Interactions In Space For Archaeological Models

In this article we examine a variety of quantitative models for describing archaeological networks, with particular emphasis on the maritime networks of the Aegean Middle Bronze Age. In particular, we discriminate between those gravitational networks that are most likely (maximum entropy) and most efficient (best cost/benefit outcomes).Comment: 21 pages, 6 figures, 2 tables. Contribution to special issue of Advances in Complex Systems from the conference `Cultural Evolution in Spatially Structured Populations', UCL, London, September 2010. To appear in Advances in Complex System

New Light on the Silent Millennia: Mediterranean Africa, ca. 4000–900 BC

AbstractThe so-called neolithization process (ca. 6000/5500–4000 BC) in Mediterranean Africa and the Sahara has been increasingly researched in recent years. In contrast, relatively little is known, especially in Mediterranean Africa, of the period between the beginnings of irreversible climatic deterioration in the Sahara, around 4000–3500 BC, and the onset of Iron Age to broadly Classical times. Why, with the exception of the Nile Delta, is our knowledge of the period between the fourth millennium BC and the threshold of the first Iron Age Phoenician and Greek colonies so limited? To what extent can this information gap be attributed to aridification in the Mediterranean zone, or is it rather a product of the failure to look for the right kinds of materials and sites, and of their relative visibility? In order to answer these questions, this paper focuses specifically on Mediterranean Africa (with the exception of Egypt) from about 4000 BC to ca. 900 BC. It is mainly based on the data made available on MedAfriCarbon, a spatially linked, publicly accessible database and web app comprising the 14C chronometric evidence from Mediterranean Africa from 12,000 to 600 cal. BC, with details of associated cultural and economic information. Analysis of these data shows that most of Mediterranean Africa beyond the Nile was occupied to different extents throughout the 3000-year period covered in this article and that, with a few important exceptions, the robust and resilient nature of local, mainly pastoral, ways of life militated against a shift towards a fully agricultural economy.</jats:p

Human demography changes in Morocco and environmental imprint during the Holocene

The aim of this work is to reconstruct the periods of growth and decline of human populations in Morocco and their potential impacts on the landscape over the past 10,000 years. In order to estimate the trends in the human population size between 10,000 and 3000 years ago, we used a summed probability distribution (SPD) of radiocarbon dates from a wide range of archaeological sites throughout Morocco. Landscape changes were identified and quantified from a dataset of fossil pollen records. Different anthropogenic pollen markers, as well as natural vegetation groups and taxonomic richness were used to analyse the relationship between long-term trends in human population expansion or regression and type of impact on the landscape. The sub-regions of Morocco have different topographies and climates, which have either favoured or prevented the establishment and/or spread of human populations. In order to identify the areas most significantly impacted by humans and the timing of such impacts, we have reconstructed and compared the same past anthropogenic and landscape proxies along with the population trends within the lowlands and mountainous areas. The lowlands were more strongly impacted earlier in the Holocene than the mountainous areas. Anthropogenic markers indicate that farming expanded in the lowlands during the first major expansion of human populations between ca. 7200 and 6700 cal. yr BP at the start of the Neolithic period. In the Atlas and Rif Mountains, anthropogenic impact is not clearly detectable in any of these areas before 4000 cal. BP. </jats:p

The MedAfriCarbon Radiocarbon Database and Web Application. Archaeological Dynamics in Mediterranean Africa, ca. 9600–700 BC

The MedAfriCarbon radiocarbon database and its accompanying web application are outcomes of the MedAfrica project — Archaeological deep history and dynamics of Mediterranean Africa, ca. 9600–700 BC. The dataset presented here in Version 1.0 of the database includes 1587 archaeological 14C dates from 368 sites in Mediterranean Africa. The database is unusual because the majority of the dates within it have been annotated with further cultural and environmental variables, notably the presence/absence of different domestic/wild species and particular material culture traits. MedAfriCarbon also includes a publicly-accessible web application that facilitates data exploration and informal analysis

Global patterns in island colonization during the Holocene

Analysis of the spatial and temporal structure of global island colonization allows us to frame the extent of insular human cultural diversity, model the impact of common environmental factors cross-culturally, and understand the contribution of island maritime societies to big historical processes. No such analysis has, however, been undertaken since the 1980s. In this paper we review and update global patterns in island colonization, synthesizing data from all the major island groups and theaters and undertaking quantitative and qualitative analysis of these data. We demonstrate the continued relevance of certain biogeographic and environmental factors in structuring how humans colonized islands during the Holocene. Our analysis also suggests the importance of other factors, some previously anticipated—such as culturally ingrained seafaring traditions and technological enhancement of dispersal capacity—but some not, such as the relationship between demographic growth and connectivity, differing trophic limitations impinging on colonizing farmers versus hunter-gatherer-foragers, and the constraining effects of latitude. We also connect colonization with continental dynamics: both the horizontal transmission of farming lifestyles earlier in the Holocene, and subsequent centrifugal processes associated with early state formation later in the Holocene.Bioarchaeolog

Mediterranean landscape change during the Holocene: synthesis, comparison and regional trends in population, land cover and climate

This synthesis paper offers a comparative perspective on how seven different Mediterranean regions, from Iberia and Morocco to the Levant, have been transformed by human and natural agencies during the last ten millennia. It draws on a range of sources of data notably, 1) archaeological site surveys (n=32k) and 14C dates (n=12k) as proxies for long-term population change, 2) pollen records as a proxy for past vegetation and land cover (n=157), and 3) proxies, such as stable isotopes, from lake, cave and marine records as indicators of hydro-climate (n=47). Where possible, these data sets have been made spatially and temporally congruent in order to examine relationships between them statistically and graphically. Data have been aggregated or averaged for each region/subregion and put into 200-year time windows. Archaeo-demographic data show a clear increase at the start of Neolithic farming, followed by a series of regionally-asynchronous fluctuations in population, prior to a pan-Mediterranean Roman settlement maximum. Pollen data indicate a Late Holocene decline in %Arboreal Pollen in those regions that were initially well-wooded, but not in drier regions of the southern/eastern Mediterranean. Overall, the clearest palynological proxy for human land cover change is provided by the OJCV (tree crop) index. The cultivation of these trees in the eastern Mediterranean after 6500 Cal yr BP may have been an adaptive response to mid-Holocene climatic desiccation. These anthropogenic pollen indicators correlate more closely with trends in population than with regional hydro-climatic z-scores, implying that they reflect primarily human activities. During the mid-Holocene, most Mediterranean landscapes were transformed by a combination of climate and rural land use, but after ~3500 Cal yr BP, human actions became increasingly dominant in determining land cover. During the last 1500 years the dominant landscape trajectory in the eastern Mediterranean was markedly different to that in the central/western Mediterranean

The changing face of the Mediterranean: land cover, demography, and environmental change

This paper introduces a special issue on The Changing Face of the Mediterranean: Land Cover, Demography, and Environmental Change, which brings together up-to-date regional or thematic perspectives on major long-term trends in Mediterranean human–environment relations. Particularly, important insights are provided by palynology to reconstruct past vegetation and land cover, and archaeology to establish long-term demographic trends, but with further significant input from palaeoclimatology, palaeofire research and geomorphology. Here, we introduce the rationale behind this pan-Mediterranean research initiative, outline its major sources of evidence and method, and describe how individual submissions work to complement one another

Phylogeography of a Land Snail Suggests Trans-Mediterranean Neolithic Transport

Background: Fragmented distribution ranges of species with little active dispersal capacity raise the question about their place of origin and the processes and timing of either range fragmentation or dispersal. The peculiar distribution of the land snail Tudorella sulcata s. str. in Southern France, Sardinia and Algeria is such a challenging case. Methodology: Statistical phylogeographic analyses with mitochondrial COI and nuclear hsp70 haplotypes were used to answer the questions of the species' origin, sequence and timing of dispersal. The origin of the species was on Sardinia. Starting from there, a first expansion to Algeria and then to France took place. Abiotic and zoochorous dispersal could be excluded by considering the species' life style, leaving only anthropogenic translocation as parsimonious explanation. The geographic expansion could be dated to approximately 8,000 years before present with a 95% confidence interval of 10,000 to 3,000 years before present. Conclusions: This period coincides with the Neolithic expansion in the Western Mediterranean, suggesting a role of these settlers as vectors. Our findings thus propose that non-domesticated animals and plants may give hints on the direction and timing of early human expansion routes

Excavations at Azoria, 2003–2004, Part 2: The Final Neolithic, Late Prepalatial, and Early Iron Age Occupation

This article constitutes the second of two reports on fieldwork conducted at Azoria in eastern Crete during the 2003 and 2004 excavation seasons. Evidence of Final Neolithic and Early Iron Age occupation and traces of Late Prepalatial activity were found underlying the Archaic civic buildings on the South Acropolis, particularly along the southwest terrace. The recovery of substantial Final Neolithic architectural and habitation remains contributes to our understanding of the 4th millennium in eastern Crete. Stratigraphic excavations have also clarified the spatial extent of the settlement from Late Minoan IIIC to the Late Geometric period, and brought to light evidence for the transition from the Early Iron Age to the Archaic period, and the transformation of the site in the 7th century B.C