Distinct invasion strategies operating within a natural annual plant system

Ecology Letters
Hao Ran LaiJohn M Dwyer

Abstract

Alien plant species are known to have a wide range of impacts on recipient communities, from resident species' exclusions to coexistence with resident species. It remains unclear; however, if this variety of impacts is due to different invader strategies, features of recipient communities or both. To test this, we examined multiple plant invasions of a single ecosystem in southwestern Australia. We used extensive community data to calculate pairwise segregation between target alien species and many co-occurring species. We related segregation to species' positions along community trait hierarchies and identified at least two distinct invasion strategies: 'exploiters' which occupy high positions along key trait hierarchies and reduce local native species diversity (particularly in nutrient-enriched situations), and 'coexisters' who occupy intermediate trait positions and have no discernable impact on native diversity. We conclude that trait hierarchies, linked to measures of competition, can provide valuable insights about the processes driving different invasion outcomes.

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Citations

Apr 27, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Habacuc Flores-MorenoElizabeth T Borer
Feb 7, 2018·Nature Ecology & Evolution·Ayesha I T TullochDavid B Lindenmayer
Aug 15, 2020·Health Expectations : an International Journal of Public Participation in Health Care and Health Policy·Lucinda KenihanNicole M Phillips
Feb 18, 2020·Global Ecology and Biogeography : a Journal of Macroecology·Masha T van der SandeTiffany M Knight
Nov 24, 2016·Ecology and Evolution·Maitane Iturrate-GarciaGabriela Schaepman-Strub
Jul 12, 2017·Ecology and Evolution·Dilli P RijalInger G Alsos
Oct 29, 2020·Anais Da Academia Brasileira De Ciências·Janaina G LarsenPedro Higuchi
Feb 28, 2021·Ecology·Estibaliz PalmaJane A Catford

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