Hadrian’s Wall in Context: A Multi-Proxy Palaeoenvironmental Perspective from Lakes
AbstractThe Hadrian’s Wall area has more pollen sequences spanning Late Antiquity than any other part of the British Isles, but most are from peat bogs, posing problems of distinguishing between changes in the local wetland vegetation and events in the wider landscape. Here, an alternative perspective is offered by multi-proxy analyses of sediments from two lakes—Crag Lough and Grindon Lough—adjacent to the central sector of Hadrian’s Wall and the Stanegate, respectively. These demonstrate that at least the central sector of the Hadrianic frontier was constructed in a landscape already shaped by two millennia of woodland clearance, burning, farming and soil erosion. Roman military presence led to changes in agricultural and settlement patterns, but the overall impact, from an environmental perspective, was minor compared to that of prehistoric peoples. Roman withdrawal led to a relaxation in land use intensity, resulting in woodland regeneration on areas least favourable to agriculture, probably encouraged by climatic deterioration. The landscape, overall, remained predominantly open and agricultural, however, resembling that of the Late Iron Age. A multi-proxy multi-site approach offers the greatest prospect of understanding environmental and landscape changes connected with Roman military presence and withdrawal, and the varied spatial and temporal scales on which they occurred.