APPENDIX 5: A review of the species-, population- and spatially-driven processes involving the medium- to large-sized mammals. FINAL VERSION CONSERVATION PLANNING IN THE GREATER ADDO NATIONAL PARK A REVIEW OF THE SPECIES-, POPULATION- AND SPATIALLY-DRIVEN PROCESSES INVOLVING THE MEDIUM- TO LARGE-SIZED MAMMALS A F Boshoff, G I H Kerley, R M Cowling & S L Wilson Terrestrial Ecology Research Unit University of Port Elizabeth P O Box 1600 Port Elizabeth 6000 South Africa Report No. 34 November 2001 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 CONTENTS Introduction ..........................................................................................................2 Processes 1. Species-driven processes ........................................................................2 2. Population-driven processes ...................................................................4 3. Spatially-driven processes ......................................................................7 Acknowledgements..............................................................................................7 References ............................................................................................................7 Tables....................................................................................................................9 Annex ...................................................................................................................13 Appendix 5, page 1 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 INTRODUCTION The Global Environment Facility (GEF) has provided a PDF Block B grant to South African National Parks to prepare a full proposal to the GEF for the planning and establishment of a “greater” Addo Elephant National Park. The concept of the Greater Addo National Park Initiative (GANP) is described in Kerley & Boshoff 1997. Systematic conservation planning forms an integral and critical component of the PDF B project. The conservation planning exercise requires that the main processes that are mediated by certain of the larger mammals, and other taxa, as well as the processes in which some of these animals participate, be identified, and, where possible, spatially depicted. This report provides data and information related to the above, and should be read in conjunction with Boshoff et al. (2001). Taxonomic order and nomenclature (scientific and common names) of mammal species referred to in this report follow Skinner & Smithers (1990) (Annex). Processes A number of processes are specific to the particular mammal species that drive these processes. For example, brown and spotted hyaenas are critical for mediating the process of scavenging. Processes involving the larger mammals, and the population size targets required to maintain certain processes, were the subject of two workshops involving scientists from CSIR-Environmentek, the Terrestrial Ecology Research Unit (TERU) and South African National Parks (SANP). A “processes” workshop was held at TERU on 11 September 2001, and a “targets” workshop was held, at the same venue, on 19 October 2001. Both workshops were preceded by the drafting of expert-compiled presentations by TERU scientists. It was agreed at the initial client-consultant, workshop, held in January 2001, that the focus of the faunal processes component would be on the medium- to large-sized mammals. Important mammal population processes have been identified according to three categories: 1. Species-driven processes Mammal-mediated processes By maintaining a population of each mammal species that potentially occurs in the planning domain, species-driven processes will inherently be captured. A number of species-driven processes were identified by an expert approach, as were the mammal species that are considered to drive each of these processes (Table 1). South African National Parks (SANP) scientists were also consulted as part of the expert approach. In general, the omnivores and herbivores mediate a larger number of processes than do the carnivores. In terms of individual species, the African elephant mediates the largest number of processes (11 out of a possible 19), followed by the bushpig, warthog and African buffalo (9 out of 19), and black rhinoceros, Cape mountain zebra, Burchell’s zebra and hippopotamus (8 out of 19). In this basic analysis, the prominent role of the megaherbivores is noteworthy, and this emphasises the need Appendix 5, page 2 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 for populations of these species to be included in ecologically viable conservation areas. In terms of individual processes, nutrient dispersal is the process that is mediated by the largest number of species (44 out of a possible 44 species), followed by seed dispersal (32 out of 44 species) and germination facilitation (31 out of 44 species). In each case, only a single species mediates the processes of geophagy and river bed biopedturbation. Predation and biopedturbation through hoof action, each with 20 out of 44 species, are also prominent species-driven processes. It is emphasised that predation can have a twofold effect on prey species, namely on their population dynamics and on their behaviour. It is not practical and feasible to depict spatially the processes listed in Table 1. These potentially occur throughout all Mammal Habitat Classes (MHCs) in the GANP planning domain. Some, e.g. herbivory, will be catered for in the vegetation analysis, on the assumption that appropriate herbivores are maintained. Some processes, e.g predation and scavenging, will occur across the GANP landscapes as a function of the presence of the predators and scavengers. This will reflect both the habitat requirements of the predators and scavengers, as well as the distribution and abundance of prey species. Thus, in order for these processes to operate, the entire suite of predators and scavengers, and their prey, is required. Biopedturbation of river beds by hippopotamus can be spatially depicted by capturing the sections of hippopotamus habitat that have been identified. Since these are focused on rivers this will presumably have been captured during the freshwater processes analysis. Bird-mediated processes In general, the extent and distribution of processes that involve birds are too poorly understood to be spatially depicted, or meaningfully included, in the conservation planning analysis in the GANP planning domain. We have, however, identified a number of processes and can only describe them to a limited extent. It must therefore be assumed, as agreed at the initial client-consultant workshop held in January 2001, that these processes will be captured by the vegetation and mammal planning components. Pollination Occurs wherever flowering plants occur, i.e. potentially throughout the planning domain. Frugivory/seed dispersal Occurs wherever there are fruiting plants, i.e. potentially throughout the planning domain (including the dunefield). Granivory Potentially occurs throughout the planning domain. Herbivory Occurs wherever suitable plant material is available, i.e. potentially throughout the planning domain. Predation Occurs wherever predatory birds and potential prey occurs, i.e. potentially throughout the planning domain (from fiscal shrikes to martial eagles) Scavenging Occurs wherever carrion becomes available – this is potentially throughout the planning domain, but cannot be predicted. Appendix 5, page 3 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 Reptile, amphibian and invertebrate-mediated processes These processes are too poorly understood to be able to depict them spatially in the conservation planning exercise in the GANP planning domain. It must therefore be assumed that, as agreed at the initial client-consultant workshop, held in January 2001, processes involving these elements of biodiversity will be captured by “umbrella” surrogates. Recommendation: The full GEF project should include a component of research into the role of the various taxa in ecologically important processes. 2. Population-driven processes This involves demographic, genetic and evolutionary processes, and each relies on minimum-sized populations of species to maintain them. It was agreed at the initial client-consultant, workshop held in January 2001, that the focus of the processes component will be on the medium- to large-sized mammals. In the case of the GANP analysis, a key assumption regarding the modelling of mammal population processes is that the mammals can move freely throughout the entire planning domain for the proposed park. All species of the medium- to large-sized mammals that potentially occur in the GANP planning domain participate in these three processes. In terms of population processes, data must be generated to enable planners to measure the effectiveness of the proposed “greater” Addo Elephant National Park in achieving predetermined demographic, genetic and evolutionary targets of mediumto large sized mammals that can potentially occur in the park, to inform decisions regarding acquisition of additional land, where necessary, to achieve these targets, and to identify species for which targets can only be met through metapopulation management. A consideration for determining minimum area requirements for preserving biological diversity is that of the estimation of minimum viable populations (MVP) for “target” species (Wilcox 1982, Soulé 1987). The MVP is a set of specifications concerning the size and structure of the populations comprising a species that is necessary to provide a margin of safety from extinction. The MVP for a species can be translated into the minimum area requirements by determining the amount and type of habitat that will satisfy the MVP. In view of this, it is necessary for realistic estimates of the spatial requirements/densities of each the selected species in the GANP planning domain to be obtained. The issue of what constitutes demographically, genetically and evolutionary viable populations is perplexing. These concepts are currently the focus of major debates in conservation biology and no clear “rules” have emerged yet. We have adopted a pragmatic approach by suggesting respective figures of 50, 200 and 2000 individuals. The value of these figures is that they represent explicit attempts to address these issues and can be modified as a better understanding develops. The figures should not be considered to be acceptable management goals for the conservation management of the global population of each species, but rather as goals for populations that could be managed as parts of metapopulations. 50 individuals: This is the population size required to achieve confidence that demographic processes are taking place. Chance demographic events leading to extinction will be reduced, but the population will be vulnerable to genetic constraints (Caughley 1994). 200 individuals: This is considered here as the smallest population required to reduce inbreeding depression and genetic drift (Lacy 1997). This total population, Appendix 5, page 4 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 approximating an effective population of 50 breeding individuals, will vary considerably between species, depending on sex ratio, mating strategies, reproductive output and other life history strategies. However, for most of the species considered here these data are not available and hence this is, again, a first approximation that can be modified as species and population specific information becomes available. 2000 individuals: This is a first approximation for an effective population size of 500 breeding individuals, at which it is hypothesised that evolutionary genetic processes will operate (Lacy 1997). This value may be too low (Lande 1995) and would vary between species as a function of both the determining of effective population size as well as the genetic dynamics (evolutionary) characteristics (e.g. mutation rate, heterozygosity) of the species in question. Adjustment of these figures will therefore have to await clarification of our understanding of these dynamics. Population size targets required to maintain population processes in the GANP planning domain. An expert approach culminated in the decision that the baseline population size target for all larger mammal species within the planning domain (i.e. including the 5 km buffer), and using the “intact” transformation category, is 50 individuals. It was also decided that a retention population size target of 200 individuals will be used for special species; these are threatened species, as listed in the South African Red Data Book for Mammals (Smithers 1986) or species for which special conservation attention is required. For all other species, the retention population size target will be zero. Species for which a population target of 2000 individuals can possibly be met by the proposed park are identified Species for which the target of 50 individuals could not be met by the proposed park, and that would have to be conserved through metapopulation management, are identified. Note that in the long-term it will be necessary to conduct metapopulation management on all the species. In the above analysis, the basis for estimating total potential population sizes of the larger mammals in the GANP planning domain is a series of Mammal Habitat Classes that in turn are based on a number of Land Classes that were delineated through vegetation mapping by experts in the field and from satellite imagery (see Boshoff et al. 2001). Estimates are provided for two park planning domain scenarios: 1) a slightly modified version of the park boundary proposed by Kerley & Boshoff (1997), and 2) the planning domain in (2) above but with a buffer of approximately 5 km in the terrestrial zone. Estimates for (1) to (2) above are provided for two transformation categories: (a) “Intact” habitat only. (b) “Restorable” habitat. (c) “Intact” and “Restorable” areas, together. The approach and methods followed in generating potential population numbers for the scenarios listed above are fully described by Boshoff et al. (2001). Appendix 5, page 5 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 The estimated potential total population sizes, for each of the planning domain and transformation scenarios, in relation to the targets mentioned above, are listed in Table 2, and summarised in Box 1. Box 1: Summary of the key outcomes in Table 2 Herbivores The baseline or retention targets are potentially achievable for 21 of the 23 herbivore species in the “Intact” habitat in the modified Kerley & Boshoff (1997) planning area. For one species, hippopotamus, the retention target of 200 animals will not be met, even by the restored full GANP planning domain (i.e. modified Kerley & Boshoff (1997) area plus a 5 km buffer). The other species, black wildebeest, is marginal within the GANP domain. Omnivores/Carnivores The baseline or retention targets are potentially achievable for only nine of 19 species in “Intact” habitat in the modified Kerley & Boshoff (1997) planning area. If the “Restorable” habitat is restored, then two of the remaining 10 species (viz. spotted hyaena and small-spotted cat) will potentially achieve the defined targets. The baseline or retention targets are potentially achievable for only 11 of 19 omnivore/carnivore species in “Intact” habitat in the modified Kerley & Boshoff (1997) planning area plus a 5 km buffer. This outcome will not change if the “Restorable” habitat is restored. For the remaining two carnivores, namely the Cape clawless otter and the spottednecked otter, potential total population sizes were estimated only for the full planning domain (i.e. including the 5km buffer). The baseline target for the Cape clawless otter can potentially be achieved in the modified Kerley & Boshoff (1997) planning area but this is unlikely to be the case for the spotted-necked otter; the 5 km buffer is required to meet the baseline target for this species. Thus, for the carnivores, the retention targets for eight (brown hyaena, cheetah, leopard, lion, serval, wild dog, honey badger, aardvark) of the 21 species are unlikely to be achieved, even by the full GANP planning domain (i.e. modified Kerley & Boshoff (1997) area plus a 5 km buffer), and metapopulation management will have to be considered for these species. The species for which potentially viable demographic, genetic and evolutionary populations could possibly be achieved, by the respective area and transformation scenarios, can be identified in Table 2. Discussion The total estimated abundances for many of the species in Table 2 are not going to drive the conservation planning process, which will in reality be driven by a few “umbrella” species. Species that do not achieve the baseline target (50 individuals) and that could have a disproportionate influence in determining irreplaceability values for planning units will have to be treated as special cases in the C-Plan analysis. Given that such species will mediate, or participate in, certain processes, it is recommended that SANP should maintain populations in the park, even if this requires an additional investment of resources. Appendix 5, page 6 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 The estimates of the potential population sizes of the carnivores could be further refined, as part of a separate study, by calculating the degree to which their food requirements can potentially be met by the herbivore populations. These calculations, however, will have to take a number of variables into account, e.g. which species occur in which habitats, seasonality, movements etc. 3. Spatially-driven processes The following processes were identified through an expert approach: Lateral migration Altitudinal migration Nomadism Dispersal The process workshop concluded that all of these processes would be satisfied by including the following: an appropriate east-west gradient north of the Zuurberg (as drought refuges); here it is recommended that two 20 000 ha areas be selected, one in the far west and one in the far east, joined by a 1 km corridor and with both areas falling within the modified Kerley & Boshoff (1997) planning domain. an appropriate upland-lowland gradient, the Zuurberg mountains, the dunefield habitat, selected N-S and E-W riverine corridors. ACKNOWLEDGEMENTS We express our grateful thanks to the following people for their contributions to our thinking and to the development of this report: Jeanne Nel, Brian van Wilgen, Sarah Davies, Inge Kotze, (CSIR- Environmentek) Mike Knight and Guy Castley (South African National Parks) Rebecca Sims-Castley (Terrestrial Ecology Research Unit, University of Port Elizabeth) REFERENCES Boshoff, A.F., Kerley, G.I.H.K, Cowling, R.M. & Wilson, S.L. 2001. Conservation planning in the Greater Addo National Park: the potential distributions and estimated spatial requirements and population sizes of the medium- to largesized mammals. Terrestrial Ecology Research Unit (University of Port Elizabeth), Report No. 33. 88 pp. Caughley, G. 1994. Directions in conservation biology. Journal of Animal Ecology 63: 215-244. Kerley, G.I.H. & Boshoff, A.F. 1997. A proposal for a Greater Addo National Park: a regional and national conservation and development opportunity. Terrestrial Ecology Research Unit (University of Port Elizabeth), Report No. 17. 62 pp. Lacy, R.C. 1997. Importance of genetic variation to the viability of mammalian populations. Journal of Mammalogy 78: 320-335. Lande, R. 1995. Mutation and conservation. Conservation Biology 9: 782-791. Skinner, J.D. & Smithers, R.H.N. 1990. The mammals of the southern African subregion, University of Pretoria, Pretoria. Smithers, R.H.N. 1986. South African Red Data Book – Terrestrial mammals. South African National Scientific Programmes Rep. No. 125. Appendix 5, page 7 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 Soulé, M. (ed.) 1987. Viable populations for conservation. Cambridge: Cambridge University Press. Wilcox, B.A. 1982. In situ conservation of genetic resources: determinants of minimum area requirements. In: J.A. McNeely & K.R. Miller (eds). National parks, conservation and development – The role of protected areas in sustaining society, pp. 639-647. Smithsonian Institution Press, Washington DC. Appendix 5, page 8 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 Table 1: Summary of processes mediated by the medium- to large-sized mammals in the GANP planning domain. (1 = process is present; blank cell = process absent or poorly developed) Germination facilitation Litter production River beds Geophagy Other processes 1 Total 7 1 1 1 1 1 1 1 1 Spotted hyaena 1 1 Cheetah 1 1 2 Leopard 1 1 1 3 Lion 1 1 1 3 Caracal 1 1 1 3 African wild cat 1 1 2 Small spotted cat 1 1 2 Porcupine 1 1 Hoof action 1 Digging 1 Dust bathing 1 Biopedturbation processes Wallowing 1 Path opening Nutrient dispersal 1 Seed dispersal Vervet monkey Scavenging 1 Predation Chacma baboon Mixed feeding Browzing Conc. grazing Bulk grazing Herbivory Grazing lawns Mammal species Habitat architecture processes Plant form Transport processes Trophic processes 1 Aardwolf Brown hyaena 1 1 Serval Bat-eared fox Wild dog 1 1 6 1 1 7 1 1 1 1 2 1 1 1 1 1 4 1 1 1 2 1 1 1 Cape fox 1 1 1 1 1 Black-backed jackal 1 1 1 1 1 7 1 1 1 6 3 1 Appendix 5, page 9 1 6 1 7 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 Cape clawless otter 1 1 2 Spotted-necked otter 1 1 2 Honey badger 1 1 Aardvark 1 1 African elephant 1 Black rhinoceros 1 Cape mountain zebra 1 Burchell’s zebra 1 Bushpig 1 Warthog Hippopotamus 1 1 1 1 1 1 1 1 7 1 1 1 1 6 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 8 1 1 1 1 1 1 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Black wildebeest 1 1 1 1 1 1 Red hartebeest 1 1 1 1 1 1 1 1 1 1 1 1 8 1 1 1 9 1 1 1 9 1 1 1 1 8 1 1 7 1 1 6 Blue duiker 1 1 1 1 1 5 Common duiker 1 1 1 1 1 5 1 1 1 1 5 1 1 1 1 6 1 1 1 1 5 Springbok 1 Klipspringer 1 Oribi 1 1 Steenbok 1 1 1 1 1 5 Grysbok 1 1 1 1 1 5 1 1 1 1 5 Grey rhebok African buffalo 1 1 1 1 1 1 9 Kudu 1 1 1 1 1 1 1 1 7 Bushbuck 1 1 1 1 1 1 1 7 1 1 1 1 1 1 7 1 1 1 1 5 1 5 Eland 1 Reedbuck 1 Mountain reedbuck TOTAL 1 4 7 10 11 20 12 1 1 32 44 1 1 1 1 10 6 9 Appendix 5, page 10 4 6 11 20 1 1 5 31 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 Table 2: Baseline (N=50) and retention (N=200) population target values, as well as estimated potential total population sizes, according to two park planning area scenarios and two transformation categories; “Intact” and “Restorable”, for the medium- to large-sized mammals. See text for assumptions and definitions. Values in columns 4-9 from Boshoff et al. (2001). Species Chacma baboon Vervet monkey Porcupine Aardwolf Brown hyaena Spotted hyaena Cheetah Leopard Lion Caracal African wild cat Small spotted cat Serval Bat-eared fox Wild dog Cape fox Black-backed jackal Cape clawless otter Spotted-necked otter Honey badger Aardvark African elephant Black rhinoceros Cape mtn zebra Special conservation status Rare (Smithers 1986) Rare (Smithers 1986) Rare (Smithers 1986) Feline aids free status Vulnerable (Smithers 1986) Rare (Smithers 1986) Rare (Smithers 1986) Endangered (Smithers 1986) Vulnerable (Smithers 1986) Vulnerable (Smithers 1986) IUCN listed Vulnerable (Smithers 1986) Vulnerable (Smithers 1986) Population target (no. animals) Estimated number of animals Modified Kerley & Boshoff (1997) Modified Kerley & Boshoff (1997) area plus a 5 area km buffer Intact Restorable Total Intact Restorable Total 50 50 50 200 200 50 50 200 200 50 200 200 200 50 200 50 50 3885 60440 15915 356 37 37 3 25 40 85 1696 130 36 3280 35 282 418 1504 28480 6328 134 15 17 3 10 19 36 720 83 18 2137 15 177 176 5388 88920 22242 490 52 55 6 36 58 121 2416 213 54 5416 50 458 594 5477 90504 22957 536 55 56 6 37 60 126 2554 205 49 5291 52 448 619 2233 46297 10250 227 24 28 4 16 30 59 1189 129 28 3472 25 282 287 118 57 7710 136801 33207 763 79 84 10 53 90 184 3743 334 78 8763 77 731 907 200 200 200 200 200 48 45 322 766 851 19 23 141 401 161 67 68 464 1167 1012 70 70 523 1250 1083 31 38 248 677 245 101 108 771 1927 1328 Appendix 5, page 11 Terrestrial Ecology Research Unit, University of Port Elizabeth Burchell’s zebra Bushpig Warthog Hippopotamus Black wildebeest Red hartebeest Blue duiker Common duiker Springbok Klipspringer Oribi Steenbok Grysbok Grey rhebok Cape buffalo Kudu Bushbuck Eland Reedbuck Mountain reedbuck Rare (Smithers 1986) Rare (Smithers 1986) Vulnerable (Smithers 1986) Disease free status Report No. 34, November 2001 50 50 50 200 50 50 200 50 50 50 200 50 50 50 200 50 50 50 50 50 996 3316 1325 27 24 874 24849 14479 1666 3574 702 7967 21964 2122 582 2023 7684 340 103 1528 805 958 820 29 8 460 7824 6843 1022 1293 510 6213 3693 88 414 1120 2965 84 128 423 Appendix 5, page 12 1801 4274 2145 55 32 1334 32673 21322 2689 4867 1213 14181 25657 2210 996 3143 10649 424 231 1951 1724 4845 2206 32 43 1369 36277 21777 2929 4836 1234 13288 28569 2393 1058 3277 11577 470 219 1980 1324 1557 1362 33 21 755 12352 11204 1815 1954 929 9958 6296 106 732 1892 5074 144 241 639 3048 6402 3569 64 64 2124 48628 32981 4744 6790 2162 23246 34865 2499 1789 5169 16652 614 460 2618 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 ANNEX Scientific and common names of the medium- to large-sized mammals that potentially occur in the GANP planning domain. Scientific name Papio cynocephalus Cercopithecus aethiops Hystrix africaeaustralis Proteles cristatus Hyaenna brunnea Crocuta crocuta Acinonyx jubatus Panthera pardus Panthera leo Felis caracal Felis lybica Felis nigripes Felis serval Otocyon megalotis Lycaon pictus Vulpes chama Canis mesomelas Aonyx capensis Lutra maculicollis Mellivora capensis Orycteropus afer Loxodonta africana Diceros bicornis Equus zebra zebra Equus burchelli Potamochoerus porcus Phacochoerus aethiopicus Hippopotamus amphibius Connochaetes gnou Alcelaphus buselaphus Philantomba monticola Sylvicapra grimmia Antidorcas marsupialis Oreotragus oreotragus Ourebia ourebi Raphicerus campestris Raphicerus melanotis Pelea capreolus Syncerus caffer Tragelaphus strepsiceros Tragelaphus scriptus Taurotragus oryx Redunca arundinum Redunca fulvorufula Common name Chacma baboon Vervet monkey Porcupine Aardwolf Brown hyaena Spotted hyaena Cheetah Leopard Lion Caracal African wild cat Small spotted cat Serval Bat-eared fox Wild dog Cape fox Black-backed jackal Cape clawless otter Spotted-necked otter Honey badger Aardvark African elephant Black rhinoceros Cape mountain zebra Burchell’s zebra/Quagga Bushpig Warthog Hippopotamus Black wildebeest Red hartebeest Blue duiker Common duiker Springbok Klipspringer Oribi Steenbok Grysbok Grey rhebok African buffalo Kudu Bushbuck Eland Reedbuck Mountain reedbuck Appendix 5, page 13 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 TERRESTRIAL ECOLOGY RESEARCH UNIT (TERU) REPORT SERIES *Contract report (confidential) Geach, B. 1995. Socio-economic and environmental aspects of land-use in the Sundays River Valley: pastoralism vs conservation/ecotourism. TERU Report 1: 57 pp. Haschick, S.L. & Kerley, G.I.H. 1995. Land-use and proposed conservation of Valley Bushveld to the north-east of the Swartkops River. TERU Report 2: 18 pp. Kerley, G.I.H. 1995. The terrestrial vertebrate fauna of Rein's Nature Reserve: inventories and management recommendations. TERU Report 3: 19 pp.* Kerley, G.I.H. 1995. The mammals of Van der Kemp's Kloof. TERU Report 4: 6 pp.* Simelane, T.S. 1996. A preliminary survey of the traditional natural resources in the Addo Elephant National Park. TERU Report 5: 12 pp. Vial, C. 1996. Levels of expectation, requirements and satisfaction of visitors viewing wildlife at Addo Elephant National Park, South Africa. TERU Report 6: 22 pp. Kerley, G.I.H & Watson, J.J. 1996. Quail as a renewable resource in the Eastern Cape. TERU Report 7: 13 pp. Boshoff, A.F. 1996. Roberts' Birds of Southern Africa : the "Millennium Edition", a synthesis of opinions on options for a seventh edition. TERU Report 8: 37 pp.* Boshoff, A.F. 1997. A survey of the birds of the farm " New Bradford" and surrounding areas, with notes on the medium to large mammal fauna. TERU Report 9: 25 pp.* Boshoff, A.F & Kerley, G.I.H. 1997. Towards a conservation policy for the Eastern Cape: the function and management of protected areas. TERU Report 10: 8 pp. Boshoff, A.F. & Kerley, G.I.H. 1997. A habitat suitability assessment for the introduction of elephant to the Sante Sana Game Reserve, Graaff-Reinet district. TERU Report 11: 15 pp.* Kerley, G.I.H. & Boshoff, A.F. 1997. A habitat suitability assessment for the introduction of black rhinoceros to the Sante Sana Game Reserve, Graaff-Reinet district. TERU Report 12: 16 pp.* Boshoff, A.F. & Kerley, G.I.H. 1997. Apieskloof Wildlife Area : Habitats, species and landuse options. TERU Report 13: 17 pp.* Kerley, G.I.H. & Boshoff, A.F. 1997. A habitat suitability assessment for the introduction of African buffalo to the Sante Sana Game Reserve, Graaff-Reinet district. TERU Report 14: 16 pp.* Kerley, G.I.H. & Boshoff, A.F. 1997. Proceedings of a strategic planning workshop for Sante Sana Game Reserve. TERU Report 15: 20 pp.* Henley, S. 1997. On the proposed reintroduction of serval (Felis serval) into the Great Fish River Reserve, Eastern Cape. TERU Report 16: 9 pp. Kerley, GIH & Boshoff, AF. 1997. A proposal for a Greater Addo National Park: a regional and national conservation and development opportunity. TERU Report 17: 62 pp. Boshoff, A.F. & Kerley, G.I.H. 1997. Comparison of alternative Eskom 400kv transmission line routes from Wolwefontein to Grassridge: potential effects on birds and mammals. TERU Report 18: 14 pp.* Boshoff, A.F. & Kerley, G.I.H. 1997. Breeding and production options for a founder herd of African buffalo in the Apieskloof Wildlife Area. TERU Report 19: 16 pp.* Boshoff, A.F. 1998. The predicted impacts of a proposed regional waste-water disposal scheme on the avifauna of the upper Blesbokspruit wetland (including the Ramsar site), Gauteng Province. TERU Report 20: 16 pp.* Boshoff, A.F., Kerley, G.I.H. & Geach, B. 1998. A biophysical survey, ecotourism development feasibility study and site assessment for Tamboekiesvlei, Mpofu District, Eastern Cape Province. TERU Report 21: 64 pp.* Boshoff, A.F. 1998. The Airports Company South Africa-Endangered Wildlife Trust strategic partnership: a project plan for a birdstrike hazard reduction programme. TERU Report 22: 48 pp.* Boshoff, A.F. 1998. The predicted ecological impact of the termination of the water supply to the Rondebult Bird Sanctuary, Germiston District, Gauteng Province. TERU Report 23: 7 pp.* Appendix 5, page 14 Terrestrial Ecology Research Unit, University of Port Elizabeth Report No. 34, November 2001 Boshoff, A.F. & Sigwela, A. 1998. The predicted impacts of the construction and operation of the proposed Coega harbour on the birds of the Coega Estuary and Jahleel Island. TERU Report 24: 11 pp.* Boshoff, A.F. & Kerley, G.I.H. (eds). 1999. Proceedings of a Greater Addo National Park Stakeholders Workshop: University of Port Elizabeth, 22-23 February 1999. TERU Report 25: 58 pp. Boshoff, A.F. & Kerley, G.I.H. 1999. Conservation planning in the Cape Floristic Region: Distribution, conservation status and spatial population requirements of the medium- to large-sized mammals. TERU Report 26: 141 pp.* Boshoff, A.F., Cowling, R.M. & Kerley, G.I.H. 2000. The Baviaanskloof Conservation Area: A conservation and tourism development priority. TERU Report 27: 35 pp. Henley, S. 2000. The Baviaanskloof Conservation Area: Opportunities for the conservation of Cape mountain zebra and leopard. TERU Report 28: 14 pp.* Cowling, R.M. & Heijnis, C.E. 2000. An assessment of the conservation value of potential World Heritage Sites in the Cape Floral Kingdom. TERU Report 29: 48 pp. Boshoff, A.F. 2000. The potential impacts of a proposed Eskom powerline, between Poseidon and Grassridge sub-stations, on the terrestrial fauna (excluding the avifauna). TERU Report 30: 31 pp.* Boshoff, A.F. 2000. The suitability of the Keurbooms River Mouth as a possible site for the construction of a small boat harbour at Plettenberg Bay. TERU Report 31: 8 pp.* Pressey, R.L. & Cowling, R.M. 2001. Systematic conservation planning for the Subtropical Thicket Ecosystem Planning (STEP) Project: a conceptual and methodological basis. TERU Report 32: 57 pp.* Boshoff, A.F., Kerley, G.I.H., Cowling, R.M. & Wilson, S.L. 2001. Conservation planning in the Greater Addo National Park: The potential distributions, and estimated spatial requirements and population sizes, of the medium- to large-sized mammals. TERU Report 33: 87 pp. Appendix 5, page 15