POLLENREGEN EN POLLENNEERSLAG

Samenvatting

Differences in aero-pollen measured by a Burkard sampler and pollen precipitated in moss cushions collected nearby were inves­tigated. The remarkably high percentages of Populus, Cupressaceae and Urtica pollen present in the air were not found with pollen precipitated in moss cushions. These types also display low values in subfossil as­semblages. The pollen wall of these three types seems to be so fragile that the pollen grains remain intact for a short time only.