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A statistic study of atmospheric pollen in Japan
1School of Pharmaceutical Science, Toho University, Chiba, Japan.
Allergie Et Immunologie
|April 1, 1993
Summary
Airborne pollen types in Japan shifted between 1969-1971 and 1990-1991, indicating environmental changes. Statistical analysis revealed non-normal distribution patterns in pollen frequency, differing between trees and herbs.
Area of Science:
- Aerobiology
- Palynology
- Environmental Science
Background:
- Pollinosis incidence is linked to airborne pollen exposure.
- Long-term monitoring of airborne pollen is crucial for understanding environmental changes and allergy prevalence.
Purpose of the Study:
- To investigate changes in airborne pollen types in Funabashi, Chiba, Japan, from 1969 to 1991.
- To analyze the statistical distribution of airborne pollen grains and its relation to environmental shifts.
Main Methods:
- Volumetric sampling of airborne pollen.
- Microscopic identification and classification of pollen grains (Ikuse classification).
- Statistical analysis including circular plots, semi-logarithmic plots, and tests of skewness (g1) and kurtosis (g2).
Main Results:
- Dominant airborne pollen types shifted from 1-aperturate 3C(ab) in 1969-1970 to 1-aperturate 3B in 1990-1991.
- Statistical analysis showed significant skewness (g1) and kurtosis (g2) in pollen distribution, deviating from normal distribution.
- Pollen distribution peaks were flatter for herbs and sharper for trees.
Conclusions:
- Environmental changes over twenty years influenced airborne pollen composition in Japan.
- Pollen grain frequency distributions exhibit non-normal patterns, with distinct characteristics for arboreal and herbaceous species.