title: Evaluation of steelmaking slag as basal media for coastal primary producers.
abstract: The use of granular steelmaking slag as a substitute for natural sand in the construction of tidal flats was investigated. Using an intertidal flat simulator, we evaluated dephosphorization slag mixed with 8% by dry weight of dredged sediment (DPS+DS) as a basal medium for the growth of benthic macro- and microalgae in comparison with silica sand mixed with 8% dredged sediment (SS+DS). Species compositions of macro- and microalgae were distinctly different between DPS+DS and SS+DS. The mean dry weight of macroalgae on DPS+DS was three orders of magnitude higher than that on SS+DS. Sediment shear strength and pH were higher in DPS+DS than in SS+DS or in the sediment of natural tidal flats. These results suggest that DPS contributes to changing the sediment environment, thereby changing the algal composition compared to the composition on natural tidal flats.
authors.affiliation: Environmental Research and Management Center, Hiroshima University, 1-5-3 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8513, Japan. Electronic address: akiyama-y92y2@mlit.go.jp.
authors.forename: Yoshihiro B
authors.initials: YB
authors.lastname: Akiyama
authors.affiliation: Department of Material Science and Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8527, Japan.
authors.forename: Hitomi
authors.initials: H
authors.lastname: Yano
authors.affiliation: Department of Environmental Dynamics and Management, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8528, Japan.
authors.forename: Kyohei
authors.initials: K
authors.lastname: Koba
authors.affiliation: Department of Material Science and Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8527, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Katayama
authors.affiliation: Research Center for Inland Seas, Kobe University, 2746, Iwaya, Awaji City, Hyogo 656-2401, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Asaoka
authors.affiliation: Environmental Research and Management Center, Hiroshima University, 1-5-3 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8513, Japan.
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Okuda
authors.affiliation: Department of Material Science and Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8527, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nakai
authors.affiliation: Department of Environmental Dynamics and Management, Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8528, Japan.
authors.forename: Tamiji
authors.initials: T
authors.lastname: Yamamoto
authors.affiliation: Environmental Research and Management Center, Hiroshima University, 1-5-3 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8513, Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Nishijima
mesh_terms: D044822:Biodiversity; D017753:Ecosystem; D004867:Equipment Design; D019015:Geologic Sediments / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008669:Metallurgy; D058086:Microalgae; D012624:Seaweed; D012822:Silicon Dioxide; D013232:Steel; D014866:Waste Products
chemical_list: D014866:Waste Products; D013232:Steel; D012822:Silicon Dioxide
keywords: Artificial intertidal flat; Dephosphorization slag; Dredged sediment; Macroalgae; Microalgae; Substrate stability