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dc.contributor.authorNizzoli, Daniele
dc.contributor.authorBartoli, Marco
dc.contributor.authorCooper, Martin
dc.contributor.authorWelsh, David T
dc.contributor.authorUnderwood, Graham JC
dc.contributor.authorViaroli, Pierluigi
dc.date.accessioned2017-05-03T14:31:55Z
dc.date.available2017-05-03T14:31:55Z
dc.date.issued2007
dc.date.modified2009-08-26T07:05:52Z
dc.identifier.issn0272-7714
dc.identifier.doi10.1016/j.ecss.2007.03.035
dc.identifier.urihttp://hdl.handle.net/10072/17277
dc.description.abstract"In this work, bioturbation effects by the polychaete Nereis spp. on oxygen demand, denitrification and solute fluxes in four European coastal areas (Goro lagoon in Italy, Tagus estuary in Portugal, Colne estuary in England and Tj䲮栢ay in Sweden) are compared. The studied areas are very heterogeneous with respect to tidal regimes, primary producers communities, sediment composition and organic matter content and nutrient concentrations in the water column. At each site, with the same methodological approach, undisturbed sediment cores and cores with different numbers of polychaetes added were incubated in the dark. Oxygen, inorganic nutrients (NH4+, NO3-, Dissolved Reactive Silica-SiO2 and Soluble Reactive Phosphorous-SRP) fluxes and coupled-uncoupled denitrification rates were quantified on the same set of cores. Nereis bioturbation had a considerable effect on biogeochemical processes and, at all sites, resulted in an immediate stimulation (from 1.5- to 4-fold higher) of oxygen and ammonium fluxes between the sediment and the water column; on the contrary bioturbation had site specific effects on reactive silica and phosphorus fluxes. Bioturbation also stimulated denitrification of water column nitrate (Dw, from 1.3 to 3 times higher than in control sediments); this process removed a major fraction (>50%) of the nitrogen lost through denitrification. Overall, the strong relationship between benthic macrofauna activity and sediment biogeochemistry is confirmed by this study. Comparison of the relative stimulation of processes in different geographical areas reveals that the degree by which processes and fluxes (intensity and direction) are affected are site specific and influenced by initial macrofauna densities and sediment and water chemistry."
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_AU
dc.publisherElsevier Ltd.
dc.publisher.placeUnited Kingdom
dc.publisher.urihttp://www.elsevier.com/locate/ecss
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom125
dc.relation.ispartofpageto134
dc.relation.ispartofjournalEstuarine, Coastal and Shelf Science
dc.relation.ispartofvolume75
dc.rights.retentionY
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchcode04
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode06
dc.titleImplications for oxygen, nutrient fluxes and denitrification rates during the early stage of sediment colonisation by the polychaete Nereis spp. in four estuaries
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2007
gro.hasfulltextNo Full Text
gro.griffith.authorWelsh, David T.


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