Crispen Kelly L, Gillespie Donald N, Weiler Emily C, Noonan Curtis W, Hamilton Raymond F, Ward Tony J
The University of Montana, Center for Environmental Health Sciences, Missoula, Montana, 59812, USA.
Grana. 2010 Jun;49(2):128-133. doi: 10.1080/00173131003587049.
A study was conducted in Missoula, Montana to compare local pollen counts from 1978 with those measured nearly 30 years later in 2006 using two different measurement techniques (Durham gravimetric sampler and a Burkard volumetric sampler). Trends in peak pollen times measured during the spring, summer and autumn, respectively, were compared between the two years by Pearson's correlation and frequency of occurrence of plant genus. Meteorological conditions were also examined during each of the two study periods.In comparing the two years, there was a statistically significant linear association between the different counts for the months of April through August, with similar levels of pollen types for any given month. The five predominant pollen types (based on counts) identified in each study were Pinus, Poaceae, Populus, Alnus, and Betula for 2006 and Pinus, Poaceae, Populus, Acer and Artemisia for 1978. In summary most of the genera displayed similar peak pollination timing between the two years, suggesting that results from the Durham (gravimetric) and Burkard (volumetric) sampling methods are comparable when reporting relative frequency of occurrence.
在蒙大拿州的米苏拉市开展了一项研究，旨在使用两种不同的测量技术（达勒姆重量采样器和伯卡德容量采样器），比较1978年当地的花粉计数与近30年后2006年测量的花粉计数。通过皮尔逊相关性和植物属的出现频率，比较了这两年分别在春季、夏季和秋季测量的花粉峰值时间趋势。在两个研究期间的每一个时间段内，还对气象条件进行了检查。在比较这两年时，4月至8月各月不同计数之间存在统计学上显著的线性关联，任何给定月份的花粉类型水平相似。在每项研究中确定的五种主要花粉类型（基于计数），2006年为松属、禾本科、杨属、桤木属和桦木属，1978年为松属、禾本科、杨属、槭属和蒿属。总之，大多数属在这两年间显示出相似的授粉峰值时间，这表明在报告相对出现频率时，达勒姆（重量）和伯卡德（容量）采样方法的结果具有可比性。
