| 1. |
- Ammann, B, et al.
(author)
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Switzerland
- 1996
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Other publication (other academic/artistic)
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| 2. |
- Berglund, B E, et al.
(author)
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Sweden
- 1996
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Other publication (other academic/artistic)
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| 3. |
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| 4. |
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| 5. |
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| 6. |
- Gedda, B, et al.
(author)
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Lateglacial and Early Holocene environments inferred from a tufa deposit at Fyledalen, S. Sweden
- 1999
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In: GFF. - 1103-5897 .- 2000-0863. ; 121, s. 33-41
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Journal article (peer-reviewed)abstract
- A reinvestigation of a tufa deposit in Skane, including a number of biostratigraphical methods and chronology was carried out. The tufa was formed in a paludal environment during the time period c. 9,500 to 8,000 BP. This period is characterised by exceptional low lake levels and high summer temperatures in southern Sweden. This may suggest that optimal conditions for tufa formation at the site coincided with warm and dry climate conditions, a low groundwater table, and high evaporation. During periods with colder conditions and/or higher groundwater table pear was deposited. The changes in the local environment at and around the site were inferred from the biostratigraphical records of pollen, plant macrofossils, molluscs, and insects. The results demonstrate a development from a dwarf shrub tundra during the Late-glacial, which turned to an open birch/pine woodland around 10,000 BP. Atc. 9,000 BP hazel and birch were probably the dominant tree species in the woodland. The mollusc record suggests that the woodland remained relatively open until c. 8,500 BP when tree taxa such as alder, oak and elm became established in the Fyledalen valley. The site remained a marsh throughout the studied period, however, the results indicate a succession of different marsh plant communities.
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| 7. |
- Hannon, G, et al.
(author)
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The Plant Macrofossil Record of Past Lake-Level Changes
- 1997
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In: Journal of Paleolimnology. - 0921-2728 .- 1573-0417. ; 18:1, s. 15-28
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Journal article (peer-reviewed)abstract
- Plant-macrofossil analysis is one of the most useful biostratigraphical methods for the reconstruction of former lake-level changes. The distribution of submerged, floating-leaved and emergent lake-shore vegetation is mainly dependant on water depth, but water chemistry and nutrient status must also be taken into account when interpreting water-level changes. Lake-level studies should be based on the investigation of several littoral cores along a transect perpendicular to the lake-shore. Multiple cores are essential for separating genuine lake-level changes from other processes influencing the plant-macrofossil record. Physical analyses of sediment stratigraphy provide important additional information to the plant-fossil record, because natural infilling processes and erosion from the catchment must be distinguished from climatic events causing a change in the water level. Here we review several important concepts, including suitability of lakes for lake-level study, the degree of detail required in the analysis, and macrofossil records of lake-level changes, and illustrate those concepts by examples from southern Sweden and Minnesota. We discuss how to reconcile alternative hypotheses for the stratigraphic changes seen in the macrofossil assemblages.
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