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2006
- handle: 10670/1.zmhuj4
- 0378-1844
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Interciencia
Mots-clés
Multidisciplinarias (Ciencias Sociales) Invasion Inbreeding Adaptive Mutation Epigenetic ChangeSujets proches
Invaders (Organisms) Foreign species (Introduced organisms) Invasive alien species Translocated organisms Foreign organisms (Introduced organisms) Naturalised organisms Alien species Non-indigenous organisms Non-native species Nonindigenous species Non-native organisms Nonnative species Naturalized organisms Introduced species Translocated species Invasive species Exotic organisms Nonindigenous organisms Invasive organisms Nonnative organisms Alien organisms Exotic species Non-indigenous speciesCiter ce document
Jorge Barrios et al., « The inbreeding paradox in invasive species », Interciencia, ID : 10670/1.zmhuj4
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Résumé
"One of the most relevant topics in the biology of invasionconcerns an inbreeding paradox: how do exotic species that usuallyinvade new territories in small numbers, thus suffering theeffects of inbreeding, become successful invaders. To explain thisparadox, it has been argued that high migration rates and repeatedintroductions of exotic species take place so as to overcomelow genetic diversity and inbreeding. However, severalsingle episodes of exotic species introduction have occurred thatcannot be explained by this hypothesis. An attempt is made tosolve this paradox by considering that invaders are not only ableto modify the new environment, but also suffer modificationsunder the influence of the new environment. The possible role ofepigenetic adaptations and adaptive mutations is postulated inorder to explain the successful adaptation of invaders in theirnew environment."