Study on Urban Trees in Ekiti State University, Ado Ekiti, Nigeria: 1. Structure and Composition

Iyanuoluwa Kikelomo Ajayi, Joshua Kayode, Benson Oluwafemi i Ademiluy


An inventory of tree biodiversity was carried in Ekiti State University, Ado-Ekiti, Nigeria, which is an institution where ecological and economic roles of trees are disseminated. The study involved the use of a stratified sampling technique to carry out a survey of trees species in the University. The campus was divided into four strata - Road side (A), Car parks (B), Office area (C), Student halls/ religion area (D) - and each stratum was further sub-divided into sub-strata. All the trees within each sub-stratum were identified to species level with their scientific, local and family names and they were counted and recorded. The relative frequency, relative density and relative abundance of the identified species were determined. Similarities indices and indices of diversity were determined on the tree species sampled among the strata. The results obtained revealed that a total of 27 tree species, belonging to 17 families were sampled in the campus. The family Caesalpiniaceae has the highest number of species. Some of the identified tree species were found in multiple and dual strata while some occurred in only one stratum. A total of 838 tree individuals were obtained. The most frequently occurring species were T. grandis, G. arborea and P. longifolia with 298, 181 and 149 individuals respectively. The indices of similarities among the strata were low. However Strata A and B as well as A and C appeared to be similar in tree composition. Strategies that would improve and maintain tree composition in the University campus were proposed


Urban trees; university; structure; composition

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Adeboye, O. A. and Adedayo, A. (2008). “Nigeria under Exploited Indigenous Fruits Vegetables in Era of Climate Change. A Review of Scientific Literature”. Pp: 1-4

Ayeni, J.M. and Kayode, J. (2008).”Survey of Homestead Trees in Ado – Ekiti Region of South Western Nigeria”. Bulletin of Pure and Applied Sciences 27B (1 & 2): 45-55. Ayo F. (2013). “Economic Botany”. Keynotes Publishers Limited, Nigeria. 131p.

Bolaji-Olutunji K. A., Adebagbo, C. A., and Tolawo, O. A. (2008). “Enviromental degradation and sustainable food security in Nigeria”. Journal of Agriculture, Forestry and Social Sciences, 6(2).

Beckett, K.P., Freer-Smith, P.H., and Taylor, G. (2000). “The Capture of Particulate Pollution by Trees at five Contrasting Urban Sites”. Arboriculture Journal. (24):209-230.

Bongers, F., Popma, J., Meave del Castilo, J. and Carabias, J. (1988). “Structure and

Floristic Composition of the Lowland Rain Forest of Los Tuxtlas”. Vegetation 74, 55-80.

Cummins, S. K, and Jackson, R. J. (2001). “The built environment and children's health”

Pediatric Clinics of North America 48(5): 1241–1252.

Dodet, M. and Collet, C. (2012). “When should exotic forest plantation tree species be considered as an invasive threat and how should we treat them?” Biological Invasions 14(9):1765-1778.

EarthTalk (2016). “Why Can't We Plant Trees in Highway Medians?”

Escobedo, F.J., Kroeger, T., Wagner, J.E. (2011). “Urban forests and pollution mitigation: Analyzing ecosystem services and disservices”. Environmental Pollution (159):2078-2087.

Escobedoa, F.J. and Nowak, D.J. (2009). “Spatial Heterogeneity and Air Pollution Removal by an Urban Forest”. Landscape and Urban Planning (90):102–110.

Gurevitch, J., Scheiner, S. M. and Fox, G. A. (2002). “The ecology of Plants” Sinauer

Associates Inc., Sunderland, MA.

Handy, S., Boarnet, M., Ewing, R. and Killingsworth, R. (2002). “How the built environment affects physical activity”. American Journal of Preventive Medicine23(2):64–73.

Hansmann, R., Hug, S. M. and Seeland, K. (2007). “Restoration and stress relief through physical activities in forests and parks.” Urban Forestry & Urban Greening 6(4): 213–225.

Hartig, T., Evans, G. W., Jamner, L. D., Davis, D.S. and Gärling, T. (2003). “Tracking restoration in natural and urban field settings.” Journal of Environmental Psychology. 2003; 23:109–123.

Iheyen, J., Okoegwale, E.E., and Mensah, J.K. (2009). “Composition of Tree Species in Ehor Forest Reserve, Edo State, Nigeria.” Nature and Science 7(8): 8 - 18.

Ihimikaiye, S.O. and Tanee, F. B. G. (2014). “Impacts of the Interaction of two links.” Landscape and Urban Planning 97(4): 273–282.

Nowak, D.J., Crane, D.E, Stevens, J.C. (2006a). “Air Pollution Removal by Urban Trees and Shrubs in the United States.” Urban Forestry and Urban Greening 4:115-123.

Oba, G., Nordal, I., Stenseth, N. C., Stave, J. Bjorå, C. S., Muthondeki, J.K. Bii, W. K. A. (2001). “Growth performance of exotic and indigenous tree species in saline soils in Turkana, Kenya.” Journal of Arid Environments 47(4), 499-511.

Obembe, M. O. and Kayode, J. (2019). “Evaluation of the Insecticidal Properties of Cassia alata L. against Cowpea Weevil, Callobruchus maculatus Fab.(Coleoptera: Bruchidae).” Budapest International Journal in Exact Sciences 1 (4), 84-92. DOI:

Oladehinde, R, G, (2016). “Lagos, tree planting and the environment.” The Guardian, 30 July 2016.

Parsons, R.,. Tassinary, L. G., Ulrich, R.S., Hebl, M.R. and Grossman-Alexander, M. (1998).” The View From the Road: Implications for Stress Recovery and Immunization.” Journal of Environmental Psychology 18, 2:113–140.

Park, B. J., Furuya, K., Kasetani, T, Takayama N., Kagawa, T. and Miyazaki, Y. (2011).

“Relationship between psychological responses and physical environments in forest

settings.” Landscape and Urban Planning 102(1): 24–32.

Patel, H.R, and Patel, R.S. (2013). “Ethnobotanical of Plant used by the Tribes of R.D.F. Poshina Forest range of Sabaekantha District, North Gujarat, India.” International Journal of Scientific and Research Publications 3(2):2250-3153.

Pretty, J., Peacock, J., Sellens, M. and Griffin, M. (2005). “The mental and physical health outcomes of green exercise.” International Journal of Environmental Health Research 15(5): 319–337. doi: 10.1080/09603120500155963

Salbitano, F., Borelli, S., Conigliaro, M. and Chen, Y. (2016). “Guidelines on urban and peri-urban forestry” FAO Forestry Paper No. 178. Food and Agriculture Organization of the United Nations, Rome, 172pp.

Shah, A. (2014). “Why Is Biodiversity Important? Who Cares?”

Singh, J.S. (2002). “The Biodiversity Crisis: A Multifaceted Review.” Current Science, 82:638-647.

Sivarajah, S., Smith, S. M. and Thomas, S. C. (2018). “Tree cover and species composition effects on academic performance of primary school students. PloS ONE 13(2): e0193254.

Soladoye, O. and Oromakinde, O. O. (2013). “Assessment of Tree Planting Efforts in Lagos Island Local Government Area of Lagos State, Nigeria.” Environment and Natural Resources Research 3 (4): 12-18.

Takano, T., Nakamura, K. and Watanabe, M. (2002). “Urban residential environments and senior citizens’ longevity in megacity areas: the importance of walkable green spaces.” Journal of Epidemiology and Community Health . 56: 913–918.

Taylor, A. F., Kuo, F. E. and Sullivan, W. C. (2001). Coping with ADD the surprising

connection to green play settings. Environment & Behavior 33(1): 54–77.

Villeneuve, P. J., Jerrett, M., Su, J. G., Burnett, R. T., Chen, H., Wheeler, A. J. and Goldberg, M. S. (2012). “A cohort study relating urban green space with mortality in Ontario, Canada.” Environmental Research 115:51–58. doi: 10.1016/j.envres.2012.03.003

Wolf, K.L. (2006). “Roadside Urban Trees: Balancing Safety and Community Values.”

Arborist News 15 (6): 56-58.

Wu, C., McNeely, E., Cedeño-Laurent, J. G., Pan, W., Adamkiewicz, G. and Dominici, F. (2014). “Linking student performance in Massachusetts elementary schools with the “greenness” of school surroundings using remote sensing.” PLoS ONE. 9(10): e108548 doi: 10.1371/journal.pone.0108548

Yanga, J., mcbridea, J., Zhoub, J., and Sunb, Z. (2005). “The Urban Forest in Beijing and its role in Air Pollution Reduction.” Urban Forestry & Urban Greening 3: 65–78.


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