<?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%">Johnson, D.W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Markers of air pollution in forests: nutrient cycling.</style></title><secondary-title><style face="normal" font="default" size="100%">Pages 133-142 in Biological markers of air-pollution stress and damage in forests</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CWT</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1989</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/755.pdf</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Air pollution may affect forest nutrient cycles in a number of ways, but many of these effects are difficult to evaluate because control sites unaffected by air pollution are seldom available for comparison. This paper summarizes the potential utility of using the following nutrient cycling processes as markers of air pollution: nutrient content and flux in forest ecosystems; decomposition; soil leaching rates; and stream water chemistry.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.1989-80893</style></accession-num></record></records></xml>