Nyamadzawo, G., Gotosa, J., Muvengwi, J., Wuta, M., Nyamangara, J., Nyamugafata, P., & Smith, J. L. (2012). The Effect of Catena Position on Greenhouse Gas Emissions from Dambo Located Termite (Odontotermes transvaalensis) Mounds from Central Zimbabwe. Atmospheric and Climate Sciences, 2(4), 502-509
Methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2)O)
are greenhouse gases (GHGs) which cause global warming. Natural sources
of GHGs include wetlands and termites. Previous studies have quantified
GHG emissions from upland termites and no study has reported GHG
emissions from seasonal wetlands (dambo) located termite mounds. The
objective of this study was to evaluate the effect of dambo catena
position on termite mound distribution and GHG emissions. It was
hypothesized that mound density and GHG emissions from Odontotermes
transvaalensis mounds, vary with catena position. The evaluated catena
positions were margin, mid-slope, lower slope and bottom. Mound density
was significantly lower in the bottom when compared to the other catena
positions. The mean GHG fluxes were 88 µg m2 hr-1, 0.78 mg m2 hr-1 and 1361 mg m2 hr-1 for N2) O, CH4 and CO2 respectively. Fluxes varied with catena position and were 0.48, 0.72, 1.35 and 0.79 mg m-2 hr-1 for CH4 , and 1173.7, 1440.7, 1798.7 and 922.8 mg m-2 hr-1 for CO2 in the margin, mid-slope, lower slope and the bottom catena position respectively. For N2)
O, there were no significant differences between catena positions. It
was concluded that dambo located Odontotermes transvaalensis termite
mounds are an important source of GHGs, and emissions varied with catena
position for CO2 and CH4.
We have created this Blog and the database to provide a place where the scientific community can share and update the fast growing knowledge and data on the study of greenhouse gas CO2, CH4, and N2O fluxes in Africa.
We are grateful for the numerous researchers and technicians who provide invaluable data. It is impossible to cite all the references due to limited space allowed and we apologize for the authors whose work has not been cited.