Data Sheet 1_Structure, ecosystem services and economic evaluation of native tree diversity: a case study of the restored Aravalli Biodiversity Park, Delhi, India.pdf

IntroductionTree diversity is important for maintaining environmental quality in tropical urban forests, but the composition, structure, and functional roles of these ecosystems are not yet fully understood. Urban blue-green spaces are gaining recognition for their ability to boost biodiversity and mitigate climate change. This study evaluates the diversity, structural features, and ecosystem services of the regenerated forest ecosystem in Delhi’s Aravalli Biodiversity Park, India.
MethodsA vegetation assessment was carried out over a 500-acre area using 83 quadrats (10 × 10 m). A total of 829 native trees from 80 species were recorded. Phytosociological parameters such as Relative frequency, Relative density, Relative dominance, and Importance Value Index (IVI) were calculated to assess community structure. Growth attributes, including diameter at breast height (DBH), tree height, crown base height, crown width, and crown light exposure, were measured and analysed in relation to functional parameters such as carbon storage and sequestration.
ResultsThe study revealed high species richness, evenness, and diversity, indicating a stable and well-balanced ecosystem. Phytosociological analysis showed a complex forest structure with diverse habitats. Growth parameters varied among species but were strongly interrelated. DBH, tree height, and crown width showed strong positive correlations with carbon storage and sequestration. The park contains approximately 202,100 trees, storing about 8,360 Mg carbon valued at Rs.11.34 crores. These trees sequester about 1,236 Mg C yr-1, prevent nearly three million litres of surface runoff, aiding groundwater recharge, and remove 126.89 Mg of air pollutants, providing benefits worth approximately Rs.1.89 crores.
DiscussionThese findings highlight the ecological and economic value of restored tropical urban forests. Diverse and structurally complex green spaces, such as the Aravalli Biodiversity Park, play a significant role in climate change mitigation, pollution reduction, and sustainable urban environmental management.