caa a22 4500 605509255 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10452-015-9524-5 doi (NATIONALLICENCE)springer-10.1007/s10452-015-9524-5 Is the future blue-green or brown? The effects of extreme events on phytoplankton dynamics in a semi-arid man-made lake [Elektronische Daten] [Luciana de Medeiros, Arthur Mattos, Miquel Lürling, Vanessa Becker] In arid and semi-arid regions, a hydrological regime characterized by an annual cycle of drought and rainy seasons changes the volume and retention time of reservoirs. Such changes affect the limnological characteristics and lead to changes on phytoplankton community. Phytoplankton seasonal succession was studied in a Brazilian eutrophic semi-arid water supply reservoir (Cruzeta). In this study, the changes in the biomass and species composition of phytoplankton during two annual hydrological cycles were analyzed, and the driving factors were evaluated. The composition of phytoplankton alternated between filamentous cyanobacteria, such as Cylindrospermopsis raciborskii, under conditions of mixing, and colonial species, such as Microcystis panniformis and Sphaerocavum brasiliensis, under conditions of high water column stability. The lower water level during a severe drought favored adaptive phytoplankton species with low requirement for resources, such as diatoms and cryptomonads. Extreme events, i.e., torrential rains and severe droughts, governed by the hydrological regime of the semi-arid region led to strong altered availability of resources in the watershed, directing the spatial and temporal dynamics of the phytoplankton in the Cruzeta man-made lake. The results showed an unusual behavior of the phytoplankton community contradicting the expectations about the climatic change scenario. Instead of an expected increase in cyanobacteria, the severe drought led to low biomass and resources, favoring diatoms and cryptomonads. Springer Science+Business Media Dordrecht, 2015 Water supply reservoir nationallicence Climate change nationallicence Tropical limnology nationallicence Cyanobacterial bloom nationallicence Cryptomonads nationallicence Medeiros Luciana de Master's Program in Sanitary Engineering, Laboratory of Water Resources and Environmental Sanitation, Federal University of Rio Grande do Norte, Av. Salgado Filho 3000, 59078-970, Natal, RN, Brazil aut Mattos Arthur Master's Program in Sanitary Engineering, Laboratory of Water Resources and Environmental Sanitation, Federal University of Rio Grande do Norte, Av. Salgado Filho 3000, 59078-970, Natal, RN, Brazil aut Lürling Miquel Department of Environmental Sciences, Aquatic Ecology and Water Quality Management Group, Wageningen University, Droevendaalsesteeg 3a, 6708 PB, Wageningen, The Netherlands aut Becker Vanessa Master's Program in Sanitary Engineering, Laboratory of Water Resources and Environmental Sanitation, Federal University of Rio Grande do Norte, Av. Salgado Filho 3000, 59078-970, Natal, RN, Brazil aut Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 293-307 1386-2588 49:3<293 2015 49 10452 https://doi.org/10.1007/s10452-015-9524-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10452-015-9524-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Medeiros Luciana de Master's Program in Sanitary Engineering, Laboratory of Water Resources and Environmental Sanitation, Federal University of Rio Grande do Norte, Av. Salgado Filho 3000, 59078-970, Natal, RN, Brazil aut NATIONALLICENCE 700 1- Mattos Arthur Master's Program in Sanitary Engineering, Laboratory of Water Resources and Environmental Sanitation, Federal University of Rio Grande do Norte, Av. Salgado Filho 3000, 59078-970, Natal, RN, Brazil aut NATIONALLICENCE 700 1- Lürling Miquel Department of Environmental Sciences, Aquatic Ecology and Water Quality Management Group, Wageningen University, Droevendaalsesteeg 3a, 6708 PB, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Becker Vanessa Master's Program in Sanitary Engineering, Laboratory of Water Resources and Environmental Sanitation, Federal University of Rio Grande do Norte, Av. Salgado Filho 3000, 59078-970, Natal, RN, Brazil aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 293-307 1386-2588 49:3<293 2015 49 10452