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(Article of periodic en Anglais - 1999)

Document title

Environmental change in the Kalahari : integrated land degradation studies for nonequilibrium dryland environments

Authors(s) and Affiliation(s)

DOUGILL A.J. ; THOMAS D.S.G. ; HEATHWAITE A.L. ;

Abstract

Patterns of ecological change, notably increased bush dominance, have been linked to increased cattle-grazing intensity, but it remains contentious whether these changes represent land degradation. Given the inherent ecological variability of drylands, the AA. argue that degradation assessments should be based, not on ecological observations alone, but on the study of long-term changes in pastoral production figures and on changes in the ecologically determining factors of soil water and soil nutrient avaibility. They present a model of ecosystem dynamics that does not display bush encroachment as a definite form of land degradation

Source

Article of periodic

published at : Annals of the Association of American Geographers / ISSN 0004-5608 / CODEN AAAGAK

Editor : Association of American Geographers, Washington, DC - ETATS-UNIS (1911)

Millesime : 1999, vol. 89, no3 [pp. 420-442]

Bibliographic references : 4 p.

Collation : Illustration ;

Language

Anglais

Localisation

American geological institute

INIST-CNRS, Cote INIST : 5096

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2000.
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