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  5. Restoring biodiversity in semi-natural landscapes (ecosystem and population level) 
Theme organiser: 
Gert Rosenthal (University of Stuttgart, Germany)
Theme description: 
Session 5A: Restoration of biodiversity after land use abandonment:
Less favoured areas in Europe experienced a strong retreat of agricultural activities since the 1960s which affected especially extensively used and unproductive semi-natural ecosystems with a remarkable biodiversity. Abandonment of traditional land use came along with changed disturbance and habitat conditions which often triggered successions towards undesired species-poor ecosystems.
The session searches for answers on the question is to what extent biodiversity can be restored on these abandoned sites. Is it possible to re-establish the conditions for restoration succession? Can seeds of desired plant species be re-activated from soil seed banks? Or do plant and animal species have to re-colonise the sites from remote remnant populations?

Session organiser/chair:  Gerd Rosenthal (University of Stuttgart, Germany)
Session 5B: Large- scale grazing: a tool of landscape and ecosystem restoration?
Mini-Symposium
Traditional pastoral landscapes provide a high biodiversity in terms of habitat, structure, ecosystem and species diversity from the landscape to the micro scale. Important reasons are that large herbivores, if they are allowed to freely select their fodder resources on large areas, produce disturbances of different spatial and temporal dimensions. This triggers population and ecosystem dynamics. Additionally evidence arises that large herbivores are important dispersal vectors for seeds and animals. The approach to use such important controlling factors for restoring ecosystems and landscapes that lost their biodiversity has been applied in many landscapes throughout Europe such as marshlands, mires, river valleys, forests, heath and dry grassland ecosystems. What are the lessons learned from these projects in terms of restoration success?

Session organiser/chair: Gert Rosenthal (University of Stuttgart, Germany), Bettina Burkart (University of Freiburg, Germany), Mirijam Gaertner (University of Freiburg, Germany), Angelika Schwabe-Kratochwil (Darmstadt University of Technology, Germany)

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