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To elucidate the diversity characteristics of riparian plant communities in mountainous rivers, this study conducted field surveys and diversity analyses across nine sampling plots along Dicun Creek, a headwater tributary of the Jiulong River. Using Two-way Indicator Species Analysis (TWINSPAN) and Detrended Correspondence Analysis (DCA), we examined the relationship between plant communities and environmental factors. The results revealed 66 herbaceous species from 28 families and 52 genera in the riparian zone, with dominant families including Poaceae (16.67%), Polygonaceae (9.09%), Asteraceae (9.09%), Cyperaceae (9.09%), and Thelypteridaceae (6.06%). Fourteen distinct plant associations were identified, with Miscanthus sinensis + Dicranopteris dichotoma (11 plots) and Indocalamus longiauritus (10 plots) being the most widespread. Species richness ranged from 10 to 19, Shannon-Wiener diversity from 1.12 to 1.85, Simpson dominance from 0.41 to 0.75, and Pielou evenness from 0.95 to 1.09. DCA ordination highlighted altitude, slope, soil texture, and moisture as key drivers of community composition. These findings provide critical insights for restoring riparian ecosystems in mountainous regions, emphasizing the need to integrate environmental gradients into conservation strategies.

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Quantitative Analysis of Riparian Herbaceous Plant Communities in Mountainous Rivers: A Case Study of Dicun Creek, Jiulong River Source Area

  • 会议论文

  • 发表日期：

    2026年

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  • Rong Sun,
  • Xiaojie Luo,
  • Xiang Luo,
  • Yanyao Chen,
  • Shixiu Luo

摘要

To elucidate the diversity characteristics of riparian plant communities in mountainous rivers, this study conducted field surveys and diversity analyses across nine sampling plots along Dicun Creek, a headwater tributary of the Jiulong River. Using Two-way Indicator Species Analysis (TWINSPAN) and Detrended Correspondence Analysis (DCA), we examined the relationship between plant communities and environmental factors. The results revealed 66 herbaceous species from 28 families and 52 genera in the riparian zone, with dominant families including Poaceae (16.67%), Polygonaceae (9.09%), Asteraceae (9.09%), Cyperaceae (9.09%), and Thelypteridaceae (6.06%). Fourteen distinct plant associations were identified, with Miscanthus sinensis + Dicranopteris dichotoma (11 plots) and Indocalamus longiauritus (10 plots) being the most widespread. Species richness ranged from 10 to 19, Shannon-Wiener diversity from 1.12 to 1.85, Simpson dominance from 0.41 to 0.75, and Pielou evenness from 0.95 to 1.09. DCA ordination highlighted altitude, slope, soil texture, and moisture as key drivers of community composition. These findings provide critical insights for restoring riparian ecosystems in mountainous regions, emphasizing the need to integrate environmental gradients into conservation strategies.