(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170


Pages: 322-325
A. A. Maiguru and E. I. Arifalo

keywords: Amboi forest reserve, forest stocking, basal area, tree density


The study was carried out to estimate woody plants stand density in Amboi Forest Reserve in Taraba State, Nigeria. All individual woody plants of ≥ 5 cm diameter in each plot were enumerated. Data collected were the species total heights and diameter at breast height (dbh). The total numbers of trees and basal area from each plot were used to estimate the stands densities. Sixty eight hectare plots of land were demarcated out from the forest. Each hectare plot was re-demarcated into four equal sizes of 50 x 50 m (2500 m2) out of which one were randomly selected for enumeration. They enumeration covers a total land area of 170,000 m2 (17 ha). The total number of trees and basal area from each plot were used to estimate plant densities. Diameter tape and halga altimeter was used for the measurements of the species diameter at breast height (dbh and total heights in the respective plots. The result shows that Plots 1 and 5 had the highest number of trees (density) with 37 each while; plot 13 had the least number of trees of 14. The total number of trees encountered in the study area was 7,532 with a mean of 110.8 per hectare. The stand basal area is ranged from 0.151 to 1.77 m2, and the total basal area obtained in the study area was 63.33 m2 with a mean of 0.93 m2 per hectare. Plot 26 had the highest basal area with 1.77 m2 and plot 33 had the least with 0.60 m. The results showed that the forest is under- stocked and to increase the number of trees in the reserve so as to raise the basal area per hectare of the forest, it is recommended that enrichment planting be carried out using fast growing exotic and indigenous species.


Abramovitz JN 1998. Putting a value on natures free services. Nature’s Hidden Economy Worldwatch Institude, 11(1): 1-10. Adekunle VAJ, Akindele SO & Fuwape JA 2004. Structure and yield models of tropical lowland rainforest ecosystem of southwest Nigeria, Food, Agriculture and Environment 2(2): 395-399. Akindele SO 2001. Forest assessment for sustainable development. J. Tropical Forest Resources, 17(2): 34 – 41. Abayomi JO 1984. Yield model for teak plantation in southern Nigeria. Paper for the 14th Annual Conference of Forestry Association of Nigeria, Forestry Research Institute of Nigeria, Ibadan, Nigeria, 18p. Avery TE & Burkhart HE 2002. Forest Measurement, 5th edition, McGraw Hill, New York, pp. 144 – 167. Campbell DG, Stone JL & Rosas A Jr 1992. A comparison of phytosociology and dynamics of three flood plains (varzea forests of known age,rio Jurua, Western Brazilian Amazon. Bot. J. Linn. Soc., 108: 213-237. FAO 2005. Global Forest resources assessment progress towards sustainable forest anagement.Forestry Paper No. 147. Rome (also available at: www.fao.org/docrepl008la400200.htm. Higman S, Bass S, Judd N, Mayers J & Mussbaum R 2002. The sustainable Forestry Handbook. A practical guide for Tropical Forest managers on implementing New standards. Earth Scan Publication Ltd. 280 pp. Holland II, Rolfe GL & Anderson DA 1990. Forests and forestry, 4th Edition, Interstate Publishers Inc. Danville, U.S.A. 476 pp. Kumar A, Gupta AK, Marcot A, Saxena BG, Singh SP & Marak TTC 2002. Management of forests in India for biological diversity and forest productivity, a new perspective. ‘Volume 1v: Garo Hills Conservation Area (GCA). Wildlife Institute of India-USDA Forest Service collaborative project report, Wildlife Institute of India. Dehra DUN, p .206. Leitner W & Turner WR 2001. Measurement and analysis of biodiversity’. In: Levin SA (ed.) Encyclopedia of biodiversity, Vol. 4. Academic Press, Princeton, pp. 123-124. Ministry of Land and Survey 2009. The administrative map of Taraba State Jalingo. Pickett SA 1995. Drivers and Dynamics of change in Biodiversity in Global Biodiversity Assessment, VH Heyward and RT Watson, Eds., pp. 311 – 318, United Nations Environment Programme, Cambridge, UK. view at Google scholar. Thorington R, Tanenbaum WS, Tarak A & Rudran R 2000. Distribution of trees in Baro Colorado Islands: A five hectare sample. “The ecology of a Tropical forest- seasonal Rhythms and long -term changes” (eds Leigh Jr, EG Rand AS & Windsor DM), Smithsomian Institute press, Washington DC. Jimoh SO, Adesoye PO, Adeyemi AA & Ikyaagba ET 2012. Forest structure analysis in the Oban Division of Cross River National Park, Nigeria. J. Agric. Sci. & Techn., B(2): 510-518. UNEP 2007. Global Environment Outlook 4. United Nations Environment programme, Nairobi.