Three-Dimensional Puzzles: Southern African and Upper Palaeolithic Rock Art

The history of anthropology is a growing field of study within the discipline itself. Our series 'Key Informants on the History of Anthropology' contributes to the discussion of how anthropology, as it is understood and practised today, evolved and took shape. In the following invited contribution, David Lewis-Williams reflects on the major reinterpretation of southern African rock art and Upper Palaeolithic art that took place in the 1970s and 1980s. An earlier interpretation of the rock art as representing hunters' impressions of their prey was replaced by sophisticated interpretations of the cosmology of the first inhabitants of South Africa. Lewis-Williams's work was crucial in bringing about this shift. David Lewis-Williams is Professor Emeritus of Archaeology and founder of the Rock Art Research Institute of the University of the Witwatersrand, South Africa, which promotes studies of the more than 15,000 sites within the country.     

Nouvelles découvertes d'art rupestre au Mato Grosso (Cidade de Pedra, Rondonópolis, Brésil)

Since 1983, Professor Agueda Vilhena-Vialou is conducting in Mato Grosso (Brazil) the French-brasilian archeological mission Fossil men and their paleo-environments in the Paraná basin. Its goal is the study of the first prehistoric settlements of Latin America's heart, in their economic, social, cultural and symbolic dimensions. Thanks to the complementary and comparative analysis of the habitats, the regional settlements and the rock art, our research targets a more precise definition of territories and cultures proper of the prehistoric human groups from the South of the actual Mato Grosso state. The study of rock art, the most revealing aspect of symbolic behaviours, is one of the strongest programs inside our multidisciplinary team. Today, thanks to systematic prospections led along the Rio Vermelho (between Pantanal swamp at West and Rondonópolis city at East), a hundred rock art sites (walls, shelters and caves), decorated with signs, animals and humans, have been discovered, and, for the most of them, studied. These figures are painted, engraved and more rarely sculpted. Along those pages, the author is presenting the preliminary analysis of ten new rock art sites, recently identified in a cliff on the right bank of the Vermelho River. He starts a comparative study with the sites of the Cidade de Pedra and of close micro basin, from the left bank of the River. This research is showing the symbolic identities, both common and specific, proper to different territories of this major rock art region of Brazil, which is divided in several areas and micro territories, shared but autonomous.     

Animal disease and the limits of local knowledge: dealing with ticks and tick‐borne diseases in South Africa

Some proponents of local knowledge, such as Paul Sillitoe, have expressed second thoughts about its capacity to effect development on the ‘revolutionary’ scale once predicted. Our argument in this article follows a similar route. Recent research into the management of livestock in South Africa makes clear that rural African livestock farmers experience uncertainty in relation to the control of stock diseases. State provision of veterinary services has been significantly reduced over the past decade. Both white and African livestock owners are to a greater extent left to their own devices. In some areas of animal disease management, African livestock owners have recourse to tried‐and‐tested local remedies, which are largely plant‐based. But especially in the critical sphere of tick control, efficacious treatments are less evident, and livestock owners struggle to find adequate solutions to high tickloads. This is particularly important in South Africa in the early twenty‐first century because land reform and the freedom to purchase land in the post‐apartheid context afford African stockowners opportunities to expand livestock holdings. Our research suggests that the limits of local knowledge in dealing with ticks is one of the central problems faced by African livestock owners. We judge this in relation not only to efficacy but also to the perceptions of livestock owners themselves. While confidence and practice vary, and there is increasing resort to chemical acaricides, we were struck by the uncertainty of livestock owners over the best strategies.     

L’apport de l’ethnographie au concept de « chasse magique par empathie » (ou compatissante) et de chamanisme dans l’art préhistorique d’Afrique australe

African rituals and beliefs have been recorded by various observers (travelers and anthropologists) in different areas in southern Africa within the last two centuries, and these are useful for interpreting prehistoric rock art (paintings and engravings). Notably, Lichtenstein (1812) recorded rituals among Nguni (who interacted with San) in South Africa, where a hunter took on the form of an animal which was symbolically wounded and which was symbolically killed in the belief that this would contribute to success in a forthcoming hunt. In Namibia, Lebzelter (1934) recorded another ritual in which a San hunter symbolically wounded and symbolically killed an animal represented in a drawing. Such rituals relate to the principle of sympathetic hunting magic. The ethnological evidence is discussed in relation to prehistoric rock art in different areas of southern Africa (Wonderwerk Cave in South Africa, Apollo 11 Cave in Namibia, and Melikane Shelter in Lesotho), and in relation to an important photograph of a ritual presumed to be associated with hunting, recorded at Logageng in the southern Kalahari, South Africa. When taken together with linguistic as well as ethnographic evidence, these sources of information support the view that the so-called trance hypothesis (relating to shamanism) and the principle of sympathetic hunting magic are not mutually exclusive, at least in southern Africa (if not elsewhere).     

Climatic and cultural changes in the west Congo Basin forests over the past 5000 years

Central Africa includes the world''s second largest rainforest block. The ecology of the region remains poorly understood, as does its vegetation and archaeological history. However, over the past 20 years, multidisciplinary scientific programmes have enhanced knowledge of old human presence and palaeoenvironments in the forestry block of Central Africa. This first regional synthesis documents significant cultural changes over the past five millennia and describes how they are linked to climate. It is now well documented that climatic conditions in the African tropics underwent significant changes throughout this period and here we demonstrate that corresponding shifts in human demography have had a strong influence on the forests. The most influential event was the decline of the strong African monsoon in the Late Holocene, resulting in serious disturbance of the forest block around 3500 BP. During the same period, populations from the north settled in the forest zone; they mastered new technologies such as pottery and fabrication of polished stone tools, and seem to have practised agriculture. The opening up of forests from 2500 BP favoured the arrival of metallurgist populations that impacted the forest. During this long period (2500–1400 BP), a remarkable increase of archaeological sites is an indication of a demographic explosion of metallurgist populations. Paradoxically, we have found evidence of pearl millet (Pennisetum glaucum) cultivation in the forest around 2200 BP, implying a more arid context. While Early Iron Age sites (prior to 1400 BP) and recent pre-colonial sites (two to eight centuries BP) are abundant, the period between 1600 and 1000 BP is characterized by a sharp decrease in human settlements, with a population crash between 1300 and 1000 BP over a large part of Central Africa. It is only in the eleventh century that new populations of metallurgists settled into the forest block. In this paper, we analyse the spatial and temporal distribution of 328 archaeological sites that have been reliably radiocarbon dated. The results allow us to piece together changes in the relationships between human populations and the environments in which they lived. On this basis, we discuss interactions between humans, climate and vegetation during the past five millennia and the implications of the absence of people from the landscape over three centuries. We go on to discuss modern vegetation patterns and African forest conservation in the light of these events.     

The epidemiology of yellow fever in Africa

Yellow fever (YF) is still a major public heath problem, particularly in Africa, despite the availability of a very efficacious vaccine. The World Health Organization estimates that there are 200,000 cases of YF annually, including 30,000 deaths, of which over 90% occur in Africa. In the past 15 years, the number of YF cases has increased tremendously, with most of the YF activity in West Africa. This increase in YF activity is in part due to a breakdown in YF vaccination and mosquito control programs. Five genotypes of YF virus have been found in Africa, and each genotype circulates in a distinct geographical region. West Africa genotype I, found in Nigeria and surrounding areas, is associated with frequent epidemics, whereas the three genotypes in East and Central Africa are in regions where YF outbreaks are rare. Other factors, including genetic and behavioral variation among vector species, are also thought to play a role in the epidemiology of YF in Africa.     

Honeybush (Cyclopia spp.): From local cottage industry to global markets — The catalytic and supporting role of research

Honeybush tea (Cyclopia spp.), one of the traditional South African herbal teas with a long history of regional use, remained a cottage industry until the mid-1990s when researchers were instrumental in the development of a formal agricultural and agro-processing industry. It is one of the few indigenous South African plants that made the transition from the wild to a commercial product during the past 100 years. Research activities during the past 20 years included propagation, production, genetic improvement, processing, composition and the potential for value-adding. The present review provides an up-to-date and comprehensive record of the development of the South African honeybush industry, against the background of the historical highlights in the making of an industry. It provides a blueprint of the processes and actions involved in the development of a new agricultural and agro-processing industry from an herbal plant. Insight into challenges faced by the industry and future research needed to keep it competitive are provided.     

The forests and woodlands of Labrador, Canada: ecology, distribution and future management

Labrador, Canada is the last relatively undeveloped landmass of Boreal and subarctic Canada. Its land area is over 288,000 km², with less than 1% developed, and a human population of below 30,000. Labrador is greater than 60% forest- and woodland-covered and over 30% tundra, soil and rock barrens. We review the ecology and distribution of forests, woodlands, and related vegetation of Labrador within the context of climate, forest site index, landform, soils, and disturbance. Recent ecosystem management through a public planning process with emphasis on past and future comanagement and development with traditional and western scientific principles is currently underway. Plant–animal interactions, traditional uses by aboriginal groups, and early history are also reviewed.     

Amateur Certification in Archaeology:

Abstract

Amateur and professional archeologists alike have called again and again for more public education, particularly as destruction of archeological sites has accelerated. Several programs focusing on education through certification programs are reviewed. Problems of amateur participation, relevance to the community and university, and publication are discussed. It is concluded that a well-planned program of amateur education and certification can be an effective tool in the creation of a public ethic of conservation. Through such a program, archeology can benefit amateurs and professionals, museums and schools, communities and individuals. In short, it offers the possibility of a true “public archeology.”     

Carnivora from the Plio-Pleistocene hominin site of Drimolen, Gauteng, South Africa

Drimolen is one of the newest and most productive hominin sites in South Africa, and is dated on faunal grounds between 2.0 Ma to 1.5 Ma. This paper provides the first overview of the Carnivora from Drimolen, updating the previously published preliminary faunal list, and describing all currently prepared craniodental and postcranial material. The Drimolen specimens are described in comparison with other modern and fossil South African carnivore material. The carnivores cover a range of taxa including hyaenids, felids, canids and herpestids. Most notable amongst these are the sabretooth Dinofelis aff. piveteaui craniodental and postcranial remains, which are described in detail, and a Chasmaporthetes nitidula cranium. The genus Chasmaporthetes is found at three other sites in the area - Sterkfontein, Swartkrans and Coopers D. There are two models for the geographic origin of Dinofelis piveteaui, in that it may have arisen in either eastern or southern Africa. These possibilities are discussed in the light of the new South African Dinofelis material, as the Drimolen material appears to represent a more primitive form with affinities with D. piveteaui. Fossil leopard material from Kromdraai B and Drimolen is also discussed, as the metapodia assigned to P. pardus from these two sites are very small, but lie within the variation of modern leopards. Such size differences in fossil postcrania may have implications for the niches that these animals may have occupied in the past.     

Does Poor Quality Schooling and/or Teacher Quality Hurt Black South African Students Enrolling for a Degree at the University of KwaZulu-Natal?

AbstractWealthy schools appoint better qualified teachers, less wealthy schools under qualified teachers. Added to this mix is a powerful teacher’s union whose policies attempt to entrench the job security of teachers in the less wealthy schools irrespective of whether they can teach their subjects or not. Can one isolate these effects from that of other socio-demographic factors that may also be affecting the performance of students when they enrol for a degree at the University of KwaZulu-Natal (UKZN)? An outcome variable that subtracts the number of courses that have been failed from the number of courses that have been passed, dividing this by the total number of years that they have spent studying for a particular degree will be used as a response variable for this paper.ObjectivesThe system of secondary education in South Africa is highly polarized. On the one hand, we have a group of mainly Black African students, forming about 80% of the total student population, that come from a vastly under-resourced rural or township based community. On the other hand, we have a group of predominantly White and Indian students who are able to attend a far better resourced set of private schools. Added to this mix, we have 240,000 of South Africa’s total number of 390,000 primary and secondary school teachers who belong to a powerful teacher’s union which enjoys a strong political alliance with the ruling party in South Africa. With most of their union members teaching in the less wealthy schools in South Africa, `school background’ now includes a politically motivated component that focuses on teacher self–interest rather than the education of the child. What sort of effect does school background have on the performance of students when they enter an institution of higher learning? More importantly, can one isolate the effect of school background from that of other possibly confounding factors such as gender, financial aid and the receipt of some form of residence based accommodation that will also impact on their performance while at university?MethodA total of 6,183 students enrolling for a degree at the University of KwaZulu-Natal (UKZN) over the period 2008 to 2012 were used a dataset for this study. Permission to use this dataset was given by the Teaching and Learning Office at UKZN. The database that was used for this study was obtained from the Division of Management Information (DMI) office at UKZN. The percentage based marks that students have managed to record for Mathematics, English, Biology and Accounting in their school leaving exams together with some other important but observable socio-economic factors were included in a regression model to determine how students will perform at UKZN. Socio-economic variables relating to gender, race and whether they have receivd some form of financial aid or residence based accommodation while studying at university were also included as predictor variables in our regression based model structure.

Results and Conclusions

An interaction effect associated with being a Black African student who has been privileged enough to attend a quintile five school was found to be significant. A main effect associated with being able to attend a more privileged quintile 5 school however was found to be nonsignificant even after an adjustment has been made for gender, race, the receipt of some form of financial aid and residence based accommodation. Given that UKZN already has a number of bridging programs in place that target students who have come from a less privileged background, for university based policymakers, this result may help to justify the targeted selection of Black African students from the less privileged schools that is taking place. Because some of the disparity in matric performance that we are observing may also be associated with teacher competency and the protective influence of a powerful teacher’s union, this paper may also help to highlight some of the economic costs related with having under-prepared students. “A mind is a terrible thing to waste”–United Negro College Fund.     

Plant genomics in Africa: present and prospects

Plants are the world’s most consumed goods. They are of high economic value and bring many health benefits. In most countries in Africa, the supply and quality of food will rise to meet the growing population’s increasing demand. Genomics and other biotechnology tools offer the opportunity to improve subsistence crops and medicinal herbs in the continent. Significant advances have been made in plant genomics, which have enhanced our knowledge of the molecular processes underlying both plant quality and yield. The sequencing of complex genomes of African plant species, facilitated by the continuously evolving next-generation sequencing technologies and advanced bioinformatics approaches, has provided new opportunities for crop improvement. This review summarizes the achievements of genome sequencing projects of endemic African plants in the last two decades. We also present perspectives and challenges for future plant genomic studies that will accelerate important plant breeding programs for African communities. These challenges include a lack of basic facilities, a lack of sequencing and bioinformatics facilities, and a lack of skills to design genomics studies. However, it is imperative to state that African countries have become key players in the plant genome revolution and genome derived-biotechnology. Therefore, African governments should invest in public plant genomics research and applications, establish bioinformatics platforms and training programs, and stimulate university and industry partnerships to fully deploy plant genomics, particularly in the fields of agriculture and medicine.     

Replacement of previously circulating respiratory syncytial virus subtype B strains with the BA genotype in South Africa

Respiratory syncytial virus (RSV) is a major cause of bronchiolitis and pneumonia in infants, the immunocompromised, and the elderly in both developed and developing countries. Reinfections are common, and G protein variability is one mechanism to overcome herd immunity. This is illustrated by the appearance of the BA genotype with a 60-nucleotide duplication dominating the subtype B genotypes in epidemics worldwide. To investigate the evolution of subtype B in South Africa since 2002, the genetic variability of the G protein was analyzed in all recent strains isolated over 4 years (2006 to 2009) in South African hospitals. Bayesian analysis revealed a replacement of all subtype B genotypes previously identified in South Africa with the BA genotype since 2006, while subtype A genotypes identified in previous years are still circulating. Compared to BA strains from other countries, the evolutionary rate of the South African BA genotype was shown to be 2.305 × 10(-3) nucleotide substitutions/site/year and drift was evident. The most recent common ancestor (MRCA) of the South African BA viruses was determined to date back to 1996. All South African BA isolates clustered with the BA-IV subgenotype, and the appearance of new subgenotypes within this branch may occur if drift continues. Sequencing of the complete G protein of selected South African strains revealed an additional 6-nucleotide deletion. Acquisition of the 60-nucleotide duplication appeared to have improved the fitness of this virus, and more recent subtype B strains may need to be included in experimental vaccines to evaluate their efficacy in the current setting of evolved circulating strains.     

Plant community response to loss of large herbivores: comparing consequences in a South African and a North American grassland

Loss of biodiversity poses one of the greatest threats to natural ecosystems throughout the world. However, a comprehensive understanding of the impacts of species losses from upper trophic levels is still emerging. Here we compare the impacts of large mammalian herbivore species loss on grassland plant community structure and composition in a South African and North American grassland. Herbaceous plant communities were surveyed at sites without large mammalian herbivores present and at sites with a single species of herbivore present in both locations, and additionally at one site in South Africa with multiple herbivore species. At both the North American and South African locations, plant communities on sites with a single herbivore species were more diverse and species rich than on sites with no herbivores. At the multi-herbivore site in South Africa, plant diversity and richness were comparable to that of the single herbivore site early in the growing season and to the no herbivore site late in the growing season. Analyses of plant community composition, however, indicated strong differences between the multi-herbivore site and the single and no herbivore sites, which were more similar to each other. In moderate to high-productivity ecosystems with one or a few species of large herbivores, loss of herbivores can cause a significant decrease in plant diversity and richness, and can have pronounced impacts on grassland plant community composition. In ecosystems with higher herbivore richness, species loss may also significantly alter plant community structure and composition, although standard metrics of community structure may obscure these differences.     

Convergence and contingency in production–precipitation relationships in North American and South African C4 grasslands

Mesic grasslands in North America and South Africa share many structural attributes, but less is known of their functional similarities. We assessed the control of a key ecosystem process, aboveground net primary production (ANPP), by interannual variation in precipitation amount and pattern via analysis of data sets (15- and 24-year periods) from long-term research programs on each continent. Both sites were dominated by C₄ grasses and had similar growing season climates; thus, we expected convergence in precipitation–ANPP relationships. Lack of convergence, however, would support an alternative hypothesis—that differences in evolutionary history and purportedly greater climatic variability in South Africa fundamentally alter the functioning of southern versus northern hemisphere grasslands. Neither mean annual precipitation nor mean ANPP differed between the South African and North American sites (838 vs. 857 mm/year, 423.5 vs. 461.4 g/m² respectively) and growing season precipitation–ANPP relationships were similar. Despite overall convergence, there were differences between sites in how the seasonal timing of precipitation affected ANPP. In particular, interannual variability in precipitation that fell during the first half of the growing season strongly affected annual ANPP in South Africa (P < 0.01), but was not related to ANPP in North America (P = 0.098). Both sites were affected similarly by late season precipitation. Divergence in the seasonal course of available soil moisture (chronically low in the winter and early spring in the South African site vs. high in the North American site) is proposed as a key contingent factor explaining differential sensitivity in ANPP to early season precipitation in these two grasslands. These long-term data sets provided no support for greater rainfall, temperature or ANPP variability in the South African versus the North American site. However, greater sensitivity of ANPP to early season precipitation in the South African grassland suggests that future patterns of productivity may be more responsive to seasonal changes in climate compared with the North American site.     

Racial/Ethnic Differences in Effects of Welfare Policies on Early School Readiness and Later Achievement

This study examined whether the effects of employment-based policies on children's math and reading achievement differed for African American, Latino and Caucasian children of welfare receiving parents, and if so, why. Two kinds of employment policies were examined: education-first programs with an emphasis on adult education and job training; and work-first programs with an emphasis on immediate employment. With data from two- and five-year follow-ups in four experimental demonstrations in Grand Rapids, Michigan (N = 591) and Riverside County, California (N = 629), there was evidence of small positive effects of the Grand Rapids and Riverside education-first programs on African American and Latino children's school readiness and math scores. An opposite pattern of effects emerged among Caucasian children. In one of the two sites, we found that Latino parents' higher levels of goals for pursuing their own education appeared to explain why their children benefited to a greater degree from the program than their Caucasian counterparts.     

Life-history styles of fishes in South African estuaries

Synopsis Fish utilizing South African estuaries may be divided into two major groups according to the location of their spawning sites. The marine group comprises large species which spawn at sea, enter estuaries mainly as juveniles, and return to the sea prior to attaining sexual maturity. The estuarine group is dominated by small species which have the ability to complete their life cycle within the estuarine environment. They tend to produce relatively few, demersal eggs, or exhibit parental care, which facilitates the retention of eggs and young within the estuary, whereas the marine group release large numbers of small pelagic eggs during spawning and exhibit no parental care. This is contrary to the theory that estuaries (unpredictable environments) should favour altricial life-history styles and the marine inshore zone (a more predictable environment) should favour precocial styles. However, if the total ichthyofauna of South African estuaries is considered, then altricial species predominate. The fact that both altricial and precocial traits are well represented within the overall estuarine fish community suggests that the various taxa have adapted their life-history styles, in different ways, to ensure the utilization of abundant food resources available within these fluctuating systems. A detailed comparison of the life-history styles of the estuarine teleostGilchristella aestuaria and the marine fishMugil cephalus is used to illustrate the contrasting manner in which these two species have succeeded in exploiting South African estuaries.     

Complementary representation and zones of ecological transition

Minimum complementary sets of sites that represent each species at least once have been argued to provide a nominal core reserve network and the starting point for regional conservation programs. However, this approach may be inadequate if there is a tendency to represent several species at marginal areas within their ranges, which may occur if high efficiency results from preferential selection of sites in areas of ecological transition. Here we use data on the distributions of birds in South Africa and Lesotho to explore this idea. We found that for five measures that are expected to reflect the location of areas of ecological transition, complementary sets tend to select higher values of these measures than expected by chance. We recommend that methods for the identification of priority areas for conservation that incorporate viability concerns be preferred to minimum representation sets, even if this results in more costly reserve networks.     

Recombination gives a new insight in the effective population size and the history of the old world human populations

The information left by recombination in our genomes can be used to make inferences on our recent evolutionary history. Specifically, the number of past recombination events in a population sample is a function of its effective population size (Ne). We have applied a method, Identifying Recombination in Sequences (IRiS), to detect specific past recombination events in 30 Old World populations to infer their Ne. We have found that sub-Saharan African populations have an Ne that is approximately four times greater than those of non-African populations and that outside of Africa, South Asian populations had the largest Ne. We also observe that the patterns of recombinational diversity of these populations correlate with distance out of Africa if that distance is measured along a path crossing South Arabia. No such correlation is found through a Sinai route, suggesting that anatomically modern humans first left Africa through the Bab-el-Mandeb strait rather than through present Egypt.