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Checklist of Angiosperms Extant in Mirpur Area of Dhaka City

Shayla Sharmin Shetu*
Department of Botany, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh

Saleh Ahammad Khan
Department of Botany, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh

Sarder Nasir Uddin
Bangldesh National Herbarium, Chiriakhana Road, Mirpur-1, Dhaka-1216, Bangladesh

Abstract/ Executive Summary:

This study has recognized the occurance of a total of 346 species of Angiosperms under 256 genera and 82 families and assessed their current status and distribution in Mirpur area of Dhaka district. Majority of these families, 68 (82.92%) consist of 255 species under 192 genera, belong to Magnoliopsida (dicotyledons), and the rest 14 (17.07%) comprise of 91 species under 64 genera to Liliopsida (monocotyledons). Asteraceae with 18 species is found to be the largest family in Magnoliopsida followed by Euphorbiaceae and Fabaceae consists of 17 species each; while Poaceae is recognized as the largest family with 41 species in Liliopsida followed by Cyperaceae with 19 species. Ficus of Moraceae and Cyperus of Cyperaceae, each consists of 6 species, are found to be the largest genera in Magnoliopsida and Liliopsida, respectively. Total 236 species have been recorded as herbs followed by 58 tree seedlings, 50 shrubs and 2 lianas. Scrub jungles harbouring a total of 90 species are found to be the most common habitat of Angiosperms in the area, which is followed by marginal lands, road sides, grasslands, lake banks, fallow lands, woodlands, river bank, and highland slope and wet lands. A total of 281 economically important species have been determined from the study area. The occurrence of two threatened species, viz. Andrographis paniculata (Burm.f.) Nees and Rauvolfia serpentina (L.) Benth. ex Kurz, listed in the Red Data Book of Bangladesh, is recognized to be Vulnerable (V) in the study area.

Keywords: Checklist, Angiosperms, Mirpur, Dhaka.

Location: Mirpur area of Dhaka district

Start Date: 00-00-2013

End Date: 00-00-2017

Program Area: Conservation and Biodiversity

Commodity: Plant(s)

Objectives:

An attempt has been taken to explore, collect and document the angiospermic species naturally growing in greater Mirpur area, provide the baseline data on their composition, distribution and economic importance and find out whether any of these species is threatened there.

Methodology:

The taxonomic inventory of this study was conducted through 20 field trips in different seasons between 2013 and 2017 throughout the study area. Necessary field data and representative plant specimens of Angiosperms naturally growing in the study area were collected and preserved following standard herbarium techniques (Bridson & Forman, 1989; Singh & Subramaniam, 2008). All plant specimens were preliminarily identified through consulting the experts and matching with relevant and properly identified voucher specimens preserved at Jahangirnagar University Herbarium (JUH), Dhaka University Salar Khan Herbarium (DUSH) and Bangladesh National Herbarium (DACB). The identification of the plant specimens were verified through matching them with the type images available in the websites of different international herbaria and their characters with relevant taxonomic descriptions and keys available in the literature (e.g, Ahmed et al., 2008-2009; Hooker, 1872-1897; Prain, 1903; Kanjilal et al., 1934, 19381940; Siddiqui et al., 2007; Wu & Raven, 1994-2001 and Wu et al., 1999-2013). The voucher specimens of all taxa collected from the study area have been preserved at JUH. Nomenclatural information of each taxon was verified following Flora of China (Wu & Raven, 1994-2001 and Wu et al., 1999-2013) and the nomenclatural databases of IPNI (2015), The Plant List (2017) and TROPICOS (2017). The families have been arranged according to the classification system of Cronquist (1981). The genera and species under each family have been arranged alphabetically. The common names have been cited based on Huq (1986), Pasha & Uddin (2013) and interview with the local people. The economic importance is recorded through consulting the relevant literature (e.g., Ghani 1998; Sharma, 2002; Van Valkenburg & Bunyapraphatsara, 2002). IUCN threatened category is estimated consulting Melville (1970-1971), IUCN (2001), Khan et al., (2001) and Ara et al., (2013).

Source of Information: Jahangirnagar University J. Biol. Sci. 7(2): 47-64, 2018 (December)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The checklist provides basic information on the species of Angiosperms currently occurring in the study area. It can serve as an important baseline to track the trend of changes in the floristic composition and biological diversity of this rapidly expanding urban area in course of time and different biogeographical processes. These data might be useful in planning and implementation of various development works keeping healthier and sustainable environment through maintaining the natural repositories of wild genetic resources along with plantation of trees and ornamentals in Dhaka city.

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