<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Magill, A.</style></author><author><style face="normal" font="default" size="100%">Aikenhead-Peterson, J.A.</style></author><author><style face="normal" font="default" size="100%">Aber, J.D.</style></author><author><style face="normal" font="default" size="100%">Merriam, J.L.</style></author><author><style face="normal" font="default" size="100%">Kaushal, S. S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effects of chronic nitogen amendment on dissolved organic matter and inorganic nitrogen soil solution.</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">HFR</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><volume><style face="normal" font="default" size="100%">196</style></volume><pages><style face="normal" font="default" size="100%">29-41</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">1</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.2004-50976</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Mulholland, P.J.</style></author><author><style face="normal" font="default" size="100%">Marti, E.</style></author><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Merriam, J.L.</style></author><author><style face="normal" font="default" size="100%">Meyer, J.L.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Valett, H.M.</style></author><author><style face="normal" font="default" size="100%">Wollheim, W.M.</style></author><author><style face="normal" font="default" size="100%">Tank, J.L.</style></author><author><style face="normal" font="default" size="100%">Webster, J.R.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Dodds, W.K.</style></author><author><style face="normal" font="default" size="100%">Gregory, S.V.</style></author><author><style face="normal" font="default" size="100%">Grimm, N.B.</style></author><author><style face="normal" font="default" size="100%">Hamilton, S.K.</style></author><author><style face="normal" font="default" size="100%">Johnson, S.L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Can uptake length in streams be determined by nutrient addition experiments? Results from an interbiome comparison study.</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of the North American Benthological Society</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CWT</style></keyword><keyword><style  face="normal" font="default" size="100%">KBS</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/2057.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">21(4)</style></volume><pages><style face="normal" font="default" size="100%">544-560.</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Nutrient uptake length is an important parameter for quantifying nutrient cycling in streams. Although nutrient tracer additions are the preferred method for measuring uptake length under ambient nutrient concentrations, short-term nutrient addition experiments have more frequently been used to estimate uptake length in streams. Theoretical analysis of the relationship between uptake length determined by nutrient addition experiments (Sw') and uptake length determined by tracer additions (Sw) predicted that Sw' should be consistently longer than Sw, and that the overestimate of uptake length by Sw' should be related to the level of nutrient addition above ambient concentrations and the degree of nutrient limitation. To test these predictions, we used data from an interbiome study of NH4+ uptake length in which 15NH4+ tracer and short-term NH4+ addition experiments were performed in 10 streams using a uniform experimental approach. The experimental results largely confirmed the theoretical predictions: S- w</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.2002-80414</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Merriam, J.L.</style></author><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Tank, J.L.</style></author><author><style face="normal" font="default" size="100%">Wolheim, W.M.</style></author><author><style face="normal" font="default" size="100%">Crenshaw, CL</style></author><author><style face="normal" font="default" size="100%">Johnson, S.L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Characterizing nitrogen dynamics, transport, and retention in a tropical rainforest stream using an in situ 15N addition</style></title><secondary-title><style face="normal" font="default" size="100%">Freshwater Biology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">LUQ</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://luq.lternet.edu/publications/lterpub/merrchar.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">47</style></volume><pages><style face="normal" font="default" size="100%">143-160</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2002-70533</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Groffman, P.M.</style></author><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Myers, J.C.</style></author><author><style face="normal" font="default" size="100%">Merriam, J.L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Soil microbial biomass and activity in tropical riparian forests</style></title><secondary-title><style face="normal" font="default" size="100%">Soil Biology and Biochemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">LUQ</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><volume><style face="normal" font="default" size="100%">33</style></volume><pages><style face="normal" font="default" size="100%">1339-1348</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2001-70483</style></accession-num></record></records></xml>