27-Potential sources of microbial colonizers in an

27-Potential sources of microbial colonizers in an initial soil ecosystem after retreat of an alpine glacier.LETTERSoilmicrobialcommunitiesdrivetheresistanceofecosystemmultifunctionalitytoglobalchangeindrylandsacrosstheglobeManuelDelgado-Baquerizo,1,2*DavidJ.Eldridge,3VictoriaOchoa,2BeatrizGozalo,2BrajeshK.Singh4,5andFernandoT.Maestre2AbstractTherelationshipbetweensoilmicrobialcommunitiesandtheresistanceofmultipleecosystemfunctionslinkedtoC,NandPcycling(multifunctionalityresistance)toglobalchangehasneverbeenassessedgloballyinnaturalecosystems.Wecollectedsoilsfrom59drylandecosystemsworldwidetoinvestigatetheimportanceofmicrobialcommunitiesaspredictorofmultifunctional-ityresistancetoclimatechangeandnitrogenfertilisation.Multifunctionalityhadalowerresis-tancetowetting–dryingcyclesthantowarmingorNdeposition.Multifunctionalityresistancewasregulatedbychangesinmicrobialcomposition(relativeabundanceofphylotypes)butnotbyrich-ness,totalabundanceoffungiandbacteriaorthefungal:bacterialratio.Ourresu