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The Cultural Value of Invasive Species: A Case Study from Semi–Arid Northeastern Brazil

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An Erratum to this article was published on 18 September 2014

The Cultural Value of Invasive Species: A Case Study from Semi–Arid Northeastern Brazil. Invasive species are often considered the pariahs of the plant kingdom. In this study, we investigate the utility of native and exotic invasive plants to local residents in a semi–arid area of northeastern Brazil. We address the following questions: Are invasive species considered useful? How are they useful? Are they more or less useful than non–invasive species? Is there a relationship between use categories and taxonomic groups (families, genera, and species)? What plant parts are preferentially used and how are they distributed by categories of usage? And are there differences in the perceived usefulness of native vs. exotic invasive plants? We employed plot sampling of vegetation in anthropogenic habitats. Semi–structured, checklist interviews were carried out with 106 individuals. A total of 56 invasive species were recorded, of which 55 were considered useful. There was no statistical difference in the perceived utility of native vs. exotic invasive species; however, invasive species overall were considered useful more often than non–invasive species. The predominant use was as animal fodder, followed by medicine, food, and technology. Nearly half (44%) of the animal fodder species also served as medicine for people. Herbaceous plants were the most common. Uses varied significantly within taxonomic ranks (species, genus, and family). The most recognized plants were those that are most used locally. This study underscores the value of invasive species in semi–arid Brazil, as well as the need to include local people in regional and national strategies to address invasive species management.

O Valor Cultural das Espécies Invasoras: Um Estudo de Caso no Semiárido do Nordeste do Brasil. As espécies invasoras são muitas vezes consideradas as párias do reino vegetal. Neste estudo, investigamos a utilidade de plantas invasoras nativas e exóticas para moradores locais no semiárido nordestino do Brasil. Nós procuramos responder as seguintes questões: São as espécies invasoras consideradas úteis? Como? São elas mais úteis que as espécies não invasoras? Existem relações entre categorias de uso e os grupos taxonômicos (famílias, gêneros e espécies)? Quais partes das plantas são preferencialmente usadas e como elas estão distribuídas por categorias de uso? E existem diferenças na utilidade percebida entre plantas nativas e exóticas invasoras? Nós empregamos o método de parcelas para a amostragem de vegetação em ambientes antropogênicos. Entrevistas semi–estruturadas foram realizadas com 106 pessoas. Um total de 56 espécies invasoras foram registradas, das quais 55 foram consideradas úteis. Não houve diferença estatística na percepção de utilidade das espécies invasoras nativas versus exóticas, no entanto, as espécies invasoras no geral (nativas e exóticas) foram frequentemente consideradas mais úteis do que as plantas citadas como não invasoras. O uso predominante foi o forrageiro, seguido do medicinal, alimentício e tecnológico. Quase metade (44%) das espécies forrageiras são reportadas como medicamento. Houve diferenças significativas entre os usos e categorias taxonômicas (espécies, gêneros e famílias). As plantas mais reconhecidas foram também as mais usadas localmente. Este estudo ressalta o valor de espécies invasoras no semiárido do Brasil, bem como a necessidade de incluir a população local em estratégias regionais e nacionais para lidar com a gestão de espécies invasoras.

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Acknowledgements

The authors would like to thank the members of the communities of Minguiriba and Riachão de Malhada de Pedra for their time, hospitability, and effective participation in all stages of the work, and to CAPES for the study grant provided to the first author and CNPq to the productivity grant awarded to UPA. To members of the Laboratory of Applied and Theoretical Ethnobiology (LEA), especially to Luciana Gomes de Sousa Nascimento, Luciani Abisagui Batista Leite, and Washington Soares Ferreira Júnior, thank you for valuable assistance in the field and in the laboratory, and to Josiene Falcão Fraga dos Santos, Renata Kelly Dias, and Luciana dos Santos Dias de Oliveira for their support on the field. We also thank the anonymous reviewers of this manuscript. This paper is contribution P019 of the Rede de Investigação em Biodiversidade e Saberes Locais (REBISA–Network of Research in Biodiversity and Local Knowledge), with financial support from FACEPE (Foundation for Support of Science and Technology) to the project Núcleo de Pesquisa em Ecologia, conservação e Potencial de Uso de Recursos Biológicos no Semiárido do Nordeste do Brasil (Center for Research in Ecology, Conservation and Potential Use of Biological Resources in the Semi–Arid Region of Northeastern Brazil–APQ–1264–2.05/10).

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Correspondence to Lucilene Lima dos Santos or Ulysses Paulino Albuquerque.

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Submitted 22 November 2013; Accepted 4 June 2014

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dos Santos, L.L., do Nascimento, A.L.B., Vieira, F.J. et al. The Cultural Value of Invasive Species: A Case Study from Semi–Arid Northeastern Brazil. Econ Bot 68, 283–300 (2014). https://doi.org/10.1007/s12231-014-9281-8

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