Urban Chronology at a Human Scale on the Coast of East Africa in the 1st Millennium a.d.

This paper presents a new high-resolution excavation sequence of a house at the 1st millennium a.d. site of Unguja Ukuu, Zanzibar, with implications for a new and detailed understanding of the period between the 7th and 9th centuries a.d. on the East African coast. This is an important period associated with a broad and distinctive cultural tradition, often seen as a pre- or proto-urban phase. Household excavations at Unguja Ukuu revealed two occupation phases, spanning less than 40 years each. The results here thus present an unprecedented temporal resolution on the site, at the scale of human experience. Excavation and microstratigraphic analyses of multiple floor layers reveal decadal change in occupation at this house. Positioning this house into the broader settlement sequence, we argue for episodic settlement at the site of Unguja Ukuu and draw out detail on how we can explore change at this generational scale

Mapping past human land use using archaeological data: A new classification for global land use synthesis and data harmonization

In the 12,000 years preceding the Industrial Revolution, human activities led to significant changes in land cover, plant and animal distributions, surface hydrology, and biochemical cycles. Earth system models suggest that this anthropogenic land cover change influenced regional and global climate. However, the representation of past land use in earth system models is currently oversimplified. As a result, there are large uncertainties in the current understanding of the past and current state of the earth system. In order to improve repre- sentation of the variety and scale of impacts that past land use had on the earth system, a global effort is underway to aggregate and synthesize archaeological and historical evi- dence of land use systems. Here we present a simple, hierarchical classification of land use systems designed to be used with archaeological and historical data at a global scale and a schema of codes that identify land use practices common to a range of systems, both imple- mented in a geospatial database. The classification scheme and database resulted from an extensive process of consultation with researchers worldwide. Our scheme is designed to deliver consistent, empirically robust data for the improvement of land use models, while simultaneously allowing for a comparative, detailed mapping of land use relevant to the needs of historical scholars. To illustrate the benefits of the classification scheme and meth- ods for mapping historical land use, we apply it to Mesopotamia and Arabia at 6 kya (c. 4000 BCE). The scheme will be used to describe land use by the Past Global Changes (PAGES) LandCover6k working group, an international project comprised of archaeologists, historians, geographers, paleoecologists, and modelers. Beyond this, the scheme has a wide utility for creating a common language between research and policy communities, link- ing archaeologists with climate modelers, biodiversity conservation workers and initiatives.publishedVersio

Mapping past human land use using archaeological data: A new classification for global land use synthesis and data harmonization.

In the 12,000 years preceding the Industrial Revolution, human activities led to significant changes in land cover, plant and animal distributions, surface hydrology, and biochemical cycles. Earth system models suggest that this anthropogenic land cover change influenced regional and global climate. However, the representation of past land use in earth system models is currently oversimplified. As a result, there are large uncertainties in the current understanding of the past and current state of the earth system. In order to improve representation of the variety and scale of impacts that past land use had on the earth system, a global effort is underway to aggregate and synthesize archaeological and historical evidence of land use systems. Here we present a simple, hierarchical classification of land use systems designed to be used with archaeological and historical data at a global scale and a schema of codes that identify land use practices common to a range of systems, both implemented in a geospatial database. The classification scheme and database resulted from an extensive process of consultation with researchers worldwide. Our scheme is designed to deliver consistent, empirically robust data for the improvement of land use models, while simultaneously allowing for a comparative, detailed mapping of land use relevant to the needs of historical scholars. To illustrate the benefits of the classification scheme and methods for mapping historical land use, we apply it to Mesopotamia and Arabia at 6 kya (c. 4000 BCE). The scheme will be used to describe land use by the Past Global Changes (PAGES) LandCover6k working group, an international project comprised of archaeologists, historians, geographers, paleoecologists, and modelers. Beyond this, the scheme has a wide utility for creating a common language between research and policy communities, linking archaeologists with climate modelers, biodiversity conservation workers and initiatives

Mapping past human land use using archaeological data: A new classification for global land use synthesis and data harmonization

In the 12,000 years preceding the Industrial Revolution, human activities led to significant changes in land cover, plant and animal distributions, surface hydrology, and biochemical cycles. Earth system models suggest that this anthropogenic land cover change influenced regional and global climate. However, the representation of past land use in earth system models is currently oversimplified. As a result, there are large uncertainties in the current understanding of the past and current state of the earth system. In order to improve representation of the variety and scale of impacts that past land use had on the earth system, a global effort is underway to aggregate and synthesize archaeological and historical evidence of land use systems. Here we present a simple, hierarchical classification of land use systems designed to be used with archaeological and historical data at a global scale and a schema of codes that identify land use practices common to a range of systems, both implemented in a geospatial database. The classification scheme and database resulted from an extensive process of consultation with researchers worldwide. Our scheme is designed to deliver consistent, empirically robust data for the improvement of land use models, while simultaneously allowing for a comparative, detailed mapping of land use relevant to the needs of historical scholars. To illustrate the benefits of the classification scheme and methods for mapping historical land use, we apply it to Mesopotamia and Arabia at 6 kya (c. 4000 BCE). The scheme will be used to describe land use by the Past Global Changes (PAGES) LandCover6k working group, an international project comprised of archaeologists, historians, geographers, paleoecologists, and modelers. Beyond this, the scheme has a wide utility for creating a common language between research and policy communities, linking archaeologists with climate modelers, biodiversity conservation workers and initiatives

What's in a hearth? Seeds and fruits from the Neolithic fishing and fowling camp at Bergschenhoek, The Netherlands, in a wider context

This paper presents new results from the Early Neolithic Dutch wetland site of Bergschenhoek (ca. 4200 cal b. c., Swifterbant Culture), which are compared with finds from similar features and sites. The data indicate the presence of predominantly eutrophic, nutrient-rich reed and forb vegetation and suggest the preparation of meals consisting of fish and fruits. The finds from the hearth, dominated by uncarbonised remains of wetland taxa, form a remarkable part of the find assemblage. Therefore, the discussion concerns assemblages, deposition processes and interpretations of uncarbonised and carbonised finds from hearths at comparable, contemporary sites. The wide variation of macroremains assemblages of hearths indicates that plant deposition in hearths is understood only partly and remains a topic for further research.Peer reviewe

Late Mesolithic and Early Neolithic human impact at Dutch wetland sites: the case study of Hardinxveld-Giessendam De Bruin

Evidence of human impact on the vegetation obtained from pollen diagrams at sites in the process of neolithisation is often difficult to detect. Apart from aspects like site function and occupation intensity, methodological aspects play a considerable role. In the Rhine-Meuse delta in the Netherlands, neolithisation is documented at the Final Mesolithic sites Hardinxveld-Giessendam Polderweg and Hardinxveld-Giessendam De Bruin and the local Early Neolithic sites of Brandwijk-Kerkhof and the Hazendonk, covering the period of 5500–2500 cal. B.C. The off-site core from Hardinxveld-Giessendam De Bruin supports earlier results that human influence on the vegetation at Hardinxveld is restricted and difficult to distinguish from natural vegetation disturbance. Human impact is more easily recognisable in the diagrams of Neolithic phases at Brandwijk-Kerkhof and the Hazendonk that show evidence of both domestic animals and cereals. Continuing Neolithisation and also research methodology, including the location of the pollen cores, may play a role in this. It is tested whether the use of a new pollen sum excluding extra-regional taxa increases the visibility of human impact

Morphometric distinction between bilobate phytoliths from Panicum miliaceum and Setaria italica leaves

The development of identification criteria for crop plants based on phytoliths is of high relevance for archaeology, palaeoecology and plant systematics. While identification criteria are available for major food crops, these are mostly based on phytoliths from inflorescences, while other plant parts remain undetected. This paper focuses on bilobate phytoliths from leaves of Panicum miliaceum L. (common millet) and Setaria italica (L.) P. Beauv. (foxtail millet), two taxa that co-occur in regions of Asia and Europe since prehistory and regularly occur at archaeological sites in Eurasia. Leaves of the investigated taxa were systematically sampled to explore the variation of short cells and to collect 27 morphometric variables of bilobate phytoliths with newly developed open-source software. The data was analysed by discriminant analysis, analysis of variance and multiple comparison tests. The resulting morphometric data from five populations per species enables a distinction between the bilobate phytoliths of P. miliaceum and S. italica. Observed differences between populations within species affect only few parameters. This possibility to classify populations of bilobate phytoliths from P. miliaceum and S. italica leaves offers a new method for the detection and identification of these taxa in archaeology, amongst others.This study was partially supported by a Marie Curie Intra European Fellowship [PHYTORES, 273610, 2011–2013].Peer reviewe

Towards improved detection and identification of crop by-products: Morphometric analysis of bilobate leaf phytoliths of "Pennisetum glaucum" and "Sorghum bicolor"

Better detection and taxonomic identification of cereal leaves is expected to result in a better understanding of the presence and function of crop products at archaeological sites. Therefore, this paper focuses on bilobate phytoliths from leaves of Pennisetum glaucum (L.) R. Br and Sorghum bicolor ssp. bicolor (L.) Moench, which are two important crop plants that regularly co-occur at archaeological sites in Africa and the Indian subcontinent. These two taxa are further compared with Panicum miliaceum L. and Setaria italica (L.) P. Beauvois, which is of relevance for agricultural sites in prehistoric South Asia, Eastern Asia, Africa, and part of Eurasia where the four crops certainly or presumably co-occur. Leaves of Pennisetum glaucum and Sorghum bicolor were systematically sampled to explore the variation of short cells and to collect 27 morphometric variables of 3100 bilobate phytoliths with newly developed open-source software. This study provides new information on the occurrence of cross-like and notched (nodular) bilobate short cells in leaves of pearl millet and trilobates in sorghum, which is of relevance for taxonomic distinction. The morphometric variables of the bilobates phytoliths do not allow for taxonomic classification between P. glaucum and S. bicolor. Possibilities for taxonomic distinction between the leaves of these taxa should thus be searched in other directions than bilobate phytolith morphometry. The obtained morphometric data are nevertheless important since they allow for future comparison with other taxa. Indeed, morphometric analysis allows for distinction between Pennisetum glaucum/Sorghum bicolor, Panicum miliaceum and Setaria italica. Furthermore, one P. glaucum population that was grown in a rather different climate than the others also shows different bilobate morphometry results. This difference between P. glaucum populations points to phytolith morphometry possibly being influenced by environmental settings. Moreover, it has implications for sampling strategies of similar research and the validity of morphometric identification criteria based on data from few reference populations or reference populations from a single region.This study was supported by a Marie Curie Intra European Fellowship [PHYTORES, 273610, 2011-2013] and the Graduate School ‘Human Development in Landscapes’, Kiel University (2013-2015), and was partly carried out at the Institute Milà y Fontanals, Spanish National Research Council, Barcelona.Peer Reviewe

Branch age and diameter: useful criteria for recognising woodland management in the present and past?

When prehistoric archaeological sites yield non-carbonised wood, one of the ways to test for management practices consisting of pollarding and coppicing is analysis of branch diameter and age. However, the interpretation of such data is often based on assumptions. To test whether it is in fact possible to identify past woodland management on the basis of age/diameter analysis in archaeological wood assemblages, this paper presents models that predict the expected age and diameter distribution of branches from unmanaged and managed trees. The models have been tested using data on modern-day Alnus glutinosa, Fraxinus excelsior and species of the genus Salix. Branches of modern-day unmanaged and managed trees with a diameter up to approx. 2 cm (not an absolute limit) have a comparable age. Branches with a diameter of approx. 2–6 cm from unmanaged trees are older than similar branches from managed trees. The age distribution in the latter also ends abruptly. The age/diameter data from the modern-day trees indicate that the models can be used to discern management in the past, if branches up to approx. 2 cm in diameter are avoided and if, critically, taxon, sample size, growing conditions, natural disturbance/opportunistic wood collection and the possibility of diameter selection are taken into account. Archaeological datasets mainly from prehistoric sites are then reinterpreted by means of comparison with the models. Indications of management in prehistory as demonstrated by age/diameter are scarce but available. There is thus a clear need for further research in this field. Practical suggestions are provided for improving the quality of future research on woodland management practices by means of branch age/diameter analysisW. Out is a member of the Complexity and Socio-Ecological dynamics research cluster (cases-bcn.net) and is funded by a EU Marie Curie Intra-European fellowship (273610)Peer reviewe