Terrestrische Kronenzustandserhebung 2002

Crown Condition Survey 2002

Wien

2003

2 Abb.

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200109238

The 2002 crown condition survey showed, with respect to all investigated species, no remarkable change in defoliation in comparison with the previous year. Out of the most common coniferous species the crown condition of Picea abies only changed imperceptible, crown condition of Larix decidua and Abies alba slightly deteriorated. The crown condition of Pinus sylvestris remarkably improved, the proportion of not defoliated sample trees increased by 10.7 percent-points. The crown condition of the most common broadleaved species Fagus sylvatica and Quercus sp. shaped up in a different way. Whilst crown condition of Fagus sylvatica obviously improved, crown condition of Quercus sp. remarkably deteriorated. The proportion of not defoliated crowns of beech increased by 9.1 percent-points, the proportion of oak decreased by 20.1 percent points.