Is the future blue-green or brown? The effects of extreme events on phytoplankton dynamics in a semi-arid man-made lake

Becker, Vanessa; Medeiros, Luciana de Castro; Mattos, Arthur; Lurling, Miquel

Is the future blue-green or brown? The effects of extreme events on phytoplankton dynamics in a semi-arid man-made lake

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dc.contributor.author	Becker, Vanessa
dc.contributor.author	Medeiros, Luciana de Castro
dc.contributor.author	Mattos, Arthur
dc.contributor.author	Lurling, Miquel
dc.date.accessioned	2020-12-08T23:15:27Z
dc.date.available	2020-12-08T23:15:27Z
dc.date.issued	2015-06-03
dc.description.resumo	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 semiarid 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	pt_BR
dc.identifier.citation	MEDEIROS, Luciana de Castro; MATTOS, Arthur; LÜRLING, Miquel; BECKER, Vanessa. Is the future blue-green or brown? The effects of extreme events on phytoplankton dynamics in a semi-arid man-made lake. Aquatic Ecology, [S.L.], v. 49, n. 3, p. 293-307, 3 jun. 2015. Springer Science and Business Media LLC. Dispoível em <https://link.springer.com/article/10.1007%2Fs10452-015-9524-5>. Acesso em 20 out 2020. http://dx.doi.org/10.1007/s10452-015-9524-5.	pt_BR
dc.identifier.doi	10.1007/s10452-015-9524-5
dc.identifier.issn	1573-5125
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/30927
dc.language	en	pt_BR
dc.publisher	Springer	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Water supply reservoir	pt_BR
dc.subject	Climate change	pt_BR
dc.subject	Tropical limnology	pt_BR
dc.subject	Cyanobacterial bloom	pt_BR
dc.subject	Cryptomonads	pt_BR
dc.title	Is the future blue-green or brown? The effects of extreme events on phytoplankton dynamics in a semi-arid man-made lake	pt_BR
dc.type	article	pt_BR