Undergrowth Species Composition of the Exotic and Indigenous Tree Plots in Deciduous Forest Area of Hoteya Forest Range of Tangail District, Bangladesh
American Journal of Plant Biology
Volume 1, Issue 1, November 2016, Pages: 1-12
Received: Sep. 29, 2016;
Accepted: Oct. 10, 2016;
Published: Nov. 3, 2016
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Md. Mijanur Rahman, Department of Botany, Faculty of Biological Sciences, Jahangirnagar University, Savar, Dhaka, Bangladesh
Saleh Ahammad Khan, Department of Botany, Faculty of Biological Sciences, Jahangirnagar University, Savar, Dhaka, Bangladesh
Gazi Mosharof Hossain, Department of Botany, Faculty of Biological Sciences, Jahangirnagar University, Savar, Dhaka, Bangladesh
Md. Abdur Rahim, Plant Systematics and Biodiversity Laboratory, Department of Botany, Faculty of Biological Sciences, Jahangirnagar University, Savar, Dhaka, Bangladesh
To assess the impacts of monoculture of exotic tree species on the species composition and status of undergrowths in relation to that of indigenous tree species and to provide the baseline data on the undergrowth species of the plantation forests of exotic and indigenous tree species that might be useful in biodiversity conservation through appropriate selection of tree species for massive plantation programs.This study reports 116 undergrowth species belonging to 97 genera and 52 families of vascular plants fromthe tree plotsof exotic Acacia auriculiformis and Eucalyptus camaldulensis and 150 undergrowth species under 122 genera and 56 families from that of indigenous Shorea robusta and Mangifera indica of Hoteya Forest Range of Tangail district. Most of the 182 undergrowth species, found in exotic and indigenous tree plots together, were Angiosperms (±95%) and only ±5% were Pteridophytes. 63.74% of these species were herbs, 25.82% trees and 10.44% shrubs. In exotic tree plots, the undergrowths of 86, 87 and 76 species, and in indigenous tree plots, the undergrowths of 118, 113 and 111 species were found in summer-, monsoon- and winter seasons, respectively. In S. robusta-, A. auriculiformis-, E. camaldulensis-, and M. indica tree plots, a total of 93,69, 61 and 42 species were found in summer; 90, 77, 55, and 46 species in monsoon; and 82, 68, 39 and 51 species in winter seasons, respectively. In exotic tree plots, Axonopus compressus was found in highest relative density and frequency and Cyperus iria in highest relative abundance, whereas, in indigenous tree plots, A. compressus was found in highest relative density and abundance, and C. infortunatum in highest relative frequency when all undergrowth species were considered. Species number and density were significantly different between A. auriculiformis- and S. robusta- and M. indica- or E. camaldulensis plots. Study conclude that, indigenous tree plots harbored the higher number of species (18.68%) than the exotic tree plots, considering all types of plant species and all seasons and the number of uncommon species was relatively higher in number in indigenous tree plots than that in exotic tree plots. It proves that plantations of indigenous tree species are relatively better in harboring better species richness and diversity. This study suggests preferring the indigenous species for plantation programs in forested and fertile land areas; and exotic species for that in the degraded or barren areas with strict maintenance of the natural condition.
Md. Mijanur Rahman,
Saleh Ahammad Khan,
Gazi Mosharof Hossain,
Md. Abdur Rahim,
Undergrowth Species Composition of the Exotic and Indigenous Tree Plots in Deciduous Forest Area of Hoteya Forest Range of Tangail District, Bangladesh, American Journal of Plant Biology.
Vol. 1, No. 1,
2016, pp. 1-12.
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