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<p>This study investigated the content of polycyclic aromatic hydrocarbons in plants from a protected bog in the middle taiga of the Komi Republic, Russia using high-performance liquid chromatography. Data on polyarenes concentrations in marsh plants are crucial, as these plants are one of the primary source of polycyclic aromatic hydrocarbons in peat within natural ecosystems. Light molecular weight structures dominated the polycyclic aromatic hydrocarbons profiles, accounting for 89–94% of the total. <i>Rhododendron tomentosum</i> and <i>Betula nana</i> exhibited the highest polyarenes accumulation, while <i>Equisetum fluviatile</i> showed the lowest. The primary pathway of polycyclic aromatic hydrocarbons intake for <i>Rhododendron tomentosum</i>, <i>Chamaedaphne calyculata</i>, <i>Menyanthes trifoliata</i>, <i>Carex rostrata</i>, <i>Sphagnum</i> sp., and <i>Equisetum fluviatile</i> was atmospheric deposition through above-ground plant parts. In contrast, root absorption from bog waters served as the dominant accumulation mechanism for <i>Betula nana</i> and <i>Vaccinium oxycoccos</i>. Morpho-physiological features of the plants exerted a greater influence on polyarenes accumulation than the trophic status of the mire habitats. Analysis of the divergence coefficient revealed distinct polycyclic aromatic hydrocarbons sources for middle taiga plants compared to those from the tundra and forest-tundra. Diagnostic ratios, alongside Principal Component Analysis and Positive Matrix Factorization, identified mixed polycyclic aromatic hydrocarbons sources, including regional atmospheric transport, local emissions, forest fires, and intracellular synthesis within the plants. Although the total toxicity equivalency concentrations of polycyclic aromatic hydrocarbons in the middle taiga plants exceeded those in the tundra and forest-tundra due to a higher content of 5-ring polyarenes, the toxicity levels in this protected area remain within background concentrations.</p>

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Polycyclic aromatic hydrocarbons profiles in plants of protected mire ecosystems

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • E. V. Yakovleva,
  • D. N. Gabov,
  • N. N. Goncharova,
  • R. S. Vasilevich,
  • A. B. Novakovskiy,
  • Y. A. Dubrovskiy

摘要

This study investigated the content of polycyclic aromatic hydrocarbons in plants from a protected bog in the middle taiga of the Komi Republic, Russia using high-performance liquid chromatography. Data on polyarenes concentrations in marsh plants are crucial, as these plants are one of the primary source of polycyclic aromatic hydrocarbons in peat within natural ecosystems. Light molecular weight structures dominated the polycyclic aromatic hydrocarbons profiles, accounting for 89–94% of the total. Rhododendron tomentosum and Betula nana exhibited the highest polyarenes accumulation, while Equisetum fluviatile showed the lowest. The primary pathway of polycyclic aromatic hydrocarbons intake for Rhododendron tomentosum, Chamaedaphne calyculata, Menyanthes trifoliata, Carex rostrata, Sphagnum sp., and Equisetum fluviatile was atmospheric deposition through above-ground plant parts. In contrast, root absorption from bog waters served as the dominant accumulation mechanism for Betula nana and Vaccinium oxycoccos. Morpho-physiological features of the plants exerted a greater influence on polyarenes accumulation than the trophic status of the mire habitats. Analysis of the divergence coefficient revealed distinct polycyclic aromatic hydrocarbons sources for middle taiga plants compared to those from the tundra and forest-tundra. Diagnostic ratios, alongside Principal Component Analysis and Positive Matrix Factorization, identified mixed polycyclic aromatic hydrocarbons sources, including regional atmospheric transport, local emissions, forest fires, and intracellular synthesis within the plants. Although the total toxicity equivalency concentrations of polycyclic aromatic hydrocarbons in the middle taiga plants exceeded those in the tundra and forest-tundra due to a higher content of 5-ring polyarenes, the toxicity levels in this protected area remain within background concentrations.