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The Plant Macrofossil Record of Past Lake-Level Changes
- Hannon, G (author)
-
- Gaillard, Marie-Jose (author)
- Högskolan i Kalmar,Naturvetenskapliga institutionen
- (creator_code:org_t)
- 1997
- 1997
- English.
- In: Journal of Paleolimnology. - 0921-2728 .- 1573-0417. ; 18:1, s. 15-28
- Journal article (peer-reviewed)
Abstract
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- 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.
Keyword
- Paleoecology
- Paleoekologi
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- ref (subject category)
- art (subject category)
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