Geography Reference
In-Depth Information
A
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2
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5
B
1
2
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4
5
6. Early models of landscape evolution involving a 'cycle of erosion':
(A) slope decline (the Davisian model) in temperate environments;
and (B) slope retreat, more applicable in semi-arid environments. The
numbers indicate successive stages in the evolution of hillslopes
'stage' that was paramount as so little was known about the effects
of geomorphological processes on the underlying geological
structure. Comparable evolutionary or developmental models
were developed in other branches of physical geography. An
American ecologist, Frederick E. Clements, coined the term
'climatic climax' for the terminal stage of a succession of plant
communities. His role in biogeography was similar to that of
Davis in geomorphology. In climatology, similar ideas were
developed to explain patterns of climatic change, which are
outlined later.
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