Long-term biological monitoring of environmental quality around a solid waste landfill assessed with lichens

The diversity of epiphytic lichens and the accumulation of selected trace elements in the lichen Flavoparmelia caperata L. (Hale) were used as indicators of pollution around a landfill in central Italy along 14 years of waste management. Lichens revealed an increased deposition for some elements (i.e., Cd, Cr, Fe and Ni) and a decrease of the lichen diversity at sites facing the landfill after an enlargement of the dumping area. However, the results allowed to exclude a significant increase in heavy metal depositions in the surrounding area and suggested that successful waste management may be associated with environmental quality. It is concluded that lichen monitoring might provide essential information to enhance the implementation of ecological impact assessment, supporting industrial regulatory procedures, also when waste management is concerned. - Highlights: ► Lichens were used as bioindicators at a landfill along 14 years of waste management. ► Metal deposition and low lichen diversity were found only close to the landfill. ► Lichen monitoring can assist in waste management regulatory decision. - The results of lichen monitoring can contribute to decision making process concerning waste management.