Timber potential value in the eastern-arc mountains, Tanzania: Nyanganje forest reserve
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Date
2009
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Publisher
Sokoine University of Agriculture
Abstract
The study was conducted to determine the quantity of timber and extent of illegal timber
harvesting in Eastern Arc Mountains. Data were collected using three techniques: desktop
review which was used to collect information on timber stocks from two studies in EAMs
while socio-economic and ecological surveys were employed to collect information on
timber disturbances and timber stocks harvested illegally in NFR. Data analysis involved
use of Microsoft excel and Statistical Package for Social Sciences (SPSS). A t-test analysis
showed that, the EAMs have high potential in terms of timber tree stocks (p (t) = 0.047 d.f
= 39) for stems per ha and (p (t) = 0.001 d.f = 39) for volume per ha). Also linear
regression analysis showed that, extraction of timber trees in NFR mostly occurs illegally
at the roadside (R 2 = 0.19, p = 0.015). A total of 135 600 000 stems and 74 400 000 m 3 (an
equivalent of 0.6 m 3 per tree) composed of 180 different timber species were identified in
EAMs. The major timber species contributed 47 000 000 m 3 (63%) of total wood volume.
Taking the royalty and volume of each timber classes for indigenous and exotic species,
the value of timber in EAMs was USD 5576 million. The harvestable timber was about
USD 4461 million for trees sizes of greater than 40 cm DBH. The mean annual quantity of
wood harvested illegally was estimated to be 6.2 m 3 per ha, of which 2.7 m 3 per ha was due
to timber harvesting. If extraction is done in every hectare in NFR, each year the
government could lose USD 0.36 million. Though the EAMs have high potential of timber
species, this potentiality will be depleted if effective measures are not taken due to the fact
that currently these forests are under pressure for timber extraction. The timber trees
species thus need to be well managed and conserved, to ensure sustainability.
Description
Keywords
Timber Potential, Nyanganje Forest Reserve, Tanzania
Citation
Makero,J.S(2009)Timber Potential Value In The Eastern-Arc Mountains, Tanzania: Nyanganje Forest Reserve .Morogoro; Sokoine University of Agriculture.