Longitudinal trends in river functioning: Patterns of nitrogen and carbon processing in three Australian Rivers

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dc.contributor.author Hadwen, Wade en_US
dc.contributor.author Fellows, Christine en_US
dc.contributor.author Westhorpe, Douglas en_US
dc.contributor.author Rees, Gavin en_US
dc.contributor.author Mitrovic, Simon en_US
dc.contributor.author Taylor, Brett en_US
dc.contributor.author Baldwin, Darren en_US
dc.contributor.author Silvester, Ewen en_US
dc.contributor.author Croome, Roger en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T06:19:33Z
dc.date.available 2012-02-02T06:19:33Z
dc.date.issued 2010 en_US
dc.identifier 2010001790 en_US
dc.identifier.citation Hadwen Wade et al. 2010, 'Longitudinal trends in river functioning: Patterns of nitrogen and carbon processing in three Australian Rivers', John Wiley & Sons, vol. 26, no. 9, pp. 1129-1152. en_US
dc.identifier.issn 1535-1459 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/14748
dc.description.abstract Understanding longitudinal trends in the processing of carbon in rivers represents a much conceptualised, but infrequently tested, issue in aquatic ecology. In this study, we conducted concurrent longitudinal examinations of three very different rivers in eastern Australia to determine whether general principles in river functioning exist across broad geographic and hydrologic scales. Specifically, we examined trends in ambient basic water chemistry, nutrient concentrations, dissolved organic carbon (DOC), extracellular enzymes and food web structure and functioning and conducted bioassays to examine the degree to which DOC and nutrients limit heterotrophic bacterial respiration. These parameters revealed striking similarities across all sites. For metazoan communities, stable isotope analysis showed that algal carbon was the dominant basal resource utilised by consumers in all three rivers, suggesting that in-stream primary producers strongly underpin trophic pathways regardless of the position within a catchment or catchment condition. Analyses of extracellular enzymes revealed that microbial communities are actively utilising DOC at all sites. In fact, heterotrophic microbial respiration was strongly limited by DOC at all sites, with nutrient additions resulting in only relatively minor increases in respiration. en_US
dc.language en_US
dc.publisher John Wiley & Sons en_US
dc.relation.isbasedon http://dx.doi.org/10.1002/rra.1321 en_US
dc.title Longitudinal trends in river functioning: Patterns of nitrogen and carbon processing in three Australian Rivers en_US
dc.parent River Research and Applications en_US
dc.journal.volume 26 en_US
dc.journal.number 9 en_US
dc.publocation UK en_US
dc.identifier.startpage 1129 en_US
dc.identifier.endpage 1152 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 060200 en_US
dc.personcode 0000066633 en_US
dc.personcode 0000066634 en_US
dc.personcode 87144422 en_US
dc.personcode 0000066635 en_US
dc.personcode 944240 en_US
dc.personcode 0000066636 en_US
dc.personcode 0000066637 en_US
dc.personcode 0000066638 en_US
dc.personcode 0000066639 en_US
dc.percentage 100 en_US
dc.classification.name Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords * microbial respiration; * extracellular enzymes; * food webs; * experimental bioassays en_US

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