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<p>Population assessment of a species is essential for understanding present and future status, recognizing possible threats and a guiding step towards conservation effort. In this study, we surveyed the populations ecology of <i>Polygonatum cirrhifolium</i> under different habitats, altitudes and plant communities across Himachal Pradesh, India. For this, we examined phytosociological and morphological characters of 25 populations of <i>P. cirrhifolium</i> from 1300&#xa0;m to 3400&#xa0;m amsl. Its distribution was observed in six districts, under six types of ecological habitats, and 12 plant communities in Himachal Pradesh, India. Based on studies we identified its dominance pattern among the habitats (grassland meadow), altitudinal range (2500–3000&#xa0;m amsl) and communities (Mixed <i>Polygonatum cirrhifolium-Equisetum arvense-Geranium wallichianum</i>). The Lahaul and Spiti district in Himachal Pradesh showed its maximum dominance for phytosociological parameters (density 21.48 Ind./m<sup>2</sup> and abundance 24.44) among all the surveyed populations. To predict the suitability model for <i>P. cirrhifolium</i>, bioclimatic variables, species occurrence data, and the MaxEnt modelling approach were used. The test for calibration models showed the AUC value 0.915 ± 0.053, which falls under a good level of accuracy. The findings suggested that 4.27% of the geographical area is highly suitable for the re-introduction, while 15.7% of the Himachal Pradesh State showed favourable conditions for the survival of <i>P. cirrhifolium</i>. The morphology and phytosociology of <i>P. cirrhifolium</i> were considerably influenced by the altitudinal gradient. As the altitude increases, there was a significant reduction (<i>p</i> &lt; 0.001) in plant height, stem diameter, rhizome length, and rhizome size, whereas the frequency (<i>p</i> &lt; 0.001), density (<i>p</i> = 0.01), abundance (<i>p</i> &lt; 0.01) and IVI (<i>p</i> &lt; 0.05) showed a significant trend with elevation. Based on our findings, it provides a comprehensive information for <i>in-situ</i> and <i>ex-situ</i> conservation of this threatened Himalayan medicinal herb.</p>

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Assessment of population status and distribution modelling of Polygonatum cirrhifolium (Wall.) Royle: an astavarga medicinal plant in the Himachal Pradesh, India

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Foola Devi,
  • Rajat Bhardwaj,
  • Ashok Singh

摘要

Population assessment of a species is essential for understanding present and future status, recognizing possible threats and a guiding step towards conservation effort. In this study, we surveyed the populations ecology of Polygonatum cirrhifolium under different habitats, altitudes and plant communities across Himachal Pradesh, India. For this, we examined phytosociological and morphological characters of 25 populations of P. cirrhifolium from 1300 m to 3400 m amsl. Its distribution was observed in six districts, under six types of ecological habitats, and 12 plant communities in Himachal Pradesh, India. Based on studies we identified its dominance pattern among the habitats (grassland meadow), altitudinal range (2500–3000 m amsl) and communities (Mixed Polygonatum cirrhifolium-Equisetum arvense-Geranium wallichianum). The Lahaul and Spiti district in Himachal Pradesh showed its maximum dominance for phytosociological parameters (density 21.48 Ind./m2 and abundance 24.44) among all the surveyed populations. To predict the suitability model for P. cirrhifolium, bioclimatic variables, species occurrence data, and the MaxEnt modelling approach were used. The test for calibration models showed the AUC value 0.915 ± 0.053, which falls under a good level of accuracy. The findings suggested that 4.27% of the geographical area is highly suitable for the re-introduction, while 15.7% of the Himachal Pradesh State showed favourable conditions for the survival of P. cirrhifolium. The morphology and phytosociology of P. cirrhifolium were considerably influenced by the altitudinal gradient. As the altitude increases, there was a significant reduction (p < 0.001) in plant height, stem diameter, rhizome length, and rhizome size, whereas the frequency (p < 0.001), density (p = 0.01), abundance (p < 0.01) and IVI (p < 0.05) showed a significant trend with elevation. Based on our findings, it provides a comprehensive information for in-situ and ex-situ conservation of this threatened Himalayan medicinal herb.