Effect of Geogenic Lead on Fungal and Collembolan Communities in Garden Topsoil

Sophie Joimel (1, 2, 3) , Hervé Capiaux (4, 5) , Christophe Schwartz (1) , Mickael Hedde (2, 3) , Thierry Lebeau (4, 6) , Cécile Le Guern (4, 7) , Johanne Nahmani (8) , Céline Pernin (9) , Sandrine Salmon (10) , Lucia Santorufo (1, 11) , Béatrice Béchet (4, 12) , Jérôme Cortet (8)

1 LSE - Laboratoire Sols et Environnement
2 ECOSYS - Ecologie fonctionnelle et écotoxicologie des agroécosystèmes
3 Université Paris-Saclay
4 IRSTV - Institut de Recherche en Sciences et Techniques de la Ville - FR 2488
5 IUT La Roche-sur-Yon - Institut Universitaire de Technologie - La Roche-sur-Yon
6 LPG - Laboratoire de Planétologie et Géodynamique [UMR 6112]
7 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
8 CEFE - Centre d’Ecologie Fonctionnelle et Evolutive
9 LGCgE - Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515
10 MECADEV - Mécanismes Adaptatifs et Evolution
11 University of Naples Federico II = Università degli studi di Napoli Federico II
12 IFSTTAR/AME/GEOLOC - Géolocalisation

Geogenic lead (Pb) is considered to be less bioavailable than anthropogenic Pb and exerts less effect on the soil fauna. However, Pb contamination in vegetables has been reported in the case of geogenic anomalies, even at moderate concentrations (around 170 mg kg-1). In this study, we investigated collembolan communities using both taxonomic-and trait-based approaches and observed fungal communities to assess the effects of a moderate geogenic Pb anomaly on collembolans and fungi in an urban vegetable garden soil. Results indicated that geogenic Pb indeed modified fungi communities and altered the functional structure of collembolan communities in garden soils. Although geogenic Pb presented low bioavailability, it affected soil fauna and vegetables similar to anthropogenic Pb.

Mots clés: urban soil; functional diversity; vegetable garden; functional trait; soil fauna; soil food web

Domaines: Sciences du Vivant [q-bio]

Sophie Joimel, Hervé Capiaux, Christophe Schwartz, Mickael Hedde, Thierry Lebeau, et al.. Effect of Geogenic Lead on Fungal and Collembolan Communities in Garden Topsoil. Pedosphere, 2018, 28 (2), pp.215-226. ⟨10.1016/S1002-0160(18)60022-0⟩. ⟨hal-01783981⟩