title: Monitoring pesticides in the Great Barrier Reef.
abstract: Pesticide runoff from agriculture poses a threat to water quality in the world heritage listed Great Barrier Reef (GBR) and sensitive monitoring tools are needed to detect these pollutants. This study investigated the utility of passive samplers in this role through deployment during a wet and dry season at river mouths, two near-shore regions and an offshore region. The nearshore marine environment was shown to be contaminated with pesticides in both the dry and wet seasons (average water concentrations of 1.3-3.8 ng L(-1) and 2.2-6.4 ng L(-1), respectively), while no pesticides were detected further offshore. Continuous monitoring of two rivers over 13 months showed waters flowing to the GBR were contaminated with herbicides (diuron, atrazine, hexazinone) year round, with highest average concentrations present during summer (350 ng L(-1)). The use of passive samplers has enabled identification of insecticides in GBR waters which have not been reported in the literature previously.
authors.affiliation: National Research Centre for Environmental Toxicology (EnTox), University of Queensland, 39 Kessels Rd., Coopers Plains, 4108 Qld, Australia. mshaw@entox.uq.edu.au
authors.forename: Melanie
authors.initials: M
authors.lastname: Shaw
authors.forename: Miles J
authors.initials: MJ
authors.lastname: Furnas
authors.forename: Katharina
authors.initials: K
authors.lastname: Fabricius
authors.forename: David
authors.initials: D
authors.lastname: Haynes
authors.forename: Steve
authors.initials: S
authors.lastname: Carter
authors.forename: Geoff
authors.initials: G
authors.lastname: Eaglesham
authors.forename: Jochen F
authors.initials: JF
authors.lastname: Mueller
mesh_terms: D000383:Agriculture; D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D001315:Australia; D004129:Dimethylpolysiloxanes / Q000032:analysis / Q000633:toxicity; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D005843:Geography; D008567:Membranes, Artificial; D010539:Permeability; D010575:Pesticides / Q000032:analysis* / Q000633:toxicity; D011786:Quality Control; D045483:Rivers / Q000737:chemistry; D012621:Seasons; D012623:Seawater / Q000032:analysis* / Q000737:chemistry*; D013997:Time Factors; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity; D014881:Water Supply / Q000032:analysis* / Q000592:standards
chemical_list: D004129:Dimethylpolysiloxanes; D008567:Membranes, Artificial; D010575:Pesticides; D014874:Water Pollutants, Chemical