PAPER TITLE :CARBON SEQUESTRATION OF URBAN TREES ALONG SELECTED ROADS IN ABEOKUTA, OGUN STATE, NIGERIA

JOURNAL Of SUSTAINABLE TECHNOLOGY | VOLUME 9 NUMBER 2 2018

Paper Details

  • Author(s) : BADA, B.S.1*; OYEGBAMI, I.E.1; ADEOFUN, C.O.1; SOAGA, J.A.2; ADEDEJI, O.H.1 and TOWOLAWI, A.T.
  • Abstract:

Carbon dioxide (CO2) is the major greenhouse gas and global warming propellant
which is released from human activities especially vehicular emission. The study examined carbon
sequestration potential of roadsides trees in Abeokuta, Ogun State. The major roads selected were
Asero-Obantoko (AO), Brewery-Itaoshin (BI), lyana Mortuary-Idiaba (IMI), Presidential Boulevard
Kuto (PBK) and Pansheke-Ojere (PO). After tree identification, concentrations of CO2, CO, NOx,
SO2 and H2S along the roadsides were determined using Land-Duo gas analyser. Haga Altimeter,
Girth Tape and Range Finder were used to determine diameter at breast height and height of the
trees for the estimation of Above-Ground Biomass (AGB). Regression model was used to estimate
carbon sequestered by the urban trees. Data obtained were subjected to descriptive and inferential
statistics. Mango (Mangifera indica), Gmelina (Gmelina arboreal) and Neem (Azadirachta indica)
were identified in all the roads while Cassia (Cassia seamea) were found along BI road, Step tree
(Terminalia mentalis) along PBK road, and Masquerade (Polyalthia longifolia) along AO, IMI and
PO roads. The non-green spaces zones had (p < 0.05) higher CO2 and other gases compared to the
green spaces zones. The non-green spaces zones had (p < 0.05) higher CO2 and other gases
compared to the green spaces zones. Highest AGB 66.82 × 106 kg m-2 was estimated in Neem
(Azadirachta indica) along BI roads while highest carbon sequestration of 14273.00 kg m-2 was
calculated for Gmelina (Gmelina arboreal) along PO road. Carbon dioxide concentration due to
vehicular emission reduced with roadsides trees.
Keywords: Vehicular emission; Greenhouse gases; Carbon stock; Urban trees