Statistical analysis.

S3.1 Fig. Least square means ± SE for the three seasonal groups for each of the pollen species. Note least square means estimates for <i>Salix</i>, <i>Aesculus</i>, <i>Aster Solidago</i> type, <i>Hedera</i>, <i>Rosa</i>, <i>Papaver</i> type, <i>Trifolium repens</i> and <i>Raphanus</i> type were all estimated by the model that only included period. S3.1 Table. Pairwise comparison. Least square means differences in pollen diversity for period in Model 1 and Model 2, respectively. df = 235. S3.2 Table. Effect of landscape variables on abundance (presence of pollen species). Note that all tests were made as univariate tests on log transformed distance and area. If the G matrix was not positive definite, we omitted the test from the table. (DOCX)