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Steppe Expansion in Patagonia?

Published online by Cambridge University Press:  20 January 2017

Thomas T. Veblen  and
Vera Markgraf
Thomas T. Veblen
Affiliation:
Department of Geography, University of Colorado, Boulder, Colorado 80309 USA
Vera Markgraf
Affiliation:
Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309 USA
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Abstract

Westward expansion of the Patagonian steppe and retrocession of Andean forests due to increasing aridity over the past one or two millennia has been a persistent theme in the ecological and paleoecological literature for at least half a century. New evidence from pollen profiles, tree-ring analysis, vegetation structure, and photographic and documentary historical sources does not show the expansion of the steppe. Instead, over the past century trees have invaded the steppe as a consequence mainly of human-induced changes in the fire regime, and trees have regenerated in forest areas that were heavily burnt at the onset of European colonization.

Type
Research Article
Information
Quaternary Research , Volume 30 , Issue 3 , November 1988 , pp. 331 - 338
Copyright
University of Washington

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