Abstract
Toxic metal pollution in bodies of water is a source of danger to the health of people living in developing countries. The untreated mine wastes located near some Chinese ore mines may cause water pollution, which ultimately results in various diseases. The aim of the present study is to assess the response of testate amoebae communities to pollution by toxic metals in groundwater, stream water, and aquatic bryophytes in Lanmuchang stream located in the Hg–Tl mineralized area in southwestern Guizhou Province, China. Measurements were made of the levels of Hg, As, Cd, Tl, Cu, Zn, and Pb in three mosses: Hyophila propagulifera, Rhynchostegium riparioides, and Hygroamblystegium tenax. Mean moss concentrations of Hg, As, Cu, Pb, and Zn were significantly higher than stream water values and testate amoebae species richness and abundance were significantly lower in the ‘polluted’ group. We then studied the correlation between toxic metals and testate amoebae. The total species abundance is correlated negatively to Hg and Cu concentrations. Our results indicated that testate amoebae are sensitive to toxic metal pollution and aquatic bryophytes are bioaccumulators of trace metals, and results also showed potential microecosystem health risks.
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Yang, ZC., Wang, ZH. & Zhang, ZH. Biomonitoring of testate amoebae (protozoa) as toxic metals absorbed in aquatic bryophytes from the Hg-Tl mineralized area (China). Environ Monit Assess 176, 321–329 (2011). https://doi.org/10.1007/s10661-010-1585-2
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DOI: https://doi.org/10.1007/s10661-010-1585-2