Biological invasion and biological control select for different life histories

Tayeh Ashraf, Hufbauer Ruth A., Estoup Arnaud, Ravigné Virginie, Frachon Léa, Facon Benoît. 2015. Biological invasion and biological control select for different life histories. Nature Communications, 6 (7268), 5 p.

https://doi.org/10.1038/ncomms8268

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Biological invaders have long been hypothesized to exhibit the fast end of the life-history spectrum, with early reproduction and a short lifespan. Here, we examine the rapid evolution of life history within the harlequin ladybird Harmonia axyridis. The species, once used as a biological control agent, is now a worldwide invader. We show that biocontrol populations have evolved a classic fast life history during their maintenance in laboratories. Invasive populations also reproduce earlier than native populations, but later than biocontrol ones. Invaders allocate more resources to reproduction than native and biocontrol individuals, and their reproduction is spread over a longer lifespan. This life history is best described as a bet-hedging strategy. We assert that invasiveness cannot be explained only by invoking faster life histories. Instead, the evolution of life history within invasive populations can progress rapidly and converge to a fine-tuned evolutionary match between the invaded environment and the invader.

Mots-clés Agrovoc : espèce envahissante, lutte biologique, agent de lutte biologique, évolution, dynamique des populations, Harmonia axyridis, génétique des populations, écologie animale

Mots-clés géographiques Agrovoc : Chine, Kazakhstan

Classification Agris : H10 - Ravageurs des plantes
H20 - Maladies des plantes
L20 - Écologie animale

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

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