[en] Landscape Ecological Survey of the Bipindi-Akom II ... - ITTO

intensity shifting cultivation takes up about 13% ofthe TCP area or 21,360 ha. ha. Within the shifting shifting
cultivation areas patches of forest are found, both undisturbed and disturbed.
Unlike shifting cultivation activities, which are strongly concentrated in specific areas, the impact
of of logging on the forest vegetation could not be mapped accurately. This is primarily due to scale
problems. Moreover, with time the the differences between extensively extensively logged-over forest and and 'virgin'
forest stands stands become quite quite subtle, whereas whereas the the seven plant communities given in in the the legend are
broadly defined. Each of the five types of relatively undisturbed forest (1, lIa, llb, lIc and Ill) in in
fact comprise both virgin stands and various regeneration regeneration stages of old secondary forest. During
the second phase ofthe LUl-project the the distribution and floristic composition of these these 'variants'
are studied in more detail.
7.3 LAND MAPPING UNITS
The The characteristics of the fourteen main land mapping units of the landscape landscape ecological map are are
presented in the following section. For more elaborate descriptions of the landforms, soil types and
plant communities reference is made to the chapters 4,5 and 6. The two table below summarize
the spatial coverages of each main mapping unit.
Table 7.1a Surface Surface areas in ha of of the main land mapping mapping units
Main mapping unit Surface Surface area in in ha. ha.
Ahl 880
Am 10,060
Bhl 3,820
Bh2 13,890
Bul 5,400
Bu2 19,700 19,700
ChI ChI 4,520
CuI 31,270
Cu2 25,070
Dhl 3,310
Dpd 11,260
DuI 12,620
Du2 23,950
Ev 1,600
Total TCP 167,350
Table 7.1b Extent of of the areas influenced by shifting cultivation
Intensity of shifting cultivation
No to hardly any (u)
Low intensity (I)
High intensity (h)
Extent Extent (ha)
116,170
29,820
21,360
% of total
0.5
6.0 6.0
2.3
8.3 8.3
3.2
11.8
2.7
18.7
15.0
2.0
6.7
7.5
14.3
1.0
100.0
% % of total
7.3.1 Am: mountains above 700 m as), well drained soils
The Am land mapping units coincide with the Bingalanda mountain range in the eastern part of
the TCP area, with altitudes between 700 and 1,000 m asl. They cover a surface area of 10,000
ha. The mountainous mountainous area is strongly strongly dissected dissected and has steep steep outer outer slopes. Valley bottoms are are
narrow and cover only very limited surfaces. The soils are very very clayey and belong belong to the
70
69.4
17.8
12.8