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Until recently the Nigerian Nok Culture had primarily been known for its terracotta sculptures and the existence of iron metallurgy, providing some of the earliest evidence for artistic sculpting and iron working in sub-Saharan Africa. Research was resumed in 2005 to understand the Nok Culture phenomenon, employing a holistic approach in which the sculptures and iron metallurgy remain central, but which likewise covers other archaeological aspects including chronology, settlement patterns, economy, and the environment as key research themes. In the beginning of this endeavour the development of social complexity during the duration of the Nok Culture constituted a focal point. However, after nearly ten years of research and an abundance of new data the initial hypothesis can no longer be maintained. Rather than attributes of social complexity like signs of inequality, hierarchy, nucleation of settlement systems, communal and public monuments, or alternative African versions of complexity discussed in recent years, it has become apparent that the Nok Culture, no matter which concept is followed, developed complexity only in terms of ritual. Relevant information and arguments for the transition of the theoretical background are provided here.
Non-Timber Forest Products (NTFPs) make a major contribution to the livelihoods and diets of rural households in the savanna ecosystems of West Africa. However, land use change and climatic variability might affect their availability in the future. Based on a survey among 227 households in Northern Benin, we investigated local substitution patterns for the seeds of the three socio-economically most important NTFP-species in the region, Vitellaria paradoxa, Adansonia digitata and Parkia biglobosa, being major sources for protein, fat, and micronutrients in local daily diets. Our study compared substitution patterns between, firstly, three income groups, to assess whether a households’ socio-economic status has an influence on the choice of surrogates (low cost vs. more costly options). Secondly, we compared substitution patterns between the five major ethnic groups in the study region (the Fulani, the Bariba, the Ditammarie, the Kabiyé and the Yom). The choice of substitutes differed significantly across income groups. However, the poorest households clearly show to be the most vulnerable: up to 30 % of the sampled households stated they would lack an adequate replacement for the NTFPs in question. Furthermore, ethnic affiliation showed to have a considerable impact on the preferred alternative products due to underlying cultural traditions of plant use. Subsequently, aiming at maintaining – and enhancing – the local supply of V. paradoxa, P. biglobosa and A. digitata in order to secure their contributions to local diets, local land use policy should have a particular focus on their ethnic-conditioned use and particularly the specific requirements of the poorest community members.
Particularly in savannas, termites are ecosystem engineers and a keystone group in ecology. For the understanding of the savanna vegetation, mound building termites are of particular interest. Due to their special soil chemistry and physical structure, termite mounds often host other plants than the surrounding savanna. As our knowledge of the specific contribution of mound-building termites to overall savanna diversity and ecosystem dynamics doubtlessly is not complete, this paper summarises the state of the art in order to stimulate further research. According to the research interest of the authors, focus is laid on the West African savanna and on the genus Macrotermes.