Abstract
A study of the airborne pollen grains in Nsukka, Nigeria, has been carried out at two different sampling heights (1.8 m and 15 m) from February 1993 to January 1994. Twenty‐six plant families (40 genera) were identified at the lower sampling height, whilst thirty‐eight families (58 genera) were identified at the height of 15 m. A total of nine and eighteen fern spore types were observed at 1.80 m and 15 m, respectively. The quantitative results indicate that the number of pollen observed at 15 m sampling height was statistically different (p<0.05) from that observed at the height of 1.80 m. The analysis of airborne pollen grains indicates three different periods: (1) dry season, (2) rainy season, and (3) late rainy season to early dry season/Harmattan. The highest pollen abundance was recorded during the late rainy season – early dry season/Harmattan followed by that of the dry season. The predominant pollen grains and fern spores trapped at both heights include Poaceae, Casuarina equisetifolia, Milicia excelsa, Elaeis guineensis, Celtis integrifolia, Alchornea cordifolia, Amaranthaceae/Chenopodiaceae, Combretaceae/Melastomataceae, Nephrolepis biserrata, Thelypteris totta, and Dryopteris spp.
Published Version
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