Role of Campus Green in Climate Change Mitigation

This research was conducted to assess the role of ornamental trees in mitigating climate change within the Rivers State University campus. Stratified random sampling technique was used to collect data on tree height and DBH using D-tape and clinometer. The allometric method was used to calculate the carbon the above and below ground biomass estimated from tree height and DBH. Terminalia superba, Casuarina equisetifolia and Gmelina arborea had the highest mean height of 48.24m, 40.54m and 33.66, while Monoon longifolium and Terminalia irvorensis had the least height of 29.93m and 21.49 respectively. Terminalia superba, Casuarina equisetifolia and Gmelina arborea had the highest mean diameters of 145.83cm, 90.66cm and 78.43m, while Monoon longifolium and Terminalia irvorensis recorded DBH of 58.47cm and 43.42cm. The above ground biomass was 155164.98, 50557.65 and 31283.69 tons for Terminalia superba, Casuarina equisetifolia and Gmelina arborea, while Monoon longifolium and Terminalia irvorensis recorded 15047.95 and 6150.91 tons. Terminalia superba, Casuarina equisetifolia and Gmelina arborea recorded the highest below ground biomass of 186197.96, 60669.18 and 37540.43 tons respectively and sequestered the highest carbon 206427.60, 67260.63 and 41619.05 tons respectively. This research has provided evidence on the potential of ornamental trees in mitigating climate change in the Rivers State University campus. Hence, urban planners and policy makers should incorporate trees such as Terminalia superba, Casuarina equisetifolia and Gmelina arborea in campus landscaping programs to serve dual purpose of aesthetics, climate amelioration and mitigation.

Carbon Sequestration; Ornamental Trees; Climate Mitigation

1. Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (2010). Crop evapotranspiration: Guidelines for computing crop water requirements. FAO Irrigation and Drainage Paper No. 56. Food and Agriculture Organization of the United Nations. [Google Scholar] [Crossref]

2. Afzal, M., & Akhtar, A. M. (2013). Factors affecting carbon sequestration in trees. Journal of Agricultural Research, 51(1), 61-69. [Google Scholar] [Crossref]

3. Aladesanmi, D. A. & Jonathan C. O. (2020). Tree species diversity, volume yield, biomass and carbon sequestration in urban forests in two Nigerian cities. Springer Science+Business Media, LLC, part of Springer Nature (23) 23 957-970. DOI: 10.1007/s11252-020-00994 [Google Scholar] [Crossref]

4. Białecki, R. & Stanek, W., (2017). Cumulative Green-House Gases (GHG) Emissions as Total Measure of Global Warming Potential. Thermodynamics for Sustainable Management of Natural Resources; Springer: Berlin, Germany. 473–488. [Google Scholar] [Crossref]

5. Brady, N. C., & Weil, R. R. (2016). The nature and properties of soils (15th ed.). Pearson Education. [Google Scholar] [Crossref]

6. Brown, S., 1997. Estimating biomass and biomass change of tropical forests. (ForestResources Assessment Publication. Forestry Papers 134). FAO, Rome. [Google Scholar] [Crossref]

7. Chavan, B. L., & Rasal, G. B. (2010). Sequestered Standing Carbon Stock in Selective Tree Species Grown in University Campus at Aurangabad, Maharashtra, India. International Journal of Engineering Science and Technology. 2, 3003-3007. [Google Scholar] [Crossref]

8. Chavan, B., & Rasal, G. (2012). Total Sequestered Carbon Stock of Mangifera indica. Journal of Environment and Earth Science, 2. [Google Scholar] [Crossref]

9. Clark, A. (Alexander) III, Saucier, J. R., & McNab, W. H. (1986). Total-tree weight, stem weight, and volume tables for hardwood species in the Southeast. Georgia Forestry Commission, Research Division. [Google Scholar] [Crossref]

10. Eneji, I. S., Ofoegbu Obinna., and Emmanuel T. Azua (2014). Sequestration and Carbon Storage Potential of Tropical Forest Reserve and Tree Species Located Within Benue State of Nigeria. Journal of Geoscience and Environment Protection. 2, 157-166. [Google Scholar] [Crossref]

11. Escobedo, F. J., Kroeger, T., & Wagner, J. E. (2011). “Urban forests and pollution mitigation: Analyzing ecosystem services and disservices. Environmental Pollution, 159(8-9), 2078-2087. DOI: 10.1016/j.envpol.2011.01.010 [Google Scholar] [Crossref]

12. Ezekiel, M. E; Meilby, H.; & Treue, T. (2014). Volume and Aboveground Biomass Models for Dry Miombo Woodland in Tanzania. International Journal of Forestry Research, 2014, Article ID 531256, 11 pp. https://doi.org/10.1155/2014/531256 [Google Scholar] [Crossref]

13. Hawthorne, W.D & Abu-Juam, M (1993). Forest Protection in Ghana. Glnd, Cambridge IUCN. 203 [Google Scholar] [Crossref]

14. IPCC. (2019). Climate change and land: An IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. Intergovernmental Panel on Climate Change. [Google Scholar] [Crossref]

15. IPCC. (2022). Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [H.-O. Pörtner, D. C. [Google Scholar] [Crossref]

16. Roberts, M. Tignor, E. S. Poloczanska, K. Mintenbeck, A. Alegría, M. Craig, S. Langsdorf, S. Löschke, V. Möller, A. Okem, B. Rama (Eds.)]. Cambridge University Press. https://doi.org/10.1017/9781009325844 [Google Scholar] [Crossref]

17. Jim, C. Y., & Chen, W. Y. (2009). Ecosystem services and valuation of urban forests in China. Cities, 26(4), 187-194. https://doi.org/10.1016/j.cities.2009.03.00 [Google Scholar] [Crossref]

18. Lal, R. (2004). Soil carbon sequestration impacts on global climate change and food security. Science, 304(5677), 1623–1627. https://doi.org/10.1126/science.1097396 [Google Scholar] [Crossref]

19. Morenike O. O., Ezekiel, A., & Ayorinde, A. (2022). Tree Species Diversity and Carbon Sequestration Potentials of the Trees in the Three Ondo State Owned University Campuses, Southwest, Nigeria. Proceedings of the 8th Biennial Conference of the Forests & Forest Products Society, Held at the Forestry Research Institute of Nigeria, Ibadan, Nigeria. 263-269 [Google Scholar] [Crossref]

20. Nowak, D.J., Crane, D.E., Stevens, J.C., Hoehn, R.E., Walton, J.T., & Bond, J., (2008). A ground-based method of assessing urban forest structure and ecosystem services. Arboriculture and Urban Forestry. 34(6):347358. [Google Scholar] [Crossref]

21. Oliver, C.D. & Larson, B.C. (1990). Forest stand Dynamics (P.467) New York: McGraw-Hill [Google Scholar] [Crossref]

22. Orwa, C., Mutua, A., Kindy, R., Jamnadass R., & Anthony, S. (2009). Agroforestry Database: A Tree Reference and Selection Guide Version 4.0 [Google Scholar] [Crossref]

23. Paladinić, E., Vuletić, D., Martinic, I., Marjanović, H., Indir, K., Benko, M., & Novotny, V. (2009). Forest Biomass and Sequestrated Carbon Estimation According to Main Tree Components on the Forest Stand Scale. Periodicum Biologorum, 111, 459-466. [Google Scholar] [Crossref]

24. Pataki, D. E., Carreiro, M. M., Cherrier, J., Grulke, N. E., Jennings, V., Pincetl, S., … Zipperer, W. C. (2011). Coupling biogeochemical cycles in urban environments: ecosystem services, green solutions, and misconceptions. Frontiers in Ecology and the Environment, 9(1), 27-36. https://doi.org/10.1890/090220 [Google Scholar] [Crossref]

25. Ponce-Hernandez, R., Koohafkan, P., & Antoine, J. (2004). Assessing Carbon Stocks and Modelling Win-win Scenarios of Carbon Sequestration Through Land-use Changes. Food and Agricultural Organization of the United Nations (FAO), Rome, Italy. ISBN 92-5-105168-5. [Google Scholar] [Crossref]

26. Pretzsch, H. (2009). Forest dynamics, growth and yield: From measurement to model. Springer-Verlag. [Google Scholar] [Crossref]

27. Roy, A., Byrne, J., & Pickering, C. (2012). Urban green space, public health, and environmental justice: The challenge of making cities ‘just green enough’. Landscape and Urban Planning, 125, 234-244. https://doi.org/10.1016/j.landurbplan.2012.12.013 [Google Scholar] [Crossref]

28. Samuel N. & Simon A. (2020). Growth perfprmance, Undergrowth diversity and Carbon Sequestration Potentials of Tree Species Stand Combinations, Ghana. Open Journal of Forestry. 10(1) [Google Scholar] [Crossref]

29. Uko, E. D., & Tamunobereton-Ari, I. V. (2013). Variability of climatic parameters in Port Harcourt, Nigeria. Journal of Emerging Trends in Engineering and Applied Sciences, 4(5), 727-730. [Google Scholar] [Crossref]

30. Ulolo, M. B., Simbi-Wellington, W. S., & Nnadi, P. C. (2025). Carbon sequestration potential of selected ornamental trees in Isaac Boro Park, Port Harcourt. International Journal of Agriculture and Environmental Research (IJAER), 11(1), 142–152. Available at: https://ijaer.in/carbon-sequestration-potential-of-selected-ornamental-trees-in-isaac-boropark-port-harcourt [Google Scholar] [Crossref]

31. United Nations. (2020). What is climate change? United Nations Climate Action. Retrieved from https://www.un.org/en/climatechange/what-is-climate-change [Google Scholar] [Crossref]

32. World Meteorological organization (WMO, 2022). Greenhouse gas Bulletin-No. 17. Accessed at https://library.wmo.int/index.php?lvl=notice_display&id=21975 [Google Scholar] [Crossref]

33. Zhou, T.; Roorda, M.J.; MacLean, H.L.; Luk, J. (2017). Life cycle GHG emissions and lifetime costs of mediumduty diesel and battery electric trucks in Toronto, Canada. Transp. Res. Part D Transp. Environ. 55, 91– 98. [Google Scholar] [Crossref]

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