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SEYCHELLES KEY BIODIVERSITY AREAS Output 6: Patterns Of GOS- UNDP-GEF Mainstreaming Biodiversity Management into Production Sector Activities SEYCHELLES KEY BIODIVERSITY AREAS Output 6: Patterns of conservation value in the inner islands by Bruno Senterre Elvina Henriette Lindsay Chong-Seng Justin Gerlach James Mougal Terence Vel Gérard Rocamora (Final report of consultancy) 14 th August 2013 CONTENT I INTRODUCTION ........................................................................................ 4 I.1 BACKGROUND .................................................................................................. 4 I.2 AIM OF THE CURRENT REPORT ........................................................................... 5 II METHODOLOGY ....................................................................................... 6 II.1 AMOUNT AND TYPES OF DATA COMPILED ........................................................... 6 II.1.1 Plants ............................................................................................................. 6 II.1.2 Animals .......................................................................................................... 9 II.2 EXPLORATION INDEX ...................................................................................... 10 II.3 BIODIVERSITY AND CONSERVATION INDEX ...................................................... 11 III RESULTS AND DISCUSSION ...................................................................13 III.1 PATTERNS OF EXPLORATION ............................................................................ 13 III.1.1 Plants ............................................................................................................13 III.1.2 Animals .........................................................................................................16 III.2 TAXONOMIC (RE )DISCOVERIES ........................................................................ 17 III.2.1 Plants ............................................................................................................17 III.2.2 Animals .........................................................................................................20 III.3 PATTERNS OF BIODIVERSITY ............................................................................ 22 III.3.1 Plants ............................................................................................................22 III.3.2 Animals .........................................................................................................25 III.4 PATTERNS OF CONSERVATION VALUE .............................................................. 25 III.4.1 Plants ............................................................................................................25 III.4.2 Animals .........................................................................................................28 III.5 REVIEWING AND UPDATING THE SYSTEM OF KBA S .......................................... 29 III.5.1 Mahé & satellite islands.................................................................................30 III.5.2 Praslin, Curieuse, Cousin & Aride .................................................................33 III.5.3 Silhouette ......................................................................................................34 III.5.4 La Digue, Félicité & Marianne ......................................................................35 III.5.5 Other KBAs (to be further studied for conservation value) .............................36 III.6 ASSESSING THE SYSTEM OF PROTECTED AREAS AND PRIORITIZING KBA S ......... 37 IV CONCLUSION AND RECOMMENDATIONS .........................................40 IV.1 KBA S PRIORITIZED ......................................................................................... 40 IV.2 MAIN OUTPUTS AND TOOLS PRODUCED ............................................................ 40 IV.3 RECOMMENDATIONS ON FUTURE RESEARCH IN PRIORITY AREAS ....................... 41 V BIBLIOGRAPHY ........................................................................................44 VI ANNEXES ....................................................................................................45 Senterre et al. 2013 – Seychelles KBAs - Patterns of conservation value 2 EXECUTIVE SUMMARY The Seychelles archipelago includes about 155 islands and has a land area of 45,538 ha. Conservation priorities have been studied mostly since the 1960s and resulted in a system of protected areas which represents 46.6 % of the land area. Nevertheless, if we consider the inner islands (24,406 ha), there are 22.3 % of terrestrial areas with a protection status. Therefore, the government of Seychelles has decided to further investigate the patterns of conservation value for the inner islands which are more concerned with human development. We selected a list of 776 species of special concern (152 vascular plants, 14 amphibians, 21 birds, 5 freshwater fishes, 2 mammals, 19 reptiles, 563 terrestrial and freshwater invertebrates) which are considered as well inventoried and have an important conservation value. For these species, we compiled 5493 records of plants and 2672 records of animals, using literature, existing specimens, and new field inventories. In order to analyze the patterns of exploration, we used plants species records for species of special concern plus all other vascular plants (21,068 records). The patterns of conservation value are calculated using weighted endemism with a 500 x 500 m grid, i.e. the sum for each grid cell of the range-size rarity of all species of special concern present in that grid cell (where range-size rarity for a given species = 1 / number of grid cells of occurrence of that species). For vascular plants, most of the existing knowledge is compiled and the contribution from our new field inventories represents 19 % of all records, up to 33 % if we consider only data with accurate geographical precision. The other most important contribution comes from a project led by Plant Conservation Action group (PCA) and the Natural History Museum, in 2011- 2012, corresponding to 29 % of all records and 50 % of the data with accurate geographical precision. Within 18,835 ha of land area without protection status in the inner islands, we identified 2,169 ha as being priority for extension of the current system of protected areas: Montagne Planneau range (Mahé), Southern slopes of Fond Azore (Praslin), Montagne Corail-Collines du Sud (Mahé) and Montagne Brûlée-Piton de l'Eboulis (Mahé). Geographic data used to assess conservation values are also made available to the government of Seychelles, including a grid of conservation values, species distribution maps, a prioritized system of protected areas and other key biodiversity areas, and a database containing the raw data. Recommendations are proposed for the ongoing development of these tools and of the research on taxonomy and on the patterns of biodiversity-conservation. ACKNOWLEDGEMENTS We are grateful to the Global Environment Facility (GEF), for funding this study, to the United Nations Development Programme (UNDP), and to the Government of Seychelles for their support. We are also very grateful to all the different actors who have participated to the field work, including local ENGOs, government, independent consultants and the Université Libre de Bruxelles. We also thank Laurie Renguet, Nicole Labiche-Barreau and Charles Morel for their contribution in the entry of historical data and specimens. The basic shapefiles and GIS data used in this study have been provided by the Ministry of Land Use and Habitat. Finally, we would like to thank the collaborators overseas who have provided support for species identification (Germinal Rouhan, Paris, Jérôme Degreef, Brussels, Jean-Yves Dubuisson, Paris, Maarten Christenhusz, Kew, Philippe Keith, Paris), and all stakeholders consulted or reviewers (Olivier J. Hardy, Andrew Grieser Johns, Katy Beaver) who have contributed to discuss this final document. Senterre et al. 2013 – Seychelles KBAs - Patterns of conservation value 3 I INTRODUCTION I.1 Background The “ Mainstreaming Biodiversity Management into Production Sector Activities ” (or “Mainstreaming Biodiversity”) Full sized Project was signed in October 2007 between the Government of Seychelles (GOS) and the United Nations Development Programme (UNDP), and is funded by a Global Environment Facility (GEF) grant of US$3,600,000. The project is part of the UNDP-GEF portfolio in Seychelles and is implemented under a Programme Coordination Unit (PCU). The objective of the project is to integrate biodiversity conservation into key production sectors of the economy. One of the means of achieving this objective is to seek integration of biodiversity conservation in land use planning and management. The Programme Coordination Unit (PCU) has contracted the present group of consultants to undertake the following medium-term (18 months), part-time assignment: “Assessment of areas of high biodiversity for informed decision-making in future land use planning and management ”. This study represents a total of 750 days of consultancy (see Appendix 7) distributed among the following team of consultants: Bruno Senterre, Elvina Henriette, Justin Gerlach, Terence Vel, Victorin Laboudallon, Gérard Rocamora, Lindsay Chong-Seng, James Mougal, Perley Constance, André Labiche, Roland Nolin, Katy Beaver. In addition, the study received the participation of several contributors: Wilna Accouche, Gilberte Gendron, Nicole Labiche-Barreau, Charles Morel, Elke
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