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Liana species richness abundance and relationship with trees in the Bobiri forest reserve Ghana: Impact of management systems

Journal Article

Addo-Fordjour P; Anning A; Larbi J; Akyeampong S

2009

Forest Ecology and Management

257

1822-1828

Forest management practices which may represent various forms of disturbance regimes could influence liana species richness abundance and relationship with their hosts. The study sought to determine the impacts of three management systems namely the Selection Tropical Shelterwood and Post Exploitation Systems (SS TSS and PES respectively) on liana species richness abundance and relationship with trees in the Bobiri forest reserve Ghana. Lianas with dbh ‚â• 2 cm found on trees with dbh ‚â• 10 cm were enumerated in 1 ha plot each in the SS TSS and PES. All trees (dbh ‚â• 10 cm) within the plots that did not carry lianas were also enumerated. A total of 640 liana individuals belonging to 27 species 22 genera and 13 families were identified in the management systems. Griffonia simplicifolia (Vahl ex DC.) Baill. Motandra guineensis (Thonn.) A.DC. and Calycobolus africanus (G.Don) Heine were the abundant species in all the management systems. Unlike in SS lianas in the TSS and PES were dominated by a few species. Larger diameter lianas were more abundant in the PES (32%) compared with the SS (18.3%) and the PES (13.1%). Liana diversity (H‚Ä=) (species richness and abundance) was quantitatively higher in the SS (2.8) than the TSS (2.2) and the PES (2.0). The numbers of lianas carried by tree species differed significantly in the management systems (p < 0.001 each). Liana infestation in the forest was high. The level of liana infestation did not reflect the extent of liana load per tree in the management systems. Larger trees carried significantly more liana individuals than smaller trees in the PES (p = 0.019 r2 = 0.15). There was a positive significant relationship between host dbh and liana dbh in the PES (p < 0.001 r2 = 0.23) and TSS (p = 0.024 r2 = 0.11). Tree diversity appeared to have influenced liana species richness and abundance.

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The Liana Ecology Project is supported by Marquette University and funded in part by the National Science Foundation.

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