Effects of olive mill wastewater discharge on benthic biota in Mediterranean streams
| Autor: | Leonidas Vardakas, E. Anastasopoulou, Maria Koutsodimou, Isabel Muñoz, Sofia Laschou, Núria De Castro-Català, Argyro Andriopoulou, Sergi Sabater, Evangelia Smeti, Nikolaos Skoulikidis, Ioannis Karaouzas, Eleni Kalogianni, Elisabet Tornés |
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| Rok vydání: | 2019 |
| Předmět: |
River ecosystem
010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis ved/biology.organism_classification_rank.species Wastewater 010501 environmental sciences Toxicology Waste Disposal Fluid 01 natural sciences Rivers Olea Ecosystem 0105 earth and related environmental sciences Diatoms Total organic carbon Chironomus riparius Phenol biology ved/biology fungi Sediment Biota General Medicine biology.organism_classification Pollution Diatom Benthic zone Environmental chemistry Environmental science Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Pollution. 254:113057 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2019.113057 |
| Popis: | Olive mill wastewaters (OMW) discharging in river ecosystems cause significant adverse effects on their water chemistry and biological communities. We here examined the effects of OMW loads in four streams of a Mediterranean basin characterized by changing flow. The diatom and macroinvertebrate community structures were compared between upstream (control) and downstream (impacted) sites receiving OMW discharge. We also tested if effects occurred at the organism level, i.e. the occurrence of deformities in diatom valves, and the sediment toxicity on the midge Chironomus riparius. We evaluated these effects through a two-year analysis, at various levels of chemical pollution and dilution capacity. The impacted sites had high phenol concentrations and organic carbon loads during and after olive mill (OM) operation, and were characterized by higher abundances of pollution-tolerant diatom and macroinvertebrate taxa. Diatom valve deformities occurred more frequently at the impacted sites. The development of C. riparius was affected by phenolic compounds and organic carbon concentrations in the sediments. The similarity in the diatom and macroinvertebrate assemblages between control and impacted sites decreased at lower flows. Diatoms were more sensitive in detecting deterioration in the biological status of OMW receiving waterways than macroinvertebrates. Our results indicate that the negative effects of OMW extended to the whole benthic community, at both assemblage and organism level. |
| Databáze: | OpenAIRE |
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