Alder pollen in Finland ripens after a short exposure to warm days in early spring, showing biennial variation in the onset of pollen ripening
Linkosalo, T., Le tortorec, E., Prank, M., Pessi, A.-M., & Saarto, A. (2017). Alder pollen in Finland ripens after a short exposure to warm days in early spring, showing biennial variation in the onset of pollen ripening. Agricultural and Forest Meteorology, 247, 408-413. https://doi.org/10.1016/j.agrformet.2017.08.030
Published inAgricultural and Forest Meteorology
© 2017 Elsevier B.V. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
We developed a temperature sum model to predict the daily pollen release of alder, based on pollen data collected with pollen traps at seven locations in Finland over the years 2000–2014. We estimated the model parameters by minimizing the sum of squared errors (SSE) of the model, with weights that put more weight on binary recognition of daily presence or absence of pollen. The model results suggest that alder pollen ripens after a couple of warm days in February, while the whole pollen release period typically takes up to 4 weeks. We tested the model residuals against air humidity, precipitation and wind speed, but adding these meteorological features did not improve the model prediction capacity. Our model was able to predict the onset of pollen season with similar accuracy as models describing only the start of the pollen release period (average prediction error 8.3, median 5.0 days), while for the end of the pollen release period the accuracy of our predictions was not as good. We split the pollen data into odd and even years, and fitted our model separately to each half. Difference in the parameter values suggests a biennial behavior in the onset of pollen ripening, with almost two weeks of difference in the modeled starting date of the pollen development. Monte Carlo resampling of the observation data confirmed that the difference is not just a random anomaly in the data. ...
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Life-space mobility assessment in older people in Finland; measurement properties in winter and spring Portegijs, Erja; Iwarsson, Susanne; Rantakokko, Merja; Viljanen, Anne; Rantanen, Taina (BioMed Central Ltd., 2014)Background: Life-space mobility refers to the spatial area an individual moves through, the frequency and need for assistance. Based on the assumption that measurement scale properties are context-specific, we tested the ...
In-season variation of skating load at different playing positions in male elite ice hockey : a single season longitudinal study Reinikainen, Miika (2021)Aikaisemmat tutkimukset korkean intensiteetin joukkueurheilulajeista osoittavat, että pitkä kilpailukausi vaikuttaa monin tavoin negatiivisesti pelaajien fyysisiin ominaisuuksiin ja sitä kautta myös suorituskykyyn kauden ...
Analysis of heteroplasmy in bank voles inhabiting the Chernobyl exclusion zone : A commentary on Baker et al. (2017) "Elevated mitochondrial genome variation after 50 generations of radiation exposure in a wild rodent." Kesäniemi, Jenni; Boratyński, Zbyszek; Danforth, John; Itam, Prince; Jernfors, Toni; Lavrinienko, Anton; Mappes, Tapio; Møller, Anders Pape; Mousseau, Timothy A.; Watts, Phillip C. (Blackwell Publishing Ltd, 2018)
Thonig, Anne; Banta, Gary Thomas; Hansen, Benni Winding; Knott, Emily (John Wiley & Sons Ltd, 2017)Poecilogonous species show variation in developmental mode, with larvae that differ both morphologically and ecologically. The spionid polychaete Pygospio elegans shows variation in developmental mode not only between ...
Seasonal variations in endurance performance, and aerobic and anaerobic variables in competitive cross country skiers Hecker, Jeremy (2016)Cross country skiing is known as an endurance sport and both aerobic and anaerobic systems have a major impact on performance in cross country skiers. Coaches and athletes use periodized training programs to optimize ...