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E.</style></author><author><style face="normal" font="default" size="100%">Hobbie, J. E.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Long-term response of the Kuparuk River ecosystem to phosphorus fertilization</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><volume><style face="normal" font="default" size="100%">85</style></volume><pages><style face="normal" font="default" size="100%">939-954</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">4</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.2004-71180</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%">Edwardson, K.J.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Dahm, C.</style></author><author><style face="normal" font="default" size="100%">Morrice, J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The hydraulic characteristics and geochemistry of hyporrheic and parafluvial zones in Arctic tundra streams, North Slope, Alaska.</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2003</style></year></dates><volume><style face="normal" font="default" size="100%">26</style></volume><pages><style face="normal" font="default" size="100%">907-923</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2003-71166</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%">Findlay, S.</style></author><author><style face="normal" font="default" size="100%">Dodds, W.K.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Tanks, J.L.</style></author><author><style face="normal" font="default" size="100%">Dye, S.</style></author><author><style face="normal" font="default" size="100%">Valett, H.M.</style></author><author><style face="normal" font="default" size="100%">Mulholland, P.J.</style></author><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Johnson, S.</style></author><author><style face="normal" font="default" size="100%">Hamilton, S.K.</style></author><author><style face="normal" font="default" size="100%">Edmonds, J.A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Bacterial and fungal biomass in detritus-based microhabitats of headwater streams</style></title></titles><keywords><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><volume><style face="normal" font="default" size="100%">43</style></volume><pages><style face="normal" font="default" size="100%">55-66</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2002-39739</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%">Findlay, S.</style></author><author><style face="normal" font="default" size="100%">Dodds, W.K.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Tank, J.</style></author><author><style face="normal" font="default" size="100%">Dye, S.</style></author><author><style face="normal" font="default" size="100%">Valett, H.M.</style></author><author><style face="normal" font="default" size="100%">Mulholland, P.J.</style></author><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Johnson, S.</style></author><author><style face="normal" font="default" size="100%">Hamilton, S.K.</style></author><author><style face="normal" font="default" size="100%">Edmonds, J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A cross-system comparison of bacterial and fungal biomass in detritus pools of headwater stream</style></title><secondary-title><style face="normal" font="default" size="100%">Microbial Ecology</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/findacro.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">43</style></volume><pages><style face="normal" font="default" size="100%">55-66</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2002-70521</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%">Dodds, W.K.</style></author><author><style face="normal" font="default" size="100%">Meyer, J.L.</style></author><author><style face="normal" font="default" size="100%">Morrall, D.</style></author><author><style face="normal" font="default" size="100%">Mulholland, P.J.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Tank, J.L.</style></author><author><style face="normal" font="default" size="100%">Vallet, H. M.</style></author><author><style face="normal" font="default" size="100%">Webster, J.R.</style></author><author><style face="normal" font="default" size="100%">Wollheim, W.</style></author><author><style face="normal" font="default" size="100%">Lopez, A.J.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Gregory, S.</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%">Hershey, A. E.</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></authors></contributors><titles><title><style face="normal" font="default" size="100%">N uptake as a function of concentration in streams</style></title><secondary-title><style face="normal" font="default" size="100%">J.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%">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/doddnupt.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">21</style></volume><pages><style face="normal" font="default" size="100%">206-220</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2002-70520</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%">Wollheim, W.M.</style></author><author><style face="normal" font="default" size="100%">Finlay, J</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Deegan, L.A.</style></author><author><style face="normal" font="default" size="100%">Hobbie, J. E.</style></author><author><style face="normal" font="default" size="100%">Hooker, B.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Edwardson, K.J.</style></author><author><style face="normal" font="default" size="100%">Arscott, D.B.</style></author><author><style face="normal" font="default" size="100%">Hershsey, A.E.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Influence of stream size on ammonium amd suspended particulate nitrogen processing</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">1-13</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.2001-71056</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%">Dodds, W.K.</style></author><author><style face="normal" font="default" size="100%">McDowell, W.H.</style></author><author><style face="normal" font="default" size="100%">Paul, M. J.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Fellows, C.S.</style></author><author><style face="normal" font="default" size="100%">Tank, J.L.</style></author><author><style face="normal" font="default" size="100%">Grimm, N.B.</style></author><author><style face="normal" font="default" size="100%">Webster, J.R.</style></author><author><style face="normal" font="default" size="100%">Hamilton, S.K.</style></author><author><style face="normal" font="default" size="100%">Marti, E.</style></author><author><style face="normal" font="default" size="100%">Ashkenas, L.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Inter-biome comparison of factors controlling stream metabolism.</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%">AND</style></keyword><keyword><style  face="normal" font="default" size="100%">CWT</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/1509.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">1503-1517.</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We studied whole-ecosystem metabolism in eight streams from several biomes in North America to identify controls on the rate of stream metabolism over a large geographic range. The streams studied had climates ranging from tropical to cool-temperate and from humid to arid and were all relatively uninfluenced by human disturbances. Rates of gross primary production (GPP), ecosystem respiration (R) and net ecosystem production (NEP) were determined using the open-system, two-station diurnal oxygen change method. Three general patterns in metabolism were evident among streams: (1) relatively high GPP with positive NEP (i.e. net oxygen production) in early afternoon, (2) moderate primary production with a distinct peak in GPP during daylight but negative NEP at all times and (3) little or no evidence of GPP during daylight and a relatively constant and negative NEP over the entire day. Gross primary production was most strongly correlated with photosynthetically active radiation (PAR). A multiple regression model that included log PAR and stream water soluble reactive phosphorus (SRP) concentration explained 90% of the variation in log GPP. Ecosystem respiration was significantly correlated with SRP concentration and size of the transient storage zone and, together, these factors explained 73% of the variation in R. The rate of R was poorly correlated with the rate of GPP. Net ecosystem production was significantly correlated only with PAR, with 53% of the variation in log NEP explained by log PAR. Only Sycamore Creek, a desert stream in Arizona had positive NEP (GPP: R&gt;1), supporting the idea that streams are generally net sinks rather than net sources of organic matter. Our results suggest that light, phosphorus concentration and channel hydraulics are important controls on the rate of ecosystem metabolism in streams over very extensive geographic areas.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.2001-80424</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%">Tank, J.L.</style></author><author><style face="normal" font="default" size="100%">Mulholland, P.J.</style></author><author><style face="normal" font="default" size="100%">Meyer, J.L.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Webster, J.R.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Contrasting food web linkages for the grazing pathway in three temperate forested streams using N-15 as a tracer.</style></title><secondary-title><style face="normal" font="default" size="100%">Verhandlungen International Vereinigung Limnology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CWT</style></keyword><keyword><style  face="normal" font="default" size="100%">HBR</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2000</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/3034.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">2832-2835.</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Nitrogen is a critical element controlling the productivity and dynamics of stream ecosystems and many streams are limited by the supply of biologically available nitrogen (e.g. Grimm and Fisher 1986, Lohman et al. 1991). We are learning more about the fate of inorganic nitrogen entering streams through 15N tracer additions (Peterson et al. 1997). The Lotic Intersite Nitrogen eXperiment (LINX) is studying the uptake, cycling, and fate of 15N-NH4 in the stream food web of 10 streams draining different biomes. Using the 15N tracer method and data from three sites in the study, we can differentiate patterns in the cycling of nitrogen through the grazing pathway (N from the epilithon to grazing macroinvertebrates) for three temperate forested streams. Here, we quantify the relationship between the dominant grazer and its proposed food resource, the epilithon, by comparing 15N levels of grazers with those of the epilithon, as well as the biomass, nitrogen content, and chlorophyll a standing stocks of the epilithon in three streams.</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.2000-80500</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%">Arscott, D.B.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Finlay, J.C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effects of desiccation and temperature/irradiance on the metabolism of 2 arctic stream bryophyte taxa</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2000</style></year></dates><volume><style face="normal" font="default" size="100%">19</style></volume><pages><style face="normal" font="default" size="100%">263-273</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.2000-71016</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%">Wollheim, W.M.</style></author><author><style face="normal" font="default" size="100%">Miller, M.C.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Deegan, L.A.</style></author><author><style face="normal" font="default" size="100%">Bahr, M.</style></author><author><style face="normal" font="default" size="100%">Hobbie, J. E.</style></author><author><style face="normal" font="default" size="100%">Jones, D.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Hershey, A. E.</style></author><author><style face="normal" font="default" size="100%">Kling, G. W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A coupled field and modeling approach for the analysis of nitrogen cycling in streams.</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1999</style></year></dates><volume><style face="normal" font="default" size="100%">18</style></volume><pages><style face="normal" font="default" size="100%">199-221</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.1999-71011</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%">Harvey, C.J.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Hershey, A. E.</style></author><author><style face="normal" font="default" size="100%">Miller, M.C.</style></author><author><style face="normal" font="default" size="100%">Deegan, L.A.</style></author><author><style face="normal" font="default" size="100%">Finlay, J.C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Biological responses of Oksrukuyik Creek, a tundra stream, to fertilization</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1998</style></year></dates><volume><style face="normal" font="default" size="100%">17</style></volume><pages><style face="normal" font="default" size="100%">190-209</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.1998-70976</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%">Arscott, D.B.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Finlay, J.C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Comparison of epilithic algal and bryophyte metabolism in an arctic tundra stream, Alaska</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ARC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1998</style></year></dates><volume><style face="normal" font="default" size="100%">17</style></volume><pages><style face="normal" font="default" size="100%">210-227</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.1998-70997</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>5</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hershey, A. E.</style></author><author><style face="normal" font="default" size="100%">Miller, M.C.</style></author><author><style face="normal" font="default" size="100%">Vestal, J. R.</style></author><author><style face="normal" font="default" size="100%">Schuldt, J. A.</style></author><author><style face="normal" font="default" size="100%">Bowden, W.B.</style></author><author><style face="normal" font="default" size="100%">Deegan, L.A.</style></author><author><style face="normal" font="default" size="100%">Hobbie, J. E.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Kipphut, G.W.</style></author><author><style face="normal" font="default" size="100%">Kling, G. W.</style></author><author><style face="normal" font="default" size="100%">Lock, M. A.</style></author><author><style face="normal" font="default" size="100%">Merritt, R. 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