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Indirect effects of habitat loss via habitat fragmentation: A cross-taxa analysis of forest-dependent species

2019; Elsevier BV; Volume: 241; Linguagem: Inglês

10.1016/j.biocon.2019.108368

1873-2917

Thomas Püttker, Renato Crouzeilles, Mauricio Almeida‐Gomes, Marina Schmoeller, Daniel Maurenza, Helena Alves-Pinto, Renata Pardini, Marcus Vinícius Vieira, Cristina Banks‐Leite, Carlos Roberto Fonseca, Jean Paul Metzger, Gustavo Mattos Accacio, Eduardo Roberto Alexandrino, Camila dos Santos de Barros, Juliano André Bogoni, Danilo Bôscolo, Pedro H. S. Brancalion, Adriana A. Bueno, Elaine C. B. Cambuí, Gustavo Rodrigues Canale, Rui Cerqueira, Ricardo G. César, Gabriel Dalla Colletta, Ana Cláudia Delciellos, Marianna Dixo, Candelaria Estavillo, Carolina Franco Esteves, Fábio de Carvalho Falcão, Fabiano Turini Farah, Deborah Faria, Kátia Maria Paschoaletto Micchi de Barros Ferraz, Sílvio Frosini de Barros Ferraz, Patrícia Alves Ferreira, Maurício Eduardo Graipel, Carlos Eduardo Viveiros Grelle, Malva Isabel Medina Hernández, Natália Macedo Ivanauskas, Rudi Ricardo Laps, Inara R. Leal, Marília Mascarenhas Lima, Marília Bruzzi Lion, Marcelo Magioli, Luiz Fernando Silva Magnago, Julia R.A.S. Mangueira, Euvaldo Marciano‐Jr, Eduardo Mariano‐Neto, Márcia C. M. Marques, Sebastião Venâncio Martins, Marlla A. Matos, Fábio Antônio Ribeiro Matos, Jeanette I. Miachir, José M. Morante-Filho, Natalie Olifiers, Luiz Gustavo Rodrigues Oliveira‐Santos, Mateus Luís Barradas Paciência, Adriano Pereira Paglia, Marcelo Passamani, Carlos A. Peres, Clarissa Machado Pinto-Leite, Tiago Jordão Porto, Luciano Carramaschi de Alagão Querido, Luciana Carvalho dos Reis, Andréia Alves Rezende, Dary Moreira Gonçalves Rigueira, Pedro Luís Bernardo da Rocha, Larissa Rocha‐Santos, Ricardo Ribeiro Rodrigues, Rafael A. S. Santos, Juliana Silveira dos Santos, Maxwell Souza Silveira, Marcelo Simonelli, Marcelo Tabarelli, Rodrigo Nogueira Vasconcelos, Blandina Felipe Viana, Emerson Monteiro Vieira, Jayme Augusto Prevedello,

Wildlife Ecology and Conservation

Recent studies suggest that habitat amount is the main determinant of species richness, whereas habitat fragmentation has weak and mostly positive effects. Here, we challenge these ideas using a multi-taxa database including 2230 estimates of forest-dependent species richness from 1097 sampling sites across the Brazilian Atlantic Forest biodiversity hotspot. We used a structural equation modeling approach, accounting not only for direct effects of habitat loss, but also for its indirect effects (via habitat fragmentation), on the richness of forest-dependent species. We reveal that in addition to the effects of habitat loss, habitat fragmentation has negative impacts on animal species richness at intermediate (30–60%) levels of habitat amount, and on richness of plants at high (>60%) levels of habitat amount, both of which are mediated by edge effects. Based on these results, we argue that dismissing habitat fragmentation as a powerful force driving species extinction in tropical forest landscapes is premature and unsafe.