(Apis Mellifera Capensis) at a Site in the Eastern Cape, South Africa

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(Apis Mellifera Capensis) at a Site in the Eastern Cape, South Africa BOTANICAL INVENTORY AND PHENOLOGY IN RELATION TO FORAGING BEHAVIOUR OF THE CAPE HONEYBEES (APIS MELLIFERA CAPENSIS) AT A SITE IN THE EASTERN CAPE, SOUTH AFRICA. THESIS Submitted in fulfilment of the requirements for the Degree of MASTER OF SCIENCE, RHODES UNIVERSITY By ADMASSU ADDI MERTI April 2003 DECLARATION The Registrar (Academic), Rhodes University. Dear Sir, I, Admassu Adi Merti (Student no: g01m3960) here by declare that the thesis entitled “BOTANICAL INVENTORY AND PHENOLOGY IN RELATION TO FORAGING BEHAVIOUR OF THE CAPE HONEYBEES (Apis mellifera capensis) AT A SITE IN THE EASTERN CAPE, SOUTH AFRICA” is the result of my own investigation and research under the supervision of Mr. Peter Phillipson; and that it has not been submitted in-part or in-full for any other degree or to any other University. Signature…………………………………….Date…………………………………… ii TABLE OF CONTENTS TABLE OF CONTENTS ........................................................................................................iii LIST OF TABLES ..................................................................................................................vi ACKNOWLEDGEMENTS ...................................................................................................vii ABSTRACT ..........................................................................................................................viii LIST OF FIGURES..................................................................................................................x LIST OF PLATES..................................................................................................................xii LIST OF APPENDICES .......................................................................................................xiii CHAPTER 1 INTRODUCTION..............................................................................................1 General Introduction.............................................................................................................1 1.1.1 Phytochorological regions of Southern Africa ............................................................2 1.1.2 The relationship between plants and honeybees: ........................................................5 1.2 The flora and vegetation of Cape Floral Kingdom.........................................................5 1.3 Vegetation of the Eastern Cape ......................................................................................7 1.4 Plant diversity Hot spots...............................................................................................10 1.5 Taxonomy and distribution of honeybees. ...................................................................13 1.6 History of bee plant identification in South Africa ......................................................14 1.7 Economic significance and conservation of honeybees ...............................................15 1.8 Phenology of flowering and Cape honeybee colony cycle...........................................17 1.9 Research questions .......................................................................................................17 1.10 Aims and Objectives...................................................................................................18 1.11 The study area.............................................................................................................19 2.1 Introduction ..................................................................................................................21 2.1.1 Vegetation of study area............................................................................................21 2.1.2 Geology of the study area..........................................................................................21 2.1.3 Soils ...........................................................................................................................23 2.1.4 Climate ......................................................................................................................23 2.2 Materials and Methods .................................................................................................26 2.2.1 Determination of endemism and phytochorological affinities of the study area.......26 2.2.2 Vegetation sampling..................................................................................................26 2.2.3 Classification of vegetation .......................................................................................27 2.2.4 Plant specimen collection and identification.............................................................28 2.3.1 Analysis of the flora ..................................................................................................29 2.3.1.1 Endemic plant species. ...........................................................................................32 2.3.1.2 Phytochorological relation of the flora...................................................................33 iii 2.3.1.3 Vegetation classification.........................................................................................34 2.3.2 Community description .............................................................................................37 2.3.2.1 Forest vegetation ....................................................................................................37 2.3.2.2 Bushclump vegetation type ....................................................................................38 2.3.2.3 Acacia savanna vegetation type..............................................................................39 2.3.2.4 Grassland vegetation type.......................................................................................41 2.3.2.6 Fynbos vegetation type...........................................................................................43 2.3.2.7 Shrubland vegetation type ......................................................................................44 2.3.3 Ordination..................................................................................................................45 2.4. Discussion....................................................................................................................48 2.4.1 Floristic analysis of the area ......................................................................................48 2.4.1.1 Endemic plant species ............................................................................................48 2.4.1.2 Phytochrological affinity of the area ......................................................................49 2.4.2 The plant communities ..............................................................................................50 2.5 Conclusion....................................................................................................................52 CHAPTER 3 OBSERVATION OF FLORAL RESOURCE UTILIZATION AND POLLEN COLLECTION BY APIS MELLIFERA CAPENSIS AT RIVENDELL FARM....54 3.1 INTRODUCTION........................................................................................................54 3.2 MATERIALS AND METHODS .................................................................................56 3.2.1 Bee observation .........................................................................................................56 3.2.2 Nectar and pollen collection by bees.........................................................................56 3.2.3 Preparation of reference slides ..................................................................................57 3.2.4 Pollen trapping...........................................................................................................57 3.2.5 Analysis of pollen......................................................................................................58 3.2.6 Protein determination ................................................................................................58 3.2.7 Brood population .......................................................................................................58 3.3. Results .........................................................................................................................59 3.3.1 Nectar and pollen source plant species......................................................................59 3.3.2 Determination of the weight of the pollen by source plant .......................................64 3.3.3 Daily incoming pollen weight ...................................................................................68 3.3.4 Seasonal availability of pollen...................................................................................69 3.3.5 Distribution of pollen source plants in relation to Cape honeybees..........................70 3.3.6 Protein determination ................................................................................................73 3.3.7 Brood population .......................................................................................................75 3.4 Discussion.....................................................................................................................76 iv 3.4.1 Bee observation .........................................................................................................76 3.4.2 Pollen collection ........................................................................................................78 3.5. Conclusion...................................................................................................................80
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