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Deutschland besitzt mit einer geschätzten Zahl von über 2,5 Millionen Vegetationsaufnahmen den weltweiten größten Schatz dieser wertvollen Biodiversitätsinformationen. Leider bleiben Sichtbarkeit und Zugänglichkeit dieses Erbes weit hinter den technischen Möglichkeiten und internationalen Standards zurück. Modernisierung und Ausbau der nationalen Vegetationsdatenbank vegetweb sind eine vordringliche Aufgabe, die im Rahmen eines Verbundprojektes in Angriff genommen wird. Unter http://www.vegetweb.de findet sich der Prototyp der Plattform für Vegetationsdaten, die bis Ende 2016 seine volle Funktionsfähigkeit erhalten soll.
Wir rufen alle Kolleginnen und Kollegen dazu auf, aktiv an der nationalen Vegetationsdatenbank für Deutschland mitzuarbeiten, indem sie ihre eigenen Daten zur Verfügung stellen oder sich darum bemühen, ihnen bekannte Datenbesitzer in ihrem Umfeld von einer Mitarbeit zu überzeugen.
In our contribution, we report on the 6th European Dry Grassland Meeting held from 31 August to 1 September 2009 in Halle (Saale), Germany. The meeting was attended by 40 participants, who gave 15 oral and 17 poster presentations. The rapid positive development of the European Dry Grassland Group (EDGG), the organiser of this conference, is mentioned: the inclusion of the EDGG in the International Association for Vegetation Science (IAVS) as a working group, the establishment of two new subgroups focussing on Mediterranean and South-East European dry grasslands, respectively, and the organisation of the first EDGG research expedition in 2010 belong to the most important events. In the last part of our contribution, we give a short introduction to the six articles of this Special Feature. Two of them deal with phytosociological classification of semi-natural grassland communities, one with vegetation- environment relationships. Two papers are concerned with conservational topics, one focussing on the population structure of endangered Pulsatilla patens, the other dealing with conservation of xeric grasslands in Transylvania. The last paper examines temporal changes in calcareous grasslands with regard to species diversity.
We first report from the 5th Dry Grassland Meeting held from 28th to 30st of August 2008 in Kiel, Germany. Then we take stock of the achievements of the German Arbeitsgruppe Trockenrasen and the international Working Group on Dry Grasslands in the Nordic and Baltic Region towards establishment of vegetation databases of dry grasslands in these study regions. At the conference, the European Dry Grassland Group (EDGG) was founded as an international platform of dry grassland researchers and conservationists. As networking tools it provides a homepage on the internet, publishes a quarterly electronical bulletin, and will organise the future European Dry Grassland Meetings. In the last part of this contribution, we give a short introduction to the five articles of this Special Feature. Four of them make a major contribution to supra-national classification of Koelerio-Corynephoretea and Festuco- Brometea communities, respectively, by providing syntaxonomic overviews based on comprehensive data from eastern European countries for which only few data have been available until now. The other major focus of the Feature papers is on degradation and restoration of various types of dry grasslands.