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Environmental impacts of the Norse settlement: palaeoenvironmental data from Mývatnssveit, northern Iceland

Lawson, IT; Gathorne-Hardy, FJ; Church, MJ; Newton, AJ; Edwards, KJ; Dugmore, A.J; Einarsson, Á


IT Lawson

FJ Gathorne-Hardy

AJ Newton

KJ Edwards

A.J Dugmore

Á Einarsson


The first stratigraphically continuous pollen profile spanning the Norse and Medieval periods from the archaeologically-rich My´vatnssveit region of northern Iceland is presented. Detailed analyses were made of the tephra, sediment characteristics, pollen and chironomids of a 3 kyr sediment sequence from Helluvaðstjo¨ rn, a small, shallow lake. The pollen data show a steady decline in the percentage abundance of tree birch (Betula pubescens) pollen between the Norse settlement (landna´m, c. AD 870) and c. AD 1300, a pattern that contrasts with the abrupt fall in birch pollen percentages immediately following the Norse colonization at almost all previously studied sites in Iceland. Some lines of evidence suggest that the gradual birch decline could be a result of reworking of soil pollen, but independent evidence suggests that this may not necessarily be the case. The pollen record indicates that birch woodland was replaced by acidophilic taxa (notably Empetrum nigrum and Sphagnum), again contrasting with the more usual pattern of Poaceae expansion seen in post-landna´m pollen diagrams from mires close to farm sites. Chironomid and Pediastrum accumulation data show that the limnic environment became more productive immediately after landna´m, probably because of anthropogenic disturbance. An increase in sedimentation rate after landna´m appears initially to have been caused by increased lake productivity, while reworked inorganic soil materials became a significant contributor to the sediments after c. AD 1200. The data suggest that the impact of settlement on terrestrial vegetation may have been more variable than previously thought, while freshwater ecosystems experienced significant and rapid change.


Lawson, I., Gathorne-Hardy, F., Church, M., Newton, A., Edwards, K., Dugmore, A., & Einarsson, Á. (2007). Environmental impacts of the Norse settlement: palaeoenvironmental data from Mývatnssveit, northern Iceland. Boreas: An International Journal of Quaternary Research, 36(1), 1-19.

Journal Article Type Article
Publication Date Jan 1, 2007
Deposit Date Dec 2, 2008
Journal Boreas
Print ISSN 0300-9483
Electronic ISSN 1502-3885
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 36
Issue 1
Pages 1-19
Publisher URL