| Autor: |
Palov, Daniel D., Aleksova, Michaella R., Nikolova, Radina N., Dinev, Nikolai S., Kenarova, Anelia E., Boteva, Silvena B., Dimitrov, Roumen A., Radeva, Galina S. |
| Předmět: |
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| Zdroj: |
Ecologia Balkanica; 2020 Special Issue, p31-39, 9p |
| Abstrakt: |
In this study, the relationships between soil abiotic factors, heavy metals content and soil microbial activity, bacterial abundance, bacterial genotype richness and diversity were analysed in three sites along a Cu gradient (from 53 to 860 mg kg -1) and co-contaminants Zn and Pb, located in the region of Zlatitsa-Pirdop valley, Western Bulgaria. Long-term heavy metal contamination had a significant negative effect on soil microbial activity and our results showed that the dehydrogenase activity (DHA) decreased along the contamination gradient with up to 79% compared to the uncontaminated sample. The principal component analysis (PCA) showed that DHA correlated significantly and positively with total bacterial abundance (16S rRNA gene copies) and nitrate ions (NO3-N), and negatively with soil pH, heavy metals and their bioavailable forms. Bacterial genotype diversity was mainly influenced by abiotic factors such as soil organic matter and sand fraction of the studied sites. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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