<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Helton, A.M.</style></author><author><style face="normal" font="default" size="100%">Poole, G.C.</style></author><author><style face="normal" font="default" size="100%">Meyer, J. L.</style></author><author><style face="normal" font="default" size="100%">Wollheim, W. M.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.J.</style></author><author><style face="normal" font="default" size="100%">Mulholland, P. J.</style></author><author><style face="normal" font="default" size="100%">E. S. Bernhardt</style></author><author><style face="normal" font="default" size="100%">Stanford, J.A.</style></author><author><style face="normal" font="default" size="100%">Arango, C.</style></author><author><style face="normal" font="default" size="100%">Ashkenas, L. R.</style></author><author><style face="normal" font="default" size="100%">Cooper, L.W.</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%">Hall, R.O.</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><author><style face="normal" font="default" size="100%">McDowel, W.H.</style></author><author><style face="normal" font="default" size="100%">Potter, J.D.</style></author><author><style face="normal" font="default" size="100%">Tank, J. L.</style></author><author><style face="normal" font="default" size="100%">Thomas, S.M.</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%">Zeglin, L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Thinking outside the channel: Modeling nitrogen cycling in networked river ecosystems</style></title><secondary-title><style face="normal" font="default" size="100%">Frontiers in Ecology and the Enviroment</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">05/2011</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.fs.fed.us/pnw/pubs/journals/pnw_2011_helton001.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">229 - 238</style></pages><abstract><style face="normal" font="default" size="100%">Agricultural and urban development alters nitrogen and other biogeochemical cycles in rivers worldwide. Because such biogeochemical processes cannot be measured empirically across whole river networks, simula­tion models are critical tools for understanding river-network biogeochemistry. However, limitations inherent in current models restrict our ability to simulate biogeochemical dynamics among diverse river networks. We illustrate these limitations using a river-network model to scale up in situ measures of nitrogen cycling in eight 
catchments spanning various geophysical and land-use conditions. Our model results provide evidence that catchment characteristics typically excluded from models may control river-network biogeochemistry. Based on our findings, we identify important components of a revised strategy for simulating biogeochemical dynamics in river networks, including approaches to modeling terrestrial-aquatic linkages, hydrologic 
exchanges between the channel, floodplain/riparian complex, and subsurface waters, and interactions between coupled biogeochemical cycles. </style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue><accession-num><style face="normal" font="default" size="100%">LUQ.1049</style></accession-num><notes><style face="normal" font="default" size="100%">1/26/2012. Posted in Drupal only.</style></notes><section><style face="normal" font="default" size="100%">229</style></section></record></records></xml>