Abstract:
Urban botanical garden plays an important role in mitigating hazards evolved due
to climate change through sequestering atmospheric carbon dioxide. The study
was conducted during the period of January to April 2018 to the estimation of
ecosystem carbon stock and tree species diversity at National Botanical Garden,
Dhaka, Bangladesh. Using transects line method square plots with a size of 20 m
× 20 m were taken. So altogether there were total eighty three sample plot in
National Botanical Garden. Above ground carbon (AGC) and below ground
carbon (BGC) biomass stock was 192.67 and 31.34, respectively and soil organic
carbon mean value of 27.52 Mg ha
-1
, 21.45 Mg ha
-1
and 16.23 Mg ha
,
respectively for 0-10 cm depth, 10-20 cm and 20-30 cm depth. The average
number of trees in National Botanical Garden (233 tree ha
-1
), basal area (21.45 m
ha
-1
) and mean DBH (39.86 cm). Tree diversity range from 0.25 to 1.86 and the
mean value of (0.93 ± 0.14) in National Botanical Garden. Relationship such as
biomass carbon with basal area, mean DBH, stem density and tree diversity were
estimated. Among these the relationship between basal area and biomass carbon
showed positive significant correlation. Therefore, the results of the study
confirmed that the selected botanical garden can serve as a valuable ecological
tool in terms of carbon sequestration, diverse tree species and storage of soil
organic carbon.
-1
2
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGROFORESTRY AND ENVIRONMENTAL SCIENCE
SEMESTER: JANUARY-JUNE, 2018
