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Characterization of the Skin Cultivable Microbiota Composition of the Frog Pelophylax perezi Inhabiting Different Environments

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  • Diogo Neves Proença

    (Department of Life Sciences and Centre for Mechanical Engineering, Materials and Processes, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
    Diogo Neves Proença and Emanuele Fasola contributed equally to this work.)

  • Emanuele Fasola

    (CESAM and Department of Biology, University of Aveiro, 3810-005 Aveiro, Portugal
    Diogo Neves Proença and Emanuele Fasola contributed equally to this work.)

  • Isabel Lopes

    (CESAM and Department of Biology, University of Aveiro, 3810-005 Aveiro, Portugal)

  • Paula V. Morais

    (Department of Life Sciences and Centre for Mechanical Engineering, Materials and Processes, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal)

Abstract

Microorganisms that live in association with amphibian skin can play important roles in protecting their host. Within the scenarios of global change, it is important to understand how environmental disturbances, namely, metal pollution, can affect this microbiota. The aim of this study is to recognize core bacteria in the skin cultivable microbiota of the Perez frog ( Pelophylax perezi ) that are preserved regardless of the environmental conditions in which the frogs live. The characterization of these isolates revealed characteristics that can support their contributions to the ability of frogs to use metal impacted environments. Frog’s skin swabs were collected from P. perezi populations that inhabit a metal-polluted site and three reference (non-metal polluted) sites. Bacterial strains were isolated, identified, and subjected to an acid mine drainage tolerance (AMD) test, collected upstream from a site heavily contaminated with metals, and tested to produce extracellular polymeric substances (exopolysaccharide, EPS). All frog populations had Acinetobacter in their cutaneous cultivable microbiota. Significant growth inhibition was observed in all bacterial isolates exposed to 75% of AMD. EPS production was considered a characteristic of several isolates. The data obtained is a preliminary step but crucial to sustain that the cultivable microbiota is a mechanism for protecting frogs against environmental contamination.

Suggested Citation

  • Diogo Neves Proença & Emanuele Fasola & Isabel Lopes & Paula V. Morais, 2021. "Characterization of the Skin Cultivable Microbiota Composition of the Frog Pelophylax perezi Inhabiting Different Environments," IJERPH, MDPI, vol. 18(5), pages 1-13, March.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:5:p:2585-:d:510819
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    References listed on IDEAS

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    1. J. Alan Pounds & Martín R. Bustamante & Luis A. Coloma & Jamie A. Consuegra & Michael P. L. Fogden & Pru N. Foster & Enrique La Marca & Karen L. Masters & Andrés Merino-Viteri & Robert Puschendorf & S, 2006. "Widespread amphibian extinctions from epidemic disease driven by global warming," Nature, Nature, vol. 439(7073), pages 161-167, January.
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