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Responses of acrocarpous moss communities to heavy metal (Fe, Mn, Cd) and sulfur pollution in the Changgou carbonate manganese ore, SW China

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Abstract

Bryophyte communities have been widely used to monitor and assess heavy metal pollution in soil, air and water. However, the unique value of acrocarpous moss in monitoring environmental pollution and the harm of non-metallic sulfur to human health caused by carbonate manganese mining were seldom considered in previous studies. This study investigated the heavy metal and sulfur pollution level by soil and moss sample collection in Changgou manganese ore and its surrounding environment in the Zunyi area, Guizhou Province, China. By means of cluster analysis, diversity analysis, correlation analysis and redundancy analysis, the relationship between dominant moss communities and major pollutants were analyzed. The results showed that there were pollutants such as iron (Fe), manganese (Mn), cadmium (Cd), sulfur (S) and others in the 500 meters buffer zone centered on Changgou manganese ore. The ore sorting area and waste rock accumulation area were considered as the most seriously polluted, followed by the ore outlet area and ore transport line, at last the miners’ living area and vegetable planting area were the least polluted. A total of 23 species of moss communities were identified in the Changgou manganese ore area, among which 9 were dominant, including Bryum blindii Bruch & Schimp. (Bry.bli), Weissia planifolia Dix (Wei.pla) — Bry.bli, Bryum caespiticium Hedw. (Bry.cae), Bryum pallescens Schleicher ex Schwägr. (Bry.pal), Didymodon longicostatus X. J. Li et Iwats (Did.lon), Weissia brachycarpa (Nees & Hornsch.) Jur. (Wei.bra), Trichostomum brachydontium Bruch. (Tri.bra), Bryum argenteum Hedw. (Bry.arg) Wei.bra and Bryum algovicum Sendt.ex Műll. Hal. (Bry.alg), all of which are from the acrocarp species. Bry.cae showed a strong tolerance to S, Did.lon to Fe, Bry.pal to Cd and Bry.bli to Mn. There was a significant correlation between the main polluting elements and the dominant bryophyte community (P<0.05), indicating a high biological indicator value. Together, our results can provide the scientific basis for soil pollution monitoring and human health risk assessment in carbonate manganese mining areas.

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Acknowledgments

This research was supported by the National Nature Science Foundation of China (No.31960044) and the Department of Science and Technology Foundation of Guizhou Province, China [DSTFGC, (2019)]. We are deeply grateful to the Key Laboratory for the Information System of Mountainous Area and the Protection of Ecological Environment of Guizhou Province for providing experiment instruments. Thanks to Professor Zhihui Wang for his language help. Thanks to Lu Dan and Xu Sheng for helping to collect samples in the field.

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Correspondence to Zhao-hui Zhang.

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Han, Jh., Zhang, Zh. & Wang, Zh. Responses of acrocarpous moss communities to heavy metal (Fe, Mn, Cd) and sulfur pollution in the Changgou carbonate manganese ore, SW China. J. Mt. Sci. 19, 1292–1306 (2022). https://doi.org/10.1007/s11629-021-7023-9

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  • DOI: https://doi.org/10.1007/s11629-021-7023-9

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