serikali ya mapinduzi zanzibar care tanzania and department

prone to decimation from harvesting. Second, they are prominent environmentally, as
they are the keystone forest species forming tree canopy and helping to stabilize the
environment by fixing CO 2 , preventing soil erosion and sustaining the water reservoir
in the ecosystem. The trees are dominant ecologically as they determine a wealth of
interactions. Conservation in situ is the primary method to sustain target species from
decline and safeguard their genetic resources (Frankel et al. 1995).
Table 4.10: Threatened plant species of Ngezi forest reserve, Pemba
Species name Pressures and Conservation values Conservation
threats
measures
Afzelia quanzensis Exploited for timber, Not in IUCN; but in Forest Experimental plots
fuel wood. Timber Ordinance, threatened for plantation
status insufficiently
exports trade by
(Annon.1902,
identified
Arabs since 1900.
Wood 1966)
(Moomaw 1960)
considers it as
premium timber for
high class.
Aloe masawana
Antiaris toxicaria
Manilkara
sansibarensis
Dalbergia
melanoxylon
Acampe sp.
(Orchidaceae)
Forest disturbance
and collected for
medicine and
gardens
Lesser timber value
for construction,
plywood, flooring,
crates
Timber resistant to
wear and tear.
Heavily exploited,
durable in water,
dhow building
Special wood for
carvings
Harvest for garden
plants. Threatened
category
All Aloe spp. in
Appendix II (other 5
Aloes from S. Africa
in Appendix I)
Key species in moist
forest protects
epiphytes like Vittaria
elongate, Pemba
flying fox roosting
trees and bird nest
Not included in the
Red list
Not included in IUCN,
but being discussed as
a threatened species;
but in Red List
Summary Report
2000, LR/nt
All Acampe spp. in
Appendix II
Ex situ protection
in government
garden. Restrict
collection
Restrict cutting for
timber
In situ
conservation.
Control its being
harvested from
forest reserve.
Does well in
plantation
Protect tree
harvests
Aerangis hologlatis Threatened category Appendix II Control harvests
Bulbophyllum sp. Threatened category All spp. in App. II Restrict harvesting
Calanthe volkensii Threatened category All spp. in App. II Restrict harvesting
Disperis johnstonii Threatened category All spp. in App. II Restrict harvesting
Eulophia sp. Threatened category All spp. in App. II Restrict harvesting
Nervilea umbrosa Threatened category All spp. in App. II Restrict harvesting
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