Effects of anthropogenic heavy metal contamination on litter decomposition in streams - A meta-analysis

Environmental Pollution
Verónica FerreiraFrançois Guérold

Abstract

Many streams worldwide are affected by heavy metal contamination, mostly due to past and present mining activities. Here we present a meta-analysis of 38 studies (reporting 133 cases) published between 1978 and 2014 that reported the effects of heavy metal contamination on the decomposition of terrestrial litter in running waters. Overall, heavy metal contamination significantly inhibited litter decomposition. The effect was stronger for laboratory than for field studies, likely due to better control of confounding variables in the former, antagonistic interactions between metals and other environmental variables in the latter or differences in metal identity and concentration between studies. For laboratory studies, only copper + zinc mixtures significantly inhibited litter decomposition, while no significant effects were found for silver, aluminum, cadmium or zinc considered individually. For field studies, coal and metal mine drainage strongly inhibited litter decomposition, while drainage from motorways had no significant effects. The effect of coal mine drainage did not depend on drainage pH. Coal mine drainage negatively affected leaf litter decomposition independently of leaf litter identity; no significant effect was fo...Continue Reading

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Citations

Jan 20, 2017·Environmental Science and Pollution Research International·Mayumi AllinsonGraeme Allinson
Sep 15, 2018·Environmental Monitoring and Assessment·Elliott KellnerCharlene Kelly
Feb 2, 2019·Bulletin of Environmental Contamination and Toxicology·Jochen P ZubrodMirco Bundschuh
Oct 17, 2020·The Science of the Total Environment·Houssou Assa AlbertHailong Wang
Nov 22, 2019·Water Research·Jérémy JabiolFrançois Guérold
May 17, 2021·Environmental Pollution·Zahra ArabiEduardo Moreno-Jiménez
Aug 14, 2021·Ecotoxicology and Environmental Safety·Lu-Lu HeQi-Hong Zhu

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