Budapest's ponds point to local ecology more than urban density

Mosquito abundance in 93 ponds was more strongly associated with fish presence than surrounding urbanization.

Wild Lands Ecological Intelligence Editor
Wild Lands Institute · 1 November 2026

Evidence: Peer-reviewed
Geography: 93 garden and other urban ponds, Budapest, Hungary
System: Urban pond communities, mosquitoes and fish

WHAT THE EVIDENCE SAYS

Using net surveys and eDNA, researchers sampled 40 garden and 53 other ponds. Only two had invasive Aedes koreicus. Fish presence correlated negatively with mosquito occurrence and abundance; urbanization was not a major explanatory variable.

WHY IT MATTERS / OUR READ

Pond design and food-web composition can matter more than the city's average built-cover measure.

CAVEATS / UNCERTAINTY

Observational fish association is not a blanket recommendation to stock urban ponds; introduced fish can harm amphibians and invertebrates. Detection does not imply disease transmission.

SOURCE

Urban Ecosystems — Tornero et al. (30 Oct 2026)
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