Environmental and Social Impact Assessment of The
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Re-assessment of the Terrestrial Biodiversity (Flora and Avi-Fauna) in Bujagali, Kalagala and Isimba Hydropower Dams and Offsets, Uganda Prepared for the Darwin Initiative project: No Net Loss for Biodiversity and Communities in Uganda NatureUganda Plot 1, Katalima Crescent, Lower Naguru, Kampala. P.O. Box, 27034, Phone +256 414 540719 Email: [email protected], Website: www.natureuganda.org May 2017 Production Team Compiled by: Dr. Dianah Nalwanga, NatureUganda Contributors: Michael Opige, Judith Mirembe, Prof. Muchunguzi Edited by: Prof. EJ Milner-Gulland, Oxford University, Joseph W. Bull, Wild Business Ltd Acknowledgements This assessment was conducted with funding from the Darwin initiative under the NoNet loss project, for with we aregrateful. The partners on the project have alo been so instrumental in the success of this assessment. The experts who supported the data collection, anaylsis and writeup headed by Deo Muhumuza and Prof. Muchunguzi are highly appreciated. The technical team in the project did tremendous work in guiding the surveys, which made this project a success. The editors and advisors on this project are highly appreciated especially the advisoty committee headed by Proj. Derek E. Pomeroy and the team at Oxford University especially E.J. Milner-Gulland, Joseph Bull and Julia Baker. The staff of NU, especiallyMichael Opige and Judith Mirembe, who participated in this assessment as well as Achilles Byaruhanga, the chief advisor from NU are also appreciated. This study would not have been possible without the cooperation of the communities in the study sites who granted the study team access to their land for data collection, they are highly appreciated. 1 Table of Contents Table of Contents EXECUTIVE SUMMARY ........................................................................................................................................4 CHAPTER I ...............................................................................................................................................................7 INTRODUCTION ......................................................................................................................................................7 1.1. Background.................................................................................................................................................7 1.2. Study Site Selection ....................................................................................................................................7 1.2.1. THE EAST BANK OF THE HYDRO POWER AREA ..........................................................................8 1.2.2. THE WEST BANK OF THE HYDRO AREA ........................................................................................9 1.2.3. THE FOREST RESERVES and Kalagala-Itanda offset. .......................................................................11 1.3. General Methods ......................................................................................................................................14 CHAPTER II ............................................................................................................................................................15 FLORAL DIVERSITY ............................................................................................................................................15 2.1 INTRODUCTION ....................................................................................................................................15 2.2 METHODS AND SITE DESCRIPTION .................................................................................................15 2.2.1 Survey Methods .......................................................................................................................................15 2.2.2. Data analysis ...........................................................................................................................................16 2.2.3. Site vegetation descriptions ....................................................................................................................17 2.3 RESULTS AND DISCUSSION ...............................................................................................................39 2.3.1 Floristics ..................................................................................................................................................39 2.3.2 Species richness at the various sites ........................................................................................................40 2.3.3 Site similarity ...........................................................................................................................................44 3.4. Management options for the invasive exotic species ................................................................................46 2.3.5. A comparative overview with the previous vegetation survey done in 2006 .........................................47 2.4 CONCLUSIONS ......................................................................................................................................51 CHAPTER III ...........................................................................................................................................................52 FAUNA DIVERSITY-BIRDS .................................................................................................................................52 3.1 INTRODUCTION ....................................................................................................................................52 3.2. BIRD SURVEY METHODS ........................................................................................................................52 3.2.1. Land Bird survey Methods .....................................................................................................................52 3.2.2. Water Bird Surveys ................................................................................................................................53 2 3.2.3. Species identification ..............................................................................................................................53 3.2.4. Bird classifications .................................................................................................................................53 3.2.5. Data Analysis ..........................................................................................................................................54 3.3. RESULTS AND DISCUSSION ...............................................................................................................54 3.3.1. Land Birds ..............................................................................................................................................54 3.3.2. Waterbirds ..............................................................................................................................................59 3.3.3. Other Records .........................................................................................................................................60 3.3.4. General Discussion .................................................................................................................................61 3.3.5. Conclusions and Recommendations .......................................................................................................61 CHAPTER IV ...........................................................................................................................................................62 4.0 FINAL CONCLUSIONS ...............................................................................................................................62 5.0 REFERENCES ..............................................................................................................................................64 CHAPTER VI ...........................................................................................................................................................66 6.0 APPENDICES ................................................................................................................................................66 Appendix 1: Re-assessments of Terrestrial Ecology/Biodiversity in Bujagali and Kalagala; Records for the different species in the sutes surveyed in 2017 ....................................................................................................66 Appendix 2a: Observed species, Families and Genera of the plant at various sites, 2017 ...................................86 Appendix 2b: Summary of observed species, Families, Genera and other classifications of the plant at various sites, 2017 .............................................................................................................................................................87 Appendix 2c: Observed Invasive plant species at various sites, 2017 .................................................................89 Appendix 3.1: Relative Abundance for the Land Bird Species Recorded in different sites during the three different years .......................................................................................................................................................90 Appendix 3.2: Relative abundances of water birds recorded in the sites in the surveys conducted in the three years ....................................................................................................................................................................107