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<p>Vegetation plays a significant role in the regulation of homeostasis in an ecosystem. This study assessed the ecosystem services and disservices of street trees in thirteen heavily polluted corridors of Thiruvananthapuram, Kerala, using the i-Tree Eco Model. The results indicated that the avenue trees stored approximately 1016.15 metric tons of carbon, with an annual carbon sequestration of 25.69 tons. <i>Peltophorum pterocarpum</i> emerged as the dominant species in these areas. <i>Eucalyptus</i> sp. and <i>Albizia saman</i> were deemed more suitable for less disturbed areas, such as green belts and wastelands, due to their higher disservice profile. In contrast, <i>Ailanthus</i> sp., <i>Tamarindus indica</i>, and <i>Swietenia mahagoni</i> provided significant ecosystem benefits with minimal Volatile Organic Compound (VOC) emissions. Statistical analysis revealed significant positive correlations (<i>p</i> &lt; 0.05) among variables like, tree density, carbon storage, carbon sequestration, avoided runoff and VOC release. Carbon storage and avoided runoff had the highest correlation (<i>r</i> = 0.97), indicating the influence of allometric canopy cover on surface runoff reduction. The lowest correlation (<i>r</i> = 0.66) was between tree density and carbon storage which depicted the impact of tree diameter over tree population in the enhancement of biomass. Spatial analysis further emphasized the benefits of species diversity over monocultures in mitigating abiotic stressors, like air pollutants.</p>

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Studies on ecosystem services and air-pollution mitigation in tropical urban vegetation using i-Tree Eco Model

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • Ancy S. Watson,
  • R. Sudha Bai

摘要

Vegetation plays a significant role in the regulation of homeostasis in an ecosystem. This study assessed the ecosystem services and disservices of street trees in thirteen heavily polluted corridors of Thiruvananthapuram, Kerala, using the i-Tree Eco Model. The results indicated that the avenue trees stored approximately 1016.15 metric tons of carbon, with an annual carbon sequestration of 25.69 tons. Peltophorum pterocarpum emerged as the dominant species in these areas. Eucalyptus sp. and Albizia saman were deemed more suitable for less disturbed areas, such as green belts and wastelands, due to their higher disservice profile. In contrast, Ailanthus sp., Tamarindus indica, and Swietenia mahagoni provided significant ecosystem benefits with minimal Volatile Organic Compound (VOC) emissions. Statistical analysis revealed significant positive correlations (p < 0.05) among variables like, tree density, carbon storage, carbon sequestration, avoided runoff and VOC release. Carbon storage and avoided runoff had the highest correlation (r = 0.97), indicating the influence of allometric canopy cover on surface runoff reduction. The lowest correlation (r = 0.66) was between tree density and carbon storage which depicted the impact of tree diameter over tree population in the enhancement of biomass. Spatial analysis further emphasized the benefits of species diversity over monocultures in mitigating abiotic stressors, like air pollutants.