Denitrification measurements of sediments using cores and chambers

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Show simple item record Macreadie, Peter en_US Ross, D. en_US Longmore, Andrew en_US Keough, Michael en_US
dc.contributor.editor en_US 2012-02-02T06:49:10Z 2012-02-02T06:49:10Z 2006 en_US
dc.identifier 2010001969 en_US
dc.identifier.citation Macreadie Peter et al. 2006, 'Denitrification measurements of sediments using cores and chambers', Inter Research, vol. 326, pp. 49-59. en_US
dc.identifier.issn 0171-8630 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Denitrification is commonly measured using in situ benthic chambers or laboratory incubations of sediment cores. These techniques are similar in principle but differ considerably in cost and practicality. Despite widespread use of both techniques, it is uncertain whether they give comparable results. We compared cores and chambers for measuring fluxes (dissolved oxygen [DO], N2, NH4+, NO3? and NO2?) and denitrification efficiency at 2 sites in Port Phillip Bay, Victoria, Australia. Overall, denitrification efficiency was not significantly different between cores and chambers, but fluxes of DO, NO3? and NO2? differed. Chambers demonstrated higher levels of oxygen consumption and net fluxes of NO3? and NO2? out of the sediment, suggesting that denitrification and nitrification were closely coupled. In contrast, there was a greater relative importance for uncoupled denitrification in cores as indicated by reduced oxygen consumption and net fluxes of NO3? into the sediment. We conclude that cores and chambers give different flux results and therefore are not comparable techniques for measuring denitrification. To ascertain the cause of this, we tested the hypothesis that cores failed to adequately incorporate the impacts of macrofauna on fluxes, due to the small size of cores relative to chambers en_US
dc.language en_US
dc.publisher Inter Research en_US
dc.relation.isbasedon en_US
dc.title Denitrification measurements of sediments using cores and chambers en_US
dc.parent Marine Ecology Progress Series en_US
dc.journal.volume 326 en_US
dc.journal.number en_US
dc.publocation Germany en_US
dc.identifier.startpage 49 en_US
dc.identifier.endpage 59 en_US SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 060200 en_US
dc.personcode 108249 en_US
dc.personcode 0000066792 en_US
dc.personcode 0000066793 en_US
dc.personcode 0000066770 en_US
dc.percentage 100 en_US Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Denitrification ? Benthic chambers ? Sediment cores ? Nutrient flux ? Macrofauna ? Disturbance ? Port Phillip Bay en_US
dc.staffid en_US

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