Aktuelle Situation sowie mittel- und langfristige Perspektive der Douglasie (Pseudotsuga menziesii) im Landeswald von Thüringen

Alfeld

2015

S. 99-101

Artikel aus einer ZeitschriftUnselbständiges Werk

200192056

Despite long discussions about Douglas fir in Germany and efforts to increase its share by forest management during the last 20 years, Douglas fir is still one of the rare tree species in the Thuringian State forests with a share of less than 0.5%. This share will slightly increase to 1% until 2040 based on a forest conversion programme that focuses on sustainable close to nature forest management recently introduced. In a long-term perspective, a share of 5% should be achieved. However, the theoretical potential for Douglas fir derived from current soil and climate specific tree species recommendations is about 30% (if all other alternative tree species recommendations are excluded). In the short and medium term, potential of regeneration in forest stands of age class VI+ could lead to an increase up to 6.3%. But, one third of this share would be located in forest conservation areas and Natura 2000 sites, where a rather moderate increase of the share of Douglas fir will be tolerated for ecological reasons. However, hitherto there are no requirements for a careful, function-oriented selection of suitable alternative tree species. Moreover, management of Douglas fir in Thuringia needs supportive landscape planning guidelines taking different objectives of forest management and nature conservation into account, e. g. zoning for conservation and development in protected areas.