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Hydrobiologia

, Volume 614, Issue 1, pp 47–54 | Cite as

Hydrological complexity supports high phytoplankton richness in the Doñana marshland (SW Spain)

  • I. Reyes
  • M. A. Casco
  • J. Toja
  • L. Serrano
PLANKTON STUDIES

Abstract

Two hundred and twenty-four phytoplanktonic taxa were recorded in a riverine floodplain on the NE side of the Doñana marshland from September 2002 to 2004. This collection of 11 samples included 80 Bacillariophyceae (Diatoms), 71 Chlorophyta, 39 Cyanophyta, 19 Euglenophyta, 6 Chrysophyceae, 5 Cryptophyta, and 4 Dinophyceae. Fifty-five percent of the total taxa had a very low frequency of appearance (<5%), while only three species appeared with a frequency >90% (Monoraphidium contortum Komárková-Legnevorá, Cyclotella atomus Hustedt, and Nitzschia palea W. Smith). According to multivariate analyses, both temporal and spatial factors produced a pattern in the phytoplankton assemblages dominated by freshwater inputs during winter flooding, tidal inputs in summer, and transitional stages during the rest of the year. Spatial segregation of phytoplankton was likely due to differences in retention time and distance to water input. The main taxa involved in this segregation were Chrysidalis sp. 1 (June 2003 and 2004), Chlamydomonas sp. 4 (September 2003), C. atomus (December 2003), and Tetradesmus aff. crocini (February 2004). The hydrologic complexity of the study area could account for this high taxa richness by promoting replacement and colonization episodes following seasonal changes in water source (freshwater versus tidal inputs).

Keywords

Mediterranean coastal wetlands Rice-pads Guadiamar River 

Notes

Acknowledgements

We are very grateful to Pilar and Julio, to the rangers of Doñana Natural Park, and to our colleagues Gonzalo Martin, Arantza Arechederra, Marta Reina, David León, Virgilio Hermoso, Paco Blanco, and Pepe Prenda. This work was partly founded by the Consejería de Medio Ambiente, Junta de Andalucía.

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Plant Biology and Ecology DepartmentUniversity of SevillaSevillaSpain
  2. 2.División Científica FicologíaFacultad de Ciencias Naturales y Museo, UNLP, CONICETLa PlataArgentina

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