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Título

Long-term impact of acid resin waste deposits on soil quality of forest areas II. Biological indicators

Autor Pérez de Mora, Alfredo ; Madejón, Engracia ; Cabrera, Francisco ; Buegger, Franz; Fuß, Roland; Pritsch, Karin; Schloter, Michael
Palabras clave Acid resin
Enzyme activities
Heavy metals
Hydrocarbons
Trace elements
Total DNA
Fecha de publicación 11-nov-2008
Citación Science of the Total Environment 406(1-2): 99–107 (2008)
ResumenIn this study, we evaluated the effects of two acid resin deposits on the soil microbiota of forest areas by means of biomass, microbial activity-related estimations and simple biological ratios. The determinations carried out included: total DNA yield, basal respiration, intracellular enzyme activities (dehydrogenase and catalase) and extracellular enzyme activities involved in the cycles of C (-glucosidase and chitinase), N (protease) and P (acid-phosphatase). The calculated ratios were: total DNA/total N; basal respiration/total DNA; dehydrogenase/total DNA and catalase/total DNA. Total DNA yield was used to estimate soil microbial biomass. Results showed that microbial biomass and activity were severely inhibited in the deposits, whilst resin effects on contaminated zones were variable and site-dependant. Correlation analysis showed no clear effect of contaminants on biomass and activities outside the deposits, but a strong interdependence with natural organic matter related parameters such as total N. In contrast, by using simple ratios we could detect more stressful conditions in terms of organic matter turnover and basal metabolism in contaminated areas compared to their uncontaminated counterparts. These results stress that developed ecosystems such as forests can buffer the effects of pollutants and preserve high functionality via natural attenuation mechanisms, but also that acid resins can be toxic to biological targets negatively affecting soil dynamics. Acid resin deposits can therefore act as contaminant sources adversely altering soil processes and reducing the environmental quality of affected areas despite the solid nature of these wastes.
Versión del editor10.1016/j.scitotenv.2008.07.036
http://dx.doi.org/10.1016/j.scitotenv.2008.07.036
URI http://hdl.handle.net/10261/7968
DOI10.1016/j.scitotenv.2008.07.036
ISSN0048-9697
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