000215842 001__ 215842
000215842 005__ 20180913063546.0
000215842 0247_ $$2doi$$a10.1002/2016GL067719
000215842 022__ $$a0094-8276
000215842 02470 $$2ISI$$a000373109000024
000215842 037__ $$aARTICLE
000215842 245__ $$aMetabolism of mineral-sorbed organic matter depends upon microbial lifestyle in fluvial ecosystems
000215842 260__ $$aWashington$$bAmerican Geophysical Union$$c2016
000215842 269__ $$a2016
000215842 300__ $$a7
000215842 336__ $$aJournal Articles
000215842 520__ $$aIn 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.
000215842 6531_ $$aAmino Acid
000215842 6531_ $$aBiofilm
000215842 6531_ $$aCarbon
000215842 6531_ $$aNitrogen
000215842 6531_ $$aOrgano-mineral
000215842 6531_ $$aSuspended Aggregate
000215842 700__ $$aHunter, William Ross
000215842 700__ $$aNiederdorfer, Robert
000215842 700__ $$aGernand, Anna
000215842 700__ $$aVeuger, Bart
000215842 700__ $$aPrommer, Judith
000215842 700__ $$aMooshammer, Maria
000215842 700__ $$aWanek, Wolfgang
000215842 700__ $$0248756$$aBattin, Tom J$$g253102
000215842 773__ $$j43$$q1582–1588$$tGeophysical Research Letters
000215842 909C0 $$0252520$$pSBER$$xU13006
000215842 909CO $$ooai:infoscience.tind.io:215842$$particle$$pENAC
000215842 917Z8 $$x221818
000215842 917Z8 $$x221818
000215842 937__ $$aEPFL-ARTICLE-215842
000215842 973__ $$aOTHER$$rREVIEWED$$sPUBLISHED
000215842 980__ $$aARTICLE