Refine
Has Fulltext
- yes (4)
Document Type
- Article (4)
Language
- English (4)
Keywords
Institute
- Fakultät für Angewandte Informatik (4)
- Institut für Geographie (4)
- Professur für Physische Geographie (Biogeographie) (3)
- Fakultätsübergreifende Institute und Einrichtungen (1)
- Nachhaltigkeitsziele (1)
- Professur für Wasser- und Bodenressourcenforschung (1)
- Zentrum für Klimaresilienz (1)
- Ziel 15 - Leben an Land (1)
We investigated lake sediments from Großer Ursee, Landkreis Ravensburg, Allgäu, Baden-Württemberg, to explore whether human activity was delayed and less intense at higher sites compared to those in the adjacent lower area around Bodensee (Lake Constance). A 11.1 m high resolution pollen profile from the centre of the lake was analysed, which covers the late Würm and complete Holocene sequence, providing a continuous pollen record of 1,092 samples. Human and climate induced vegetation and landscape change is discussed. The history of human impact indicated in this profile at around 700 m in the western Allgäu, with a precipitation above 1,000 mm/year and with a less favourable climate is compared with human impact in adjacent lower landscapes, with a more favourable climate for agriculture such as the Bodensee region. Since the Neolithic period, differences in vegetation development between the regions were mainly caused by a varying intensity of human impact which itself was strongly influenced by climatic differences. In the lowlands with a warm and dry climate, human impact started earlier and was stronger than in less favourable areas. Finally, the regular occurrence of Trapa natans at Großer Ursee, much more frequent there than in the adjacent warmer landscape to the west, is discussed in terms of various ecological factors.
A late Würmian and Holocene pollen profile from Tüttensee near Chiemsee, Bavaria, covering 14 millennia of vegetation history, shows the late Würmian reforestation of the area, Holocene woodland development, and later the human impact on the landscape. In the early Holocene a distinct Ulmus phase preceded the Corylus and Quercus expansion. Afterwards, between 6000 and 4000 BCE, Picea was most common. The expansion of Fagus and Abies started at 4000 BCE, together with the decline of Ulmus. Fagus was more common than Abies. From 500 BCE Abies started to decline, Fagus has also declined from 1000 CE onwards. Before the modern times Picea/Pinus phase Quercus is prevailing. The prehistoric human impact is rather weak. A short reforestation phase at ~ 1 BCE – 1 CE hints at the rather complex migration history in this region with so called Celts, Germanic people and Romans involved. Strong human impact indicated by cereals, Plantago lanceolata, other human indicators and deforestation started at 900 CE.
