title: Surface and ground waters characterization in Tuscany (Italy) by using algal bioassay and pesticide determinations: comparative evaluation of the results and hazard assessment of the pesticides impact on primary productivity.
abstract: Algal bioassays and pesticide analysis were joined in Tuscany regional monitoring of surface and ground waters. Results were compared. Waters affected algal growth in any of the following ways: stimulation, inhibition, stimulation at low concentrations and inhibition at higher concentrations. Most of ground waters inhibited algal growth whereas only a little percentage were contaminated with pesticide. Most of surface waters stimulated algal growth and a higher percentage were contaminated with pesticides. In waters with inhibitory effect toxicological parameters (EC50, EC25, EC10 and NOEC) were measured and compared; EC25 values were very close to NOEC values. Hazard to aquatic primary productivity for each pesticide found during chemical monitoring was evaluated; for this aim the margin of safety (MOS) was calculated by using algal toxicity and the pesticide concentration measured.
authors.affiliation: ARPAT-Agenzia Regionale di Protezione Ambientale della Toscana, Servizio Sub-Provinciale di Piombino, via Adige 12, Piombino (Livorno) 57025, Italia. g.sbrilli@arpat.toscana.it
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Sbrilli
authors.forename: Benedetta
authors.initials: B
authors.lastname: Bimbi
authors.forename: Fabio
authors.initials: F
authors.lastname: Cioni
authors.forename: Lucia
authors.initials: L
authors.lastname: Pagliai
authors.forename: Federico
authors.initials: F
authors.lastname: Luchi
authors.forename: Eudes
authors.initials: E
authors.lastname: Lanciotti
mesh_terms: D000460:Chlorophyta / Q000187:drug effects* / Q000254:growth & development; D004784:Environmental Monitoring; D005618:Fresh Water / Q000032:analysis*; D006256:Hazardous Waste / Q000517:prevention & control*; D007558:Italy; D010575:Pesticides / Q000032:analysis / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D006256:Hazardous Waste; D010575:Pesticides; D014874:Water Pollutants, Chemical