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New methods applied to interpretations of pollen data in the Holocene - selected examples from the last decade

100%

Pidek I. A., Filbrandt-Czaja A., Noryskiewicz A. M., Noryskiewicz B., Rasanen S.

Ecological Questions

2009

tom 11

The results of palynological analyses of the Holocene deposits and modern pollen deposition in Poland and Finland are used to illustrate the progress in pollen analysis - the main palaeoecological method. The increased potential of modern palaeoecology for reconstruction of vegetation and for drawing conclusions on other environmental variables (climate, water conditions, landscape, anthropogenic disturbances) is demonstrated. Pollen analysis - develops at present interpretive tools for precise reconstruction of the structure and composition of vegetation and climate conditions. The progress consists in the quantitative presentation of pollenvegetation-climate relationships based on the examination of modern pollen deposition. The application of numerical analyses to pollen data allows correlating pollen spectrum features with the landscape/vegetation type. Special attention is paid to the Holocene vegetation changes of the transitional zone between boreal forest and tundra in the areas subjected to weak anthropopression (e.g. Lapland), which reflect climatic changes. Databases of modern pollen analogues are based on analysis of samples of surface mosses and contents of Tauber traps. These traps are used in Poland in investigations conducted as a part of the Pollen Monitoring Programme (http://pmp.oulu.fi). The correlation of Tauber-trap data with aerobiological ones contributes to understanding of the relationship between pollen production and climate elements. Additionally, the precise C14 dating allows a near-annual resolution in fossil deposits to be obtained more frequently. Due to time scales comprising hundreds of years, pollen analysis can provide means to resolve questions inaccessible for direct observation.

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Nine-year record of Alnus pollen deposition in the Roztocze Region [SE Poland] with relation to vegetation data

100%

Pidek I. A.

Acta Agrobotanica

2007

tom 60

nr 2

Pollen deposition of alder has been measured at ground level by means of nine modified Tauber traps in different plant communities according to rules of the Pollen Monitoring Programme (http://pmp.oulu.fi). The series of data covers the period 1998-2006. The area under investigation is situated in the Roztocze (surroundings of the Guciów village) within the protective zone of the Roztocze National Park. During nine years of monitoring, significant variations were observed between single years of deposition. The occurrence of peak years (1998, 2001, 2003 and 2006) connected with higher production of Alnus pollen was observed at many pollen monitoring sites, but its relationship with different proportions of alder within the surrounding vegetation seems rather weak. The average value of annual pollen deposition of Alnus for the whole region was calculated at ca. 1370 grains · cm⁻². At the sites situated within the open landscape, pollen influx values ranged from 442 (in 2005) to 6894 (in 1998). It seems that other factors than the proportion of alder within the vegetation control the deposition of Alnus pollen. Long-distance transport and meteorological factors such as wind speed and direction should be taken into account in future studies.

Ograniczanie wyników

1 Acta Agrobotanica

1 Ecological Questions

2 Pidek I. A.

1 Filbrandt-Czaja A.

1 Noryskiewicz A. M.

1 Noryskiewicz B.

1 Rasanen S.

1 2009

1 2007

Wyniki wyszukiwania

New methods applied to interpretations of pollen data in the Holocene - selected examples from the last decade

Nine-year record of Alnus pollen deposition in the Roztocze Region [SE Poland] with relation to vegetation data