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Urbanisation amplifies climate-driven butterfly declines in Europe

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A red and brown butterfly rests on a yellow wildflower in a meadow filled with blooming yellow and purple wildflowers and green grass.
Research area:EcologyEcological ModelingSpecies Distribution and Climate Change

What the study found

The study found that climate warming and aridification were consistently linked to butterfly population declines across both rural and urban settings. It also found that urbanisation alone did not predict trends, but the urban or rural context strongly changed how species responded to warming.

Why the authors say this matters

The authors conclude that their findings highlight a complex interplay between climate change, urban context, and species traits in shaping population dynamics. They also suggest that urbanisation generally amplifies the negative impact of climate change on insect population trends.

What the researchers tested

The researchers analysed long-term monitoring data from more than 8,400 butterfly populations of 145 species across 869 sites in 12 European countries from 1976 to 2021. They modelled population trends in relation to climate variables, including temperature, precipitation, and aridity, as well as urbanisation, urban versus rural context, and species traits such as trophic specialisation, body size, reproductive rate, and thermal adaptation.

What worked and what didn't

Warming and aridification were associated with declines in both rural and urban populations, while precipitation effects varied by place and species. The stronger impact of warming in urban populations was linked by the authors to higher baseline temperatures and lower habitat suitability and connectivity in cities. Cold-niche species and species with lower reproductive rates were most vulnerable to warming; under aridification, trophic specialists declined more in urban areas, while generalists declined more in rural sites.

What to keep in mind

The abstract does not report specific limitations beyond the study's observational scope and broad continental comparison. The results are based on European butterfly monitoring data across six bioclimatic zones, so the findings are limited to the species, regions, and time period studied.

Key points

  • Climate warming and aridification were consistently linked to butterfly population declines.
  • Urbanisation alone did not predict population trends.
  • Urban versus rural context changed how butterflies responded to warming.
  • Cold-niche species and species with lower reproductive rates were most vulnerable to warming.
  • Under aridification, trophic specialists declined more in urban areas, while generalists declined more in rural sites.

Disclosure

Research title:
Urbanisation amplifies climate-driven butterfly declines in Europe
Authors:
Pau Colom, Ashley Tejeda, Simona Bonelli, Benoît Fontaine, Mikko Kuussaari, Dirk Maes, Xavier Mestdagh, Miguel L. Munguira, Martin Musche, Lars B. Pettersson, David Roy, Johannes Rüdisser, Martina Šašić, Reto Schmucki, Constanti Stefanescu, Nicolas Titeux, Josef Settele, Chris van Swaay, Javier Gordillo, Yolanda Melero
Institutions:
Centre for Research on Ecology and Forestry Applications, Centre for Research on Ecology and Forestry Applications, Centre for Research on Ecology and Forestry Applications, Centre National de la Recherche Scientifique, Croatian Natural History Museum, Czech Society for Butterfly and Moth Conservation, Department of Public Health, Dutch Butterfly Conservation, Finnish Environment Institute, German Centre for Integrative Biodiversity Research, Helmholtz Centre for Environmental Research, Helmholtz Centre for Environmental Research, Hospital General de Granollers, Institut de Biologia Evolutiva, Institut de Biologia Evolutiva, Institut de Biologia Evolutiva, Lund University, Luxembourg Institute of Science and Technology, Luxembourg Institute of Science and Technology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Radboud University Nijmegen, Research Institute for Nature and Forest, Structure et Instabilité des Génomes, UK Centre for Ecology & Hydrology, UK Centre for Ecology & Hydrology, Universidad Autónoma de Madrid, Universität Innsbruck, University of Exeter, University of Turin
Publication date:
2026-02-01
DOI:
10.1111/geb.70204
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.