A synthesis of terrestrial mercury in the western United States: Spatial distribution defined by land cover and plant productivity

The Science of the Total Environment
D ObristCharles N Alpers

Abstract

A synthesis of published vegetation mercury (Hg) data across 11 contiguous states in the western United States showed that aboveground biomass concentrations followed the order: leaves (26μgkg(-1))~branches (26μgkg(-1))>bark (16μgkg(-1))>bole wood (1μgkg(-1)). No spatial trends of Hg in aboveground biomass distribution were detected, which likely is due to very sparse data coverage and different sampling protocols. Vegetation data are largely lacking for important functional vegetation types such as shrubs, herbaceous species, and grasses. Soil concentrations collected from the published literature were high in the western United States, with 12% of observations exceeding 100μgkg(-1), reflecting a bias toward investigations in Hg-enriched sites. In contrast, soil Hg concentrations from a randomly distributed data set (1911 sampling points; Smith et al., 2013a) averaged 24μgkg(-1) (A-horizon) and 22μgkg(-1) (C-horizon), and only 2.6% of data exceeded 100μgkg(-1). Soil Hg concentrations significantly differed among land covers, following the order: forested upland>planted/cultivated>herbaceous upland/shrubland>barren soils. Concentrations in forests were on average 2.5 times higher than in barren locations. Principal component an...Continue Reading

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Mar 5, 2016·The Science of the Total Environment·Chris S EckleyDavid B Smith
Apr 23, 2016·The Science of the Total Environment·Collin A Eagles-SmithColleen Flanagan Pritz
May 1, 2016·The Science of the Total Environment·Jacob A FleckChris S Eckley
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Jun 25, 2016·The Science of the Total Environment·Laura ChiarantiniMario Paolieri
Jul 6, 2016·The Science of the Total Environment·Charles N AlpersMark C Marvin-DiPasquale
Feb 22, 2016·The Science of the Total Environment·Jackson P. WebsterGeorge R Aiken
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Feb 13, 2019·The Science of the Total Environment·Christine L OlsonDaniel Obrist
Mar 14, 2021·Environmental Pollution·Chris S EckleyDavid P Krabbenhoft
Mar 20, 2021·The Science of the Total Environment·Cristiano BallabioPanos Panagos
Jul 18, 2021·Proceedings of the National Academy of Sciences of the United States of America·Daniel ObristRóisín Commane
Aug 23, 2019·Environmental Science & Technology·Xun WangXinbin Feng
Oct 8, 2021·Environmental Science & Technology·Jun Zhou, Daniel Obrist

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