Ceratium furcoides (Levander) Langhans in reservoirs at the Ebro watershed, Spain and Sao Paulo state, Brazil

Autores/as

  • María Dolores Sendra Instituto Cavanilles de Biodiversidad y Biología Evolutiva (ICBIBE). Universitat de València, 46980 Paterna, Spain.
  • Viviane Moschini-Carlos Departamento de Engenharia Ambiental, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Instituto de Ciência e Tecnología, Campus de Sorocaba. Sorocaba-SP, Brasil
  • Marcelo L. M. Pompêo Departamento de Ecologia. Instituto de Biociências, Universidade de São Paulo (USP), Brasil.
  • Xavier Soria Instituto Cavanilles de Biodiversidad y Biología Evolutiva (ICBIBE). Universitat de València, 46980 Paterna, Spain.
  • Juan Miguel Soria Instituto Cavanilles de Biodiversidad y Biología Evolutiva (ICBIBE). Universitat de València, 46980 Paterna, Spain.
  • Eduardo Vicente Instituto Cavanilles de Biodiversidad y Biología Evolutiva (ICBIBE). Universitat de València, 46980 Paterna, Spain.

Resumen

This study compares the morphological characteristics of the dinoflagellate Ceratium furcoides from three Ebro basin reser­voirs (Spain) and from six reservoirs at São Paulo state (Brazil) with the aim to identify the distinct morphotypes of Ceratium furcoides in Spain and Brazil. We studied the physical and chemical variables to determine the trophic state of each reservoir. Unlike Ceratium hirundinella, Ceratium furcoides is not a frequent species within the plankton community at Ebro Basin reservoirs, however, this species has been responsible of one monospecific bloom at El Val reservoir. Nevertheless, both Ce-ratium species are considered invasive in South America. Ceratium furcoides has displaced C. hirundinella at São Paulo state reservoirs, reaching high densities, to the extent of forming monospecific blooms. Morphometric analysis was performed by optic and electronic microscopy (DIC and SEM respectively). The analysis shows significant differences in: i) total cell length, ii) horns length and iii) presence or absence of a fourth horn. While the microscopic study allows differentiating morphotypes according to the reservoir typology, a deeper study using molecular genetic techniques on the different populations of C. fur­coides would allow to know better the relationship between the dinoflagellate dynamics and the reservoirs trophic states.

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Publicado

2022-06-07

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