RT Journal Article
T1 Use of phenological and pollen-production data for interpreting atmospheric birch pollen curves
A1 Jato Rodríguez, Victoria
A1 Rodríguez Rajo, Francisco Javier
A1 Aira Rodríguez, María Jesús
K1 Betula
K1 Phenology
K1 Pollen production
K1 Airborne pollen
K1 Spain
AB Although aerobiological data are frequently used as a fl owering sign in phenological research, airborne pollen counts are infl uenced by a number of factors affectingpollen curves. A study was made about the reproductive biology of birch and environmental factors infl uencing its pollen release and transport, in order to achieve a reliableinterpretation of Betula pollen curves. Aerobiological data were recorded in 2002 and2003 at two sites in NW Spain and phenological observations were carried out on 20trees from four Betula populations (three Betula alba L. and one B. pendula Roth.). Pollen production was calculated for six Betula alba trees. Chilling and heat requirementsfor triggering development were calculated. Due to differences in the geographical location, budbreak and fl owering started fi rst in Betula pendula. The fl owering period lastedfrom 8-13 days. Reduced pollen output per anther and catkin in individual trees in 2003prompted a marked decline in overall pollen production. Major differences observed inbirch pollen curves were attributed to the infl uence both of weather conditions and pollentransport from areas where the fl owering occurs at a different time. Heat requirementscalculated using phenological and aerobiological data were similar when the peak pollen-count date was used.
PB Institute of Rural Health (Lublin)
SN 1232-1966
YR 2007
FD 2007
LK http://hdl.handle.net/10347/22846
UL http://hdl.handle.net/10347/22846
LA eng
NO Jato, V., Rodríguez-Rajo, F. J., & Aira, M. J. (2007). Use of phenological and pollen-production data for interpreting atmospheric birch pollen curves. Annals of Agricultural and Environmental Medicine, 14(2).
DS Minerva
RD 24 abr 2026