Vegetational Changes in Response to Alterations of Surface Roughness on M. Maiella, Italy

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Abstract
The existence, on M. Maiella, Italy, of a relationship between various physiognomic char-acteristics of vegetation and surface roughness (expressed in terms of the aerodynamic parameter Zo has been described previously. This paper shows by simple experimentation that wind is more important than shading in determining this relationship. It is also shown that if the degree of surface roughness is altered, changes of the vegetation, with time, tend towards the production of a community type appropriate to the new conditions. These field experiments demonstrate that wind is probably the most important factor determining the distribution of community types in the alpine vegetation of the Apennines.

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