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Vegetation History and Archaeobotany

, Volume 2, Issue 3, pp 145–156 | Cite as

Human impact on the Holocene forest line in the Central Alps

  • Karl-Dag Vorren
  • Brynhild Mørkved
  • Sigmar Bortenschlager
Article

Abstract

Palaeoecological investigations of a small mire in Ötztal, Tyrol, Austria, situated about 50 m above the potential tree-line, indicates that human impact on the landscape started with burning of heath at approximately 5300 B.P. At about 4800 B.P. a weak increase in important apophytes may reflect the local presence of domestic animals. Between 4000 and 3500 B.P. a clear decline in pastoral activity occurred. From 3000 B.P. a strong increase in the representation of apophytes suggests local summer settlement, while in the interval 2600–2200 B.P. anthropogenic activity declined. After 2150 B.P. there was a marked increase in summer farm activity. Fresh information is presented on tree-line fluctuations during the Holocene: Pinus cembra forest ascended above the present potential tree-line by more than 50–100 m between 9000–8000 B.P., 6000–5500 B.P., and 3800–3000 B.P. A Betula maximum between 7000 and 5500 B.P. is probably due to succession in nearby avalanche tracks, as well as to a higher tree-line. Low humification and low loss-on-ignition values around 6000 B.P. may reflect the Frosnitz stadial (6900–6000 B.P.). The Rootmoos I stadial (5400 B.P.) and probably the early Sub-Atlantic stadial maximum (3000–2300) are also reflected in the physical properties of the peat profile.

Key words

Tree-line Holocene Anthropogenic impact Climate change Alps 

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References

  1. Berglund BE (ed) (1986) Handbook of Holocene palaeoecology and palaeohydrology. Wiley, ChichesterGoogle Scholar
  2. Bortenschlager S (1970) Waldgrenz- und Klimaschwankungen im pollenanalytischen Bild des Gurgler Rotmooses. Mitt Ostalp Ges Vegetationskd 11: 19–26Google Scholar
  3. Bortenschlager S (1984) Beiträge zur Vegetationsgeschichte Tirols. I. Inneres Ötztal und unteres Inntal. Ber Nat Med Ver Innsbruck 71: 19–56Google Scholar
  4. Bortenschlager S (1987) Glaciers fluctuations and changes in forest-limit in the Alps. In: Gaillard MJ (ed) IGCP 158 Palaeohydrological changes in the temperate zone in the last 15.000 years. Lundqua Report 27: 43–45Google Scholar
  5. Bortenschlager S, Kofler W, Oeggl K, Schoch W (1992) Erste Ergebnisse der Auswertung der vegetabilischen Reste vom Hauslabjochfund. In: Höpfel F, Platzer W, Spindler K (eds) Der Mann im Eis. 1. University of Innsbruck, Innsbruck, pp 307–312Google Scholar
  6. Clymo RS (1970) The growth of Sphagnum: methods of measurements. J Ecol 58: 13–49Google Scholar
  7. Ellenberg H (1988) Vegetation ecology of Central Europe, 4th edn. Cambridge University Press, CambridgeGoogle Scholar
  8. Fægri K, Iversen J (1989) Textbook of pollen analysis, 4th ed, by Faegri K, Kaland PE, Krzywinski K. Wiley, New YorkGoogle Scholar
  9. Jensen C (1991) Vegetasjons- og jordbrukshistorien p» en „Leikvang-g»rd“ i Vester»len - en palynologisk undersøkelse [Vegetation- and agricultural history of a farm belonging to the Leikvang name category]. Thesis in ecological botany, University of TromsøGoogle Scholar
  10. Jochimsen M (1972) Pollenniederschlag und rezente Vegetation in Gletschervorfeldern der Alpen. Ber Dtsch Bot Ges 85: 13–27Google Scholar
  11. Rybnícek K, Rybnícková E (1977) Mooruntersuchungen im oberen Gurgltal, Ötztaler Alpen. Folia Geobot Phytotaxon 12: 245–291Google Scholar
  12. Schedl W (1989) Pollenflugsaison 1988 in Österreich. Ber Nat Med Ver Innsbruck Suppl. 5: 1–90Google Scholar
  13. Schiechtl HM (1970) Die Ermittlung der potentiellen Zirbenwaldfläche im Ötztal. Mitt Ostalp Ges Vegetationskd 11: 197–204Google Scholar
  14. Sjörs H (1950) Regional studies in north Swedish mire vegetation. Bot Not 103: 173–222Google Scholar
  15. Sjörs H (1983) Mires of Sweden. In: Gore AJP (ed) Mires: swamp, bog, fen and moor. B. Regional studies. Elsevier, Amsterdam, pp 69–94Google Scholar
  16. Wallén B, Falkengren-Gremp U, Malmer N (1988) Biomass, productivity and relative rate of photosynthesis of Sphagnum at different water levels on a South Swedish peat bog. Holarct Ecol 11: 70–76Google Scholar

Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Karl-Dag Vorren
    • 1
  • Brynhild Mørkved
    • 1
  • Sigmar Bortenschlager
    • 2
  1. 1.Institute of Biology and GeologyUniversity of TromsøTromsøNorway
  2. 2.Botanical InstituteUniversity of InnsbruckInnsbruckAustria

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