01 Fakultät Architektur und Stadtplanung
Permanent URI for this collectionhttps://elib.uni-stuttgart.de/handle/11682/2
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Item Open Access Urban foraging in Brazilian public greenspaces(2023) Guenat, Solène; Bailey-Athias, Jonas P.; Fischer, Leonie K.Urban foraging, i.e., the gathering of wild edible plants, plays a key role in nature connection within cities. Its integration in planning could contribute to the conservation of urban biodiversity. However, we have little understanding of the interactions between the motivations for and barriers to foraging, and the role of legislation, especially in biodiversity hotspots. Through an online questionnaire and policy review, we explored the practice of urban foraging in Recife, Brazil, across social, spatial and regulatory dimensions. We found that most non-foragers would forage if pollution risks were addressed and knowledge was improved. Foragers collected up to 31 species, none of which are threatened. By integrating the social, spatial and regulatory dimensions of the practice, we highlighted the importance of the local context for targeting foraging incentives. In all, regulation had little impact on where the practice is carried out, and foraging seemed to have little negative impact on biodiversity, as no threatened species were collected and foragers were conscious of their impact. This knowledge can contribute to better integrate the practice of foraging within legislation and develop forager-led greenspace planning and management. In biodiversity hotspots threatened by urban expansion, foraging can contribute to slowing down the biodiversity crisis and improve urban residents’ contact with biodiversity.Item Open Access Urban biodiversity in green walls : plant diversity and flower cover as drivers of pollinator abundance in vertical greening systems(2026) Fischer, Leonie K.; Bender, Eva; Guenat, Solène; Jakstis, Kristen; Krause, Pia; Wochner, Melina; Müller, HansUrban areas serve as important habitats for many taxa worldwide, with biodiversity potential often arising from the heterogeneous mosaic of greenspaces and the many different drivers that shape species assemblages. This also includes highly anthropogenic green infrastructure such as vertical greening systems that are gaining more attention as cities densify. Yet, their potential for different types of vegetation, including spontaneous species, and how this associates with the occurrences of different pollinator groups, remains largely unexplored. We therefore assessed (a) the vegetation, (b) diverse pollinator groups, and (c) their association on 24 pre-existing and newly established green wall systems in the metropolitan region of Stuttgart, Germany, over six sampling periods, including different seasons and years (N = 108). Our data demonstrates a high variety in the use of cultivated plant species and that spontaneous species, as well as species from near-natural planting design, can add variety to vegetation composition. Overall, we identified 200 plant species and mapped at least one pollinator group during each site visit, with a maximum of 75 individuals counted during a mapping in early summer. Based on the results of generalized linear models, we determine that certain pollinator groups associate with plant species richness (wild bees, bumble bees, hoverflies) and/or flower cover (bumble bees, honeybees, wasps). For some pollinator groups, the season or the greening system was also relevant. In conclusion, our study demonstrates that vertical greening can contribute to biodiversity support in dense cities if such strongly designed spaces consider specific environmental characteristics.