Use of Microbially Treated Olive Mill Wastewaters as Soil Organic Amendments; Their Short-Term Effects on the Soil Nematode Community

Managing olive mill wastewater (OMW) is a major environmental problem. We followed two methods for OMW bioremediation: one with the white-rot fungus Pleurotus ostreatus alone and plus microalga Chlorella vulgaris. To evaluate potential use of both final products as soil amendments, in pot experiment, we applied treated to cultivated Lactuca sativa, studied their short-term effects on nematode community terms trophic functional structure, metabolic footprint, genera composition, interaction networks. also non-treated simply water (control). The addition significantly reduced abundance all nematodes, network interactions was most fragmented least robust against future disturbance. effect group abundances similar but less pronounced when previously detoxified either by or its combination alga. In latter case, phytoparasites were suppressed bacterivorous nematodes not affected. However, cohesive formed that received fungal-treated OMW. None our applications changed none improved already degraded status food web—which attributed sandy texture soil—and affected growth lettuce plants, perhaps because short duration experiment (30 days). Thus, research will aim estimate long-term impact