Effects of Phosphorus and Zinc on the Neotropical Cladoceran Ceriodaphnia silvestrii by Dietary Routes

Author(s)

Rodgher, Suzelei ^[1] ; de Paulo, Fernanda Campos ^[1] ; Costa, Marina Grandchamp ^[1] ; Contador, Thais Miike ^[1] ; Rocha, Giseli Swerts ^[2] ; Gaeta Espindola, Evaldo Luiz ^[2]

Affiliation

^[1] Univ Estadual Paulista UNESP, Inst Ciencia & Tecnol, Campus Sao Jose dos Campos, BR-12247004 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Sao Paulo, Escola Engn Sao Carlos, NEEA CRHEA SHS, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: WATER AIR AND SOIL POLLUTION; v. 231, n. 1 JAN 2 2020.
• Web of Science Citations: 1

Abstract

Aquatic systems are seldom disturbed by a single stressor agent. Considering that nutrients and metals occur simultaneously in the environment, studies on the combined effects of these elements on the biota need to be carried out. The aim of this study was to evaluate the effect of the microalga Raphidocelis subcapitata exposed to different combinations of phosphorus (P) and zinc (Zn) on the neotropical cladoceran Ceriodaphnia silvestrii. The algae acclimated to P concentrations of 2.3x10(-4) and 2.3x10(-6) mol L-1 were exposed to concentrations of 0.10, 0.57, 1.13, and 2.27x10(-6) mol Zn2+ L-1. The P acclimated algal cells showed different capacity to deal with external free Zn level, resulting in higher susceptibility to metal as P decreased in the test medium. Elevated cell metal values were observed in R. subcapitata acclimated to 2x10(-6) mol P L-1 and exposed to Zn, as compared to the values found in the microalga exposed to 2x10(-4) mol P L-1. A significant reduction in number of newborn produced by cladoceran was verified when the organism was fed alga containing 47x10(-15) g Zn cell(-1) (2 neonates per female) and 60x10(-15) g Zn cell(-1) (5 neonates per female). It was observed a decrease of 90% of C. silvestrii survival for the treatment with 47x10(-15) and 60x10(-15) g Zn cell(-1). Algal cells acclimated to high and low concentrations of P were an important exposure route to Zn for C. silvestrii. (AU)

• FAPESP's process: 15/19415-1 - Analyze of phosphorus effect on zinc toxicity to microalgae Raphidocelis subcapitata
• Grantee: Thais Miike Contador
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 15/23951-6 - Analyze of phosphorus effect on zinc toxicity to planktonic organisms
• Grantee: Suzelei Rodgher
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/22620-9 - Toxicity of algal cells exposed to the phosphorus and zinc to the cladoceran Ceriodaphnia silvestrii
• Grantee: Fernanda Campos de Paulo
• Support Opportunities: Scholarships in Brazil - Scientific Initiation