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Rapid growth and defence evolution following multiple introductions

View ORCID ProfileLotte A. van Boheemen, Sarah Bou-Assi, View ORCID ProfileAkane Uesugi, Kathryn A. Hodgins
doi: https://doi.org/10.1101/435271
Lotte A. van Boheemen
1School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia
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  • For correspondence: la.vanboheemen@gmail.com
Sarah Bou-Assi
1School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia
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Akane Uesugi
1School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia
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Kathryn A. Hodgins
1School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia
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Abstract

  1. Rapid adaptation can aid invasive populations in their competitive success. Resource-allocation trade-off hypotheses predict higher resource availability or the lack of natural enemies in introduced ranges allow for increased growth and reproduction, thus contributing to invasive success. Evidence for such hypotheses are however equivocal and tests among multiple ranges over productivity gradients are required to provide a better understanding of the general applicability of these theories.

  2. Using common gardens, we investigated the adaptive divergence of various constitutive and inducible defence-related traits between the native North American and introduced European and Australian ranges, whilst controlling for divergence due to latitudinal trait clines, individual resource budgets and population differentiation, using >11,000 SNPs.

  3. Rapid, repeated clinal adaptation in defence-related traits was apparent despite distinct demographic histories. We also identified divergence among ranges in some defence-related traits, although differences in energy budgets among ranges may explain some, but not all, defence-related trait divergence. We do not identify a general reduction in defence in concert with an increase in growth among the multiple introduced ranges as predicted trade-off hypotheses.

  4. Synthesis: The rapid spread of invasive species is affected by a multitude of factors, likely including adaptation to climate and escape from natural enemies. Unravelling the mechanisms underlying invasives’ success enhances understanding of eco-evolutionary theory and is essential to inform management strategies in the face of ongoing climate change.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted April 23, 2019.
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Rapid growth and defence evolution following multiple introductions
Lotte A. van Boheemen, Sarah Bou-Assi, Akane Uesugi, Kathryn A. Hodgins
bioRxiv 435271; doi: https://doi.org/10.1101/435271
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Rapid growth and defence evolution following multiple introductions
Lotte A. van Boheemen, Sarah Bou-Assi, Akane Uesugi, Kathryn A. Hodgins
bioRxiv 435271; doi: https://doi.org/10.1101/435271

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