000908764 001__ 908764 000908764 005__ 20230123110634.0 000908764 0247_ $$2doi$$a10.1007/s10533-022-00951-7 000908764 0247_ $$2ISSN$$a0168-2563 000908764 0247_ $$2ISSN$$a1573-515X 000908764 0247_ $$2Handle$$a2128/31633 000908764 0247_ $$2WOS$$aWOS:000827380500001 000908764 037__ $$aFZJ-2022-02820 000908764 082__ $$a550 000908764 1001_ $$00000-0002-6570-3837$$aTempler, P. H.$$b0$$eCorresponding author 000908764 245__ $$aAtmospheric deposition and precipitation are important predictors of inorganic nitrogen export to streams from forest and grassland watersheds: a large-scale data synthesis 000908764 260__ $$aDordrecht [u.a.]$$bSpringer Science + Business Media B.V.$$c2022 000908764 3367_ $$2DRIVER$$aarticle 000908764 3367_ $$2DataCite$$aOutput Types/Journal article 000908764 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1661153128_727 000908764 3367_ $$2BibTeX$$aARTICLE 000908764 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000908764 3367_ $$00$$2EndNote$$aJournal Article 000908764 520__ $$aPrevious 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. 000908764 536__ $$0G:(DE-HGF)POF4-2173$$a2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217)$$cPOF4-217$$fPOF IV$$x0 000908764 588__ $$aDataset connected to CrossRef, Journals: juser.fz-juelich.de 000908764 7001_ $$0P:(DE-HGF)0$$aHarrison, J. L.$$b1 000908764 7001_ $$0P:(DE-HGF)0$$aPilotto, F.$$b2 000908764 7001_ $$0P:(DE-HGF)0$$aFlores-Díaz, A.$$b3 000908764 7001_ $$0P:(DE-HGF)0$$aHaase, P.$$b4 000908764 7001_ $$0P:(DE-HGF)0$$aMcDowell, W. H.$$b5 000908764 7001_ $$0P:(DE-HGF)0$$aSharif, R.$$b6 000908764 7001_ $$0P:(DE-HGF)0$$aShibata, H.$$b7 000908764 7001_ $$0P:(DE-HGF)0$$aBlankman, D.$$b8 000908764 7001_ $$0P:(DE-HGF)0$$aAvila, A.$$b9 000908764 7001_ $$0P:(DE-HGF)0$$aBaatar, U.$$b10 000908764 7001_ $$0P:(DE-Juel1)129440$$aBogena, Heye$$b11 000908764 7001_ $$0P:(DE-HGF)0$$aBourgeois, I.$$b12 000908764 7001_ $$0P:(DE-HGF)0$$aCampbell, J.$$b13 000908764 7001_ $$0P:(DE-HGF)0$$aDirnböck, T.$$b14 000908764 7001_ $$0P:(DE-HGF)0$$aDodds, W. K.$$b15 000908764 7001_ $$0P:(DE-HGF)0$$aHauken, M.$$b16 000908764 7001_ $$0P:(DE-HGF)0$$aKokorite, I.$$b17 000908764 7001_ $$0P:(DE-HGF)0$$aLajtha, K.$$b18 000908764 7001_ $$0P:(DE-HGF)0$$aLai, I.-L.$$b19 000908764 7001_ $$0P:(DE-HGF)0$$aLaudon, H.$$b20 000908764 7001_ $$0P:(DE-Juel1)162420$$aLin, T. C.$$b21 000908764 7001_ $$0P:(DE-HGF)0$$aLins, S. R. 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