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<p>Biological invasions are among the leading drivers of global biodiversity loss, yet in Brazil, the diversity and impacts of non-native invertebrates remain poorly documented, mostly focusing on fishes, arthropods, and mammals. Here, we present the first comprehensive inventory of non-native molluscs in Brazil, revealing a more than 200% increase—from 26 to 82 species—over the past 15&#xa0;years. This updated list includes representatives of Gastropoda and Bivalvia, and, for the first time, Polyplacophora and Cephalopoda. Each species was categorized according to introduction status: contained, detected, established, invasive, or data deficient; cryptogenic species were listed separately. In total, 82 non-native and 13 cryptogenic species were listed. Among the former, 12 species are contained, 18 detected, 20 established, 20 invasive, and 12 data deficient. These species are divided unevenly across environments: marine/estuarine (32 non-native, 4 cryptogenic), freshwater (17 non-native), and terrestrial (33 non-native, 9 cryptogenic). Our findings underscore the accelerating rate of non-native mollusc introductions, persistent taxonomic and ecological knowledge gaps, and the urgent need to strengthen biosecurity measures, early detection efforts, and long-term monitoring programs across all environments, as well as properly defining the quality and extent of impacts if present.</p>

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Non-native mollusc species in Brazil: a first national inventory and distributional overview

  • 期刊论文

  • 发表日期：

    2026年4月4日

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  • Fabrizio Marcondes Machado,
  • Rodrigo B. Salvador,
  • Igor C. Miyahira,
  • Luiz Ricardo Lopes de Simone,
  • Tarcilla C. de Lima,
  • Mariana Osório Côrtes,
  • Julia D. Sigwart,
  • Angie Patiño Montoya,
  • Vanessa S. Amaral,
  • Paula Spotorno,
  • Marcel Sabino Miranda,
  • Augusto L. Ferreira Júnior,
  • Cristina A. Rocha-Barreira,
  • Manuella Feitosa Leal,
  • Maria Júlia Martins Silva,
  • Lenita de F. Tallarico,
  • Eliane P. Arruda,
  • Susete Wambier Christo,
  • Sonia Barbosa dos Santos,
  • Suzete Gomes,
  • Silvana C. Thiengo,
  • Ellano José da Silva,
  • Larissa Teixeira,
  • Ximena Ovando,
  • Jucicleide Ramos-de-Souza,
  • Juliana Bastos de Tolla,
  • Janine Oliveira Arruda

摘要

Biological invasions are among the leading drivers of global biodiversity loss, yet in Brazil, the diversity and impacts of non-native invertebrates remain poorly documented, mostly focusing on fishes, arthropods, and mammals. Here, we present the first comprehensive inventory of non-native molluscs in Brazil, revealing a more than 200% increase—from 26 to 82 species—over the past 15 years. This updated list includes representatives of Gastropoda and Bivalvia, and, for the first time, Polyplacophora and Cephalopoda. Each species was categorized according to introduction status: contained, detected, established, invasive, or data deficient; cryptogenic species were listed separately. In total, 82 non-native and 13 cryptogenic species were listed. Among the former, 12 species are contained, 18 detected, 20 established, 20 invasive, and 12 data deficient. These species are divided unevenly across environments: marine/estuarine (32 non-native, 4 cryptogenic), freshwater (17 non-native), and terrestrial (33 non-native, 9 cryptogenic). Our findings underscore the accelerating rate of non-native mollusc introductions, persistent taxonomic and ecological knowledge gaps, and the urgent need to strengthen biosecurity measures, early detection efforts, and long-term monitoring programs across all environments, as well as properly defining the quality and extent of impacts if present.