Navegando por Autor "Silva, Tiago Castro"

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Artigo
Before it’s too late: priority areas for conservation of cryptic and threatened species of troglobitic arthropods in the Brazilian semiarid
(2024-04-18) Bento, Diego de Medeiros; Ferreira, Rodrigo Lopes; Vasconcelos, Santelmo; Lima, Jamily Lorena Ramos de; Oliveira, Guilherme; Silva, Tiago Castro; Lima, Sergio Maia Queiroz
One of the most important steps in identifying priority areas for conservation is the assessment of species richness and their extinction risks. While most species remain undescribed, the identification of cryptic lineages is frequent in phylogenetic and phylogeographic studies. This is particularly common in troglobites, exclusively subterranean organisms. The Jandaíra Formation, in the Brazilian semiarid, combines the occurrence of extensive karstic areas with hundreds of caves and subterranean aquifers in a region with intense paleoclimatic changes. This region is recognized for the richness of troglobitic species, some of which are widely distributed in heterogeneous areas. This suggests cryptic lineages that can be differentially exposed to anthropogenic threats, with distinct extinction risks regarding the nominal taxa of which they putatively belong. To test it, a large sampling was conducted and, by means of lineage delimitation analyses, the genetic structure of four troglobitic taxa, three aquatic and one terrestrial, was evaluated. In addition, the extinction risk of these lineages was assessed and priority areas for conservation were identified. The results indicated that while Cirolanidae sp. 1 (Isopoda) is a single species widely distributed, Cirolanidae sp. 2, Potiberaba porakuara (Amphipoda) and Kinnapotiguara troglobia (Hemiptera) present an extensive diversity of cryptic and endemic lineages, most of which are likely new threatened species. Furthermore, two priority areas for conservation of these lineages were identified. Thus, comparative phylogeography may represent a first step in the conservation of subterranean taxa, indicating areas that should be prioritized in a context of increasing threats and dwindling conservation resources.
Livro
Livro Vermelho da Fauna Brasileira Ameaçada de Extinção.
(ICMBio, 2018) Subirá, Rosana Junqueira; Galvão, Amanda; Carvalho, Carlos Eduardo Guidorizzi de; Soares, Ana Hermínia Simões de Bello; Martins, Drielle dos Santos; Oliveto, Fernanda Aléssio; Leonhardt, Gabriela; Cortês, Lara Gomes; Pimenta, Mayra; Arimoro, Omolabake Alhambra Silva; Silva, Tamilis Rocha; Silva, Tiago Castro; Silva, Verônica de Novais e
Esta edição do Livro Vermelho da Fauna Brasileira Ameaçada de Extinção traz o resultado do processo de avaliação das espécies coordenado pelo Instituto Chico Mendes, oficializado pelo Ministério do Meio Ambiente por meio das Portarias nº 444 e 445 de 2014. No Volume I desta obra é possível consultar informações acerca do processo. Para identificar as espécies ameaçadas, adotou-se a metodologia da UICN (União Internacional para a Conservação da Natureza)22. Por se tratar de uma avaliação nacional, para as espécies não endêmicas do país foi utilizada a adaptação regional prevista no método23. Um resumo sobre a metodologia e alguns conceitos fundamentais encontram-se no texto introdutório do Volume I.
Artigo
On the future of the could protected areas in Brazil’s Semi-Arid conserve endangered birds facing climatic and land cover changes?
(Biodiversidade Brasileira, 2020) Silva, Tiago Castro; Côrtes, Lara Gomes; Siqueira, Marinez Ferreira de
Protected areas act as pillars on which conservation strategies are built. Besides human activities, global climate changes are an additional concern to species’ conservation. In northeastern Brazil, climate change should lead to a replacement of the current native vegetation by semi-desert vegetation. This study evaluates whether the protected areas of the Caatinga can contribute to the maintenance of suitable climatic conditions for endangered birds over time in the face of global climate changes and land cover change. We used ecological niche models as input layers in a spatial prioritization program, in which stability indices were used to weight the targets. Results predicted that most taxa (18) will have their suitability lowered in the future, and all taxa (23) will have their ecological niche geographically displaced. However, our results showed that the Caatinga’s protected areas system integrated with a set of priority areas can maintain suitable climatic conditions for endangered birds in the face of climate change and land cover change. On average, Caatinga’s protected areas system could protect climatic stability areas at least 1.7 times greater than the scenarios without it. This reinforces the importance of protected areas as a biodiversity conservation strategy.
Outros
Relatório Anual - CECAV 2021
(2022-03) Oliveira, Alessandro Fabiano de; Lessa, Carla Michelle; Luz, Claudia Simone da; Ferreira, Cristiano Fernandes; Mendonça, Daniel Reis Maiolino de; Santos, Darcy José dos; Bento, Diego de Medeiros; Martins, Drielle dos Santos; Osório, Frederico Moreira; Cruz, Jocy Brandão; Reino, José Carlos Ribeiro; Freitas, José Iatagan Mendes de; Costa, Júlio César Rocha; Costa Neto, Júlio Ferreira da; Andrade, Maurício Carlos Martins de; Gomes, Mauro; Nunes, Thais Xavier; Silva, Tiago Castro