Mgambo Forest Reserve: A biodiversity survey. - Eastern Arc ...

Mgambo Forest Reserve
Table 15 Disturbance transect results showing total pole counts and average pole counts per hectare.
Number of poles/ha
Transect
number
Transect
length
(m)
Total no.
poles
sampled
Live
Poles
Average
Live
Poles/ha
Dead
Poles
Average
Dead
Poles/ha
Old Cut
Poles
East Usambara Conservation Area Management Programme Technical Paper 59
Old Cut
Poles
/ha
New Cut
Poles
32
New Cut
Poles
/ha
0 450 267 228 507 27 60 11 24 1 2
1 850 596 467 549 80 94 40 47 9 11
2 1200 807 656 547 120 100 26 22 5 4
3 2535 1639 1146 452 402 159 90 36 1 0
4 3550 1987 1655 466 265 75 63 18 4 1
5 3800 2572 2077 547 428 113 63 17 4 1
6 1250 500 364 291 117 94 19 15 0 0
Total 13635 8368 6593 3359 1439 695 312 179 24 19
600
500
400
300
200
100
0
0 1 2 3 4 5 6
Transect number
Figure 11 The relative abundance of live, dead and cut poles in Mgambo FR.
Sum of live poles/ha
Sum of dead poles/ha
Sum of old cut poles/ha
Sum of new cut poles/ha
Rates of timber extraction are summarised in Table 16 and Figures 12 and 14. A total of 1011
timbers per hectare were alive, 229 dead and 21 cut, representing 80%, 18% and 2% of all timbers
sampled respectively (Table 16). Transect 3 showed greatest evidence of timber cutting with 9 cut
timbers per hectare representing 5% of all timber sampled along this transect line. (Table 16 and
Figure 12). The incidence of live and dead timbers was fairly evenly distributed through the
reserve with no particular transects showing significantly higher concentrations of timbers than
others. (Table 16 and Figure 14). As with pole-extraction, the highest levels of timber extraction
was found to be within proximity of Daluni and Bwiti villages (see Figure 16, and refer to Figure
3 for positioning of villages).