Effect of phosphorus on the toxicity of zinc to the microalga Raphidocelis subcapitata

Autor(es)

Rodgher, Suzelei ^[1] ; Contador, Thais M. ^[1] ; Rocha, Giseli S. ^[2] ; Espindola, Evaldo L. G. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Inst Ciencia & Tecnol UNESP SJC, Dept Engn Ambiental, Parque Tecnol Sao Jose dos Campos, BR-12247016 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Sao Paulo, Escola Engn Sao Carlos, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 92, n. 2 2020.
• Citações Web of Science: 0

Resumo

The aim of this study was to evaluate the effect of phosphorus (P) on the toxicity of zinc (Zn) for the alga Raphidocelis subcapitata. P was provided in three concentrations: 2.3 x 10(-4) mol L-1, 2.3 x 10(-6) mol L(-1 )and 1.0 x 10(-6) mol L-1. Algal cells were acclimated to the specific P concentrations before the start of the experiment The chemical equilibrium software MINEQL(+) 4.61 was employed to calculate the Zn2+ concentration. After acclimated, the algal cells were inoculated into media containing different Zn concentrations (0.09 x 10(-6) mol L(-1 )to 9.08 x 10(-6) mol L-1). The study showed that besides the reduction in algal growth rates, phosphorus had an important influence on the toxicity of zinc for microalga. The inhibitory Zn2+ concentration values for R. subcapitata were 2.74 x 10(-6) mol L-1 0.58 x 10(-6) mol L-1 and 0.24 x 10(-6) mol L-1 for the microalgae acclimated at P concentrations of 2.3 x 10(-4) mol L-1, 2.3 x 10(-6) mol L-1 and 1.0 x 10(-6) mol L-1 respectively. Ecotoxicological studies should consider the interaction between metal concentrations and varying P values to provide realistic data of what occurs in phytoplankton communities in environments. (AU)

• Processo FAPESP: 15/19415-1 - Análise do efeito do fósforo sobre a toxicidade do zinco para a microalga Raphidocelis subcapitata
• Beneficiário: Thais Miike Contador
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 16/22620-9 - Toxicidade de células algais expostas ao fósforo e zinco para o cladócero Ceriodaphnia silvestrii
• Beneficiário: Fernanda Campos de Paulo
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica