The fate of freshly spiked and aged C-14-naphthalene associated residues as investigated in the presence and absence of ectomycorrhizal Scots pine seedlings and enchytraeid worms, in a factorial experimental design. Microcosms were used which enabled the C-14-labelled naphthalene associated residues to be quantified, including plant lipids which acted as an additional naphthalene sink within the microcosms. The presence of plant roots altered the availability of the C-14-naphthalene and associated residues to degrading microbes. Mineralisation and volatilisation of C-14 naphthalene in freshly spiked soil were lower in the presence of Scots pine. Conversely, in soil aged for 180 d, Scots pine increased mineralisation, and bioavailability of naphthalene. Root-mediated processes, microbial activity and enchytraeids interact with desorption, bioavailability and mineralisation of naphthalene. (c) 2006 Elsevier Ltd. All rights reserved.
- Scots pine
- polycyclic aromatic-hydrocarbons
- coniferous forest soil
- ectomycorrhizal fungi