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dc.contributor.authorTempler, P.H.
dc.contributor.authorHarrison, J.L.
dc.contributor.authorPilotto, Francesca
dc.contributor.authorFlores-Díaz, A.
dc.contributor.authorHaase, P.
dc.contributor.authorMcDowell, W.H.
dc.contributor.authorSharif, R.
dc.contributor.authorShibata, H.
dc.contributor.authorBlankman, D.
dc.contributor.authorAvila, A.
dc.contributor.authorBaatar, U.
dc.contributor.authorBogena, H.R.
dc.contributor.authorBourgeois, I.
dc.contributor.authorCampbell, J.
dc.contributor.authorDirnböck, T.
dc.contributor.authorDodds, W.K.
dc.contributor.authorHauken, Marit
dc.contributor.authorKokorite, I.
dc.contributor.authorLajtha, K.
dc.contributor.authorLai, I.-L.
dc.contributor.authorLaudon, H.
dc.contributor.authorLin, T.C.
dc.contributor.authorLins, S.R.M.
dc.contributor.authorMeesenburg, H.
dc.contributor.authorPinho, P.
dc.contributor.authorRobison, A.
dc.contributor.authorRogora, M.
dc.contributor.authorScheler, B.
dc.contributor.authorSchleppi, P.
dc.contributor.authorSommaruga, R.
dc.contributor.authorStaszewski, T.
dc.contributor.authorTaka, M.
dc.coverage.spatialEurope, North America, East Asiaen_US
dc.identifier.citationBiogeochemistry. 2022, 160 (2), 219-241.en_US
dc.description.abstractPrevious studies have evaluated how changes in atmospheric nitrogen (N) inputs and climate affect stream N concentrations and fluxes, but none have synthesized data from sites around the globe. We identified variables controlling stream inorganic N concentrations and fluxes, and how they have changed, by synthesizing 20 time series ranging from 5 to 51 years of data collected from forest and grassland dominated watersheds across Europe, North America, and East Asia and across four climate types (tropical, temperate, Mediterranean, and boreal) using the International Long-Term Ecological Research Network. We hypothesized that sites with greater atmospheric N deposition have greater stream N export rates, but that climate has taken a stronger role as atmospheric deposition declines in many regions of the globe. We found declining trends in bulk ammonium and nitrate deposition, especially in the longest time-series, with ammonium contributing relatively more to atmospheric N deposition over time. Among sites, there were statistically significant positive relationships between (1) annual rates of precipitation and stream ammonium and nitrate fluxes and (2) annual rates of atmospheric N inputs and stream nitrate concentrations and fluxes. There were no significant relationships between air temperature and stream N export. Our long-term data shows that although N deposition is declining over time, atmospheric N inputs and precipitation remain important predictors for inorganic N exported from forested and grassland watersheds. Overall, we also demonstrate that long-term monitoring provides understanding of ecosystems and biogeochemical cycling that would not be possible with short-term studies alone.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectBulk nitrogen depositionen_US
dc.subjectAtmospheric pollutionen_US
dc.subjectWater qualityen_US
dc.titleAtmospheric deposition and precipitation are important predictors of inorganic nitrogen export to streams from forest and grassland watersheds: a large-scale data synthesisen_US
dc.title.alternativeAtmospheric deposition and precipitation are important predictors of inorganic nitrogen export to streams from forest and grassland watersheds: a large-scale data synthesisen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2022 The Authorsen_US
dc.relation.projectNational Science Foundation: OCE 1637630en_US
dc.relation.projectNational Science Foundation: 1828910en_US
dc.relation.projectNational Science Foundation: DEB-1257032en_US
dc.relation.projectNational Science Foundation: DEB-1440409en_US
dc.relation.projectNational Science Foundation: DEB-1907683en_US
dc.relation.projectNational Science Foundation: DEB 1637685en_US
dc.relation.projectNational Science Foundation: DEB 2025849en_US
dc.relation.projectNational Science Foundation: 1831592en_US

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