500 Naturwissenschaften
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Wasser- und Ufervegetation
(2016)
Green roofs can mitigate negative environmental effects of urban densifcation to some extent, but they are often covered by species-poor Sedum mixtures with a low value for biodiversity. By combining a habitat template and a seedprovenance approach, we review the suitability of plant species from regionally occurring dry sandy grasslands (Koelerio-Corynophoretea) for extensive roof greening in northwestern Germany. Since 2015, we have studied the effects of species introduction on vegetation dynamics on experimental mini-roofs. Treatments included sowing seeds of regional native origin in two densities (1 g and 2 g/m2) and the transfer of raked material from an ancient dry grassland area classifed as Natura 2000 site. The applied raked material contained diaspores of 27 vascular plant species (including seven threatened species) and vegetative fragments of grasslandspecifc mosses and lichens. Since 2018, we have tested more species-rich seed mixtures in a large-scale experiment on a roof of 500 m2 with different engineered green-roof substrates and layering. In 2019, a green roof of 10,200 m2 was established in cooperation with a local enterprise to support regional native biodiversity.
In this chapter, we summarise the most important results of our studies and discuss how to support regional native biodiversity on green roofs.
Mobile Eye Tracking in Landscape Architecture: Discovering a New Application for Research on Site
(2018)
This chapter presents the process of establishing a laboratory for mobile eye tracking focussing
on real-world, open-space environments within the field of landscape architecture at
the Osnabrück University of Applied Sciences (D) as well as the latest results from the feasibility
study ‘Point de Vue’, which defines the basis for qualitative interaction analyses in
landscape architecture. Eye tracking is a tool that has been used extensively in the domains
of psychology, marketing, usability and user experience in remote and mobile applications,
but has rarely been used in real-world open spaces because of technical limitations. To
check the possibilities of mobile eye tracking as a new application in open spaces, several
exploratory tests and a feasibility study with long-term experiments have been carried out
in urban settings as well as in world famous parks such as ‘Grosser Garten’ in Hannover (D)
and ‘Stourhead’ in Wiltshire (GB). These experiments have shown extraordinary results that
enable us to use mobile eye tracking as a new tool in open space research to gain knowledge
about how people act, react and interact in open-space environments. Being able to see and
understand what catches one’s eye and the response to it will be a guide to better design.
PEF is an innovative technology to extend the shelf life of fresh liquid food products, mainly juices, with minor impact on the quality. Many lab scale studies have been published, indicating the great potential of PEF for the juice industry. For industrial realization, the PEF systems have been adapted to the industrial requirements, establishing HACCP and hygienic design concept. Important process parameters have been identified from research and integrated in industrial PEF processes. Juice producers are now able to use PEF for their production lines.