Variation in Artemisia pollen seasons in Central and Eastern Europe

摘要: This paper aims to address some gaps in current knowledge by studying temporal and spatial variations Artemisia pollen counts (2000-2009) at 13 sites located different biogeographical areas of Central Eastern Europe. Analysis showed that start dates seasons are greatly dependent on temperature during June July, with hot summer temperatures having a tendency delay flowering. However, this relationship is not linear the rate which become later increases when mean minimum June-July reach threshold about degrees C. No explanation for season intensity could be found. The geographical location or amount urbanisation did influence, either positively negatively, seasonal index. Second peaks can described as late flowering species, mainly occurred area south Carpathian Mountains. These second significantly influence index, contributing over 50% season's total recorded one site. (C) 2012 Elsevier B.V. All rights reserved. (Less)