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Biological Invasion Theories: Merging Perspectives from Population, Community and Ecosystem Scales

Olivier Chabrerie 1, * François Massol 2 Benoit Facon 3 Romain Thevenoux 4, 5 Manon Hess 6, 7, 8 Romain Ulmer 1 Jelena H. Pantel 9 Julie Braschi 6, 10 Laurent Amsellem 11 Sylvie Baltora-Rosset 1 Aurélie Tasiemski 2 Frédéric Grandjean 12 Patricia Gibert 13 Matthieu Chauvat 14 Laurence Affre 6 Gabrielle Thiébaut 15 Frédérique Viard 16 Estelle Forey 14 Laurent Folcher 4 Thomas Boivin 17 Elise Buisson 6 David M. Richardson 18 D Renault 15, 19
Abstract : Biological invasions have reached an unprecedented level and the number of introduced species is still increasing worldwide. Despite major advances in invasion science, the determinants of success of introduced species, the magnitude and dimensions of their impact, and the mechanisms sustaining successful invasions are still debated. Empirical studies show divergent impacts of nonnative populations on ecosystems and contrasting effects of biotic and abiotic factors on the dynamics of non-native populations; this is hindering the emergence of a unified theory of biological invasions. We propose a synthesis that merges perspectives from population, community, and ecosystem levels. Along a timeline of ecosystem transformation driven by nonnative species, from historical to human-modified ecosystems, we order invasion concepts and theories to clarify their chaining and relevance during each step of the invasion process. This temporal sorting of invasion concepts shows that each concept is relevant at a specific stage of the invasion. Concepts and empirical findings on non-native species may appear contradictory. However, we suggest that, when mapped onto an invasion timeline, they may be combined in a complementary way. An overall scheme is proposed to summarise the theoretical dynamics of ecosystems subjected to invasions. For any given case study, this framework provides a guide through the maze of theories and should help choose the appropriate concepts according to the stage of invasion.
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Olivier Chabrerie, François Massol, Benoit Facon, Romain Thevenoux, Manon Hess, et al.. Biological Invasion Theories: Merging Perspectives from Population, Community and Ecosystem Scales. In press. ⟨hal-02345539⟩



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