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Diversity in Angiosperm Flora of Teknaf Wildlife Sanctuary, Bangladesh

MOHAMMAD ZASHIM UDDIN
Department of Botany, University of Dhaka, Dhaka-1000, Banglades

MD. FAKHRUL ALAM
Department of Botany, University of Dhaka, Dhaka-1000, Banglades

MD. ABDUR RHAMAN
ACF
Teknaf Wildlife Sanctuary

MD. ABUL HASSAN
Department of Botany, University of Dhaka, Dhaka-1000, Banglades

Abstract/ Executive Summary:

Teknaf Wildlife Sanctuary has been explored to assess angioperm diversity using traditional taxonomic techniques during 2010 to 2011. The assessment has resulted in recording of total 535 angioperm species under 103 familiies and 370 genera. For each species scientific name, Bangla name (whenever available), family and habit are provided. Of 535 species, 178 represented by herbs, 110 by shrubs, 150 by trees, 87 by climbers and 10 by epiphytes. In Magnoliopsida (dicots), Fabaceae is the largest family represented by 38 species, while in Liliopsida (monocots), Poaceae is the largest family represented by 29 species.

Keywords: Angiosperm diversity, Teknaf wildlife sanctuary, Bangladesh

Location: Teknaf, Chittagong

Start Date: 00-00-2010

End Date: 00-00-2011

Program Area: Conservation and Biodiversity

Commodity: Tree

Objectives:

To document diversity of angiosperm flora of Teknaf Wildlife Sanctuary.

Methodology:

Specimen collections have been made in the Teknaf wildlife sanctuary at 2-months intervals between November 2010 and December 2011. The collections covered all habitats of the study area including hilltops, slopes, foothills, valleys, sand dune and wet areas including mangrove stretch along the Naf river. Special attention has been given to locate the species already listed as threatened categories in the country. Fertile plant specimens (flowering or fruiting specimens) were collected and processed using standard herbarium techniques (Hyland, 1972; Alexiades, 1996). The plant specimens were identified by consulting different Floras and literature, viz., Hooker (1872-1897), Prain (1903), Uddin and Hassan (2004), Siddiqui et al. (2007) and Ahmed et al. (2008a, 2009), and by comparing with the herbarium specimens available at Dhaka University Salar Khan Herbarium (DUSH) and Bangladesh National Herbarium (DACB). For updated nomenclature of the species, Siddiqui et al. (2007) and Ahmed et al. (2008a,b, 2009a,b,c) were followed. Threatened categories of plants were confirmed with the help of Khan et al. (2001). Some noxious exotic plant species were also identified comparing with the reports of Islam et al. (2003), Hossain and Pasha (2004) and Akter and Zuberi (2009). Cronquist (1981) system of classification has been followed to determine the families. Voucher specimens are deposited at DUSH.

Source of Information: Bangladesh J. Plant Taxon. 20(2): 145-162, 2013 (December)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

For the sustainable conservation of angiosperm diversity in Teknaf wildlife sanctuary, the following recommendations have been made. Database for all species need to be made first, otherwise we will loss some of the plants before their introduction to science. Set priority for species those are sensitive to disturbance and locate them in the habitat using Greographical Information System (GIS) technique. Much effort should be given to increase their number using different propagation techniques either in situ or ex situ conditions. Effort should be made to give alternate source of income for forest products dependent people. Forest and biodiversity protection act should be implemented for over ambitious people who destroy in different ways the ability of ecosystems to support biodiversity. In 2010, the status of area has been shifted to the wildlife sanctuary because of the presence of Asian wild threatened elephant. A small part of the sanctuary has also been declared as nature Reserve Park to gain public support for biodiversity conservation. The present list of plant biodiversity (535 species) is still considered as preliminary. There might be some more species yet to be listed and few specimens remain unidentified. Based on the field observations and present preliminary results it may be concluded that the sanctuary is rich in the plant diversity and the sanctuary is the home for so many threatened plant species in context of Bangladesh. Field observation also confirmed that regeneration of tree species in the habitat is severely hampered because of anthropogenic pressure and minor product collections. Invasive species such as Urena lobata, Mikania cordata, Chromolaena odorata etc. are another challenge to future regeneration of forest trees in the disturbed areas.

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