serikali ya mapinduzi zanzibar care tanzania and department

2 Coastal evergreen Dry forest on sandy soils 196.3000
3 Mangroves 303.9660
4 Moist forest 906.7000
5 Erica bushland 207.7000
6 Coastal Dry evergreen forest on coral rag 59.3000
7 Coastal evergreen thicket 113.3000
8 Raphia stand 41.0070
9 Rice field landscape 59.4500
10 Rubber plantation 47.8300
11 Cultivated area 73.1400
12 Swamp forest 109.3000
13 Quassia indica stand 1.0770
14 Typhonodorum 14.7300
15 Maeopsis mixed moist forest 92.1800
16 Terminalia ivorensis 10.5360
Total cover 2,239.2618
Source: This survey, January 2005
4.1.2.1 Natural Moist forest
This includes both natural undisturbed and disturbed forests. Appreciably high
amount of precipitation is experienced on the Pemba Island (Wete - 1964mm). Thus
this amount is sufficient to drain the soils adequate moisture for supporting a rain
forest. The forest is rich in species composition of up to 40 trees per ha. (Table 4.2).
The moist forest compares to the Zanzibar – Inhambane undifferentiated forest (White
1983) that occurs in the lowland coastal forests. They form main canopy at 15-20m,
and from its emergent rise to heights of 30-40m (Table 4.2). Very few trees are taller
than 40-50m. Lianas and climbers are plentiful, but vascular epiphytes (6 orchid
species mainly on Baringtonia on river and swamp banks and fens, Vittaria and
Asplenium ridus are most widespread.
The larger trees include Albizia adianthifolia (20-30m), Antiaris toxicaria (30m high,
dbh 0.5 – 1.50m), Quassia (30-40m high, dbh 0.5 – 1.45m), Bombax (40m high, dbh
2.74m), Milicia excelsa (30-35m but all timber trees have been exhausted),
Erythrophloeum suaveolens (25-49m tall, dbh 0.35 – 45m), Inhambanella henriquesii
(25m), Manilkara sansibarensis (25m), Macaranga capensis (25m), Pouteria
brevipes (25m), Bombax rhodognaphalon (35m, Uapaca guineensis (25m high,
0.73m dbh).
In the lower tree canopy class group 5-10m tree density is highest containing 162
trees. The middle class layers include few trees 11-20m high (about 127 trees from 8
plot samples). They include Chrysalidocarpus (15-18m high, dbh 0.20-0.35m),
Alangium salicifolia (15 high, 0.7 dbh), Elaeis guineensis (10-15m), and Pouteria
brevipes (10-20m high). There are more trees in the 5-10m class (162) distribution
compared to other vegetation types in the same class distribution group.
The Barringtonia racemosa areas were encountered in transect 1 between plots 3 and
4. Barringtonia racemosa has very dominant tree stands representing 90% of all trees
in the plot. Other species are Lannea schweinfurthii (2%), Elaeis guineensis (3%), and
Garcinia livingstonei (5%). The trees are 5-10m tall, with plenty of epiphytic orchids
on Barringtonia. There are no lianas and canopy cover is over 90%. Two seasonal
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