Tree Diversity, Abundance And Dominance In The Lakeside Vegetation of Dhaka City, Bangladesh

IF 0.6 4区 生物学 Q4 PLANT SCIENCES Bangladesh Journal of Plant Taxonomy Pub Date : 2023-12-24 DOI:10.3329/bjpt.v30i2.70502
Evana Akter, Mohammad Zashim Uddin
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Abstract

The present article deals with evaluating tree diversity, abundance, and dominance in the urban lakeside vegetation of Dhaka city. Data were collected using systematic sampling methods along with the transect lines. Visitor’s perceptions about existing tree diversity were also collected. A total of 2322 individuals under 118 tree species in 39 families were recorded from Dhanmondi, Hatirjheel and Gulshan lakeside vegetations. The origin analysis of tree species revealed that 39% areexotic and 61% are native. Among the tree species, the five most abundant areSwieteniamahagoni, Mangiferaindica, Cocos nucifera, Khayaanthothecaand Delonixregia. In these abundant tree species, three are exotic,such as Swieteniamahagoni, Khayaanthotheca, and Delonixregia, and the rest are native. According to the importance value index, the most five dominant tree species are Swieteniamahagoni, Samaneasaman, Cocos nucifera, Mangiferaindica, and Delonixregia. Likewise, among the top five dominant tree species, three are exotic, such as Swieteniamahagoni, Sananeasaman, andDelonixregia; the rest are native. The maximum number of tree species in the study areas are ornamental (25%), followed by medicinal (23%), fruit-bearing (22%), timber-producing (19%), and wildlife-supporting (11%). The maximum value of the Shannon diversity index was found in Dhanmondi (3.78), followed by Gulshan (3.41), and Hatirjheel (3.34). According to visitors’ perceptions, 85% of visitors favored positive actions regarding different management issues forlakeside tree diversity to enhance ecosystem services. A number of threats were identified for tree diversity in the study areas and suggested a number of recommendations for the management of tree diversity in three lakesides of vegetation (Dhanmondi, Hatirjheel, and Gulshan) to improve ecosystem services in the future. Bangladesh J. Plant Taxon. 30(2): 263-275, 2023 (December)
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孟加拉国达卡市湖边植被中的树木多样性、丰度和优势度
本文旨在评估达卡市城市湖边植被中树木的多样性、丰度和优势地位。数据收集采用了横断面系统取样法。此外,还收集了游客对现有树木多样性的看法。在 Dhanmondi、Hatirjheel 和 Gulshan 湖边植被中记录了 39 科 118 种树木共 2322 个个体。树种来源分析表明,39% 为外来树种,61% 为本地树种。在这些树种中,数量最多的五个树种是:Swieteniamahagoni、Mangiferaindica、Cocos nucifera、Khayaanthotheca 和 Delonixregia。在这些丰富的树种中,有三个是外来树种,如 Swieteniamahagoni、Khayaanthotheca 和 Delonixregia,其余都是本地树种。根据重要性价值指数,最主要的五种树种是 Swieteniamahagoni、Samaneasaman、Cocos nucifera、Mangiferaindica 和 Delonixregia。同样,在前五大优势树种中,有三个是外来树种,如 Swieteniamahagoni、Sananeasaman 和 Delonixregia,其余都是本地树种。研究地区的树种中,观赏树种最多(25%),其次是药用树种(23%)、果树树种(22%)、木材树种(19%)和支持野生动物的树种(11%)。香农多样性指数的最大值出现在 Dhanmondi(3.78),其次是 Gulshan(3.41)和 Hatirjheel(3.34)。根据游客的看法,85% 的游客赞成针对湖边树木多样性的不同管理问题采取积极行动,以提高生态系统服务。研究发现了研究区域树木多样性面临的一些威胁,并为三个湖边植被(Dhanmondi、Hatirjheel 和 Gulshan)的树木多样性管理提出了一些建议,以改善未来的生态系统服务。孟加拉国植物分类学杂志》。30(2):263-275,2023 年(12 月)
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来源期刊
CiteScore
0.42
自引率
44.40%
发文量
12
审稿时长
6 months
期刊介绍: Bangladesh is a humid, subtropical country favouring luxuriant growth of microorganisms, fungi and plants from algae to angiosperms with rich diversity. She has the largest mangrove forest of the world in addition to diverse hilly and wetland habitats. More than a century back, foreign explorers endeavoured several floral expeditions, but little was done for non-vasculars and pteridophytes. In recent times, Bangladesh National Herbarium has been carrying out taxonomic research in Bangladesh along with few other national institutes (e.g. Department of Botany of public universities and Bangladesh Forest Research Institute).
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