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Tree species composition, diversity and structure of Finima Nature Park, Bonny Island, Nigeria

Rosemary Egodi Ubaekwe, Uzoma Darlington Chima, Funmilayo Sarah Eguakun

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J. Bio. Env. Sci.21(5), 161-171, November 2022


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This study evaluated the tree species composition, diversity and structure of Finima Nature Park, to ascertain its status and provide essential information that could enhance sustainable management of the Park. Random sampling was used to delineate 30 sample plots of 30×30 m size. All tree species≥ 10cm diameter at breast height (dbh) were identified to species level and enumerated. Total tree height and dbh were measured using clinometer and diameter tape, respectively. Shanon-Weiner and Simpson’s indices were used to assess tree species diversity. Importance Value Index (IVI) and forest structure were estimated; data were analysed using descriptive statistics. A total of 52 tree species from 27 families were Identified; Anthostema aubryanum, and the Euphorbiaceae family, dominated the Park; Alchornea cordifolia and Cecropiaceae were the least encountered species and family, respectively. Low population density of many tree species and high percentage of low diameter class tree species were recorded. No tree with diameter above 90cm was encountered in the Park. Shanon-Weiner and Simpson’s index values were 3.10 and 0.93, respectively. Finima Nature Park showed high species diversity and good regeneration potentials. However, there is the need to apprehend the low population density of many tree species and initiate plans to enhance their populations. Illegal logging should be checked and the protection of the Park enhanced to encourage the growth of tree species to larger diameter classes.


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Tree species composition, diversity and structure of Finima Nature Park, Bonny Island, Nigeria

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