Michelle Farrell

Later prehistoric vegetation dynamics and Bronze Age agriculture at Hobbister, Orkney, Scotland

The Bronze Age in Britain was a time of major social and cultural changes, reflected in the division of the landscape into field systems and the establishment of new belief systems and ritual practices. Several hypotheses have been advanced to explain these changes, and assessment of many of them is dependent on the availability of detailed palaeoenvironmental data from the sites concerned. This paper explores the development of a later prehistoric landscape in Orkney, where a Bronze Age field system and an apparently ritually-deposited late Bronze Age axe head are located in an area of deep blanket peat from which high-resolution palaeoenvironmental sequences have been recovered. There is no indication that the field system was constructed to facilitate agricultural intensification, and it more likely reflects a cultural response to social fragmentation associated with a more dispersed settlement pattern. There is evidence for wetter conditions during the later Bronze Age, and the apparent votive deposit may reflect the efforts of the local population to maintain community integrity during a time of perceptible environmental change leading to loss of farmland. The study emphasises the advantages of close integration of palaeoenvironmental and archaeological data for interpretation of prehistoric human activity. The palaeoenvironmental data also provide further evidence for the complexity of prehistoric woodland communities in Orkney, hinting at greater diversity than is often assumed. Additionally, differing dates for woodland decline in the two sequences highlight the dangers of over-extrapolation from trends observed in a single pollen profile, even at a very local scale.

Seeing the wood for the trees: Recent advances in the reconstruction of woodland in archaeological landscapes using pollen data

ABSTRACT This paper reviews recent advances in the reconstruction of woodland cover from palynological data. Pollen sequences record the vegetation cover of past landscapes, but translating a pollen diagram into a landscape reconstruction is not straightforward. This paper focuses on the use of pollen records to address three archaeologically relevant problems, the detection of woodland presence and extent in a largely open landscape, the reconstruction of the habitat context of a specific archaeological site, and the detection of woodland management. Research seeking to quantify past land-cover using models of pollen dispersal and deposition has led to the development of algorithms and computer software linking maps of the arrangement of land-cover with simulated pollen records at possible coring points. This software can be used to carry out thought experiments and test competing hypotheses, and also underpins the Multiple Scenario Approach to the reconstruction of past land-cover. Modern datasets of pollen surface samples and associated vegetation abundances are needed to calibrate these models, and can also provide insights into how the pollen record ‘sees’ landscapes, and therefore aid interpretation of past pollen records. We demonstrate how simulation approaches and surface sample studies are improving the scientific basis of reconstruction of past landscapes, and how these approaches offer new opportunities for communication and collaboration between archaeologists and environmental specialists.