<?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%">Ragsdale, J. L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Trace metals in the atmosphere, forest floor, soil, and vegetation.</style></title><secondary-title><style face="normal" font="default" size="100%">Pages 367-380 in W</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%">1988</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/566.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%">Substantial increases in ambient levels of toxic trace metals, such as lead (Pb), are directly attributable to coal combustion, metal smelting, waste disposal, and the twentieth century use of leaded alkyl derivatives in gasoline. The soil column (O1 + O2, A, and upper B horizon) of two, low-elevation control watersheds in the Coweeta Basin contains lower concentrations of trace elements (Cu, Zn, Pb, and Cd) than commonly reported for many other North American sites. The litter-humus forest floor burdens of Cu, Pb, and Zn were 20 times smaller than found in forests of the industrialized northeastern United States. Lead concentrations in the high elevation Albert Mountain litter and humus samples were significantly greater than those at the lower elevations. The greater lead concentrations at high elevation result from long range transport and deposition of airborne lead particles.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.1988-80960</style></accession-num></record></records></xml>