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<p>In heterogeneous mountainous landscapes, urban green spaces (UGS) are crucial in sustaining ecosystem services. This study evaluates the roles of different UGS across three sectors (educational institution, public parks and government complex) in supporting biodiversity conservation and carbon (C) storage in Aizawl, a high-altitude ridgeline city in the Eastern Himalaya. A total of 103 woody tree species belonging to 76 genera and 38 families were recorded across the surveyed UGS, with a mean richness of 22.57 ± 1.85 species per site. Quadrat-level comparisons indicated that public parks had higher species richness (<i>p</i> &lt; 0.05) and lower dominance, suggesting greater local compositional evenness than the other UGS sectors. Public parks also tended to exhibit descriptively higher aboveground biomass (AGB) and C storage, likely associated with greater basal area, tree-size structure, and stand maturity. In contrast, the sampled government complex showed relatively lower AGB and C storage, possibly reflecting site-specific planting history, variable management practices, and uneven stand development. Results further indicated that species dominance patterns appeared to be influenced by sector-specific management practices and species selection. The presence of multiple threatened and conservation-relevant species, such as <i>Canarium strictum</i>, <i>Phoebe bootanica</i>, <i>Tectona grandis</i>, <i>Cinnamomum verum</i>, and <i>Mesua ferrea</i> in the UGS reveals their importance for conservation of regionally significant woody flora. The study recommends scientifically informed management of UGS for biodiversity conservation and enhancement of ecosystem services in the fragile landscapes of Aizawl city.</p>

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Woody composition, structure, and carbon storage potential of urban green space across sectors in a high-altitude ridgeline city, Aizawl, Eastern Indian Himalaya

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Paul Lalremsang,
  • Lalruatliana Khawlhring,
  • Demsai Reang,
  • Uttam Kumar Sahoo,
  • Pushkal Baghchie

摘要

In heterogeneous mountainous landscapes, urban green spaces (UGS) are crucial in sustaining ecosystem services. This study evaluates the roles of different UGS across three sectors (educational institution, public parks and government complex) in supporting biodiversity conservation and carbon (C) storage in Aizawl, a high-altitude ridgeline city in the Eastern Himalaya. A total of 103 woody tree species belonging to 76 genera and 38 families were recorded across the surveyed UGS, with a mean richness of 22.57 ± 1.85 species per site. Quadrat-level comparisons indicated that public parks had higher species richness (p < 0.05) and lower dominance, suggesting greater local compositional evenness than the other UGS sectors. Public parks also tended to exhibit descriptively higher aboveground biomass (AGB) and C storage, likely associated with greater basal area, tree-size structure, and stand maturity. In contrast, the sampled government complex showed relatively lower AGB and C storage, possibly reflecting site-specific planting history, variable management practices, and uneven stand development. Results further indicated that species dominance patterns appeared to be influenced by sector-specific management practices and species selection. The presence of multiple threatened and conservation-relevant species, such as Canarium strictum, Phoebe bootanica, Tectona grandis, Cinnamomum verum, and Mesua ferrea in the UGS reveals their importance for conservation of regionally significant woody flora. The study recommends scientifically informed management of UGS for biodiversity conservation and enhancement of ecosystem services in the fragile landscapes of Aizawl city.