Affiliation:
1. Sustainability Studies Program, School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-3435, USA
Abstract
To establish meaningful policy directives for sustainable agrochemical use, we require baseline knowledge of the impacts of agrochemicals on non-target organisms. The widespread use of the herbicide glyphosate has resulted in the global presence of its metabolite, aminomethylphosphonic acid (AMPA). AMPA is commonly found in water bodies, including freshwater systems. We investigated the effects of AMPA exposure on the survivorship, regenerative abilities, and locomotion of the brown planarian (Girardia tigrina), a water-dwelling flatworm commonly found in freshwater ecosystems. In a series of experiments, we bisected and then exposed planarians to realistic field doses of AMPA for seven days and then fourteen days. For the 14-day experiment, we exposed planarians to two concentrations consistent with the high and low ranges of concentrations observed in water systems. Compared to the control group, we found that planarians exposed to AMPA for fourteen days (un-bisected for the first seven days and recovering from bisection for the subsequent seven) exhibited slower regeneration from the tail segment. Our findings highlight the potential ecological impacts of AMPA contamination on planarian populations. Quantifying the effects of AMPA exposure on planarians contributes to our understanding of the ecological consequences of our current and common agricultural practices on our freshwater ecosystems.
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference44 articles.
1. Concerns over use of glyphosate-based herbicides and risks associated with exposures: A consensus statement;Myers;Environ. Health,2016
2. Integrated weed management strategies in a long-term crop rotation system;Rudell;Weed Sci.,2023
3. Evolution of glyphosate-resistant weeds;Baek;Rev. Environ. Contam. T,2021
4. Glyphosate and its degradation product AMPA occur frequently and widely in US soils, surface water, groundwater, and precipitation;Battaglin;JAWRA,2014
5. Effects of glyphosate and its commercial formulation, Roundup® Ultramax, on liver histology of tadpoles of the neotropical frog, Leptodactylus latrans (amphibia: Anura);Bach;Chemosphere,2018