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Purpose <p>This work aims to study the distribution features of eight potentially toxic heavy metals (Cd, Pb, Co, Cu, Ni, Zn, Cr, and Mn) and two biogenic elements (N and P) in the bottom sediments of beaver ponds in two small rivers of the Volga Upland’s far north of the East European Plain.</p> Methods <p>In 27 most typical beaver ponds, differing in their morphometric characteristics, as well as in some sections of the studied rivers unaffected by beaver activity, bottom sediments were collected in their upper, middle and lower reaches. The content of heavy metals and biogenic elements in the rivers’ water was also determined. The obtained results were processed using statistical methods.</p> Results <p>The concentration of mobile forms of Co, Cu, Ni, and Mn in the sampled sediments significantly exceeds their concentration in the soils of basin areas and in the sediments of riverbeds not affected by beavers. At the same time, the content of total Cd, Zn, and Mn, as well as N and P in the sediments of the upper reaches of the rivers is somewhat higher than in their lower reaches. The distribution of gross forms of heavy metals is significantly affected by the granulometric composition of bottom sediments and the content of organic matter in them. Statistically significant factors influencing the presence of mobile forms are the distance from the river mouth, the length of beaver dams and ponds, and the content of organic matter in bottom sediments. The distribution of biogenic elements correlates well with the height and length of beaver dams, the distance from the river mouth, and the content of organic matter in the sediments.</p> Conclusion <p>It was revealed that the bottom sediments of beaver ponds of the studied rivers are not contaminated with either gross or mobile forms of the studied chemical elements. For mobile forms, a moderate enrichment of Pb, Co, and Ni was found. Of all the analyzed heavy metals in the bottom sediments, compared with sections of the riverbed unaffected by beaver activity, an excess was observed only for Co, Cu, Ni, and Mn.</p>

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Heavy metals and biogenic elements in the bottom sediments of beaver ponds: A case study of small rivers of the Volga Upland’s far North (European Russia)

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Aidar G. Sharifullin,
  • Artyom V. Gusarov,
  • Dmitry V. Ivanov,
  • Achim A. Beylich

摘要

Purpose

This work aims to study the distribution features of eight potentially toxic heavy metals (Cd, Pb, Co, Cu, Ni, Zn, Cr, and Mn) and two biogenic elements (N and P) in the bottom sediments of beaver ponds in two small rivers of the Volga Upland’s far north of the East European Plain.

Methods

In 27 most typical beaver ponds, differing in their morphometric characteristics, as well as in some sections of the studied rivers unaffected by beaver activity, bottom sediments were collected in their upper, middle and lower reaches. The content of heavy metals and biogenic elements in the rivers’ water was also determined. The obtained results were processed using statistical methods.

Results

The concentration of mobile forms of Co, Cu, Ni, and Mn in the sampled sediments significantly exceeds their concentration in the soils of basin areas and in the sediments of riverbeds not affected by beavers. At the same time, the content of total Cd, Zn, and Mn, as well as N and P in the sediments of the upper reaches of the rivers is somewhat higher than in their lower reaches. The distribution of gross forms of heavy metals is significantly affected by the granulometric composition of bottom sediments and the content of organic matter in them. Statistically significant factors influencing the presence of mobile forms are the distance from the river mouth, the length of beaver dams and ponds, and the content of organic matter in bottom sediments. The distribution of biogenic elements correlates well with the height and length of beaver dams, the distance from the river mouth, and the content of organic matter in the sediments.

Conclusion

It was revealed that the bottom sediments of beaver ponds of the studied rivers are not contaminated with either gross or mobile forms of the studied chemical elements. For mobile forms, a moderate enrichment of Pb, Co, and Ni was found. Of all the analyzed heavy metals in the bottom sediments, compared with sections of the riverbed unaffected by beaver activity, an excess was observed only for Co, Cu, Ni, and Mn.