title: Integrated assessment of mangrove sediments in the Camamu Bay (Bahia, Brazil).
abstract: Camamu Bay, an Environmentally Protected Area, may be affected by the pressures of tourism and oil exploration in the adjacent continental platform. The current quality of the mangrove sediments was evaluated by porewater bioassays using embryos of Crassostrea rhizophorae and by an analysis of benthic macrofauna and its relationships with organic compounds, trace metals and bioavailability. Porewater toxicity varied from low to moderate in the majority of the samples, and polychaetes dominated the benthos. The Grande Island sampling station (Station 1) presented more sandy sediments, differentiated macrobenthic assemblages and the highest metal concentrations in relation to other stations and guideline values, and it was the only station that indicated a possible bioavailability of metals. The origin of the metals (mainly barium) is most likely associated with the barite ore deposits located in the Grande and Pequena islands. These results may be useful for future assessment of the impact of oil exploration in the coastal region.
authors.affiliation: Instituto Federal de Educação, Ciência e Tecnologia Baiano, Brazil. jopaixao80@gmail.com
authors.forename: Joana F
authors.initials: JF
authors.lastname: Paixão
authors.forename: Olívia M C
authors.initials: OM
authors.lastname: de Oliveira
authors.forename: José M L
authors.initials: JM
authors.lastname: Dominguez
authors.forename: Edna dos Santos
authors.initials: Edos S
authors.lastname: Almeida
authors.forename: Gilson Correia
authors.initials: GC
authors.lastname: Carvalho
authors.forename: Wagner F
authors.initials: WF
authors.lastname: Magalhães
mesh_terms: D000473:Alkanes / Q000032:analysis / Q000633:toxicity; D000818:Animals; D044822:Biodiversity; D001938:Brazil; D049896:Crassostrea / Q000187:drug effects* / Q000196:embryology; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D007814:Larva / Q000187:drug effects; D019216:Metals, Heavy / Q000032:analysis / Q000633:toxicity; D015999:Multivariate Analysis; D010578:Petroleum / Q000032:analysis / Q000633:toxicity; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity; D043982:Rhizophoraceae; D018570:Risk Assessment; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D000473:Alkanes; D019216:Metals, Heavy; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical