Volume 5, Issue 2, June 2020, Page: 11-20
Tree Structural Diversity and Yield Prediction Models for Tree Species in Old Oyo National Park, Nigeria
Adesoji Akinwumi Adeyemi, Department of Forest Resources Management, Faculty of Agriculture, University of Ilorin, Ilorin, Nigeria
Hussainat Taiwo Taofeek, Department of Forest Resources Management, Faculty of Agriculture, University of Ilorin, Ilorin, Nigeria
Received: Apr. 14, 2020;       Accepted: Apr. 30, 2020;       Published: Jun. 9, 2020
DOI: 10.11648/j.ajpb.20200502.11      View  325      Downloads  98
Evaluation of structural and species distribution is essential for conservation work. Besides, reliable baseline information is crucial for a sustainable forest management. We assessed forest structure and formulated yield-prediction models for tree species in Old Oyo National Park (OONP). Systematic sampling technique was adopted for the study. Thirty transects of 1000 m-long were laid at 1 km intervals. Four 0.25ha-plots were then alternately laid at 250 m intervals along each transect, and 120 plots were used for the study. Structural parameters including diameters at the base, breast height, middle, merchantable top and tree heights were measured for trees with Dbh ≥10 cm to compute stand density and volume. Data were analysed using descriptive statistics and regression. Species diversity and richness indices were computed using Shannon-Wiener and Margalef’s Indices. Models were assessed using R2 and standard error of estimate (SEE), overall significance of each model was evaluated using F-test. Model validation was done using t-test and bias. Sixty-four tree species in 23 families were encountered with richness and diversity indices of 1.189 and 3.544, respectively. Only one endangered (Pterocarpus erinaceus) and three vulnerable (Afzelia africana, Vitellaria paradoxa and Maranthes agnesis) species were encountered. Burkea africana was the most locally-abundant in the area with a relative density and basal area of 9.3 and 3.058 m2/ha, respectively. Fabaceae was the most-represented family. The best yield-prediction model was of the form: V=27.53 + -21.41logDB + 0.023THT² having R2, SEE and bias values of 90.5%, 0.599 and 0.005, respectively. It is recommended for future predictions.
Structural Diversity, Species Composition, Richness, Yield PredictionReferences
To cite this article
Adesoji Akinwumi Adeyemi, Hussainat Taiwo Taofeek, Tree Structural Diversity and Yield Prediction Models for Tree Species in Old Oyo National Park, Nigeria, American Journal of Plant Biology. Vol. 5, No. 2, 2020, pp. 11-20. doi: 10.11648/j.ajpb.20200502.11
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
FAO (2018): The State of the World’s Forests 2018 - Forest Pathways to Sustainable Development. Rome.
Boboye, O. and Jimoh S. O. (2016). Pattern of Plant Species Diversity in a Dry Forest Ecosystem of Nigeria. Journal of Forestry Research and Management 13: 31-47.
Goettsch, B., Hilton-Taylor, C., and Cruzpinon, G. (2015). High Proportion of Cactus Species Threatened with Extinction. Nation Plants 1: 15142.
Havens, K., Kramer, A. T. and Guerrant, E. O. (2014). Getting Plant Conservation Right (Or Not): the Case of the United States. International journal of Plant Science 175 (3): 10.
Corlett, R. T. and Primack, R. B. (2011). Tropical Rain Forests: an Ecological and Bio-geographical Comparison. 2nd edition. Wiley-Blackwell, Oxford, UK. ISBN: 978-1-444-33255-1. 336pp.
Haase, J., Castagneyrol, B., Cornelissen, J. H. C., Ghazoul, J., Kattge, J., Koricheva, J., Scherer-Lorenzen, M., Morath, S. and Jactel, H. (2015). Contrasting Effects of Tree Diversity on Young Tree Growth and Resistance to Insect Herbivores Across Three Biodiversity Experiments. Oikos 10 (1111): 02090.
Adeyemi, A. A., Ibe, A. E. and Okedinma, F. C. (2015). Tree Structural and Species Diversities in Okwangwo Forest. Cross River State, Nigeria. Journal of Research in Forestry, Wildlife and Environment 7: 36-53.
Adeyemi, A. A., Jimoh, S. O. and Adesoye, P. O. (2013). Assessment of Tree Diversities in Oban Division of the Cross River National Park (CRNP). Nigeria Journal of Agriculture, Forestry and Social Sciences 11 (1): 216-230.
Adeyemi, A. A. (2012). Allometric Equations for Three Members of Olacaceae (R. Br.) Family in a Tropical Rainforest of Nigeria. Journal of Agriculture, Forestry and the Social Sciences 10 (2): 156-167.
Moses, F. and Anthony, K. (2015). Assessment of Trees Species Diversity in Taia Riverine Forest along Njala Community, Moyamba district, Sierra Leone. Journal of Sustainable Environmental Management 7: 11-20.
National Park Service (2010). www.nigeriaparkservice.org.
Mohammed, S. O., Gajere, E. N., Eguaroje, E. O., Shaba, H., Ogbole, J. O., Mangut, Y. S., Onyeuwaoma, N. D. and Kolawole, I. S. (2013). Spatio-Temporal Analysis of the National Parks in Nigeria Using Geographic Information System. Ife Journal of Science 15 (1): 159.
Reddy, S. C. and Ugle, P. (2008). Tree Species Diversity and Distribution Patterns in Tropical Forest of Eastern Ghats, India: A case study. Journal of Life Science 5 (4): 87-93.
FAO (2010): Global Forest Resources Assessment (2005 and 2010) and the State of the World’s Forests. Food and Agricultural Organization of the United Nations. Rome, Italy.
Bello, A. G., Isah, A. D. and Ahmad, B. (2013). Tree Species Diversity Analysis of Kogo Forest Reserve in North-Western, Nigeria. International Journal of Plant, Animal and Environmental Sciences 3 (3): 189-196.
Kahyani, S., Hosseini, S. M. and Basiri, R. (2011). The Basic of Analytical of Simple Linear Regression in Forestry Studies (Case Study: Relationship between Basal Area and Tree Coverage of Quercus brantii Lindl. In Absardeh, Chahar Mahale and Bakhtiari). World Applied Sciences Journal 14 (10): 1599-1606.
Young, J. L., Dean W. C., Jung, K. P., Sung, H. K., Woo, K. L. and Jung, K. C. (2009). A Mixed Effects Height- Diameter Model for Pinus densiflora Trees in Gangwon Province, Korea. Journal of Korean Forest Society 98 (2): 178-17.
Adeyemi, A. A. and Adesoye, P. O. (2010). Site Quality Assessment and Yield Models for Tectona grandis (Linn. F.) Stands in Ibadan Metropolis. Nigerian Journal of Forestry 40 (2): 67-77.
Matthias, S., Andres, K. and Klaus, V. G. (2010). A Spatially Explicit Height-Diameter Model for Scots Pine in Estonia. European Journal of Forest Resources 130 (2): 1-3.
Adeyemi, A. A. and Ukaegbu, O. C. (2016). Tree Height-diameter and Yield Functions for Gmelina arborea (ROXB.) Stand in Edondon Gmelina Plantation, Cross River State, Nigeria. Journal of Research in Forestry, Wildlife and Environment 8 (2): 14-28.
Shuaibu, R. B. and Alao, J. S. (2016). Multiple Linear Regression Tree Stem Volume Equations for the Estimation of Merchantable Volume of Azadirachta Indica (Neem Tree) in North-West Region of Nigeria. International Journal of Forestry and Horticulture 2 (1): 1-10.
Montgomery, D. C., Peck, E. A. and Vining, G. G. (2001). Introduction to Linear Regression Analysis. 3rd Edition, Wiley, New York.
Reimann, C., Filzmoser P., Garrett R. G. and Dutter R. (2008). Statistical Data Analysis Explained. John Wiley & Sons.
Adeyemi, A. A. and Ngo-Mbonu, N. A. (2017). Tree Slenderness Coefficients and Crown Ratio Models for Gmelina arborea (Roxb) Stand in Afi River Forest Reserve, Cross River State, Nigeria. Nigerian Journal of Agriculture, Food and Environment 13 (1): 226-233.
Nunes, L., Tome, J. and Tome, M. (2010). Stability of Pure Even-aged Conifer Stands in Portugal. In IUFRO Conference, Mixed and Pure Forests in a Changing World-Vila Real: UTAD. 3pp.
Wang, Y., Titus S. J., and Lemay V. M. (1998). Relationship between Tree Slenderness Coefficients and Tree or Stand Characteristics for Major species in Boreal Mixed Forest. Canadian Journal of Forest Resources 28: 1171-1183.
James, K., Haritos, N. and Ades, P. (2006). Mechanical Stability of Trees under Dynamic Loads. American Journal of Botany 93 (10): 1522-1530.
Adesoye, P. O. (2014). Canopy Layers Stratified Volume Equations for Pinus caribaea Stands in South West Nigeria using Linear Mixed Models. South-east European Forestry 5 (2): 153-161.
Adekunle, V. A. J. (2007). Non-Linear Regression Models for Timber Volume Estimation in Natural Forest Ecosystem, Southwest Nigeria. Research Journal of Forestry 1: 40-54.
Avery, T. E. and Burkhart, H. (2011). Forest Measurements, 5th edition. McGraw-Hill, NewYork.
Akindele, S. O. and LeMay, V. M. (2006). Development of Tree Volume Equations for Common Timber Species in the Tropical Rain Forest Area of Nigeria. Forest Ecology and Management 226: 41-48.
IUCN (2019). The IUCN Red List of Threatened Species. Version 2019 1. .
Husch, B., Beers, T. W. and Kershaw, J. A. Jr. (2003). Forest Mensuration. 4th Edition, John Wiley and Sons Inc., New Jersey, USA. 949pp.
Edet, D. I., Ijeomah, H. M. and Ogogo, A. U. (2011). Preliminary Assessment of Tree Species Diversity in Afi Mountain Wildlife Sanctuary, Southern Nigeria. Agriculture and Biology Journal of North America 3 (12): 486-492.
Ibe, A. E., Onuoha, G. N., Adeyemi, A. A., Ogueri, C. U., Ibe M. A. and Okafor D. C. (2014). Assessment of Ecological Status and Tree Diversity in Ohaji/Egbema Watershed, South-Eastern, Nigeria. International Journal of Natural and Applied Sciences 10 (1): 21-33.
Wardle, D. A., Walker, L. R. and Bardgett, R. D. (2004). Ecosystem Properties and Forest Decline in Contrasting Long-Term Chronosequence. Science 305: 509-513.
Akinsanmi, F. A. and Akintunde, S. P. (2016). Analysis of Carbon Sequestration Potential of Tree Species in Agba Forest Reserve, Ilorin, Kwara State. Proceedings of the 38th Annual Conference of the Forestry Association of Nigeria (FAN). Mangroves and Wetland of Sub-Saharan Africa: Potential for Sustainable Livelihood and Development. Pp. 653-662.
Parthasarathy, N. (1999). Tree Diversity and Distribution in Undisturbed and Human Impacted Sites of Tropical Wet Evergreen Forest in Southern Western Ghats. India Biodiversity Conservation 8: 1365-1381.
Jimoh, S. O., Adesoye, P. O., Adeyemi, A. A. and Ikyaagba, E. T. (2012). Forest Structure Analysis in the Oban Division of Cross River National Park, Nigeria. Journal of Agricultural Science and Technology B2: 510-518.
Adeyemi. A. A. and Adesoye, P. O. (2016). Evaluation of Some Weibull Parameter Estimation Methods for Characterizing Stem Diameter Distribution in a Tropical Mixed Forest of Southern Nigeria. Journal of Statistical Science and application 4 (11-12): 257-275.
Browse journals by subject