Abstract
Concentrations of metallothioneins (MT) were analysed in bivalve molluscs Anodonta spp. and Unio spp. from 6 lakes and watercourses of Latvia with different anthropogenic pressure. The aim of the study was to find the relationship between MT in molluscs and concentrations of heavy metals in sediments. Unio spp. and Anodonta spp. showed no significant differences in the concentrations of MT. High concentrations of heavy metals (Cd, Pb, Hg, Cu, Zn) were detected in the deepest parts of polluted water bodies, however their concentrations significantly decreased in near shore sediments inhabited by molluscs. Only Zn tends to accumulate in the molluscs, reaching 2-7 times higher concentrations in organisms than in sediments. There was statistically significant correlation between MT and Hg due to high affinity of Hg to MT-complex. Concentrations of Hg and MT in molluscs were related also to condition index of molluscs, suggesting that accumulation of heavy metals in molluscs depends on their physiological status.
| Original language | English |
|---|---|
| Article number | 34005 |
| Journal | E3S Web of Conferences |
| Volume | 1 |
| DOIs | |
| Publication status | Published - 23 Apr 2013 |
| Event | 16th International Conference on Heavy Metals in the Environment, ICHMET 2012 - Rome, Italy Duration: 23 Sept 2013 → 27 Sept 2013 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 6 Clean Water and Sanitation
Keywords
- Biomarkers
- Lakes
- Metallothionein
- Molluscs
- North-eastern Europe
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