Phytogenic hillocks as an effect of indirect human activity

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Description :
Phytogenic hillocks are landforms typical for areas built of blown sands. They are an effect of cooperation of wind with bushy vegetation of specific features. One of such areas is located in Silesian Upland in southern Poland (so-called Bledow Desert), which beginning goes back to the Middle Ages. It is connected with deforestation, mainly for the needs of contemporary lead, silver and zinc metallurgy. Presently this area is covered in result of intentional vegetation introduction as well as by natural vegetation expansion and succession. One of species intensively entering into this area is Salix arenaria. And just at participation of this bushy willow in deflation areas very characteristic phytogenic hillocks of heights reaching up to 1,5 m are here created using more humid clayey insertions of substratum. In area discussed it is possible to observe different development stages of phytogenic hillocks : from initial through mature to disappearing ones. The age of hills was determined on the base of dendrochronological analysis. These hills have different shapes and heights, which are conditioned by the intensity of aeolian processes. It is possible to state that phytogenic hillocks of so-called Bledow Desert are created by natural physicogeographical processes but conditions for their development were preparated by human being. Thus they are the effect of indirect anthropogenic activity.

Type de document :
Article de périodique

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2009, vol. 53, n°. 3, p. 359-370, nombre de pages : 12, Références bibliographiques : 1 p.

Date :

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger

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Droits :
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