Sensitivity of Daphnia spinulata Birabén, 1917 to glyphosate at different salinity levels

• Published in: Environmental science and pollution research international Vol. 31; no. 24; pp. 35308 - 35319
• Main Authors: Lares, Betsabé Ailén, Vignatti, Alicia María, Echaniz, Santiago Andrés, Cabrera, Gabriela Cecilia, Jofré, Florencia Cora, Gutierrez, María Florencia
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2024; Springer Nature B.V
• Subjects: Acute toxicity; Animals; Aquatic Pollution; Argentina; Atmospheric Protection/Air Quality Control/Air Pollution; Daphnia; Daphnia - drug effects; Earth and Environmental Science; Ecotoxicology; Endemic species; Environment; Environmental Chemistry; Environmental Health; Exposure; Glycine - analogs & derivatives; Glycine - toxicity; Glyphosate; Gold; Herbicides; Herbicides - toxicity; Lakes; longevity; Offspring; Pesticide pollution; Pesticides; pollution; progeny; Recovery; reproduction; Reproduction - drug effects; Research Article; Salinity; Salinity effects; Sensitivity; species; Toxicity testing; Waste Water Technology; Water Management; Water Pollutants, Chemical - toxicity; Water Pollution Control; Zooplankton; Argentina; Climate change; Pesticide; Toxicity; Salinization; Daphnia; Agriculture; Cladocerans; Glyphosate
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-024-33586-2

Daphnia spinulata Birabén, 1917 is an endemic cladoceran species, frequent in the zooplankton communities of the shallow lakes of the Pampean region of Argentina. These lakes have varying salinity levels and, being located in agricultural areas, are frequently subject to pesticide pollution. This study aimed to determine the effects of the herbicide glyphosate (Panzer Gold®) in combination with different salinity levels on the biological parameters of D. spinulata and its recovery ability after a short exposure. Three types of assays were performed: an acute toxicity test, a chronic assessment to determine survival, growth and reproduction, and recovery assays under optimal salinity conditions (1 g L −1 ). The LC 50 -48 h of glyphosate was 7.5 mg L −1 (CL 3.15 to 11.72). Longevity and the number of offspring and clutches were significantly reduced due to the combined exposure of glyphosate and increased salinity. The timing of the first offspring did not recover after glyphosate exposure. Our results reveal that D. spinulata is sensitive to the herbicide Panzer Gold® at concentrations well below those indicated in the safety data sheet of this commercial formulation, which causes stronger negative effects in conditions of higher salinity. Further research is needed to shed light on the sensitivity of this cladoceran to glyphosate and its variability under other interactive stress factors.