The peaty sediments from a bird cliff (north-west Spitsbergen) and two skua-mounds (central and east Spitsbergen) have been studied palynologically. Results show that (1) the vegetation on the bird cliff has been stable and peat-forming for at least the last 5 centuries, and (2) there has been a succession of various dominant plant species on one of the skua-mounds for more than 4000 years and on the other for c. 4500 years. Peat formation on these mounds has probably been interrupted several times.