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Urban development reduces bee abundance and diversity

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Abstract

Wild bee communities persist in cities despite major disruption of nesting and food resources by urban development. Bee diversity and abundance is key for urban agriculture and maintenance of plant diversity, and assessing what aspects of cities enhance bee populations will promote our capacity to retain and provision bee habitat. Here, we assessed how variation in land cover and neighborhood development history affected bee communities in the midwestern US urban landscape of Madison, Wisconsin. We sampled bee communities across 38 stratified sites with relatively high (>55%) or low (<30%) levels of impervious surface, and assessed effects of land use and neighborhood development history on bee abundance and species richness. We show abundance and richness of soil nesting bees was lower in newer neighborhoods. Soil nesting bees and bee community richness decreased as cover of impervious surface increased, but above ground nesting bees were minimally impacted. Bee community similarity varied spatially and based on dissimilar local land cover, only for soil nesting bees, and the overall bee community. Impervious surface limited bee abundance and diversity, but new neighborhoods were associated with greater negative effects. We suggest that enhancing the structural diversity of new neighborhoods in urban ecosystems may imitate the structural benefits of older neighborhoods for bee populations.

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Availability of data and material

Bees are submitted to the University of Wisconsin-Madison insect museum.

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https://github.com/verawp.

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Funding

Department of Entomology, University of Wisconsin-Madison.

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Authors

Contributions

VWP designed study, performed analysis and drafted manuscript, JSB and DWC participated in manuscript review. All authors gave final approval for publication.

Corresponding author

Correspondence to Vera Pfeiffer.

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The authors declare they have no conflict of interest.

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Supplementary file1 (DOCX 18 KB)

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Pfeiffer, V., Crowder, D.W. & Silbernagel, J. Urban development reduces bee abundance and diversity. Urban Ecosyst 26, 1535–1544 (2023). https://doi.org/10.1007/s11252-023-01393-1

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  • DOI: https://doi.org/10.1007/s11252-023-01393-1

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