La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Sulfate reduction and porewater chemistry in a gulf coast Juncus roemerianus (Needlerush) marsh
Auteurs :	G. A. Miley, Auteur ; R. P. Kiene, Auteur
Type de document :	Article
Dans :	Estuaries (27(3) JUN 2004)
Article en page(s) :	472-481
Résumé :	Sulfate reduction rates were measured over the course of a year in the sediments of a Juncus roemerianus marsh located in coastal Alabama. Sulfate reduction rates were typically highest in the surface 0-2 cm and at depths corresponding to peak belowground biomass of the plants. The highest volume-based sulfate reduction rate measured was 1,350 mumol liter-sediment(-1) d(-1) in September 1995. Areal sulfate reduction rates (integrated to 20 cm depth) were strongly correlated to sediment temperature and varied seasonally from 15.2 mmol SO(4)(2-) m(-2) d(-1) in January 1995 to 117 mmol SO(4)(2-) m(-2) d(-1) in late August 1995. Despite high sulfate reduction rates porewater dissolved sulfide concentrations were low (

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