Agricultural pesticide use has increased worldwide during the last several decades, but the long-term fate, storage, and transfer dynamics of pesticides in a changing environment are poorly understood. Many pesticides have been progressively banned, but in numerous cases, these molecules are stable and may persist in soils, sediments, and ice. Many studies have addressed the question of their possible remobilization as a result of global change. In this article, we present a retro-observation approach based on lake sediment records to monitor micropollutants and to evaluate the long-term succession and diffuse transfer of herbicides, fungicides, and insecticide treatments in a vineyard catchment in France. The sediment allows for a reliable reconstruction of past pesticide use through time, validated by the historical introduction, use, and banning of these organic and inorganic pesticides in local vineyards. Our results also revealed how changes in these practices affect storage conditions, consequently, the pesticides ' transfer dynamics. For example, the use of postemergence herbicides (glyphosate), which induce an increase in soil erosion, led to a release of a banned remnant pesticide (dichlorodiphenyltrichloroethane, DDT), which had been previously stored in vineyard soil, back into the environment. Management strategies of ecotoxicological risk would be well served by recognition of the diversity of compounds stored in various environmental sinks, such as agriculture soil, and their capability to become sources when environmental conditions change.
Sabatier, P., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France; Poulenard, J., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France; Fangeta, B., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France; Reyss, J.-L., Laboratoire des Sciences du Climat et de l'Environnement, Université de Versailles Saint- Quentin, Commissariat À L 'Energie Atomique- CNRS, Gif-sur-Yvette, 91198, France; Develle, A.-L., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France; Wilhelm, B., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France, Institute of Geological Sciences, University of Bern, Bern, 3012, Switzerland; Ployon, E., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France; Pignol, C., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France; Naffrechoux, E., Laboratoire de Chimie Moléculaire et Environnement, Université de Savoie, Le Bourget du Lac, 73376, France; Dorioz, J.-M., Centre Alpin de Recherche Sur Les Réseaux Trophiques des Ecosystème Limniques, Université de Savoie, Institut National de la Recherche Agronomique, Thonon-les-Bains, 74203, France; Montuelle, B., Centre Alpin de Recherche Sur Les Réseaux Trophiques des Ecosystème Limniques, Université de Savoie, Institut National de la Recherche Agronomique, Thonon-les-Bains, 74203, France; Arnaud, F., Environnement, Dynamique et Territoires de Montagne, Université de Savoie CNRS, 73373 Le Bourget du Lac, France
Recommended Citation:
Sabatier P.,Poulenard J.,Fangeta B.,et al. Long-term relationships among pesticide applications;mobility; and soil erosion in a vineyard watershed[J]. Proceedings of the National Academy of Sciences of the United States of America,2014-01-01,111(44)