Assessment of the biological values of different land cover types in ...

genus Albizia were also recorded in the forest reserves. The tree species included Millettia usaramensis.
Twelwe (12%) of the tree species were found in the mixed farming areas, of which one species; Dialium holtzii
was also recorded in the forest reserves. In the land cover type consisting of a mosaic of fallow land,
agroforest and monoculture, three (3%) tree species were recorded, of which none were recorded in the forest.
Six (6%) of the tree species were recorded in the monoculture and mixed farming areas, of which none were
recorded in the forest. In the teak plantation, twelwe (12%) tree species were recorded, of which none were
recorded in the forest.
Table 4. Tree species recorded in the landscapes of the East Usambara Mountains.
Vegetation/Land cover type Number of tree Number of tree species also
species recorded recorded in the forests
Village forest reserves 58 -
Agroforests 24 9
Fallow lands 18 3
Mixed farming plot 12 1
Fallow land, agroforest and
3 0
monoculture plot
Monoculture and mixed farming plot 6 0
Plantation 12 0
Out of the shrub species, six (35%) species were recorded inside the village forest reserves (table 5). Seven
(41%) species were recorded in the agroforest plots, of which two were also recorded in the village forest
reserves. The list includes Whitfieldia elongata and Piper capense. Five (29%) of the shrub species were
recorded in the monoculture and mixed farming plot. Six (35%) of the shrubs were recorded in the fallow lands,
one (6%) of the shrubs were recorded in the mosaic of fallow land, agroforest and monoculture plot and one
(6%) of the shrub species was found in the mixed farming plot. Of these species, none were recorded in the
village forest reserves.
Table 5. Shrub species recorded in the landscapes of the East Usambara Mountains.
Vegetation/Land cover type Number of shrub species Number of shrub species
recorded
also recorded in the forests
Village forest reserves 6 -
Agroforests 7 2
Fallow lands 6 0
Mixed farming plot 1 0
Fallow land, agroforest and
monoculture plot
1 0
Monoculture and mixed
farming plot
5 0
Plantation 1 0
Out of the herb species, only two species (6%) were recorded in the village forest reserves. Twentytwo (71%)
were recorded in the agroforest plots, out of which one was recorded also in the village forest reserves. Eleven
herb species (35%) were recorded in the fallow lands, eight (26%) herb species in monoculture and mixed
farming plot while four herb species (13%) were recorded in the mixed farming plot, as well as in the mosaic of
fallow land, agroforest and monoculture. In the plantation, two herb species were recorded. None of the herb
species recorded on the land uses other than agroforests was also recorded in the village forests (table 6).
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