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dc.contributor.authorRayner, Thomas S
dc.contributor.authorPusey, Bradley J
dc.contributor.authorPearson, Richard G
dc.contributor.authorGodfrey, Paul C
dc.date.accessioned2017-05-03T11:47:11Z
dc.date.available2017-05-03T11:47:11Z
dc.date.issued2010
dc.date.modified2011-03-07T08:52:07Z
dc.identifier.issn1323-1650
dc.identifier.doi10.1071/MF09202
dc.identifier.urihttp://hdl.handle.net/10072/36826
dc.description.abstractIn Australia's Wet Tropics rivers, perennial base flows punctuated by wet season floods drive instream responses across a range of spatial and temporal scales. We combined gut-content and stable-isotope analyses to produce preliminary webs depicting trophic links between fish, their main prey items and basal productivity sources. We then used these webs to test the applicability of general food web principles developed in other tropical systems. Although a range of sources appeared to underpin fish productivity, a large portion of total energy transfer occurred through a subset of trophic links. Variability in food web structure was negatively correlated with spatial scale, being seasonally stable at river reaches and variable at smaller scales. Wet Tropics rivers are similar to those in other tropical areas, but exhibit some unique characteristics. Their high degree of channel incision improves longitudinal connectivity, thereby allowing fish to move between mesohabitats and target their preferred prey items, rather than shifting their diet as resources fluctuate. However, this also inhibits lateral connectivity and limits terrestrial energy inputs from beyond the littoral zone.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherCSIRO Publishing
dc.publisher.placeAustralia
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom909
dc.relation.ispartofpageto917
dc.relation.ispartofissue8
dc.relation.ispartofjournalMarine and Freshwater Research
dc.relation.ispartofvolume61
dc.rights.retentionY
dc.subject.fieldofresearchEcology not elsewhere classified
dc.subject.fieldofresearchcode310399
dc.titleFood web dynamics in an Australian Wet Tropics river
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2010
gro.hasfulltextNo Full Text
gro.griffith.authorPusey, Bradley J.
gro.griffith.authorGodfrey, Paul


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