Rodríguez de la Cruz David, Sánchez Reyes Estefanía, Sánchez Sánchez José
Department of Botany, Hispano-Luso Agrarian Research Center, University of Salamanca, Campus Miguel de Unamuno s/n, 37007, Salamanca, Spain.
Int J Biometeorol. 2009 May;53(3):231-7. doi: 10.1007/s00484-009-0208-5. Epub 2009 Feb 10.
Temporal variation of airborne bracken (Pteridium aquilinum) spores concentration in Salamanca during 10 years from January 1998 to December 2007 were studied by using a Burkard spore trap, and correlations with some meteorological parameters were analyzed. The number of spores that were counted was very low, due probably to the distance between the spore trap and the main bracken populations which were located 70 km away from the city. Long-range transport caused by winds coming from the Second Quadrant (IIQ) is supposed to be responsible for the appearance of bracken spores in Salamanca. The season period from August to late October shows the most intense spore dispersal process, with an early morning distribution along the day. Years 2002 and 2007 with a low quantity of airborne spores were also characterized by low mean temperatures, always under 18 degrees C from May to June. Daily spore concentration shows positive correlation with temperature and sun hours but negative with IVQ winds and with relative humidity. No correlation between daily spore concentration and rainfall was found. Also, a positive correlation between number of spores and IIQ winds was observed during the main spore season (MSS) and prepeak period (PRE).
1998年1月至2007年12月的10年间，利用伯卡德孢子捕捉器研究了萨拉曼卡空气中蕨类（欧洲蕨）孢子浓度的时间变化，并分析了其与一些气象参数的相关性。计数的孢子数量非常少，这可能是由于孢子捕捉器与距离城市70公里的主要蕨类种群之间的距离所致。来自第二象限（IIQ）的风引起的远距离传输被认为是萨拉曼卡出现蕨类孢子的原因。8月至10月下旬的季节期间显示出最强烈的孢子扩散过程，全天呈清晨分布。2002年和2007年空气中孢子数量较少，其特征还包括平均温度较低，5月至6月始终低于18摄氏度。每日孢子浓度与温度和日照时数呈正相关，但与IVQ风及相对湿度呈负相关。未发现每日孢子浓度与降雨量之间存在相关性。此外，在主要孢子季节（MSS）和峰值前期（PRE）观察到孢子数量与IIQ风之间存在正相关。
