{"title":"孟加拉国达卡市湖边植被中的树木多样性、丰度和优势度","authors":"Evana Akter, Mohammad Zashim Uddin","doi":"10.3329/bjpt.v30i2.70502","DOIUrl":null,"url":null,"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)","PeriodicalId":55590,"journal":{"name":"Bangladesh Journal of Plant Taxonomy","volume":"380 2","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tree Diversity, Abundance And Dominance In The Lakeside Vegetation of Dhaka City, Bangladesh\",\"authors\":\"Evana Akter, Mohammad Zashim Uddin\",\"doi\":\"10.3329/bjpt.v30i2.70502\",\"DOIUrl\":null,\"url\":null,\"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. 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Tree Diversity, Abundance And Dominance In The Lakeside Vegetation of Dhaka City, Bangladesh
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)
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).