Whispers in the mangroves: Unveiling the silent impact of potential toxic metals (PTMs) on Indian Sundarbans fungi.

IF 5.3 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Marine pollution bulletin Pub Date : 2024-11-21 DOI:10.1016/j.marpolbul.2024.117233

Shouvik Mahanty, Kirthana Pillay, Emilie A Hardouin, Demetra Andreou, Marin Cvitanović, Gopala Krishna Darbha, Sukhendu Mandal, Punarbasu Chaudhuri, Santanu Majumder

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Abstract

This study investigates sediment samples from the Indian Sundarbans' mangrove habitat, where most samples were alkaline and hypersaline, except for one acidic sample. Elemental analysis revealed poor sediment quality, with elevated Enrichment Factors (2.20-9.7), Geo-accumulation indices (-2.19-1.19), Contamination Factors (0.61-3.18), and Pollution Load Indices (1.04-1.32). Toxic metal ions, including Pb, Cu, Ni, Cd, Zn, and Cr, were identified as key contributors to compromised sediment quality. These metals inhibit crucial sediment enzymes, such as CMC-cellulase, β-glucosidase, aryl sulfatase, urease, and phosphatases, essential for nutrient cycling and organic matter decomposition. A negative correlation was found between heavy metals and biodiversity, as indicated by the Shannon index, and a similar trend was observed with fungal load. The study highlights the adverse effects of persistent trace metals on the fungal community, potentially disrupting the mangrove ecosystem and suggests using manglicolous fungi as biological indicators of environmental health.

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红树林中的低语：揭示潜在有毒金属 (PTM) 对印度孙德尔本斯真菌的无声影响。

本研究调查了印度孙德尔本斯红树林栖息地的沉积物样本，除一个酸性样本外，大多数样本都呈碱性和高碱性。元素分析表明，沉积物质量较差，富集因子（2.20-9.7）、地质累积指数（-2.19-1.19）、污染因子（0.61-3.18）和污染负荷指数（1.04-1.32）均有所升高。有毒金属离子（包括铅、铜、镍、镉、锌和铬）被认为是导致沉积物质量下降的主要因素。这些金属会抑制关键的沉积物酶，如 CMC-纤维素酶、β-葡萄糖苷酶、芳基硫酸酯酶、脲酶和磷酸酶，而这些酶对于养分循环和有机物分解至关重要。根据香农指数，重金属与生物多样性呈负相关，真菌负荷也呈类似趋势。该研究强调了持久性痕量金属对真菌群落的不利影响，可能会破坏红树林生态系统，并建议将红树林真菌作为环境健康的生物指标。

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来源期刊

Marine pollution bulletin 环境科学-海洋与淡水生物学

CiteScore

10.20

自引率

15.50%

发文量

1077

审稿时长

68 days

期刊介绍： Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.