Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6797
Título: Toxicity of cadmium and zinc on two microalgae, Scenedesmus obliquus and Desmodesmus pleiomorphus, from Northern Portugal
Autor: Monteiro, Cristina M.
Fonseca, Susana C.
Castro, Paula M. L.
Malcata, F. Xavier
Palavras-chave: Microalgae
Heavy metals
Weibull model
Data: 2011
Editora: Springer Verlag
Citação: MONTEIRO, Cristina M... [et al.] - Toxicity of cadmium and zinc on two microalgae, Scenedesmus obliquus and Desmodesmus pleiomorphus, from Northern Portugal. Journal of Applied Phycology. ISSN 1573-5176. Vol. 23, n.º 1 (2011), p. 97-103
Resumo: Aquatic environments often contain toxic heavy metals that may enter the food web via uptake by microalgae and eventually cause severe poisoning problems at higher trophic levels. The effects of Cd and Zn cations upon growth of two native green microalgal species, Scenedesmus obliquus and Desmodesmus pleiomorphus (previously isolated from a polluted site in Northern Portugal), were accordingly evaluated. Growth inhibition of the microalgal cells was determined following exposure for 96 h to several initial concentrations of aqueous solutions of either of those two metals. At the higher end of Cd and Zn experimental concentration ranges, a significant reduction in cell density was observed in the cultures; EC50 values, calculated after fitting a Weibull model to the experimental data, were 0.058 and 1.92 mg L−1 for Cd and 16.99 and 4.87 mg L−1 for Zn in the case of S. obliquus and D. pleiomorphus, respectively. One observed that S. obliquus can tolerate higher Zn concentrations than D. pleiomorphus, but the reverse holds regarding exposure to Cd.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6797
Versão do Editor: The original publication is available at www.springerlink.com
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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