Impoundment constraint of fish niche diversity in a temperate Australian river

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dc.contributor.authorMazumder, Den_AU
dc.contributor.authorWilliams, RJen_AU
dc.contributor.authorWals, Cen_AU
dc.contributor.authorWen, Len_AU
dc.contributor.authorSaintilan, Nen_AU
dc.date.accessioned2016-06-07T05:43:45Zen_AU
dc.date.available2016-06-07T05:43:45Zen_AU
dc.date.issued2016-02-02en_AU
dc.date.statistics2016-06-07en_AU
dc.description.abstractDams constitute a major threat to aquatic ecosystems world-wide by modifying habitat and impairing opportunities for many freshwater fish. Subsequently, there can be a loss in fish diversity and change in the species distributions and population structure that ultimately contribute to changes in trophic structure and ecosystem function. In this study, stable isotope analysis (SIA) was used to compare trophic interaction and niche space of five fish species residing upstream and downstream of a significant barrier (Tallowa Dam) on the Shoalhaven River in south-eastern Australia. Significant reduction in niche space was found among predator/prey species residing in upstream habitat, implying limited dietary opportunity. Mixing calculations for Macquaria novemaculeata confirmed ontogenetic differences upstream and downstream of the dam. Causal mechanisms for this variability in trophic structure include habitat modification and/or discontinuity in river connectivity. SIA provides a useful tool for demonstrating the effect of barriers and/or impoundments on aquatic ecosystems, and for developing future monitoring programmes to evaluate restoration strategies.en_AU
dc.identifier.citationMazumder, D., Williams, R. J., Wen, L, Saintilan, N., & Walsh, C. T. (2016). Impoundment constraint of fish niche diversity in a temperate Australian river. Hydrobiologia, 771(1), 195-206. doi: 10.1007/s10750-015-2630-5en_AU
dc.identifier.govdoc6648en_AU
dc.identifier.issn0018-8158en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleHydrobiologiaen_AU
dc.identifier.pagination195-206en_AU
dc.identifier.urihttp://www.doi.org/10.1007/s10750-015-2630-5en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6925en_AU
dc.identifier.volume771en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectLimiting valuesen_AU
dc.subjectDiversificationen_AU
dc.subjectAustraliaen_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectFishesen_AU
dc.subjectRiversen_AU
dc.titleImpoundment constraint of fish niche diversity in a temperate Australian riveren_AU
dc.typeJournal Articleen_AU
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