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Flying insect biomass is negatively associated with urban cover in surrounding landscapes

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

DOI

  • Cecilie S. Svenningsen, Københavns Universitet
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  • Diana E. Bowler, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Friedrich Schiller University Jena, Helmholtz Centre for Environmental Research
    • ,
  • Susanne Hecker, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research
    • ,
  • Jesper Bladt
  • Volker Grescho, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research
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  • Nicole M. van Dam, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Friedrich Schiller University Jena
    • ,
  • Jens Dauber, Johann Heinrich von Thunen Institute
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  • David Eichenberg, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research
    • ,
  • Rasmus Ejrnæs
  • Camilla Fløjgaard
  • Mark Frenzel, Helmholtz Centre for Environmental Research
    • ,
  • Tobias G. Frøslev, Københavns Universitet
    • ,
  • Anders J. Hansen, Københavns Universitet
    • ,
  • Jacob Heilmann-Clausen, Københavns Universitet
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  • Yuanyuan Huang, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research
    • ,
  • Jonas C. Larsen, Københavns Universitet
    • ,
  • Juliana Menger, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research, National Institute of Amazonian Research
    • ,
  • Nur L.B.M. Nayan, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research
    • ,
  • Lene B. Pedersen, Københavns Universitet
    • ,
  • Anett Richter, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Helmholtz Centre for Environmental Research, Johann Heinrich von Thunen Institute
    • ,
  • Robert R. Dunn, Københavns Universitet, North Carolina State University
    • ,
  • Anders P. Tøttrup, Københavns Universitet
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  • Aletta Bonn, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Friedrich Schiller University Jena, Helmholtz Centre for Environmental Research

Aim: In this study, we assessed the importance of local- to landscape-scale effects of land cover and land use on flying insect biomass. Location: Denmark and parts of Germany. Methods: We used rooftop-mounted car nets in a citizen science project (“InsectMobile”) to allow for large-scale geographic sampling of flying insects. Volunteers sampled insects along 278 five-km routes in urban, farmland, grassland, wetland and forest landscapes in the summer of 2018. The bulk insect samples were dried overnight to obtain the sample biomass. We extracted proportional land use variables in buffers between 50 and 1,000 m along the routes and compiled them into land cover categories to examine the effect of each land cover, and specific land use types, on insect biomass. Results: We found a negative association between urban cover and flying insect biomass (1% increase in urban cover = 1% [95% CI: −3.0 to 0.0] decrease in biomass in Denmark, and a 3% [95% CI: −3.0 to 0.0] decrease in Germany) at a landscape scale (1,000-m buffer). In Denmark, we also found positive effects of semi-natural land cover types, that is protected grassland (largest at the landscape scale, 1000 m) and forests (largest at intermediate scales, 250 m). Protected grassland cover had a stronger positive effect on insect biomass than forest cover did. For farmland cover, the positive association with insect biomass was not clearly modified by any variable associated with farmland use intensity. The negative association between insect biomass and urban land cover appeared to be reduced by increased urban green space. Main conclusions: Our results show that land cover has an impact on flying insect biomass with the magnitude of this effect varying across spatial scales. However, the vast expanse of grey space in urbanized areas has a direct negative impact on flying insect biomass across all spatial scales examined.

OriginalsprogEngelsk
TidsskriftDiversity and Distributions
Vol/bind28
Nummer6
Sider (fra-til)1242-1254
Antal sider13
ISSN1366-9516
DOI
StatusUdgivet - jun. 2022

Bibliografisk note

Funding Information:
We express our sincere gratitude to all volunteers taking part in the insect monitoring program InsectMobile in both countries. We are very grateful to the local nature conservation authorities in Germany who provided sampling permissions in a very short time frame, and thus made the scoping study possible. Funding was provided by Aage V. Jensen Naturfond for the Danish project. The Danish Ministry of Higher Education and Science (7072‐00014B) also supported the project. The German Research Foundation (DFG FZT 118, 202548816) provided funding for the German InsektenMobil scoping study of the German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig.

Funding Information:
We express our sincere gratitude to all volunteers taking part in the insect monitoring program InsectMobile in both countries. We are very grateful to the local nature conservation authorities in Germany who provided sampling permissions in a very short time frame, and thus made the scoping study possible. Funding was provided by Aage V. Jensen Naturfond for the Danish project. The Danish Ministry of Higher Education and Science (7072-00014B) also supported the project. The German Research Foundation (DFG FZT 118, 202548816) provided funding for the German InsektenMobil scoping study of the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig.

Publisher Copyright:
© 2022 The Authors. Diversity and Distributions published by John Wiley & Sons Ltd.

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