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You are here: Home Research and Publications Projects Succession of windthrown forests in relation to stand conditions in several regions of Baden- Württemberg and in relation to stand treatment on acidic soils in the Odenwald mountains
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Succession of windthrown forests in relation to stand conditions in several regions of Baden- Württemberg and in relation to stand treatment on acidic soils in the Odenwald mountains

Summary

Situation:

Forests in central Europe were affected by the damaging storm events „Vivian“ and „Wiebke“ in late winter 1990. These were the most severe storm events until then. New reforestation options became necessary due to the storm severity, the size and number of affected areas.

Relation to stand conditions:

The previous forest stands were dominated by Norway spruce. These forest stands are left to natural succession. 69 permanent sample plots in 21 windthrown forest stands distributed over several regions of Baden-Württemberg were demarcated. Vegetation surveys have been carried out. Strict forest reserves as well as managed public forests were selected for four periods as sample plots. Cleared stands have a lager bigger number of species which are typical of early succession phases than stands with left tree trunks. Comparisons between acidic, middle and alcaline soils show the increasing species richness and vegetation dynamic with increasing pH-value. Stands with low pH-value are poor in species and are mainly recolonised by Norway spruce when they are committed to natural regeneration.

Relation to stand treatment:

Analysis of different treatments in windthrown forests managed by public and private owners will be done using vegetation surveys and guideline-based interviews with experts. All sample plots are located on acidic soil over sandstone bedrock on top of the hills in the low mountain range Odenwald near to city of Heidelberg and on both sides of the Neckar valley. This region was heavily affected by windthrow in 1990. The natural forest vegetation is supposed to be Luzulo-Fagetum (beech forest with few sessile oak). But different previous forest stands and different silvicultural treatments lead to conditions more or less close to nature. The sample plots are not located in strict forest reserves, but show the variety of reforestationmeasures in managed forests. The ownership is diverse (public, municipal, church-owned, private). Private and public owners differ in preference for the forest species and silvicultural treatments due to their economical and ecological interests.
 

 

Researcher: Georg Ilgenfritz
Supervisor:Prof. Dr. A. Reif

 

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