1. Earthworm bioturbation influences the phytoavailability of metals released by particles in cultivated soils
- Author
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Tiantian Xiong, Yann Foucault, Camille Dumat, Yvan Capowiez, Thibaut Leveque, Eva Schreck, Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Agence de l'Environnement et de la Maîtrise de l'Energie (ADEME), Unité de recherche Plantes et Systèmes de Culture Horticoles (PSH), Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Société de Traitement Chimique des Métaux - STCM (FRANCE), Univ Toulouse, INP ENSAT, F-31326 Castanet Tolosan, France, Partenaires INRAE, INSU-EC2CO program, French Agency of the Environment and Energy (ADEME), Chemical Metal Treatments Company (STCM), National Research Agency [ANR-12-0011-VBDU], and ADEME, France
- Subjects
Crops, Agricultural ,[SDV]Life Sciences [q-bio] ,Health, Toxicology and Mutagenesis ,Soil biology ,Soil characteristics ,010501 environmental sciences ,Toxicology ,Plant Roots ,01 natural sciences ,Soil ,Earthworm bioturbation ,Phytoavailability ,Soil pH ,Animals ,Soil Pollutants ,Organic matter ,Oligochaeta ,0105 earth and related environmental sciences ,2. Zero hunger ,chemistry.chemical_classification ,biology ,Soil organic matter ,Earthworm ,04 agricultural and veterinary sciences ,General Medicine ,Lettuce ,15. Life on land ,biology.organism_classification ,Pollution ,chemistry ,Agronomy ,Metals ,13. Climate action ,[SDE]Environmental Sciences ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Bioturbation - Abstract
International audience; The influence of earthworm activity on soil-to-plant metal transfer was studied by carrying out six weeks mesocosms experiments with or without lettuce and/or earthworms in soil with a gradient of metal concentrations due to particles fallouts. Soil characteristics, metal concentrations in lettuce and earthworms were measured and soil porosity in the mesocosms was determined. Earthworms increased the soil pH, macroporosity and soil organic matter content due to the burying of wheat straw provided as food. Earthworm activities increased the metals concentrations in lettuce leaves. Pb and Cd concentrations in lettuce leaves can increase up to 46% with earthworm activities ... These results and the low correlation between estimated by CaCl2 and EDTA and measured pollutant phytoavailability suggest that earthworm bioturbation was the main cause of the increase. Bioturbation could affect the proximity of pollutants to the roots and soil organic matter.
- Published
- 2014