Woody species composition, structure and diversity of vegetation of Kalfou Forest Reserve, Cameroon

Natural stand changes in the forest reserve of Liedekerke were analysed during the period 1986-1996, using a permanent grid of circular plots. The monitoring concentrated on natural changes in species composition, using stem number and basal area as indicators, and changes in spatial distribution and colonization capacities of trees and shrubs, with special interest in the competition between exotic and indigenous species. After only a decade of monitoring important natural changes in the woody layer were detected. The pioneer forest is gradually maturing through self-thinning processes and shifts in species composition. The overall stem number decreased with 33.6%, while the basal area increased with 20.9%. Birch (Betula pendula/ pubescens) and indigenous oak (Quercus robur/petraea) remained dominant. More tolerant exotic species, like red oak (Quercus rubra) and sweet chestnut (Castanea sativa), are slowly increasing their share in the species composition and expanding their range. Pioneer species on the other hand, like aspen (Populus tremula), willow (Salix capreaicinerealaurita), alder buckthorn (Frangula alnus) and common (Alnus glutinosa) and grey alder (A. incana), strongly declined. Black cherry (Prunus serotina) seems to be slowly invading the forest due to its massive natural regeneration. Strong competition may be expected especially from rowan ash (Sorbus aucuparia), which showed similar regeneration and colonization capacities. Elder (Sambucus nigra) dramatically extented its range, though its share remains marginal. Beech remained absent most probably due to the lack of mature trees in the vacinity of the forest. Finally this change detection allowed that general predictions could be made on the future natural development and composition of this forest reserve, which could serve forest management decisions.

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KERAGAMAN KOMPOSISI JENIS DAN STRUKTUR VEGETASI PADA KAWASAN HUTAN LINDUNG DENGAN POLA PHBM DI BKPH TAMPOMAS, KPH SUMEDANG, PERUM PERHUTANI DIVISI REGIONAL JAWA BARAT DAN BANTEN Species Composition and Vegetation Structure of Protected Forest Area using .

Journal of Tropical Silviculture ◽

10.29244/j-siltrop.8.2.123-129 ◽

2017 ◽

Vol 8 (2) ◽

pp. 123-129

Author(s):

Cecep Kusmana ◽

Anggun Rahayu Melyanti

Keyword(s):

Species Composition ◽

Plant Species ◽

Dominant Species ◽

Forest Area ◽

Stand Age ◽

Protection Forest ◽

Composition Structure ◽

Forest Status ◽

Coffee Species ◽

Pinus Merkusii

BKPH Tampomas is part of the FMU area of Sumedang entirely classified into protected forest area. However, part of treated as CBFM with the aim of involfing the community in forest concervation activities the aim of this research is to describe and compare the structure and composition of the plant species between the subjected to CBFM and non CBFM Tampomas. The reaserch location was based on forest status of the protected area as having the same stand age and tree spacing. Data collection conducted throught the analysis of vegetation and soil sampling at each observation location species richness of BKPH Tampomas protection forest was relatively low either non CBFM of protected forest, CBFM protection forest of coffe and CBFM protection forest of cardamon. At the level of seedling stage there are 9 species and Calliandra haematocephala, the dominant. Species at the pole stage are found 3 species with Pinus merkusii species as the dominant species, at the tree stage are 2 species that dominated by Pinus merkusii. The covercrop found were 30 species and dominated by Lepturus repens. The low soil fertility and sandy soil texture composition also account for the low plant species in the BKPH Tampomas protection forest areas.Key words : CBFM cardamon, CDFM coffee, species composition, structure vegetation, Tampomas Mountain

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Assessment of species diversity and distribution of woody species on selected plots in Olokemeji Forest Reserve, Ogun State, Nigeria

Ife Journal of Science ◽

10.4314/ijs.v22i3.3 ◽

2021 ◽

Vol 22 (3) ◽

pp. 43-50

Author(s):

D.M. Taiwo ◽

S.I. Udoh ◽

S.O. Olaoti-Laaro ◽

O.R. Jeminiwa ◽

M.S. Jeminiwa

Keyword(s):

Species Richness ◽

Species Diversity ◽

Woody Species ◽

Tectona Grandis ◽

Importance Value ◽

Forest Reserve ◽

Lowland Rain Forest ◽

Ogun State ◽

The Status ◽

And Function

The Assessment of forest species composition and species diversity is essential in understanding the status of tree population and diversity for conservation purpose. Olokemeji forest reserve is situated in the lowland rain forest of south-western Nigeria and it occupies a total land area of 58.88 km2 . Six study plots of 50m2 each were randomly selected and designated as Frequently Burnt Plot 1, Frequently Burnt Plot 2, Harvested Plot, Unharvested Unburnt Plot, Arable Plot 1 and Arable Plot 2 for the purpose of assessment of species diversity and distribution of woody species. Seven species of trees were identified belonging to five families. One hundred and eighty two stands were enumerated, with Unharvested Unburnt Plot having the highest number of trees at 50. The dominance index for the woody flora was 1 in Frequently Burnt Plot 1 and 2 as well as Arable Plot 1 and 2 except for the Harvested Plot that had the lowest (0.29) while the Unharvested Unburnt Plot had 0.75. Highest species richness was recorded at the Harvested Plot at 0.71. The species diversity in Harvested Plot was low (1.54), while it was extremely low in Unharvested Unburnt Plot (0.43). Evenness index was lowest in the Unharvested Unburnt Plot at 0.43. Tectona grandis had the highest relative importance value in the Frequently Burnt Plot 1. The low species richness and species diversity is a direct indication of anthropogenic interference in the study plots and the forest reserve; this requires urgent mitigation to prevent a total loss of its structure and function as expected of a forest reserve. Keywords: Species, Diversity, Evenness, Anthropogenic, Forest, Dynamics

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