Sensitivity of tropical cladocerans to chlorpyrifos and other insecticides as compared to their temperate counterparts

Author(s)

Raymundo, Larissa Broggio ^[1] ; Rocha, Odete ^[1] ; Moreira, Raquel Aparecida ^[2] ; Miguel, Mariana ^[2] ; Daam, Michiel Adriaan ^[3]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Ecol & Evolutionary Biol, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil

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

^[3] Univ Nova Lisboa, Fac Sci & Technol, Dept Environm Sci & Engn, CENSE, P-2829516 Quinta Da Torre, Caparica - Portugal

• Document type: Journal article
• Source: Chemosphere; v. 220, p. 937-942, APR 2019.
• Web of Science Citations: 2

Abstract

The use of temperate toxicity data in tropical risk assessments has often been disputed. Previous sensitivity comparisons between temperate and tropical species, however, have not shown a consistent sensitivity difference between climatically-distinct species. Such comparisons were often limited by a small tropical toxicity dataset. In addition, differences in the taxonomic compositions of the temperate and tropical species assemblages used to construct species sensitivity distributions curves also hampered direct comparisons (e.g. type and ration of crustaceans and insects). The aim of the present study was to compare the sensitivity of temperate and tropical cladocerans to insecticides. Acute laboratory toxicity tests were conducted with five Neotropical cladocerans exposed to a concentration series of the insecticide chlorpyrifos. Subsequently, their EC50 values were compared with those reported in the literature for non-tropical cladocerans. An additional literature toxicity data search for insecticides other than chlorpyrifos was also conducted for both temperate and tropical cladocerans to enable a comparison for a wider range of insecticides and taxa. The order of sensitivity of the native cladocerans to chlorpyrifos was Ceriodaphnia silvestrii (0.039 mu g L-1)> Diaphanosoma birgei (0.211 mu g L-1) = Daphnia laevis (0.216 mu g L-1) > Moina micrura (0.463 mu g L-1)= Macrothrix flabelligera (0.619 mu g L-1). A regulatory acceptable concentration based on temperate cladoceran toxicity data of both chlorpyrifos and other insecticides also appeared to be sufficiently protective for tropical cladoceran species. Implications for the use of temperate toxicity data in tropical risk assessments and indications for tropical cladoceran test species selection are discussed. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 17/13288-3 - Comparative study of the sensitivity of endemic cladocerans from tropical and temperate regions to the insecticide Chlorpyrifos
• Grantee: Larissa Broggio Raymundo
• Support Opportunities: Scholarships in Brazil - Scientific Initiation