Aggressiva murödlor slår ut urgamla färgvarianter

26 april 2026

Rapporterad av AI

Forskare har upptäckt att aggressiva gröna murödlor, även kallade 'Hulk'-ödlor, snabbt konkurrerar ut och eliminerar gula och orangea färgvarianter som samexisterat i miljontals år. Murödlan, Podarcis muralis, uppvisar nu endast individer med vit strupe i många populationer kring Medelhavet. En studie där över 10 000 ödlor analyserats har avslöjat denna förändring i den evolutionära dynamiken.

I miljontals år upprätthöll populationer av murödlan (Podarcis muralis) en balans mellan tre olika strupfärger: vit, gul och orange. Varje variant representerade distinkta överlevnadsstrategier, såsom revirhävdande och attraktion av partners, vilket främjade samexistens i Medelhavsområdet. Tobias Uller, professor i evolutionär biologi vid Lunds universitet, konstaterar: 'Vi ser hur samexistensen av flera olika färgvarianter, något som varit stabilt i miljontals år, går förlorad under en mycket kort evolutionär tidsskala.'

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