Carbon uptake in surface water food webs fed by paleogroundwater

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dc.contributor.authorMazumder, Den_AU
dc.contributor.authorSaintilan, Nen_AU
dc.contributor.authorHollins, SEen_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorKobayashi, Ten_AU
dc.contributor.authorWen, Len_AU
dc.date.accessioned2021-03-04T01:55:41Zen_AU
dc.date.available2021-03-04T01:55:41Zen_AU
dc.date.issued2019-04-05en_AU
dc.date.statistics2021-03-04en_AU
dc.description.abstractThe use of 14C to elucidate sources of carbon within freshwater aquatic ecosystems is challenging the assumption that modern autochthonous carbon dominates energy flows. We measured the uptake of old carbon through several trophic levels of a wetland fed by groundwater of the Great Artesian Basin, Australia, the largest artesian basin in the world. Stable isotopes (δ13C and δ15N) and radiocarbon (14C) were used to quantify food chain links and connection between groundwater and surface water food webs. Our results suggest that old groundwater was the dominant carbon source even at the highest trophic levels, with predatory fish returning apparent carbon ages of up to 11 ka. Stable isotope analysis (δ13C and δ15N) identified trophic links between fish, aquatic insects, and algae with smaller contributions from particulate organic matter to the food webs. As natural mound springs and associated wetlands are the only source of reliable water during dry periods over vast areas of the western Great Artesian Basin, the result has potential implications for the interpretation of archaeological artefacts associated with indigenous passage within the interior. ©2019. ANSTO, Macquarie University, Commonwealth of Australia.en_AU
dc.identifier.citationMazumder, D., Saintilan, N., Hollins, S., Meredith, K., Jacobsen, G., Kobayashi, T., & Wen, L. (2019). Carbon uptake in surface water food webs fed by palaeogroundwater. Journal of Geophysical Research: Biogeosciences, 124(5), 1171-1180. doi:10.1029/2018JG004925en_AU
dc.identifier.issn2169-8961en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleJournal of Geophysical Research: Biogeosciencesen_AU
dc.identifier.pagination1171-1180en_AU
dc.identifier.urihttps://doi.org/10.1029/2018JG004925en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10478en_AU
dc.identifier.volume124en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.subjectCarbon 14en_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectCarbonen_AU
dc.subjectArtesian basinsen_AU
dc.subjectAustraliaen_AU
dc.subjectStable isotopesen_AU
dc.subjectAquacultureen_AU
dc.subjectWetlandsen_AU
dc.subjectInsectsen_AU
dc.subjectAlgaeen_AU
dc.titleCarbon uptake in surface water food webs fed by paleogroundwateren_AU
dc.typeJournal Articleen_AU
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