A significant trend towards an earlier end-date was found in the majority of the arboreal plant species (i.e. elm, oak, pine and birch), but the length of the season seemed unaffected.
3
—
—
The sentences
The change in percentage of the total yearly accumulated pollen count showed an increasing trend in several species.
The end-dates of the season showed a trend towards an earlier end date in the majority of the arboreal plant species, whereas a later end date was observed in the herbaceous species.