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An Aeropalynological study of the Porto region (Portugal) |
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| Authors: | Ilda Abreu Helena Ribeiro Mário Cunha |
| Institution: | 1. Departamento de Botanica, Faculdade de Ciências, Rua do Campo Alegre, 1911, 4150-181, Porto, Portugal 2. Instituto de Biologia Molecular e Celular – U.P., Rua do Campo Alegre, 823, 4150-180, Porto, Portugal (author for correspondence 4. Faculdade de Ciências, Sec??o Autónoma de Ciências Agrárias, 4485, Vair?o 5. CECA-ICETA, Rua Padre Armando Quintas, 4485-661, Vair?o |
| Abstract: | The annual airborne pollen variation of thePorto region was studied from November 2001 toOctober 2002 using a Cour type sampler. A totalof 170 × 106 grains m?2 belonging to63 taxa was observed. The vegetationsurrounding the sampling point includesornamental, non-ornamental trees, shrubs andherbaceous species. The main pollen types wereCupressaceae, Gramineae, Hamamelidaceae, Pinaceae,Urticaceae, Quercus spp.,Acer spp., Myrtaceae,Caryophyllaceae, Oleaceae,Betulaceae and Plantago spp. thatrepresented 88% of the Porto pollen spectrum.Gramineae, Cupressaceae,Myrtaceae, Oleaceae, Pinaceae andUrticaceae pollen are found throughoutthe year. Concerning total pollenconcentration, the distribution throughout theyear is very irregular, with several annualpeaks, with the maximum concentrationregistered between the end of March and thefirst two weeks of April and the lowestobserved during autumn. |
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