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3.5.2 Summary of rattan stocking and abundance by site Table 3. Rattan abundance and stocking for Campo Laccosperma Laccosperma Eremospatha Oncocalamus opacum robustum hookeri mannii Mean # of individuals/ha -1 47 87 3 5 Mean # of clumps / ha -1 - 4 1 - Mean # of mature stems / cluster - 14 1 - Mean # of mature stems / ha -1 - 56 1 - Mean total mature stem length (m/ha -1) - 1,181 20 - Mean stem length / individual (m/ha -1) - 21 20 - Mean total harvestable cane length (m/ha -1) - 305 0 - % total stem length harvestable - 26% 0% - Table 4. Rattan abundance and stocking for Mokoko Mean # of individuals/ha - 1 Mean # of clumps / ha - 1 Mean # of mature stems / cluster Mean # of mature stems / ha – 1 Mean total mature stem length (m/ha –1) Mean stem length / individual (m/ha –1) Mean total harvestable cane length (m/ha –1) % total stem length harvestable Laccosperma Laccosperma Eremospatha Eremospatha Eremospatha opacum secundiflorum hookeri wendlandiana macrocarpa 92 42 4 2 4 - 3 - - 1 - 11 - - 13 - 33 - - 13 - 316 - - 169 - 95 - - 13 - 80 - - 63 - 25% - - 37% 186
Table 5. Rattan abundance and stocking for Takamanda Laccosperma Laccosperma Eremospatha Eremospatha opacum secundiflorum tessmanniana macrocarpa Mean # of individuals/ha -1 47 330 3 134 Mean # of clumps / ha -1 - 4 3 3 Mean # of mature stems / cluster - 15 9 9 Mean # of mature stems / ha -1 - 59 9 26 Mean total mature stem length (m/ha -1) - 1,011 184 435 Mean stem length / individual (m/ha -1) - 17 20.4 20.4 Mean total harvestable cane length (m/ha -1) - 256 0 184 % total stem length harvestable - 25% 0% 42% 3.6 DISCUSSION 3.6.1 Floristic diversity and similarity Species diversity for each site was assessed using the Shannon-Weaver index 7 . Based on the distribution of individuals among the different species, Mokoko is the most diverse site (H = 2.81) followed by the Takamanda FR (H = 2.66) and the Campo FR (H = 2.58). This study correlates closely with previous estimates of species diversity for Campo (Sunderland et al., 1997) and Mokoko (Thomas, 1994). The figures for Takamanda represent the results of the first vegetation study in that area. In many respects, the estimates of species diversity by this study follow the general perception that forests with greater rainfall and more heterogeneous forest, are known to harbour a greater number, and range, of species (Maley, 1996; Sosef, 1996). Hence it is unsurprising that Campo, with less annual rainfall (and two distinct dry seasons) is characterised by a relatively homogenous forest formation and possesses the least diversity of species of the three sites. In terms of similarity (i.e. shared taxa), the application of both Sorenson’s coefficient and Jaccard’s coefficient suggests that closer floristic affinities are shared between Takamanda and Campo, with Mokoko possessing a greater number of species unique to that site. The is undoubtedly due to the fact that the lowland forests of the Mount 187
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THE TAXONOMY, ECOLOGY AND UTILISATI
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The final Chapter presents summaris
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CHAPTER TWO TAXONOMIC ACCOUNT 2.1.
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3.3.3.2. Climate 180 3.3.3.3. Topog
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CHAPTER SEVEN A SOCIO-ECONOMIC PROF
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REFERENCES 290 APPENDIX ONE INDIGEN
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Figure 42. Distribution of O. tuley
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Figure 110. How many years spent in
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ACKNOWLEDGEMENTS This work would no
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ecommended this project be funded b
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CHAPTER ONE MORPHOLOGY AND BIOGEOGR
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Similar branching of the stem is al
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The growing point of the stem of ra
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Aerial roots are commonly encounter
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sloughing of the sheath spines part
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For many of the species of Eremospa
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Figure 3. Acanthophylls of Laccospe
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In common with other members of the
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exception to this is Laccosperma op
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of overall diversity, when compared
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CHAPTER TWO TAXONOMIC ACCOUNT “Ta
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It is somewhat surpising that since
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evidence suggests that the climbing
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2.5. KEY TO THE GENERA Rattans clim
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horizontal, peduncle enclosed withi
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Knee absent: Stem ± triangular in
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15 cm broad, deeply notched with ro
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Distribution This species occurs fr
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Bot. Appl. 17: 896 (1936); Renier i
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Figure 3. Eremospatha cabrae (De Wi
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sterile, 1904 (BR!); Cabra s.n., Ma
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Figure 5. Eremospatha laurentii De
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(SCA!); de Wilde 2183, 60km S of Es
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long, decreasing distally, rachilla
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Distribution E. wendlandiana is dis
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indumentum; ocrea obliquely truncat
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Distribution E. barendii is known f
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stems sessile, up to 3.5 m long; ra
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Distribution E. macrocarpa is a ver
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(YA!); Letouzey 12563, Lac Tissongo
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and sparse distally; leaflets 8-14
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Distribution E. haullevilleana is r
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FHO!, BR!); Louis 9560, 20km W of Y
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order region of Cameroon and the Ri
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pairs c.3 cm long, at 45° angle to
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Figure 17. Eremospatha cuspidata (G
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ase, entire and acuminate to irregu
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Figure 19. Eremospatha tessmanniana
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LACCOSPERMA (G. Mann & H. Wendl.) D
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Habitat and distribution The genus
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(1929); Hutch. in F.W.TA. 2: 391 (1
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Habitat and ecology Tolerant of dee
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Figure 21. Laccosperma opacum (G. M
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± concolorous with prominent trans
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December 6, 1984 (WAG!); le Testu 1
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Figure 31. Laccosperma acutiflorum
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(06.09N:01.53W) Fl., June 1972 (MO!
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portion of stem; peduncle 12-20 cm
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Distribution L. robustum is very co
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1997 (K!, EG!, BH!); Sunderland 179
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own indumentum below; leaflets comp
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Distribution This species is distri
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French). A brief discussion of this
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Imperfectly-known taxon Laccosperma
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ONCOCALAMUS (G. Mann & H. Wendl.) H
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Key to the species of Oncocalamus M
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moderately to sparsely armed with b
Page 135 and 136: Distribution O. mannii is restricte
Page 137 and 138: often concentrated on the sheath ap
Page 139 and 140: Distribution O. macrospathus is dis
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Page 143 and 144: Distribution This species is restri
Page 145 and 146: ocrea, often sloughing off to leave
Page 147 and 148: Notes O. wrightianus is distinct fr
Page 149 and 150: CALAMUS L. (Greek = a reed) L. in S
Page 151 and 152: Robyns & Tournay in Fl. du Parc Nat
Page 153 and 154: prickle-like spines; bracts tightly
Page 155 and 156: Distribution C. deërratus is the m
Page 157 and 158: (06.05N:00.50W) pist., March 17, 19
Page 159 and 160: MIXED COLLECTIONS A number of colle
Page 161 and 162: Figure 51. E. macrocarpa seedling,
Page 163 and 164: Figure 59. E. cuspidata, Etembue, E
Page 165 and 166: Figure 67. L. secundiflorum, Ghana
Page 167 and 168: Figure 75. O. mannii, Ayemaken, Equ
Page 169 and 170: CHAPTER THREE RATTAN DIVERSITY AND
Page 171 and 172: an inventory or survey. These param
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Page 175 and 176: 3.3.1.2 Climate The Campo Reserve h
Page 177 and 178: the reserve has no management plan
Page 179 and 180: associated with drier forest, was c
Page 181 and 182: the lowland forest is characterised
Page 183 and 184: sampling intensities were much lowe
Page 185: seedling 6 or length of stem) were
Page 189 and 190: sampling of the rattan population,
Page 191 and 192: concentrated, not only on rattan, b
Page 193 and 194: Table 10. A comparison of rattan di
Page 195 and 196: 4.1 INTRODUCTION CHAPTER FOUR RATTA
Page 197 and 198: the palm hearts from ground-level (
Page 199 and 200: feed on these fruits for long perio
Page 201 and 202: the genus Ceratogymna have been rec
Page 203 and 204: latter situation has been observed
Page 205 and 206: Hollow sheaths Some species of ant
Page 207 and 208: Table 15. Count of domatia and ratt
Page 209 and 210: Figure 85. Ant colonisation of leaf
Page 211 and 212: (Fisher et al., 1987), followed by
Page 213 and 214: Table 16. Hapaxanthy in the Palmae
Page 215 and 216: Figure 89. Lateral inflorescences o
Page 217 and 218: the absence of primate dispersers i
Page 219 and 220: CHAPTER SIX INDIGENOUS NOMENCLATURE
Page 221: The extensive nature and wide range
Page 224 and 225: Table 18. Summary of the non-cane u
Page 226 and 227: 1977; Berlin, 1992). This hypothesi
Page 228 and 229: taxonomies are included in (or affi
Page 230 and 231: taxa (standing palms) within their
Page 232 and 233: Table 19. Life form, intermediate a
Page 234 and 235: For example, the Anyang of Cameroon
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Box 2. The structure of vernacular
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intermediate categories for African
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hoped that any future development o
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242
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CHAPTER SEVEN A SOCIO-ECONOMIC PROF
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Interestingly, the patterns of expl
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Figure 99. Scatterplot of size of m
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forest products (see Box 3) these a
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Figure 101. Mean range (or distance
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aid a wage. In fact, quite the oppo
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7.5.3 Socio-economic profile of the
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7.5.3.5 Previous occupations A larg
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the rainy season when transport dif
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Figure 114. Cited reasons for decli
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service. Unemployment increased fro
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Figure 116. Correlation between ran
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enefits rattan brings, those artisa
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from enabling the sustainable explo
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Figure 119. Woven basket products m
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such as Indonesia have lifted the b
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press; this study) and the conditio
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Table 31. Findings and recommendati
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of this trade, in fiscal terms, to
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Not threatened (species distributio
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clears the plot again to plant food
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forest products, such as rattan for
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from the informal forest economy an
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REFERENCES Abbiw, D. 1990. The usef
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Belcher, B. 1999. A production to c
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Burkill, I.H. 1935. A dictionary of
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Dalziel, J.M. 1937. The useful plan
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Dransfield, J. 1988b. The palms of
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Fisher, J.B. & J. Dransfield. 1977.
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Hall, J.B. & M.D. Swaine. 1981. Dis
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Huxley, C.R. 1978. The ant-plants M
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Lee, Y.F. 1993. Some models for est
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Moore, H.A. 1973. Palms in the trop
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Oteng-Amoako, A.A. & B. Obiri-Darko
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Randall, R. & E. Hunn. 1984. Do lif
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Siebert, S.F. 1997. Economically im
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Tenati, G. [in press]. The use of r
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Weiner, G. and Liese, W. 1989. Anat
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APPENDIX ONE INDIGENOUS NOMENCLATUR
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and Uganda, in the absence of large
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E. cuspidata (G. Mann & H. Wendl.)
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also a strong binding material (Rus
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(unpubl. notes): BENIN: Profizi (19
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L. laeve (G. Mann & H. Wendl.) H. W
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The “palm heart” is eaten widel
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A tea made from the young shoots is
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O. wrightianus Hutch. Vernacular na
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Bidgood & Vollesen: Tanzania; 3040
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Dransfield: Cameroon; 6998, 6999, 7
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Heudelot: Gambia; 372 Hoier: DR Con
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Lowe: Nigeria; 2792, 2793, 4353, Ca
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Reitsma: Gabon; 1340, 2047, 2151, 2
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Webb & Bullock: Cameroon; 310 Welle
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APPENDIX FOUR SOCIO-ECONOMIC SURVEY
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a) high forest b)farm c)fallow d) d
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APPENDIX FIVE PUBLICATIONS AND DISS
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DISSEMINATION 1. Sunderland, T.C.H.
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