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(Article of periodic en Anglais - 2012)

Document title

Late Quaternary ecological turnover in high arctic Lake Einstaken, Nordaustlandet, Svalbard (80° N)

published at : Concepts and implications of environmental change and human impact : studies from Austrian geomorphological research

Authors(s) and Affiliation(s)

LUOTO T.P. (1 2) ; NEVALAINEN L. (1 3) ; KUBISCHTA F. (2) ; KULTTI S. (2) ; KNUDSEN K.L. (4) ; SALONEN V.-P. (2) ;
(1) Inst. for Limnology, Austrian Academy of Sciences, Mondsee, AUTRICHE
(2) Dep. of Geosciences and Geography, Univ., Helsinki, FINLANDE
(3) Environmental Research and Protection, City Environment Centre, Helsinki, FINLANDE
(4) Dep. of Earth Sciences, Univ., Aarhus, DANEMARK

Abstract

Multiproxy palaeolimnological analyses of a sediment core record from Lake Einstaken, Nordaustlandet, give insight into long-term ecological and environmental dynamics in the High Arctic Svalbard during the last c. 13 000 cal yr bp. The foraminiferal assemblages reflected high-arctic, shallow-water conditions in an area of changing salinity conditions. The cladoceran assemblages experienced 2 complete faunal turnovers in the early part of the lacustrine sediment sequence, most likely related to inlake processes. The chironomid assemblages went through 5 distinct Holocene faunal changes that were probably mostly related to climate development and changes in nutrient conditions. The freshwater diatoms revealed 4 distinct episodes of change in their assemblages that could be related to their sensitivity to pH and nutrient status. The most distinct common feature in the Holocene faunal and floral assemblages was the pioneer phase during the early Holocene. The recent environmental changes are possibly related to a coupled effect of elevated nutrient conditions and increased temperatures

Source

Thematical fascicle

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2012, vol. 94, no 1 [pp. 337-354]

Bibliographic references : 3 p.

Collation : fig., tab.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2011.00435.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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