Work

Nutrients and temperature interact with trifloxystrobin on the growth of three aquatic hyphomycete species

Year: 2025

Type: article

Abstract: Aquatic hyphomycetes (AHs) are a group of fungi central for the decomposition of organic material in aquatic systems. Despite their ecological relevance, ecotoxicological studies involving AHs are fairly scarce. With the aim to better understand AH responses to changes in abiotic factors and increasing levels of contaminants, we explored their sensitivity in a multifactorial approach. Therefore, we assessed the radial growth response of three AH species (Alatospora acuminata, Articulospora tetracladia, and Tetracladium marchalianum) to three temperatures (12, 16, and 20 °C) and nutrient levels (0.0, 0.5, and 1.5% malt extract, w/v) in combination with increasing concentrations of the model fungicide trifloxystrobin (0 to 625 µg/L) over 21 days. The results showed a significant interaction between factors, with temperature being the most significant by potentiating trifloxystrobin toxicity for AH growth. The fungicide affected AH species in the low µg/L range with the lowest effect concentration of 0.1 µg/L for A. tetracladia. Previous study points to a regulatory acceptable concentration of 0.1 µg/L based on the ecotoxicological data of the most sensitive groups reported, which did not include AHs. Particularly in light of the ecological importance of them, their sensitivity to trifloxystrobin shown in our study highlights a fundamental concern when projecting the environmental risk of pesticides that directly affect aquatic fungi.

Source: Environmental Toxicology and Chemistry

DOI: 10.1093/etojnl/vgaf297

Authors: Laís Conceição Menezes da Silva, Isdore Ogechi Agim, Alexander Feckler, Johannes Raths, Mirco Bundschuh

Institutions: Universidade Federal de São Carlos, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, ETH Zurich, Institute of Biogeochemistry and Pollutant Dynamics, Swiss Federal Institute of Aquatic Science and Technology

Language: English

Topic: Environmental Toxicology and Ecotoxicology

Subfield: Health, Toxicology and Mutagenesis

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Zero hunger

Open Access status: green

Funders: National Science Foundation, Alexander von Humboldt-Stiftung, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior