What the study found: Climate warming and aridification were consistently linked to butterfly population declines in both rural and urban settings. The study also found that the urban or rural context strongly shaped how species responded to warming, and that urbanisation generally amplified the negative effects of climate change on butterfly population trends.
Why the authors say this matters: The authors conclude that butterfly population change is shaped by a complex interplay of climate change, urban context, and species traits. They 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 populations of 145 butterfly species across 869 sites in 12 European countries from 1976 to 2021. They modelled population trends against temperature, precipitation, aridity, built-up surface, urban versus rural context, and species traits including trophic specialisation, body size, reproductive rate, and thermal adaptation.
What worked and what didn't: Warming and increasing aridity were associated with declines across both urban and rural populations, while precipitation effects differed by location and species. Urbanisation by itself did not predict trends, but urban-rural context changed the strength of responses to warming; species with colder thermal niches and lower reproductive rates were most vulnerable, and 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 describe specific limitations. The findings are based on European butterfly populations across the sites, time period, and species included in the study.
Key points
- Climate warming and aridification were linked to butterfly declines in both urban and rural areas.
- Urbanisation alone did not predict population trends, but it changed how strongly species responded to warming.
- Butterflies with colder thermal niches and lower reproductive rates were most vulnerable to warming.
- Under aridification, trophic specialists declined more in urban areas, while generalists declined more in rural sites.
- The study analysed more than 8,400 populations of 145 butterfly species across 869 European sites.
Disclosure
- Research title:
- Climate warming and aridification were linked to butterfly declines
- 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:
- Institut de Biologia Evolutiva, Department of Public Health, University of Turin, Centre National de la Recherche Scientifique, Structure et Instabilité des Génomes, Finnish Environment Institute, Radboud University Nijmegen, Research Institute for Nature and Forest, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Luxembourg Institute of Science and Technology, Universidad Autónoma de Madrid, Helmholtz Centre for Environmental Research, Lund University, University of Exeter, UK Centre for Ecology & Hydrology, Universität Innsbruck, Croatian Natural History Museum, Hospital General de Granollers, Centre for Research on Ecology and Forestry Applications, German Centre for Integrative Biodiversity Research, Czech Society for Butterfly and Moth Conservation, Dutch Butterfly Conservation
- Publication date:
- 2026-02-01
- OpenAlex record:
- View
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