Ecology and Development Series No. 10, 2003 - ZEF

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Floristic analysis of the undisturbed foreststorey of less than 10 m are Clausena anisata, Coffea arabica, Dracaena fragrans, Ehretiacymosa, Maytenus gracilipes, Rhus ruspoli, and Senna petersiana. Coffea arabica is themost dominant species in this stratum. The major climber species in this group areHippocratea africana, Landolphia buchananii, and Paullinia pinnata. Most of the treespecies in this group are Afromontane endemics or near-endemics (e.g., Bersamaabyssinica, Cassipourea malosana, Canthium oligocarpum, Coffea arabica, Veprisdainelli, Albizia grandibracteata, Olea capensis ssp. welwitschii, Prunus africana,Trichilia. dregeana, and Mimusops kummel), and some Guineo-Congolian forest species(e.g., Anthiaris toxicaria, Ehretia cymosa, and Dracaena fragrans).Group 2 comprises 21 plots; 34 species are associated with the group. The grouphas 3 indicator species with significant indicator values, namely: Argomuelleramacrophylla, Justicia betonica and Ekebergia capensis (Table 4.2). The common treespecies in the canopy layer are: Albizia grandibracteata, Blighia unijugata, Celtis africana,Cordia africana, Croton macrostachyus, Diospyros abyssinica, Elaeodendron buchananii,Ekebergia capensis, Mimusops kummel, and Trichilia dregeana. Common tree species inthe middle storey include Canthium giordanii, Canthium oligocarpum, Millettia ferruginea,Ritchiea albersii, Olea capensis ssp. hochstetteri, Teclea noblis and Vepris dainelli. Smalltrees and shrubs with higher representation in the lower storey include: Argomuelleramacrophylla, Celtis toka, Clausena anisata, Dracaena fragrans, Dracaena steudneri,Eugenia bukobensis, Justicia betonica, Justicia schimperiana, Maytenus gracilipes,Phyllanthus ovalifolius, and Rhus ruspoli. Argomuellera macrophylla is the most abundantplant species in this storey. The major climber species in this community type areCombretum paniculatum, Gouania longispicata, Hippocratea africana, Landolphiabuchananii, Paullinia pinnata, Pterolobium stellatum, and Tiliachora troupinii. The majortree species in this community are Afromontane endemic and near-endemic (e.g., Albiziagrandibracteata, Ekebergia capensis, Millettia ferruginea, Mimusops kummel, Oleacapensis ssp. hochstetteri, Ritchiea albersii, Trichilia dregeana, and Vepris dainelli). Thereare also many Guineo-Congolian forest tree species, some of which are the dominantspecies in the group (e.g., Argomuellera macrophylla, Blighia unijugata, Celtis africana,Dracaena fragrans, Ehretia cymosa, Sapium ellipticum, and Trilepisium madagascariense).51
Floristic analysis of the undisturbed forestGroup 3 comprises 13 plots; 13 species are associated with this group. It has threeindicator species with significant indicator values, namely: Draceana fragrans, Tecleanoblis, and Phoenix reclinata (Table 4.2). The common tree species in the canopy layer are:Albizia grandibracteata, Anthiaris toxicaria, Diospyros abyssinica, Morus mesozygia, andTrilepisium madagascariense, while the common tree species in the middle storey areCanthium giordanii, Olea capensis ssp. hochstetteri, Phoenix reclinata, Ritchiea albersii,Teclea noblis and Vepris dainelli. The common species in the lower storey areArgomuellera macrophylla and Dracaena fragrans; the common climber species in thisgroup are Combretum paniculatum, Landolphia buchananii and Tiliachora troupinii. Likethe other two groups, this group also has many Afromontane endemic and near-endemicspecies (e.g., Albizia grandibracteata, Olea capensis ssp. hochstetteri, Teclea noblis, andVepris dainelli), and the Guineo-Congolian forest species (e.g., Argomuellera macrophylla,Anthiaris toxicaria, Diospyros abyssinica, Dracaena fragrans Morus mesozygia, andTrilepisium madagascariense).4.3.3 OrdinationOrdination was performed using PCA (Ter Braak and Šmilauer 1998). The results of thePCA ordination are presented in Figure 4.2, Tables 4.4 and 4.5. The first four PCA axesexplain 81.1% of the variation in species data, with the first two axes accounting for 64.1%of the variation (Table 4.4).Table 4.3. Percentage variance explained by the first four PCA axesAxis I II III IV TotalvarianceEigenvalues 0.408 0.233 0.111 0.058 1Cumulative % variance of species data 40.8 64.1 75.3 81.1Total eigenvalues 1The distribution pattern of most species in the species-plots biplot was denselyconcentrated around the center of the ordination space where the two axes cross each other.For clarity, only the indicator species for the community types were shown in the biplot(Figure 4.2). A list of the plant species with an absolute value species score greater than or52
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Wäldern weist im Wesentlichen zwei
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4.4 Discussion ....................
Page 8 and 9: General introduction1 GENERAL INTRO
Page 10 and 11: General introductionoutbreaks and e
Page 12 and 13: General introductionunfavorable cha
Page 14 and 15: General introductionand their patte
Page 16 and 17: Current state of knowledge2 STATE O
Page 18 and 19: Current state of knowledgeThe studi
Page 20 and 21: Current state of knowledgemore prom
Page 22 and 23: Current state of knowledge2.2 Taxon
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Page 26 and 27: Current state of knowledgecultivars
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Page 36 and 37: Description of the study area and s
Page 42 and 43: Floristic analysis of the undisturb
Page 74 and 75: Impacts of human use on the forest
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Conservation of the wild Coffea ara
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Conclusions and recommendations7 CO
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Conclusions and recommendations3. R
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ReferencesBatisse M. 1986 Developin
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ReferencesDavis A.P. and Rokotonaso
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ReferencesESRI. 1996. ArcView GIS:
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ReferencesIUCN 1992. Protected Area
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ReferencesMesfin Ameha and Bayetta
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ReferencesSmith R.F. 1985. A histor
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ReferencesVan Jaarsveld A.S., Freit
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Appendices9 APPENDICESAppendix 1 Li
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AppendicesD. repandum (Vahl) DC, [H
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AppendicesSapotaceaeAningeria altis
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AppendicesAppendix 3 Families of va
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AppendicesAppendix 5. ANOVA tables:
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AppendicesAppendix 7 Height class d
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AppendicesGFUNDFOR OLSFOR SF-NEW SF
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AppendicesAppendix 10. List of loca
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AppendicesNumber Family name Scient
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AppendicesNumber Family name Scient
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ACKNOWLEDGEMENTSI am very grateful
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Ecology and Development Series No. 10, 2003 - ZEF

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