caa a22 4500 44538381X CHVBK 20180317143025.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10021-011-9415-0 doi (NATIONALLICENCE)springer-10.1007/s10021-011-9415-0 A Non-Native Riparian Tree ( Elaeagnus angustifolia ) Changes Nutrient Dynamics in Streams [Elektronische Daten] [Madeleine Mineau, Colden Baxter, Amy Marcarelli] Russian olive (Elaeagnus angustifolia) is a non-native riparian tree that has become common and continues to rapidly spread throughout the western United States. Due to its dinitrogen (N2)-fixing ability and proximity to streams, Russian olive has the potential to subsidize stream ecosystems with nitrogen (N), which may in turn alter nutrient processing in these systems. We tested these potential effects by comparing background N concentrations; nutrient limitation of biofilms; and uptake of ammonium (NH4-N), nitrate (NO3-N), and phosphate (PO4-P) in paired upstream-reference and downstream-invaded reaches in streams in southeastern Idaho and central Wyoming. We found that stream reaches invaded by Russian olive had higher organic N concentrations and exhibited reduced N limitation of biofilms compared to reference reaches. However, at low inorganic N background concentrations, reaches invaded by Russian olive exhibited higher demand for both NH4-N and NO3-N compared to their paired reference reaches, suggesting these streams have the potential to retain the N subsidy from Russian olive N2 fixation and diminish its downstream export and effects. Our findings demonstrate the potential for a non-native riparian plant to significantly alter biogeochemical cycling in streams. Finally, we used our results to develop a conceptual model that describes predicted effects of Russian olive and other non-native riparian N2 fixers on in-stream N dynamics. Springer Science+Business Media, LLC, 2011 Elaeagnus angustifolia nationallicence Russian olive nationallicence invasive species nationallicence nitrogen fixation nationallicence nutrient limitation nationallicence nutrient spiraling nationallicence subsidy nationallicence DON nationallicence Mineau Madeleine Stream Ecology Center, Department of Biological Sciences, Idaho State University, 921 S 8th Ave, Stop 8007, 83209-8007, Pocatello, Idaho, USA aut Baxter Colden Stream Ecology Center, Department of Biological Sciences, Idaho State University, 921 S 8th Ave, Stop 8007, 83209-8007, Pocatello, Idaho, USA aut Marcarelli Amy Stream Ecology Center, Department of Biological Sciences, Idaho State University, 921 S 8th Ave, Stop 8007, 83209-8007, Pocatello, Idaho, USA aut Ecosystems Springer-Verlag 14/3(2011-04-01), 353-365 1432-9840 14:3<353 2011 14 10021 https://doi.org/10.1007/s10021-011-9415-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9415-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mineau Madeleine Stream Ecology Center, Department of Biological Sciences, Idaho State University, 921 S 8th Ave, Stop 8007, 83209-8007, Pocatello, Idaho, USA aut NATIONALLICENCE 700 1- Baxter Colden Stream Ecology Center, Department of Biological Sciences, Idaho State University, 921 S 8th Ave, Stop 8007, 83209-8007, Pocatello, Idaho, USA aut NATIONALLICENCE 700 1- Marcarelli Amy Stream Ecology Center, Department of Biological Sciences, Idaho State University, 921 S 8th Ave, Stop 8007, 83209-8007, Pocatello, Idaho, USA aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/3(2011-04-01), 353-365 1432-9840 14:3<353 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer