title: Macroinvertebrate responses to nickel in multisystem exposures.
abstract: Metals introduced to sediments undergo a variety of complexation and partitioning changes that affect metal bioavailability. Using simultaneously extracted metal (SEM)/acid volatile sulfide (AVS) and organic carbon (f(OC)) models, the authors examined nickel (Ni) toxicity and bioavailability in 2 field studies (using streamside mesocosm and in situ colonization) and 1 laboratory study. The streamside mesocosm experiments indicated that benthic communities (Ephemeroptera, abundance, and taxa richness) responded negatively to increasing SEM(Ni) /AVS and (SEM(Ni) -AVS)/f(OC) models. In the in situ colonization study, taxa richness, abundance, and Ephemeroptera, Plecoptera, and Trichoptera (EPT) taxa decreased with increasing SEM(Ni) and SEM(Ni)/AVS values. Nickel-spiked sediments were tested in the laboratory with indigenous field-collected mayflies (Anthopotamus verticis, Isonychia spp., and Stenonema spp) and a beetle (Psephenus herricki), and with laboratory-cultured Hyalella azteca and Chironomus dilutus. The amphipod H. azteca was the most sensitive organism tested, and the mayflies Anthopotamus verticis and Stenonema spp. were the most sensitive indigenous organisms to Ni-spiked sediments. These studies help discern which factors are important in determining Ni toxicity and bioavailability at the individual, population, and community levels.
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, Ohio, USA.
authors.forename: Kevin W
authors.initials: KW
authors.lastname: Custer
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, Ohio, USA.
authors.forename: Jon P
authors.initials: JP
authors.lastname: Kochersberger
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, Ohio, USA.
authors.forename: Padrick D
authors.initials: PD
authors.lastname: Anderson
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, Ohio, USA.
authors.forename: Kyle J
authors.initials: KJ
authors.lastname: Fetters
authors.affiliation: Department of Earth and Environmental Sciences, Wright State University, Dayton, Ohio, USA.
authors.forename: Steven
authors.initials: S
authors.lastname: Hummel
authors.affiliation: School of Natural Resources and Environment, University of Michigan, Ann Arbor, Michigan, USA.
authors.forename: G Allen
authors.initials: GA
authors.lastname: Burton
mesh_terms: D033304:Amphipoda; D000818:Animals; D002244:Carbon / Q000032:analysis; D001517:Coleoptera; D004175:Diptera; D004784:Environmental Monitoring; D005618:Fresh Water / Q000032:analysis; D019015:Geologic Sediments; D000075322:Heavy Metal Poisoning; D007448:Invertebrates / Q000187:drug effects*; D009532:Nickel / Q000032:analysis / Q000633:toxicity*; D011041:Poisoning; D013440:Sulfides / Q000737:chemistry / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D013440:Sulfides; D014874:Water Pollutants, Chemical; D002244:Carbon; D009532:Nickel
keywords: Benthic macroinvertebrate; Mesocosm; Metal bioavailability; Nickel; Sediment toxicity