this post was submitted on 13 Jul 2023
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While climate change definitely has an influence, the main culprit is trade globalisation.
For example the climate of the native region of the Asian bush mosquito (Aedes japonicus) is very similar to the climate in central europe. This species was introduced to Europe around the 2000, presumably by used tire trading, and spread rapidly the following years, because the climate was so similar.
Other species like the Asian tiger mosquito (Aedes albopictus) do profit more from rising temperatures, but there are also studies showing that after a few generation cycles in Europe, the eggs became more frost resistant. The main driver for introduction and spread was still global trade.