Isotopic tools for better management of aquatic environment and resources

dc.contributor.authorMazumder, Den_AU
dc.contributor.authorSaintilan, Nen_AU
dc.contributor.authorKobayashi, Ten_AU
dc.contributor.authorWen, Len_AU
dc.contributor.authorRogers, Ken_AU
dc.contributor.authorHollins, SEen_AU
dc.contributor.authorJohansen, MPen_AU
dc.contributor.authorWalsh, Cen_AU
dc.contributor.authorNarimbi, Jen_AU
dc.contributor.authorSammut, Jen_AU
dc.description.abstractWater is a vital resource that is under ever-increasing demand from population and industry growth, agricultural development, and environmental allocations that are crucial to sustain the natural ecosystems upon which we all rely. Analysis of naturally-occurring stable isotopes (d13C and d15N) have emerged as powerful techniques for addressing research and management-related questions in ecology and aquaculture. Our work on coastal wetlands has identified carbon and nutrient dynamics, the sequestration potential of saltmarsh and mangrove systems, and anthropogenic impacts on aquatic food chains. We compared trophic position and dietary sources in freshwater wetlands during a severe El Nino drought (2007) and following a subsequent series of wetter than average La Nina years (2013), and identified that food chains expand and contract with oscillations in climate phase in the absence of new sources of carbon. We applied isotopic tools in aquaculture, which is the fastest growing food-producing sector in Australia and around the world and accounts for one-third of global fish production. However, production and profitability from inland and coastal aquaculture are often low due to environmental constraints and the increasing cost of production. Our work to develop low-cost feeding strategies for PNG fish farmers suggests operational costs can be reduced by carefully utilising production inputs or changing the ingredients used in feed formulations. These results provide insights for further applications of stable isotopes in the aquatic ecosystem studies.en_AU
dc.description.sponsorshipAustralian Nuclear Science and Technology Organisation (ANSTO)en_AU
dc.identifier.citationMazumder, D., Saintilan, N., Kobayashi, T., Wen, L., Rogers, K., Hollins, S., Johansen, M., Walsh, C., Narimbi, J., & Sammut, J. (2015). Isotopic tools for better management of aquatic environment and resources. Paper presented to the 13th Australasian Environment Isotope Conference (AEIC), Sydney, 8-1th July 2015.en_AU
dc.identifier.conferenceenddate10 July 2015en_AU
dc.identifier.conferencename13th Australasian Environment Isotope Conference (AEIC)en_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate8 July 2015en_AU
dc.publisherAustralasian Environment Isotope Conferenceen_AU
dc.subjectStable isotopesen_AU
dc.subjectSouthern Oscillationen_AU
dc.titleIsotopic tools for better management of aquatic environment and resourcesen_AU
dc.typeConference Paperen_AU