title: Dispersal networks for enhancing bacterial degradation in heterogeneous environments.
abstract: Successful biodegradation of organic soil pollutants depends on their bioavailability to catabolically active microorganisms. In particular, environmental heterogeneities often limit bacterial access to pollutants. Experimental and modelling studies revealed that fungal networks can facilitate bacterial dispersal and may thereby improve pollutant bioavailability. Here, we investigate the influence of such bacterial dispersal networks on biodegradation performance under spatially heterogeneous abiotic conditions using a process-based simulation model. To match typical situations in polluted soils, two types of abiotic conditions are studied: heterogeneous bacterial dispersal conditions and heterogeneous initial resource distributions. The model predicts that networks facilitating bacterial dispersal can enhance biodegradation performance for a wide range of these conditions. Additionally, the time horizon over which this performance is assessed and the network's spatial configuration are key factors determining the degree of biodegradation improvement. Our results support the idea of stimulating the establishment of fungal mycelia for enhanced bioremediation of polluted soils.
authors.affiliation: Department of Ecological Modelling, UFZ - Helmholtz Centre for Environmental Research, Permoserstr 15, 04318 Leipzig, Germany. thomas.banitz@ufz.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Banitz
authors.forename: Lukas Y
authors.initials: LY
authors.lastname: Wick
authors.forename: Ingo
authors.initials: I
authors.lastname: Fetzer
authors.forename: Karin
authors.initials: K
authors.lastname: Frank
authors.forename: Hauke
authors.initials: H
authors.lastname: Harms
authors.forename: Karin
authors.initials: K
authors.lastname: Johst
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D059013:Microbial Consortia; D056265:Microbial Interactions; D008954:Models, Biological; D008956:Models, Chemical; D025282:Mycelium / Q000378:metabolism; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants