4 Global negative effects of nitrogen deposition o

4 Global negative effects of nitrogen deposition on soil microbes.TheISMEJournalhttps://doi.org/10.1038/s41396-018-0096-yARTICLEGlobalnegativeeffectsofnitrogendepositiononsoilmicrobesTian’anZhang1●HanY.H.Chen2●HonghuaRuan1Received:24October2017/Revised:13February2018/Accepted:20February2018©InternationalSocietyforMicrobialEcology2018AbstractSoilmicrobescomprisealargeportionofthegeneticdiversityonEarthandinfluencealargenumberofimportantecosystemprocesses.Increasingatmosphericnitrogen(N)depositionrepresentsamajorglobalchangedriver;however,itisstilldebatedwhethertheimpactsofNdepositiononsoilmicrobialbiomassandrespirationareecosystem-typedependent.Moreover,theextentofNdepositionimpactsonmicrobialcompositionremainsunclear.Hereweconductaglobalmeta-analysisusing1408pairedobservationsfrom151studiestoevaluatetheresponsesofsoilmicrobialbiomass,composition,andfunctiontoNaddition.Weshowthatnitrogenadditionreducedtotalmicrobialbiomass,bacterialbiomass,fungalbiomass,biomasscarbon,andmicrobialrespira