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Background and aims <p>Reconstructing shifts in vegetation belts is crucial for comprehending the vegetation response to environmental changes in high mountain regions of inland Asia. Phytoliths offer a novel proxy for palaeovegetation reconstruction, complementing pollen data to enhance reconstruction accuracy in mountainous terrains, but accurate reconstruction requires an understanding how surface soil phytoliths represent their corresponding above-ground plant communities.</p> Methods <p>Phytoliths were extracted from 34 surface soil samples across various elevation-based vegetation belts in the eastern Tianshan Mountains, to assess how well they represent vegetation communities and environmental significance. Differences in phytolith assemblages from surface soil at varying elevations were examined in relation to soil physicochemical properties.</p> Results <p>Surface soil phytoliths in altitudinal vegetation belts of the eastern Tianshan Mountains were classified into 19 morphotypes: <span>Elongate psilate, Trapeziform crenate, Saddle, Blocky irregular</span>, and <span>Lanceolate</span> were predominant. Surface soil phytolith assemblages effectively captured the differences between vegetation types in these belts, although south slope assemblages compared represented surface vegetation better to north slope assemblages. Surface soil phytolith assemblages are influenced by climate, soil physicochemical properties, and other factors, leading to some inaccuracy in their representation of the overlying vegetation.</p> Conclusion <p>Soil phytoliths can differentiate altitudinal vegetation belts. Surface soil phytolith assemblage analysis is a useful tool for past vegetation reconstruction in this region in China.</p>

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Can soil phytoliths accurately discriminate plant communities in high mountain regions? Insights from the eastern Tianshan Mountains, China

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Ao Yan,
  • Qingcao Tian,
  • Jiangyong Wang,
  • Xudong Liu,
  • Nuo Liu,
  • Senbati·Baishanbaike,
  • Zhankui Bai,
  • Guihe Zhang

摘要

Background and aims

Reconstructing shifts in vegetation belts is crucial for comprehending the vegetation response to environmental changes in high mountain regions of inland Asia. Phytoliths offer a novel proxy for palaeovegetation reconstruction, complementing pollen data to enhance reconstruction accuracy in mountainous terrains, but accurate reconstruction requires an understanding how surface soil phytoliths represent their corresponding above-ground plant communities.

Methods

Phytoliths were extracted from 34 surface soil samples across various elevation-based vegetation belts in the eastern Tianshan Mountains, to assess how well they represent vegetation communities and environmental significance. Differences in phytolith assemblages from surface soil at varying elevations were examined in relation to soil physicochemical properties.

Results

Surface soil phytoliths in altitudinal vegetation belts of the eastern Tianshan Mountains were classified into 19 morphotypes: Elongate psilate, Trapeziform crenate, Saddle, Blocky irregular, and Lanceolate were predominant. Surface soil phytolith assemblages effectively captured the differences between vegetation types in these belts, although south slope assemblages compared represented surface vegetation better to north slope assemblages. Surface soil phytolith assemblages are influenced by climate, soil physicochemical properties, and other factors, leading to some inaccuracy in their representation of the overlying vegetation.

Conclusion

Soil phytoliths can differentiate altitudinal vegetation belts. Surface soil phytolith assemblage analysis is a useful tool for past vegetation reconstruction in this region in China.