Ambient temperature
Transition of air temperature in the study site indicated relatively
stable thermal conditions during the survey period (term 1–5) in both
years (Fig. 1). Daily mean temperatures during the flowering season
ranged between 10–15 ºC, daily minimum temperatures were 6–10 ºC,
while daily maximum temperatures fluctuated between 10 and 23 ºC. Thus,
the seasonal gradient of thermal conditions was less clear during the
flowering periods. During the winter time, from early December to
mid-March, daily minimum temperatures were often below zero, but daily
maximum temperatures mostly remained above zero.