title: Potential role of sulfide and ammonia as confounding factors in elutriate toxicity bioassays with early life stages of sea urchins and bivalves.
abstract: This work reports some considerations on the possible contribution of sulfide and ammonia to the toxicity of elutriate samples of sediments from the Venice lagoon, tested with a battery of bioassays using early life stages of the sea urchin Paracentrotus lividus and the oyster Crassostrea gigas. A comparison of ammonia or sulfide concentration in the test matrix, matrix toxicity, and the sensitivity limit of bioassays for ammonia or sulfide were used in evaluating toxicity data. Results highlighted that sperm cell and embryo toxicity of elutriates were not affected by sulfides. Neither was any direct relationship shown between elutriate toxicity and ammonia concentration. Most elutriates had ammonia concentrations below the sensitivity limit of acute test methods, while the more sensitive subchronic toxicity tests were affected by ammonia interference in some samples.
authors.affiliation: Department of Environmental Sciences, University of Venice, Campo della celestia 2737/b, I-30122 Venice, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Losso
authors.forename: Alessandra Arizzi
authors.initials: AA
authors.lastname: Novelli
authors.forename: Marco
authors.initials: M
authors.lastname: Picone
authors.forename: Davide
authors.initials: D
authors.lastname: Marchetto
authors.forename: Claudio
authors.initials: C
authors.lastname: Pantani
authors.forename: Pier Francesco
authors.initials: PF
authors.lastname: Ghetti
authors.forename: Annamaria Volpi
authors.initials: AV
authors.lastname: Ghirardini
mesh_terms: D000641:Ammonia / Q000032:analysis*; D000818:Animals; D003300:Copper / Q000633:toxicity; D004625:Embryo, Nonmammalian / Q000187:drug effects; D004784:Environmental Monitoring; D005260:Female; D005306:Fertilization / Q000187:drug effects; D019015:Geologic Sediments / Q000737:chemistry; D007558:Italy; D008297:Male; D019055:No-Observed-Adverse-Effect Level; D010125:Ostreidae / Q000502:physiology*; D012617:Sea Urchins / Q000502:physiology*; D013094:Spermatozoa / Q000187:drug effects / Q000502:physiology; D013440:Sulfides / Q000032:analysis*; D018675:Toxicity Tests / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D013440:Sulfides; D014874:Water Pollutants, Chemical; D000641:Ammonia; D003300:Copper