Metabolism of mineral-sorbed organic matter depends upon microbial lifestyle in fluvial ecosystems

William Ross Hunter, Robert Niederdorfer, Anna Gernand, Bart Veuger, Judith Prommer, Maria Mooshammer, Wolfgang Wanek, Tom J Battin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In fluvial ecosystems mineral erosion, carbon (C) and nitrogen (N) fluxes are linked via organo-mineral complexation, where dissolved organic molecules bind to mineral surfaces. Biofilms and suspended aggregates represent major aquatic microbial lifestyles whose relative importance changes predictably through fluvial networks. We tested how organo-mineral sorption affects aquatic microbial metabolism, using organo-mineral particles containing a mix of 13C, 15N-labelled amino acids. We traced 13C and 15N retention within biofilm and suspended aggregate biomass and its mineralisation. Organo-mineral complexation restricted C and N retention within biofilms and aggregates and also their mineralisation. This reduced the efficiency with which biofilms mineralise C and N by 30 % and 6 %. By contrast, organo-minerals reduced the C and N mineralisation efficiency of suspended aggregates by 41 % and 93 %. Our findings show how organo-mineral complexation affects microbial C:N stoichiometry, potentially altering the biogeochemical fate of C and N within fluvial ecosystems.
LanguageEnglish
Pages1582-1588
Number of pages7
JournalGeophysical Research Letters
Volume43
Issue number4
Early online date19 Feb 2016
DOIs
Publication statusPublished - 28 Feb 2016

Fingerprint

ecosystems
metabolism
lifestyle
minerals
organic matter
biofilms
ecosystem
mineral
biofilm
complexation
mineralization
stoichiometry
biomass
sorption
erosion
amino acids
amino acid
nitrogen
carbon

Keywords

  • Amino Acid
  • Suspended Aggregate
  • Organo-mineral
  • Nitrogen
  • Carbon
  • Biofilm

Cite this

Hunter, W. R., Niederdorfer, R., Gernand, A., Veuger, B., Prommer, J., Mooshammer, M., ... Battin, T. J. (2016). Metabolism of mineral-sorbed organic matter depends upon microbial lifestyle in fluvial ecosystems. Geophysical Research Letters, 43(4), 1582-1588. https://doi.org/10.1002/2016GL067719
Hunter, William Ross ; Niederdorfer, Robert ; Gernand, Anna ; Veuger, Bart ; Prommer, Judith ; Mooshammer, Maria ; Wanek, Wolfgang ; Battin, Tom J. / Metabolism of mineral-sorbed organic matter depends upon microbial lifestyle in fluvial ecosystems. In: Geophysical Research Letters. 2016 ; Vol. 43, No. 4. pp. 1582-1588.
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Hunter, WR, Niederdorfer, R, Gernand, A, Veuger, B, Prommer, J, Mooshammer, M, Wanek, W & Battin, TJ 2016, 'Metabolism of mineral-sorbed organic matter depends upon microbial lifestyle in fluvial ecosystems', Geophysical Research Letters, vol. 43, no. 4, pp. 1582-1588. https://doi.org/10.1002/2016GL067719

Metabolism of mineral-sorbed organic matter depends upon microbial lifestyle in fluvial ecosystems. / Hunter, William Ross; Niederdorfer, Robert; Gernand, Anna; Veuger, Bart; Prommer, Judith; Mooshammer, Maria; Wanek, Wolfgang; Battin, Tom J.

In: Geophysical Research Letters, Vol. 43, No. 4, 28.02.2016, p. 1582-1588.

Research output: Contribution to journalArticle

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