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Floristic Composition of Lawachara Forest in Bangladesh

J. C. MALAKER
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. M. RAHMAN
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A. K. M. AZAD-UD-DOULA PRODHAN
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

S. K. MALAKER
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. A. H. KHAN
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An annotated checklist of the angiosperm genetic resources of Lawachara forest in Bangladesh was prepared to provide information on the plant diversity it contained. A total of 159 plant species was recorded under 123 genera and 60 families in Lawachara forest. As regards to their growth habits, some 78 species were found as trees, 14 species as shrubs, 42 species as herbs and 25 species as climbers. As regards to the diversity of species and genera, about 123 genera were recorded of which, Ficus and Syzygium were the largest genera having 7 species each. Terminalia and Dioscorea were the second largest genera with 4 species each followed by Artocarpus, Calamus, Piper, Alpinia and Curcuma having 3 species each. A total of 106 genera was recorded with a single species each. As regards to family composition, about 60 families were recorded in the list of which Leguminosae was the largest family having 12 genera with 13 species. Compositae was the second largest family containing 7 genera with 7 species each. Euphorbiaceae and Gramineae were the third largest family containing 6 genera and 6 species each followed by Anacardiacea, Apocynaceae and Rubiaceae with 5 genera and 5 species while verbanaceae containing 5 genera with 6 species. Combretaceae, Cyperaceae, Dioscoreaceae, Guttiferae, Musaceae, Myrtaceae and Piperaceae were represented by single genus with multiple species each, and 30 families with only single species each.

Keywords: Floristic composition, Lawachara forest, Plant diversity

Location: Lawachara forest in the Kamalgonj Upazila of Maulvi Bazar district

Start Date: 00-04-2007

End Date: 00-05-2008

Program Area: Conservation and Biodiversity

Commodity: Performance

Objectives:

To provide information on the plant diversity of Lawachara forest.

Methodology:

The phytosociological was carried out in the selected forest in the Lawachara forest in the Kamalgonj Upazila of Maulvi Bazar district from April 2007 to May 2008. For the present phytosociological analysis of the vegetation study we have selected 50 circular plots of 300 m² each area in the Lawachara forest. Plots were established randomly from different sites continuously at 100 m interval in any direction. The size of 300 m² and number of circular sampling were determined by the species area curve. To exploratory and to ascertain the plant holdings of Lawachara forest, a detailed survey has been conducted. This work consisted of basic methodological approaches and survey. The plant resources of the study area were listed and recorded with their uses, and every species was identified separately. The total number of species in all the circular sampling was recorded and then the basal area of all the species was measured. The basal area i.e., the cross section area of a tree measured at 4.5 feet above the ground (cross section area of a tree at breast height). The trees more than 31.5 cm cbh (circumference at breast height i.e., 1.37 m above the ground) were individually measured for cbh. Individuals between 10.5 to 31.5 cm cbh were recorded either as saplings or shrubs and the individuals less than 10.5 cm cbh were considered as seedlings. The existing plant species were identified on the site by the help of local people and my supervisor. The species were also identified with the help of different Journals and reference books. The families, genera and species are arranged alphabetically. The species were also identified with the help of different journals and reference books. Some species could not be identified.

Source of Information: Int. J. Expt. Agric. 1(2):1-9, (2010)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Lawachara sal forest revealed a total of 159 plant species was recorded under 123 genera and 60 families of which about 78, 14, 42 and 25 species were classified as under tree, shrub, herb and climber, respectively according to their growth habits. More importantly from the result it was evident that almost all the families at the forests were represented by single genera and the maximum number of genera by single species each indicating the poor diversity at family and genus levels. This situation demands urgent attention to enrich the plant diversity at genera and species levels to avoid the risk of extinction of single species or genera with single species.

Knowledge Management: Journal