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Naturally and Environmentally Driven Variations in Diatom Morphology: Implications for Diatom-Based Assessment of Water Quality

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Modern Trends in Diatom Identification

Part of the book series: Developments in Applied Phycology ((DAPH,volume 10))

Abstract

Diatom identification must consider the large variability in both morphological and morphometric features, characteristic of this group of microorganisms. This chapter describes variations in shape/size observed in diatom populations either as a consequence of their particular asexual reproductive cycle or induced by environmental conditions. Concerning this latter, teratological diatoms are commonly associated with a variety of environmental stressors, particularly the presence of micropollutants in the aquatic ecosystem, such as heavy metals. We evidence an overestimation of water quality conditions caused by overriding deformed individuals in diatom-based biomonitoring studies. It can be shown that normal and aberrant forms of the same taxon differ in autecological preferences. Finally, we advise on a critical issue in the description of diatom specimens, that is, the sample size on which morphometric ranges should be provided. The section concludes with some recommendations in this regard.

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Acknowledgments

The present contribution was financially supported by a grant of the Romanian National Authority for Scientific Research, CCCDI—UEFISCDI, project 3-005 Tools for sustainable gold mining in EU (SUSMIN). A. González kindly helped us in Sect. 4.4.

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Authors and Affiliations

  1. Faculty of Environmental Science and Engineering, Babes-Bolyai University, Cluj-Napoca, Romania

    Adriana Olenici & Călin Baciu

  2. Institute of Environment, Leon, Spain

    Adriana Olenici

  3. Departamento de Biodiversidad y Gestión Ambiental, Facultad de Ciencias Biológicas y Ambientales, Universidad de León, León, España

    Saúl Blanco

  4. Laboratorio de diatomología y calidad de aguas, Instituto de Investigación de Medio Ambiente, Recursos Naturales y Biodiversidad, León, Spain

    Saúl Blanco

  5. Unité de Recherche EABX, Irstea, Cestas Cedex, France

    Soizic Morin

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  1. Adriana Olenici
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  2. Călin Baciu
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  3. Saúl Blanco
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  4. Soizic Morin
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Correspondence to Adriana Olenici .

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Editors and Affiliations

  1. Instituto de Optica (CSIC), Madrid, Spain

    Gabriel Cristóbal

  2. Facultad de Ciencias Biológicas y Ambientales, Departamento de Biodiversidad y Gestión Ambiental, Universidad de León, Laboratorio de diatomología y calidad de aguas, Instituto de Investigación de Medio Ambiente, Recursos Naturales y Biodiversidad, León, Spain

    Saúl Blanco

  3. VISILAB, Universidad de Castilla-La Mancha, Ciudad Real, Spain

    Gloria Bueno

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Olenici, A., Baciu, C., Blanco, S., Morin, S. (2020). Naturally and Environmentally Driven Variations in Diatom Morphology: Implications for Diatom-Based Assessment of Water Quality. In: Cristóbal, G., Blanco, S., Bueno, G. (eds) Modern Trends in Diatom Identification. Developments in Applied Phycology, vol 10. Springer, Cham. https://doi.org/10.1007/978-3-030-39212-3_4

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