Study Maps Seven Mosquito Ecoclimatic Regions in Germany, Shows Climate-Driven Shifts in Vector Distribution
Researchers analyzing nearly 289,000 mosquito specimens collected across Germany from 2016 to 2025 identified seven distinct ecoclimatic regions with significantly different mosquito community compositions and habitat suitability. Lowland and coastal areas showed far greater mosquito diversity than alpine and mountainous zones, while invasive species like Aedes albopictus (tiger mosquito) were detected expanding into multiple regions. The findings provide a data-driven framework for targeted vector surveillance and early warning systems for climate-sensitive diseases like West Nile virus in central Europe.
A new preprint study published on bioRxiv used k-means cluster analysis of bioclimatic indicators to delineate seven mosquito ecoclimatic regions (MERs) across Germany, validated against a nationwide surveillance dataset of 288,689 specimens from 276 trap deployments spanning 2016–2025. The regions range from Alpine and Low Mountain zones — which showed the lowest species richness and diversity — to the Coastal Maritime region, which exhibited the highest Simpson diversity index (5.09) and species richness (24 species). Statistical analyses confirmed that mosquito community composition differed significantly between regions (PERMANOVA: P<0.05, F=6.50), and communities were more similar within regions than between them. The native Culex pipiens remained the dominant West Nile virus vector across all regions, but the invasive Asian tiger mosquito (Aedes albopictus) and the Japanese bush mosquito (Ochlerotatus japonicus) were recorded in several MERs, suggesting ongoing range expansion driven by warming temperatures and shifting precipitation. The authors argue that climate change is broadly increasing habitat suitability for mosquitoes across Germany, with regional variability that standard national-level assessments may miss. The ecoclimatic regionalization framework is intended to improve the precision of public health surveillance and arboviral disease risk modeling in central Europe.
What's missing
As a preprint, this study has not yet undergone formal peer review, and its findings should be interpreted with caution. The study does not quantify actual West Nile virus transmission rates or human case incidence across the identified regions, limiting direct inference about disease risk. Trap placement may not be fully representative of all habitat types within each ecoclimatic region, potentially introducing sampling bias.
What different sources said
- bioRxivCenter
Mosquito Ecoclimatic Regions Reveal Variability in Community Composition and Habitat Suitability of West Nile Virus Vectors (Diptera: Culicidae) in Germany under Climate Change
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