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A Fine-Scale Conservation Plan for Cape Lowlands Renosterveld: Technical Report

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A Fine-Scale Conservation Plan for Cape Lowlands Renosterveld: Technical Report A Fine-Scale Conservation Plan for Cape Lowlands Renosterveld: Technical Report MAIN REPORT September 2003 Amrei von Hase Mathieu Rouget Kristal Maze Nick Helme Report No. CCU 2/03 Cape Conservation Unit Botanical Society of South Africa Pvt Bag X 10 7735 Claremont www.botanicalsociety.org.za/ccu Key Partners and Sponsors of the Cape Lowlands Renosterveld Project TABLE MOUNTAIN FUND 2 Acknowledgements Many individuals and organizations have contributed generously to the Cape Lowlands Renosterveld Project to whom the Botanical Society and the project team are greatly indebted. We express our appreciation to you in this section and in addition have provided acknowledgement to others in sections of this report where their contribution was relevant. We are particularly indebted to our key project partners, the Western Cape Nature Conservation Board (WCNCB), for putting their full support behind the project from its inception as well as their many contributions to the project. In Scientific Services we especially thank the late Chris Burgers, Helen de Klerk, Ernst Baard, Annelise le Roux, Guy Palmer and Andrew Turner for their guidance in the project planning and initiation stages, particularly on data and GIS matters. We are tremendously grateful to Chris who generously and infectiously shared with us his wealth of knowledge about the lowlands. In Operations we express our appreciation to the business unit managers, extension officers and regional ecologists who played a vital role particularly in shaping the final products of the project. We are especially grateful to Anton Wolfaardt and Chris Martens. Wendy Paisley of the Cape Conservation Unit (CCU) of the Botanical Society provided invaluable administrative and organizational support to the project. Our colleagues in the CCU, Mark Botha and Mandy Driver, provided keen insights and guidance to us at various stages in the project life. We owe special thanks to the CCU strategic advisor Prof Richard Cowling (from the Terrestrial Ecological Research Unit of the University of Port Elizabeth) for his exceptional vision, support and scientific inputs to the project. We thank Cecily Roos, Benis Egoh, Verna Love, Andrew Skowno and Bruce Anderson, who assisted with data collection and field work. Mandy Lombard, Charlotte Heijnis, Nick Lindenberg and Philip Desmet provided invaluable guidance on the projects GIS components. Wendy Lloyd of ARC and Dean Fairbanks of PFIAO, GIS consultants to the project, are thanked for their inputs. Species distribution data were kindly provided by the National Botanical Institute (NBI) (PRECIS, Protea Atlas Project, SARARES and SABONET), WCNCB State of Biodiversity database, Fatima Parker, Ted Oliver, Charlie Boucher, Barrie Low, Ute Schmiedel, Tony Rebelo, and John Manning who allowed us access to unpublished version of Cape Plants for drafting the list of renosterveld endemics. The Compton (NBI) and Bolus (UCT) herbaria kindly assisted Nick Helme with identification of plant specimens. Luc Chevallier and Doug Cole from the Council for Geoscience provided us with fine-scale geological maps of the region. We are most appreciative of the expert mapping inputs we received from faunal experts Jonathan Ball (Lepidoptera Society), Jonathan Colvil (UCT), Mike Picker (UCT), Kirsten Louw (UCT), David Jacobs (UCT), Rainer and Connie Krug (University of Stellenbosch), and Ernst Baard, Atherton de Villiers, Guy Palmer, Kevin Shaw and Andrew Turner (all from WCNCB Scientific Services). The Botanical Society expresses its sincere appreciation to the Table Mountain Fund of WWF-SA (supported by the Global Environmental Facility) for its generous financial support to the Cape Lowlands Project over the past three years. We are most grateful to to the Mazda Wildlife Fund, which loaned us a serviced 4x4 vehicle for three years, and to ESRI for their contribution of an ArcView and ArcGIS software grant. The generous support of these funders and companies made the project possible. Finally we express our thanks to all the committed landowners, local conservation groups and conservation extension staff who have been and will continue to be the on the ground stalwarts for lowlands conservation. We are greatly indebted to you for your support of this project and of conservation in the Renosterveld lowlands. A Fine-Scale Conservation Plan for Cape Lowlands Renosterveld: Technical Report i MAIN REPORT Contents A. Context and Background ............................................................................................................ 1 1. Introduction.................................................................................................................................1 The regional context ............................................................................................................................................................... 1 Previous conservation initiatives in the Cape lowlands................................................................................................... 2 The Cape Lowlands Renosterveld Project ......................................................................................................................... 2 Structure of this report ........................................................................................................................................................... 3 Where to obtain the project's outputs .................................................................................................................................. 4 2. The Cape Lowlands Renosterveld Region .....................................................................................6 What is renosterveld? ............................................................................................................................................................ 8 3. The Systematic Conservation Planning Approach........................................................................10 Principles and stages in systematic conservation planning........................................................................................... 10 How systematic conservation planning was applied in the Cape Lowlands Renosterveld Project........................ 11 B. The Conservation Assessment.................................................................................................. 12 4. Steps in the Conservation Assessment ........................................................................................12 5. The Planning Domain ................................................................................................................15 Choosing the preliminary planning domain ..................................................................................................................... 15 Refining the boundary of the central planning domain .................................................................................................. 15 Adding a buffer around the central planning domain..................................................................................................... 17 6. Remnants of Natural Vegetation .................................................................................................18 Why is a natural remnants layer important? .................................................................................................................... 18 Deriving a remnants layer for renosterveld ..................................................................................................................... 18 Conclusions........................................................................................................................................................................... 22 7. Vegetation Map.........................................................................................................................24 The importance of a vegetation map in conservation planning.................................................................................... 24 Vegetation mapping methodology .................................................................................................................................... 24 Statistical modelling of habitat units in the Overberg .................................................................................................... 25 Vegetation maps derived through field-based expert mapping .................................................................................... 26 Conclusions on the vegetation mapping process............................................................................................................ 29 8. Plant and Animal Species Distributions .......................................................................................31 Species data in conservation planning.............................................................................................................................. 31 Species data in the Cape Lowlands Renosterveld Project............................................................................................. 31 Data collection through field surveys............................................................................................................................... 32 Georeferencing of species from herbarium collections ................................................................................................. 36 Animal species localities – freshwater fish, amphibians and reptiles ........................................................................
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