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      Composition and natural history notes of the coastal snake assemblage from Northern Bahia, Brazil

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          Abstract

          Abstract

          Information about the snake diversity and their natural history from the Atlantic forest domain in Brazil refer mostly to inland forests than to coastal region. Within the state of Bahia, this knowledge is concentrated to the southeastern coastal stretch. Herein we report on the diversity of snakes from the restinga, ombrophilous forest and anthropogenic environment from the northern Atlantic coast of Bahia. We sampled nine sites for three years and visited four museum collections. Furthermore, we provide anecdotal natural history information, voucher analyses, literature complements, and a key to fascilitate species identification. We report a total of 774 snakes belonging to 50 species and 23 new distribution records for northeastern coast of Bahia, supplemented by new data on feeding and reproduction. The number of detected species is similar to numbers obtained in comparable studies from other Brazilian ecoregions. This study reports and focuses for the first time on all known species of snakes from the northeastern coast of Bahia.

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          Commonness, population depletion and conservation biology.

          Species conservation practice, as opposed to principle, generally emphasizes species at risk of imminent extinction. This results in priority lists principally of those with small populations and/or geographical ranges. However, recent work emphasizes the importance of common species to ecosystems. Even relatively small proportional declines in their abundance can result in large absolute losses of individuals and biomass, occurrences significantly disrupting ecosystem structure, function and services. Here, we argue that combined with evidence of dramatic declines in once common species, this suggests the need to pay more attention to such depletions. Complementing the focus on extinction risk, we highlight important implications for conservation, including the need to identify, monitor and alleviate significant depletion events.
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            Deep diversification and long-term persistence in the South American 'dry diagonal': integrating continent-wide phylogeography and distribution modeling of geckos.

            The relative influence of Neogene geomorphological events and Quaternary climatic changes as causal mechanisms on Neotropical diversification remains largely speculative, as most divergence timing inferences are based on a single locus and have limited taxonomic or geographic sampling. To investigate these influences, we use a multilocus (two mitochondrial and 11 nuclear genes) range-wide sampling of Phyllopezus pollicaris, a gecko complex widely distributed across the poorly studied South American 'dry diagonal' biomes. Our approach couples traditional and model-based phylogeography with geospatial methods, and demonstrates Miocene diversification and limited influence of Pleistocene climatic fluctuations on P. pollicaris. Phylogeographic structure and distribution models highlight that persistence across multiple isolated regions shaped the diversification of this species complex. Approximate Bayesian computation supports hypotheses of allopatric and ecological/sympatric speciation between lineages that largely coincide with genetic clusters associated with Chaco, Cerrado, and Caatinga, standing for complex diversification between the 'dry diagonal' biomes. We recover extremely high genetic diversity and suggest that eight well-supported clades may be valid species, with direct implications for taxonomy and conservation assessments. These patterns exemplify how low-vagility species complexes, characterized by strong genetic structure and pre-Pleistocene divergence histories, represent ideal radiations to investigate broad biogeographic histories of associated biomes. © 2012 The Author(s). Evolution© 2012 The Society for the Study of Evolution.
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              Répteis das caatingas

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                Author and article information

                Journal
                Zookeys
                Zookeys
                ZooKeys
                ZooKeys
                Pensoft Publishers
                1313-2989
                1313-2970
                2016
                15 August 2016
                : 611
                : 93-142
                Affiliations
                [1 ]Universidade Federal da Paraíba, Departamento de Sistemática e Ecologia, Programa de Pós-Graduação em Ciências Biológicas (Zoologia). Cidade Universitária. Rua José Dionísio da Silva, s/n, 58059-900, João Pessoa, PB, Brazil
                [2 ]Universidade Estadual de Santa Cruz, Programa de Pós-Graduação em Zoologia. Rodovia Jorge Amado, km 16. CEP 45662-900. Ilhéus, BA, Brazil
                [3 ]Universidade Federal de Santa Maria, Programa de Pós-Graduação em Biodiversidade Animal. Avenida Roraima, n° 1000, Cidade Universitária. CEP 67105-900. Camobi, Santa Maria, RS, Brazil
                [4 ]Zoological Research Museum Alexander Koenig, Department of Herpetology, Adenauerallee 160, 53113 Bonn, Germany
                [5 ]University of Kent at Canterbury; DICE - Durrell Institute of Conservation and Ecology; School of Anthropology and Conservation. Marlowe Building, Kent, CT2 7NZ, UK
                [6 ]Universidade Católica do Salvador, PROPP-PPGPA - Centro de Ecologia e Conservação Ambiental – ECOA. Avenida Prof. Pinto de Aguiar, 2589. CEP 41740-090. Pituaçu, Salvador, BA, Brazil
                Author notes
                Corresponding author: Ricardo Marques ( rcdmarquess@ 123456gmail.com )

                Academic editor: R. Jadin

                Article
                10.3897/zookeys.611.9529
                4992808
                53b6bc38-77c3-4969-82e1-da6e34fe5439
                Ricardo Marques, Konrad Mebert, Érica Fonseca, Dennis Rödder, Mirco Solé, Moacir Santos Tinôco

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 13 June 2016
                : 24 July 2016
                Categories
                Research Article

                Animal science & Zoology
                atlantic forest,coastal sand dunes,conservation,ombrophilous forest,restinga,snakes

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