Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/4961
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dc.contributor.authorClaret, Cécileen
dc.contributor.authorBoulton, Andrewen
dc.date.accessioned2010-03-10T14:47:00Z-
dc.date.issued2009-
dc.identifier.citationHydrogeology Journal, 17(1), p. 151-160en
dc.identifier.issn1435-0157en
dc.identifier.issn1431-2174en
dc.identifier.urihttps://hdl.handle.net/1959.11/4961-
dc.description.abstractThe pervious lateral bars (parafluvial zone) and beds (hyporheic zone), where stream water and groundwater exchange, are dynamic sites of hydrological and biological retention. The significance of these biogeochemical 'hotspots' to stream and groundwater metabolism is largely controlled by filtration capacity, defined as the extent to which subsurface flowpaths and matrix hydraulic conductivity modify water characteristics. Where hydraulic conductivity is high, gradients in biogeochemistry and microbial activity along subsurface flowpaths were hypothesized to be less marked than where hydraulic conductivity is low. This hypothesis was tested in two riffles and gravel bars in an Australian subtropical stream. At one site, gradients in chemical and microbial variables along flowpaths were associated with reduced hydraulic conductivity, longer water residence time and reduced filtration capacity compared with the second site where filtration capacity was greater and longitudinal biogeochemical trends were dampened. These results imply that factors affecting the sediment matrix in this subtropical stream can alter filtration capacity, interstitial microbial activity and biogeochemical gradients along subsurface flowpaths. This hydroecological approach also indicates potential for a simple field technique to estimate filtration capacity and predict the prevailing hyporheic gradients in microbial activity and biogeochemical processing efficiency, with significant implications for stream ecosystem function.en
dc.languageenen
dc.publisherSpringeren
dc.relation.ispartofHydrogeology Journalen
dc.titleIntegrating hydraulic conductivity with biogeochemical gradients and microbial activity along river–groundwater exchange zones in a subtropical streamen
dc.typeJournal Articleen
dc.identifier.doi10.1007/s10040-008-0373-3en
dc.subject.keywordsEnvironmental Managementen
local.contributor.firstnameCécileen
local.contributor.firstnameAndrewen
local.subject.for2008050205 Environmental Managementen
local.subject.seo2008960999 Land and Water Management of Environments not elsewhere classifieden
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailcecile.claret@univ-cezanne.fren
local.profile.emailaboulton@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20091008-155636en
local.publisher.placeGermanyen
local.format.startpage151en
local.format.endpage160en
local.identifier.scopusid59549106091en
local.peerreviewedYesen
local.identifier.volume17en
local.identifier.issue1en
local.contributor.lastnameClareten
local.contributor.lastnameBoultonen
dc.identifier.staffune-id:aboultonen
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:5078en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleIntegrating hydraulic conductivity with biogeochemical gradients and microbial activity along river–groundwater exchange zones in a subtropical streamen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorClaret, Cécileen
local.search.authorBoulton, Andrewen
local.uneassociationUnknownen
local.identifier.wosid000262971600012en
local.year.published2009en
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