The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature

Becker, Vanessa; Bonilla, Sylvia; González-Piana, Mauricio; Soares, Maria C. S.; Huszar, Vera L. M.; Somma, Andrea; Marinho, Marcelo M.; Kokocinski, Mikołaj; Dukolil, Martin; Antonaides, Dermot; Aubriot, Luis

The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature

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dc.contributor.author	Becker, Vanessa
dc.contributor.author	Bonilla, Sylvia
dc.contributor.author	González-Piana, Mauricio
dc.contributor.author	Soares, Maria C. S.
dc.contributor.author	Huszar, Vera L. M.
dc.contributor.author	Somma, Andrea
dc.contributor.author	Marinho, Marcelo M.
dc.contributor.author	Kokocinski, Mikołaj
dc.contributor.author	Dukolil, Martin
dc.contributor.author	Antonaides, Dermot
dc.contributor.author	Aubriot, Luis
dc.date.accessioned	2020-12-08T22:59:08Z
dc.date.available	2020-12-08T22:59:08Z
dc.date.issued	2016-06-22
dc.description.resumo	Toxic cyanobacterial blooms in freshwaters are thought to be a consequence of the combined effects of anthropogenic eutrophication and climate change. It is expected that climate change will affect water mixing regimes that alter the water transparency and ultimately the light environment for phytoplankton. Blooms of the potentially toxic cyanobacterium Cylindrospermopsis raciborskii are expanding from tropical towards temperate regions. Several hypotheses have been proposed to explain this expansion, including an increase in water temperature due to climate change and the high phenotypic plasticity of the species that allows it to exploit different light environments. We performed an analysis based on eight lakes in tropical, subtropical and temperate regions to examine the distribution and abundance of C. raciborskii in relation to water temperature and transparency. We then conducted a series of short-term factorial experiments that combined three temperatures and two light intensity levels using C. raciborskii cultures alone and in interaction with another cyanobacterium to identify its growth capacity. Our results from the field, in contrast to predictions, showed no differences in dominance (>40% to the total biovolume) of C. raciborskii between climate regions. C. raciborskii was able to dominate the phytoplankton in a wide range of light environments (euphotic zone=1.5 to 5 m, euphotic zone/mixing zone ratio <0.5 to >1.5). Moreover, C. raciborskii was capable of dominating the phytoplankton at low temperatures (<15°C). Our experimental results showed that C. raciborskii growing in interaction was enhanced by the increase of the temperature and light intensity. C. raciborskii growth in high light intensities and at a wide range of temperatures, suggests that any advantage that this species may derive from climate change that favors its dominance in the phytoplankton is likely due to changes in the light environment rather than changes in temperature. Predictive models that consider only temperature as a drive factor can therefore fail in predicting the expansion of this potentially toxic cyanobacterium	pt_BR
dc.identifier.citation	BONILLA, S. ; GONZALEZ-PIANA, M. ; SOARES, M. C. S. ; HUSZAR, V.L.M. ; BECKER, V. ; SOMMA, A. ; MARINHO, M. M. ; KOKOCIŃ ; DOKULIL, M. ; ANTONIADES, D. ; AUBRIOT, L. . The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature. JOURNAL OF LIMNOLOGY (ONLINE), p. 606-617, 22 jun. 2016. PAGEPress Publications.Disponível em <https://www.jlimnol.it/index.php/jlimnol/article/view/jlimnol.2016.1479> . Acesso em 20 out 2020. http://dx.doi.org/10.4081/jlimnol.2016.1479.	pt_BR
dc.identifier.doi	10.4081/jlimnol.2016.1479
dc.identifier.issn	1723-8633
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/30922
dc.language	en	pt_BR
dc.publisher	PAGEpress	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Harmful algal blooms (HABs)	pt_BR
dc.subject	Management	pt_BR
dc.subject	Climate change	pt_BR
dc.subject	Phenotypic plasticity	pt_BR
dc.subject	Water transparency	pt_BR
dc.title	The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature	pt_BR
dc.type	article	pt_BR