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<p>The industrial revolution has caused significant toxic metal contamination in the coastal ecosystem, particularly in emerging nations. Recently, mangroves have garnered global attention due to their toxicity, incapacity to decompose, abundance, consequent bioaccumulation, and trophic level-dependent biomagnification. This study intends to examine the pollution levels and toxic metal content in mangrove surface silt and plants in the Purna River Estuary (Navsari). The findings indicate that harmful metal levels in the sediments exceed the background values of natural, suggesting anthropogenic sources. This research emphasizes the assessment and evaluation of mangrove species across the Gulf of Khambhat to identify the adverse effects of climate change, urbanization / Industrialization, and adaptation mechanisms in selected mangrove species. Among all the heavy metals analyzed, the concentration was found to be highest for Fe &gt; Mn &gt; Sr &gt; Ti &gt; Cr. Contamination indices such as enrichment factors, accumulation index, and contamination factors were highest in Ni and Cr metals. Approximately 42.85% of all the sites found considerable contamination. Additionally, four mangrove plant species were selected for assessing heavy metal bioaccumulation. The highest bioaccumulation was observed in <i>Avicenna marina</i>, followed closely by with <i>Bruguiera cylindrica</i>, <i>Acanthus ilicifolius</i>, and <i>Sonneratia apetala.</i> In these plants, highest bioaccumulation concentration of Cu &gt; Zn &gt; Sr &gt; Mn were detected across all the selected sites.</p>

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Toxic metal concentration in soil and mangrove plant species across Purna River Estuary, Gulf of Khambhat, Gujarat

  • 期刊论文

  • 发表日期：

    2025年1月17日

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  • Priyanka Kumari,
  • Bhawana Pathak

摘要

The industrial revolution has caused significant toxic metal contamination in the coastal ecosystem, particularly in emerging nations. Recently, mangroves have garnered global attention due to their toxicity, incapacity to decompose, abundance, consequent bioaccumulation, and trophic level-dependent biomagnification. This study intends to examine the pollution levels and toxic metal content in mangrove surface silt and plants in the Purna River Estuary (Navsari). The findings indicate that harmful metal levels in the sediments exceed the background values of natural, suggesting anthropogenic sources. This research emphasizes the assessment and evaluation of mangrove species across the Gulf of Khambhat to identify the adverse effects of climate change, urbanization / Industrialization, and adaptation mechanisms in selected mangrove species. Among all the heavy metals analyzed, the concentration was found to be highest for Fe > Mn > Sr > Ti > Cr. Contamination indices such as enrichment factors, accumulation index, and contamination factors were highest in Ni and Cr metals. Approximately 42.85% of all the sites found considerable contamination. Additionally, four mangrove plant species were selected for assessing heavy metal bioaccumulation. The highest bioaccumulation was observed in Avicenna marina, followed closely by with Bruguiera cylindrica, Acanthus ilicifolius, and Sonneratia apetala. In these plants, highest bioaccumulation concentration of Cu > Zn > Sr > Mn were detected across all the selected sites.