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A model to account for variations in holm-oak (Quercus ilex subsp. ballota) acorn production in southern Spain

100%

Garcia-Mozo H., Dominguez-Vilches E., Galan C.

Annals of Agricultural and Environmental Medicine

2012

tom 19

nr 3

One of the characteristics of holm-oak acorn production is its high variability among individuals and years. To examine the main causes of this fact, a study was conducted from 1998-2010 in a natural area of holm-oak in southern Spain, where floral phenology, fruit production, fruit size, airborne pollen emission and meteorology factors were analyzed with the ultimate aim of developing a model for forecasting holm-oak yield. Pollen emission during flowering season was the main factor determining the final acorn harvest, but also some meteorological variables played an important role in explaining acorn crop variations, especially humidity and temperature during the months of April and September. The reliability of the proposed model was externally validated using data not included in its construction; validation yielded acceptable results, with a minimum error of estimation. Our results appear to be very useful for planning cropping and pig feeding strategies. Further research could extend the use of airborne pollen counts in forest studies relating to anemophilous species, in order to optimize agricultural policies.

Detection of airborne allergen (Pla a 1) in relation to Platanus pollen in Córdoba, South Spain

100%

Alcazar P., Galan C., Torres C., Dominguez-Vilches E.

Annals of Agricultural and Environmental Medicine

2015

tom 22

nr 1

Quercus pollen season dynamics in the Iberian Peninsula: response to meteorological parameters and possible consequences of climate change

51%

Garcia-Mozo H., Galan C., Jato V., Belmonte J., Diaz de la Guardia C., Fernandez D., Gutierrez M., Aira M. J., Roure J. M., Ruiz L., Trigo M. M., Dominguez-Vilches E.

Annals of Agricultural and Environmental Medicine

2006

tom 13

nr 2

The main characteristics of the Quercus pollination season were studied in 14 different localities of the Iberian Peninsula from 1992-2004. Results show that Quercus flowering season has tended to start earlier in recent years, probably due to the increased temperatures in the pre-flowering period, detected at study sites over the second half of the 20th century. A Growing Degree Days forecasting model was used, together with future meteorological data forecast using the Regional Climate Model developed by the Hadley Meteorological Centre, in order to determine the expected advance in the start of Quercus pollination in future years. At each study site, airborne pollen curves presented a similar pattern in all study years, with different peaks over the season attributable in many cases to the presence of several species. High pollen concentrations were recorded, particularly at Mediterranean sites. This study also proposes forecasting models to predict both daily pollen values and annual pollen emission. All models were externally validated using data for 2001 and 2004, with acceptable results. Finally, the impact of the highly-likely climate change on Iberian Quercus pollen concentration values was studied by applying RCM meteorological data for different future years, 2025, 2050, 2075 and 2099. Results indicate that under a doubled CO2 scenario at the end of the 21st century Quercus pollination season could start on average one month earlier and airborne pollen concentrations will increase by 50% with respect to current levels, with higher values in Mediterranean inland areas.

Ograniczanie wyników

3 Annals of Agricultural and Environmental Medicine

3 Dominguez-Vilches E.

3 Galan C.

2 Garcia-Mozo H.

1 Aira M. J.

1 Alcazar P.

1 Belmonte J.

1 Diaz de la Guardia C.

1 Fernandez D.

1 Gutierrez M.

1 Jato V.

1 Roure J. M.

1 Ruiz L.

1 Torres C.

1 Trigo M. M.

1 2015

1 2012

1 2006

Wyniki wyszukiwania

A model to account for variations in holm-oak (Quercus ilex subsp. ballota) acorn production in southern Spain

Detection of airborne allergen (Pla a 1) in relation to Platanus pollen in Córdoba, South Spain

Quercus pollen season dynamics in the Iberian Peninsula: response to meteorological parameters and possible consequences of climate change