naa a22 4500 51075094X CHVBK 20180411083104.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11270-013-1744-5 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1744-5 Building upon the Conceptual Model for Soil Mercury Flux: Evidence of a Link Between Moisture Evaporation and Hg Evasion [Elektronische Daten] [Christian Briggs, Mae Gustin] Parameters known to influence mercury (Hg) release from soils include substrate and air Hg concentration, light, atmospheric oxidants, temperature, and soil moisture. However, for low Hg-containing soils, the influence of these parameters has been shown to vary across space and time. Here, we expand upon previous work by investigating whether soil-water evaporative loss, which integrates the influence of multiple parameters, could be applied for predicting Hg flux from soil with low Hg concentrations when bare and planted. To investigate our hypothesis, Hg flux was measured from three soil types (<100ng Hg g−1). When these soils were saturated, flux was suppressed. Soil moisture evaporative stage was used to partition the parameters most important for controlling Hg flux as the soils dried. Classification and regression tree (CART) analyses showed that soil moisture was the most important parameter predicting Hg flux. Results also showed an important predictor for Hg flux was whether actual evaporation (E a) was equal to potential evaporation (E p) or E a < E p. Depending on evaporative stage, the parameters with the next highest correlation to Hg flux were light, temperature, and soil moisture evaporation rate. The presence of vegetation also influenced flux with lower Hg flux when the plants were transpiring. Results indicate for those developing models that estimate Hg flux from low Hg-containing soils, soil moisture and evaporative stage are useful tools for predicting flux. Springer Science+Business Media Dordrecht, 2013 Potential evaporation nationallicence Low Hg-containing soils nationallicence Soil Hg flux model nationallicence Vegetation and Hg flux nationallicence Ryegrass nationallicence Briggs Christian Department of Natural Resources and Environmental Science, MS 186, University of Nevada, Reno, 89557, Reno, NV, USA aut Gustin Mae Department of Natural Resources and Environmental Science, MS 186, University of Nevada, Reno, 89557, Reno, NV, USA aut Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-13 0049-6979 224:10<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1744-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1744-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Briggs Christian Department of Natural Resources and Environmental Science, MS 186, University of Nevada, Reno, 89557, Reno, NV, USA aut NATIONALLICENCE 700 1- Gustin Mae Department of Natural Resources and Environmental Science, MS 186, University of Nevada, Reno, 89557, Reno, NV, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-13 0049-6979 224:10<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer