3Urban woodland vegetation provides people with many aesthetic, ecological and psychological benefits, 4 but can also generate problems concerning people's perception of safety. This paper reviews existing 5 knowledge about perceived personal safety in relation to vegetation, particularly woodland vegetation, in 6 urban green spaces such as parks and residential areas. Individual and social factors, but also vegetation 7 character, maintenance and design, proved to be important for perceived personal safety. Vegetation- (Schroeder & Anderson, 1984;Burgess et al., 1988).
The first International Conference on Urban Tree Diversity hosted in June 2014 by the Swedish University of Agricultural Science in Alnarp, Sweden highlighted the need for a better understanding of the current state of urban tree diversity. Here we present and discuss a selection of urban tree diversity themes with the intention of developing and sharing knowledge in a research area that is gaining momentum. We begin by discussing the specific role of species diversity in ecosystem service provision and ecosystem stability. This is followed by exploring the urban conditions that affect
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