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- W1978214608 abstract "AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 59:103-109 (2010) - DOI: https://doi.org/10.3354/ame01383 Microbes as food for sediment-ingesting detritivores: low-density particles confer a nutritional advantage J. C. Smoot1,2, R. H. Findlay1,3,* 1Department of Microbiology, Miami University, Oxford, Ohio 45056, USA 2Present address: C/e– Solutions, 925 San Tomas St., Davis, California 95618, USA 3Present address: Department of Biological Sciences, A-229 Bevil Building, PO Box 870206, University of Alabama, Tuscaloosa, Alabama 35487, USA *Corresponding author. Email: rfindlay@biology.as.ua.edu ABSTRACT: Detritivorous fish often selectively feed on organic-rich sediment particles, yet there is a paucity of data on the nutritional quality of different sediment fractions. A saturated cesium chloride solution was used to separate sediment from a freshwater reservoir into low- and high-density sediment fractions to mimic selective feeding on an organic-rich sediment fraction. Microbial biomass and community structure of sediment fractions were determined by phospholipid analysis. Carbon and nitrogen content and isotopic signatures were determined by elemental analysis gas source mass spectrometry. The low-density sediment fraction was enriched in organic carbon and 12C, had higher microbial biomass and relative abundance of microeukaryotes, and contributed less microbial carbon to total carbon when compared to the high-density sediment fraction. Stable isotope values were unable to resolve the source of organic matter present in the sediment density fractions but were able to provide a foundation to test models of gizzard shad nutrition in Acton Lake, Ohio, USA. Combined, biomimicry of selective feeding and microbiological and isotopic assessment of density-partitioned sediment indicate that deposit-feeding fishes gain a nutritionally superior food source by selectively feeding on low-density particles in freshwater habitats. KEY WORDS: Low density sediment · Microbial community structure · Stable isotopes · Phospholipid fatty acid analysis Full text in pdf format NextCite this article as: Smoot JC, Findlay RH (2010) Microbes as food for sediment-ingesting detritivores: low-density particles confer a nutritional advantage. Aquat Microb Ecol 59:103-109. https://doi.org/10.3354/ame01383 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 59, No. 2. Online publication date: March 31, 2010 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2010 Inter-Research." @default.
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