Vegetation change significantly altered the hydrological processes and soil erosion within riparian ecosystems. It is unclear how change in managed vegetation types affect the geochemical behavior of heavy metals (HMs) and magnetic particles in karst riparian areas. Two soil depths of 0-20 cm and 20-40 cm were taken in alien species (), native species and in a typical urban plateau Lake wetland, Caohai lake, China. Low-frequency mass magnetic susceptibility (χ), anhysteretic remanent susceptibility (χ), isothermal remanent magnetization, Cd, Cr, Cu, Sb, Ni and Zn were determined. Compared with and habitat had the higher values of HMs, χ, χ, and isothermal remanent magnetization in top-soils. Frequency-dependent magnetic susceptibility ranged from 4.84 % to 10.87 % in top-soils and 6.82 %-9.95 % in sub-soils, lithogenic/pedogenic factors mainly masked the contribution of anthropogenic factors to magnetic signal enhancement. The correlation between variations of Cu and Sb with χ and isothermal remanent magnetization was found to be significant in top-soils, but not in sub-soils. tended to promote the enrichment of HMs and enhancement of magnetic signal, the impact of expansion on the distribution of soil HMs and magnetic particles in Caohai riparian wetland should be not disregarded.
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| http://dx.doi.org/10.1016/j.heliyon.2024.e41528 | DOI Listing |
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