Abstract
The number of periphytic algae species in floodplain lakes is strongly related to the flood pulse. Necessarily, algae dynamics are linked to some hydrological attributes such as the frequency, duration and intensity of the pulse. We analysed the variation in richness of the periphytic algae community over eight years (2000–2007). Our aims were (1) to examine periphytic algae richness and its relationship with the pulse regime and (2) to verify temporal changes of this richness in response to frequency, amplitude and intensity attributes. We analysed the potamophase and limnophase periods over the years using the fFITRAS function. Simple regressions were performed to reveal the influence of hydrological attributes on the richness of the periphytic algal community. The hydrological regime presented wide hydrometric-level variation among years, and we verified the predominance of the limnophase periods. Periphytic algae richness was high (371 taxa), presented wide oscillations ranging from 68 to 169 among the years and showed a tight correlation with flood pulse intensity. Our results highlight that the hydrological regime was the main factor structuring the richness pattern of the periphytic algae community in a floodplain environment. Furthermore, the results showed that temporal variations of the periphytic algae richness were related to shifts in flood pulse intensity, suggesting that this attribute is a key factor for periphytic algae communities in the floodplain environment and is important to be considered in studies covering long time series.
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Acknowledgements
This study was part of Projeto PELD/CNPq (Pesquisas Ecológicas de Longa Duração/Conselho Nacional de Pesquisas, “A Planície Alagável do Alto Rio Paraná”—Site 6). We thank Research Nucleus in Limnology, Ichthyology and Aquaculture of Maringa State University for the field support and CNPq and Capes for the Masters scholarships granted to Natália S. Siqueira, Vanessa M. Algarte, Daiane T. Ruwer and Nicolli C. Osório and for the productivity fellowship for Liliana Rodrigues.
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Algarte, V.M., Siqueira, N.S., Ruwer, D.T. et al. Richness of periphytic algae and its relationship with hydrological attributes. Braz. J. Bot 40, 735–740 (2017). https://doi.org/10.1007/s40415-017-0383-2
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DOI: https://doi.org/10.1007/s40415-017-0383-2