Brazil

Snakes of the Pernambuco Endemism Center, Brazil: diversity, natural history and conservation

Comparative survey techniques for a cryptic Australian snake (

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