Fatimah Hina, Farooq Saba, Anwar Tauseef, Qureshi Huma, Hashmi Fasih, Ahmad Tauqeer, Ullah Naimat, Munazir Mehmooda, Naseem Muhammad Tahir, Soufan Walid
Department of Biology, Allama Iqbal Open University, Islamabad, 44310, Pakistan.
Department of Botany, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
BMC Plant Biol. 2024 Dec 19;24(1):1199. doi: 10.1186/s12870-024-05935-3.
This study assessed the growth, biomass, and carbon storage potential of four urban tree species-Pinus roxburghii, Broussonetia papyrifera, Jacaranda mimosifolia, and Eucalyptus camaldulensis-in Islamabad's greenbelts. Sampling was conducted using a quadrat method, covering five sites (F-9, G-8, H-8, I-8, Zero-Point), with 400 trees analyzed. Growth parameters such as diameter at breast height (DBH), height, aboveground biomass (AGB), aboveground carbon density (ACD), belowground carbon density (BCD), basal area (BA), and volume were measured. E. camaldulensis recorded the highest AGB (mean: 2.07 t ha⁻¹, range: 0.05-6.54 t ha⁻¹), ACD (mean: 971.43 t ha⁻¹), and BCD (mean: 233.14 t ha⁻¹), along with the largest DBH (mean: 47.31 cm) and height (mean: 20.10 m). B. papyrifera showed significant carbon storage potential, with mean ACD and BCD values of 373.94 t ha⁻¹ and 89.75 t ha⁻¹, respectively. In contrast, J. mimosifolia displayed the lowest mean AGB (0.2493 t ha⁻¹) but showed considerable variability, with DBH ranging from 7.68 to 59.83 cm. P. roxburghii exhibited moderate values, with a mean AGB of 0.45 t ha⁻¹ and ACD of 212.36 t ha⁻¹. Overall, mean AGB, ACD, and BCD across all species were 0.89 t ha⁻¹, 418.73 t ha⁻¹, and 100.49 t ha⁻¹, respectively, while basal area ranged from 12.07 to 154.94 m² ha⁻¹ (mean: 61.84 m² ha⁻¹). Statistical analysis revealed significant positive correlations among DBH, height, and biomass parameters (p < 0.05). The findings underscore E. camaldulensis as the most effective species for urban carbon sequestration, while B. papyrifera demonstrated positive soil fertility implications. Future research should explore long-term ecological impacts and management strategies for these species in urban landscapes.
本研究评估了伊斯兰堡绿化带中四种城市树木——喜马拉雅松、构树、蓝花楹和赤桉的生长、生物量及碳储存潜力。采用样方法进行采样，覆盖五个地点（F - 9、G - 8、H - 8、I - 8、零点），共分析了400棵树。测量了胸径（DBH）、树高、地上生物量（AGB）、地上碳密度（ACD）、地下碳密度（BCD）、断面积（BA）和材积等生长参数。赤桉的地上生物量最高（均值：2.07 t ha⁻¹，范围：0.05 - 6.54 t ha⁻¹）、地上碳密度（均值：971.43 t ha⁻¹）和地下碳密度（均值：233.14 t ha⁻¹），同时胸径最大（均值：47.31 cm）、树高最高（均值：20.10 m）。构树显示出显著的碳储存潜力，地上碳密度和地下碳密度的均值分别为373.94 t ha⁻¹和89.75 t ha⁻¹。相比之下，蓝花楹的地上生物量均值最低（0.2493 t ha⁻¹），但变化较大，胸径范围为7.68至59.83 cm。喜马拉雅松表现出中等数值，地上生物量均值为0.45 t ha⁻¹，地上碳密度为212.36 t ha⁻¹。总体而言，所有树种的地上生物量、地上碳密度和地下碳密度均值分别为0.89 t ha⁻¹、418.73 t ha⁻¹和100.49 t ha⁻¹，断面积范围为12.07至154.94 m² ha⁻¹（均值：61.84 m² ha⁻¹）。统计分析表明胸径、树高和生物量参数之间存在显著正相关（p < 0.05）。研究结果强调赤桉是城市碳固存最有效的树种，而构树对土壤肥力有积极影响。未来研究应探索这些树种在城市景观中的长期生态影响和管理策略。
