title: Effects of the antifouling compound, Irgarol 1051, on a simulated estuarine salt marsh ecosystem.
abstract: Toxicity effects of the antifouling compound, Irgarol 1051, were examined using a simulated estuarine salt marsh ecosystem. The 35 day mesocosm exposure incorporated tidal flux and contained seawater, sediments, marsh grass, and estuarine biota. Irgarol (10.0 microg/l) caused a significant reduction in phytoplankton biomass and primary productivity. HPLC pigment analysis indicated significant effects of irgarol on both phytoplankton and periphyton community composition, with decreased concentrations of pigments representative of diatom species. There was also a significant decrease in dissolved oxygen levels in the 10.0 microg/l irgarol treatment. Growth of the hard shell clam was significantly reduced in the 1.0 and 10.0 microg/l irgarol treatments. The effects observed occurred at irgarol concentrations greater than those typically measured in the environment. Prolonged exposure, the accumulation of irgarol in sediments, plant, or animal tissues, and the interaction of irgarol with other chemicals in the environment; however, could increase risk.
authors.affiliation: National Oceanic and Atmospheric Administration, National Ocean Service, Charleston, SC, 29412, USA. Marie.DeLorenzo@noaa.gov
authors.forename: M E
authors.initials: ME
authors.lastname: DeLorenzo
authors.forename: P L
authors.initials: PL
authors.lastname: Pennington
authors.forename: K W
authors.initials: KW
authors.lastname: Chung
authors.forename: M C
authors.initials: MC
authors.lastname: Finnegan
authors.forename: M H
authors.initials: MH
authors.lastname: Fulton
mesh_terms: D000818:Animals; D018533:Biomass; D049872:Bivalvia / Q000187:drug effects* / Q000254:growth & development; D002851:Chromatography, High Pressure Liquid; D010100:Oxygen / Q000378:metabolism; D010575:Pesticides / Q000633:toxicity*; D010788:Photosynthesis / Q000187:drug effects*; D010839:Phytoplankton / Q000187:drug effects* / Q000254:growth & development; D006109:Poaceae / Q000187:drug effects*; D011157:Population Dynamics; D014227:Triazines / Q000633:toxicity*; D053833:Wetlands
chemical_list: D010575:Pesticides; D014227:Triazines; C103341:irgarol 1051; D010100:Oxygen