40 ‘Chop, but no broke pot’: the case of Prunus Africana on Mount Cameroon
Photo 1. Measuring dbh of large individual of P. africana (Photo by T.C.H. Sunderland)
is also closely associated with mean annual temperatures of 11°C to 19°C in the
coolest months and 17°C to 23°C in the warmest (Fraser et al. unpublished
report). It is also evident on Mount Cameroon that P. africana thrives in dense
stands in areas recently disturbed by volcanic activity, being one of the first
species to colonise and form a forest canopy on recent lava flows. Figure 1
illustrates how Prunus africana is heavily concentrated (density represented by
colours and numbers) on recent incursions of lava into montane forest areas
and disappears completely from the climax (undisturbed) montane forest, as on
the north-western flank, which has for the most part not been affected by lava
flows for some centuries. Figure 2 shows the main area of P. africana occurrence
in the study area. The mean density of P. africana individuals on Mount Cameroon
with a diameter at breast height (DBH) of greater than 20 cm is estimated at 5.5
trees/ha (ONADEF unpublished report).
The soil in the Mount Cameroon area is volcanic based and such recent laval
soils with their associated pyroclastic ash are highly useful for commercial
agricultural purposes (FAO-UNESCO 1977). The land use system in the raw material
producing area is not in particular conflict with the sustainability of the resource
in the wild because much of this intensive agriculture occurs at altitudes below
the altitudinal range of P. africana.
There is growing interest on the part of the communities, as well as research
and environmental institutions, in the domestication of P. africana. Basic
requirements of P. africana seed production and nursery have been studied by
Sunderland and Nkefor (1997) and, more recently, by the International Centre
for Research in Agroforestry (ICRAF) for vegetative multiplication (Tchoundjeu
et al. 2002). Sunderland and Nkefor (1997) reported that, if basic cleaning and
storage requirements of Prunus seeds are satisfied, Prunus seeds maintain
03prunus.p65 40 22/12/2004, 11:04