Ecotoxicological relevance of glyphosate and flazasulfuron to soil habitat and retention functions - Single vs combined exposures

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Soares, C (Author) FCUP; Fernandes, B (Author) Other; Paiva, C (Author) Other; Nogueira, V (Author) FCUP; Cachada, A (Author) FCUP; Fernanda Fidalgo (Author) FCUP; Ruth Pereira (Author) FCUP

Journal

Title: Journal of Hazardous Materials

Vol. 442

ISSN: 0304-3894

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-00X-CYB

DOI: 10.1016/j.jhazmat.2022.130128

Abstract (EN): Glyphosate (GLY) and flazasulfuron (FLA) are two non-selective herbicides commonly applied together. However, research focused on their single and combined ecotoxicological impacts towards non-target organisms is still inconclusive. Therefore, this study aimed to test their single effects on soil's habitat and retention functions, and to unravel their combined impacts to earthworms and terrestrial plants. For this, ecotoxicological assays were performed with plants (Medicago sativa), oligochaetes (Eisenia fetida) and collembola (Folsomia candida). Soil elutriates were also prepared and tested in macrophytes (Lemna minor) and microalgae (Raphidocelis subcapitata). FLA (82-413 mu g kg(-1)) reduced earthworms' and collembola's reproduction and severely impaired M. sativa growth, being much more toxic than GLY (up to 30 mg kg(-1)). In fact, the latter only affected plant growth (>= 9 mg kg(-1)) and earthworms (>= 13 mg kg(-1)), especially at high concentrations, with no effects on collembola. Moreover, only elutriates from FLA-contaminated soils significantly impacted L. minor and R. sucapitata. The experiments revealed that the co-exposure to GLY and FLA enhanced the toxic effects of contaminated soils not only on plants but also on earthworms'. However, such increase in toxicity was dependent

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12