BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
Kaptai National Park (KNP) is a protected area and represents a tropical semi-evergreen hill forest
and home of widest variety of biodiversity in the country. Floristic composition and regeneration
status of Kaptai National Park was assessed through stratified random sampling method.Atotal of
200 sample plots were taken of 20 m * 20 m in size for trees and 2m * 2 m in size for regeneration
data collection. Result of the study showed that there were 114 tree species belonging to 42
families and 77 regenerating species belonging to 35 families were recorded from the sample
plots. The highest tree stem and regenerating seedlings density was found 373 stem ha-’ and 11788
stem ha1 for Aporosa dioica. The study indicated that A. dioica is the most dominant tree species
and its natural regeneration was also abundant in Kaptai National Park. On the other hand,
Shannon-Wiener’s diversity index, Margalef’s diversity index, Simpson’s and Pielou’s diversity
index were recorded for all the tree species. The percentage distribution of seedlings was
maximum (56.56%) in 0-50 cm height range for all species. The number of seedlings reduced
proportionately with height growth indicating a reduction of recruitment to next growth stage.
Among the regenerating species, Grewia nervosa showed maximum (9.15%) seedling
recruitment. The study is made baseline information on the natural regeneration of tree species
diversity in the protected area which is helpful to future research work on plant population change,
conservation and sustainable management planning for Kaptai National Park.
The Sundarbans mangrove forest of Bangladesh is very rich in biodiversity and
provides economic, social and ecological benefits to the country. This important
ecosystem has started loosing its biodiversity because of over-exploitation and
destruction of habitat. Emphasis has been given by the government of Bangladesh
and UNESCO on conservation of biodiversity in the Sundarbans. The paper deals
with the importance of biodiversity, current status of the flora and faunal diversity,
steps already taken and further steps needed for biodiversity conservation in the
Sundarbans forests of Bangladesh.
Key words : Biodiversity, conservation, endangered species, exploitation, extinct
species, Sundarbans
4^°
Diversity and distribution pattern of tree species of Bamu Reserved Forest of
Cox’s Bazar were studied by count plot method for analysing stand composition. A
total of 85 tree species were recorded from the forest of which 77 species belonging
to 30 families were identified. Leguminosae and Moraceae ranked top with seven
species followed by Verbenaceae and Euphorbiaceae each with six species. The
Importance Value Index (IVI) of each species was calculated to characterize the
composition of vegetation. Bursera serrata showed the highest (18.91) IVI followed
by Artocarpus chania (14.82), Pterospernium acerifolium (14.04), Hopea odorata (13.73),
Glochidion multiloculare (13.19) and Vitex peduncularis (10.51). Distribution of the
number of individuals of each species in nine diameter classes ( 80cm with
10cm intervals) were calculated with respect to total individuals. It showed that
maximum percentage of individuals (35.08%) belonged to 80cm) represented the lowest percentage (1.82%).
Bursera serra tahad the highest (8.04%) percentage distribution followed by Glochidion
multiloculare (7.67%), Dipterocarpus turbinatus (5.85%), Hopea odorata (5.36%),
Pterospernium acerifolium (4.87%), Bauhinia acuminata (4.03%) and Lagerstroemia speciosa
(3.05%). The rest of the species had values < 2.8%.
Welcome to the Bangladesh Journal of Forest Science (BJFS) – a leading platform for advancing the knowledge and understanding of forest science in Bangladesh and beyond. Established with a commitment to excellence, BJFS serves as a cornerstone for researchers, practitioners, and enthusiasts dedicated to the sustainable management and conservation of forest ecosystems.
