Vägkanter och sidoytor som habitat för pollinerande insekter: på vägen mot större biologisk mångfald i urbana miljöer
Sammanfattning: Biodiversity loss has been observed globally. Landscape change and fragmentation are the driving causes of this loss, and urbanisation one of the reasons. Pollinating insects are an important organism group as they contribute to the diversity of the wild flora as well as the global food production by performing the ecosystem service pollination. By taking measures to promote pollinating insects in urban environments, population densities can be increased both within the urban area but also in the surrounding landscape. The aim of this paper is to study how roadsides, a frequently re-occurring element in urban environments, can be used to provide habitats for pollinating insects. Bumblebees and solitary bees are the most important wild pollinators, followed by butterflies and hoverflies. This paper shows that sun exposure and a diversity of flowering plants throughout the growing season are crucial factors when creating habitats for these species. Adequate areas for nesting and hibernation are also important, which can involve for instance maintenance of areas with bare ground and placement of artificial nests near feeding resources. These factors should therefore be given priority when managing roadsides in urban environments. If roadsides are to be efficiently used as habitats by pollinating insects, it is important that measures are taken on multiple localities across the whole city. To achieve this, management of roadsides needs to be carried out in a way that conserves and promotes habitat suitable for pollinating insects.
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