Figure 1.Map showing transect for fieldwork. The proposed plan is to follow pollen production, where pollen release timing varies with environmental factors associated with increase in latitude, e.g. pollen is released in the south earlier than the north. Fieldwork transect will begin in the Spanish Pyrenees, travelling northwards to Scotland. Locations: A (purple marker) = Val d'Aran, Pyrenees; B (orange marker) = Clermont Ferrand, Central Massif; C (pink marker) = north Wales; D (green marker) = Ben Lawes, Scotland.