Ecological, environmental risks and sources of arsenic and other elements in soils of Tuotuo River region, Qinghai-Tibet Plateau.

However, the first and second scientific research work on the QTP did not give much consideration to the permafrost in this region, but our investigation and evaluation of the ecological environment of the Tuotuo River region in the past two years found that the degradation of the permafrost area in this region was intensified, the thickness of the freeze–thaw active layer in the permafrost region increased year by year, the freeze–thaw disaster showed an increasing trend, and there were obvious pollution anomalies in soil As, Pb, Cd and Zn(Gong et al., 2024 ).

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