Tree species diversity, composition and structure in the tropical moist deciduous forest of Kadigarh National Park, Mymensingh, Bangladesh
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Abstract
Abstract. Das N. 2024. Tree species diversity, composition and structure in the tropical moist deciduous forest of Kadigarh National Park, Mymensingh, Bangladesh. Asian J For 8: 41-49. The species diversity, floristic composition, and structural characteristics of tree species in Kadigarh National Park, Mymensingh, Bangladesh, where the forest is of the tropical moist deciduous type, were explored. The study was carried out by randomly sampling 20 m × 20 m plots to record and identify trees in the area, resulting in 87 species belonging to 70 genera and 34 families. Additionally, the stem density, Basal area, diversity indices, and importance value index of tree species with a Diameter at Breast Height (DBH) of ?5 cm were assessed in this protected area. The basal area of tree species and stem density were 18.105±1.06 m2 ha-1 and 1373.07±44.83 stems ha-1, respectively. The diversity indices, such as the Shannon-Wiener diversity, Simpson diversity, Margalef's richness, and Pielou's evenness index, showed poor diversity compared to other protected areas in Bangladesh. The structural composition based on DBH and height indicated higher regeneration and recruitment, but the trees of large-growth classes were removed. Sal (Shorea robusta Gaertn.) was identified as the most dominant and native tree species, accounting for 72% of the tree individuals. However, some rare tree species, such as Sidha (Lagerstroemia parviflora Roxb.), Mahua (Madhuca longifolia (J.Koenig ex L.) J.F.Macbr.), and Thona (Oroxylum indicum (L.) Kurz), showed the presence of Sal. Therefore, this research will support future policymakers in formulating a forest resource management plan for Kadigarh National Park.
2017-01-01