The parameter deciding the total seasonal pollen release,Ntot, has a climatological value specific for each tree type (Table1). The dependence ofNtoton year and location has been disregarded in the original model39, but it is straightforward to introduce it via a correction map. The control va...
are obviously acting as traps for the pollen rising above the forest canopy. Therefore, they can in no way be compared with tundra sites even if they themselves support a vegetation which is close to a tundra type one. The forest is far too close. The second point which becomes apparent ...
stability or maintaining the meniscus location for long duration25, because of the relatively small pollen volume and occurrence of tip plugging during the meniscus oscillation due to the high viscosity of the pollen fluids in all treatments examined. Recently, it has been pointed that most analyses...
The location of the trap, on the city campus of the University of Melbourne, conformed to the Australian Standard AS 2922-1987 for the siting of ambient air sampling units for environmental monitoring (Standards Association of Australia, Sydney, NSW). Pollen grains were trapped on a glass ...
Local sources of pollen have a significant impact on sampled pollen, and a location change could produce different pollen concentrations (Sofiev et al. 2006). The geographic distribution of the NAB stations is relatively sparse in the western half of the CUSSC region. This restricts our ability...
The Krkonoše mountains. These, rising to over 1,500 m, are part of the high Sudetes in the northern outlier of the Bohemian massif. The submontane zone (400–800 m) has broadleaved and mixed forests ofFagustogether withPiceaandAbies,Acer pseudoplatanus,Fraxinus,SorbusandAlnus incana. Above...
The rising temperatures are reflected in the pollen con- centrations and by increased number of species. Values more than double from 16,000 to 37,000 pollen grains per c m3 of sediment. Favourable growing conditions can be attributed to improved soil conditions and soil formation in the ...
1, location map. MCD conducted field work, conceived the initial research idea and participated in the writing of the manuscript. MJRR supervised the laboratory work in relation to the preparation, observation and determination of the pollen samples. He participated in the original research idea. ...
otherwise negative. Temperature models were significantly positive when pollen concentrations rose with rising temperatures, as in the case of weeds. Summer rains – often torrential – reduce temperatures. As temperatures rise again and humidity deceases when skies clear, dehiscence occurs (Dahl et al...
(solid line, incompatible interpopulation pollination) or in styles of LA0407 (dotted line, compatible intrapopulation pollination) with standard deviation for each time point.bRepresentative image of LA0407 pollen tube growth in LA1777 pistils at each time point; arrowhead points to the location ...