Soil origin corresponds with variation in growth of an invasive Centaurea, but not of non-invasive congeners

Montesinos, Daniel, and Callaway, Ragan M. (2020) Soil origin corresponds with variation in growth of an invasive Centaurea, but not of non-invasive congeners. Ecology, 101 (10). e03141.

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Why only a small proportion of exotic species become invasive is an unresolved question. Escape from the negative effects of soil biota in the native range can be important for the success of many invasives, but comparative effects of soil biota on less successful exotic species are poorly understood. Studies of other mechanisms suggest that such comparisons might be fruitful. Seeds of three closely related Centaurea species with overlapping distributions in both their native range of Spain and their nonnative range of California were grown to maturity in pots to obtain an F1 generation of full sibling seeds with reduced maternal effects. Full sibling F1 seeds from both ranges were subsequently grown in pots with inoculations of soil from either the native or nonnative ranges in a fully orthogonal factorial design. We then compared plant biomass among species, regions, and soil sources. Our results indicate that escape from soil pathogens may unleash the highly invasive Centaurea solstitialis, which was suppressed by native Spanish soils but not by soils from California. In contrast, the two noninvasive Centaurea species grew the same on all soils. These results add unprecedented phylogenetically controlled insight into why some species invade and others do not.

Item ID: 64155
Item Type: Article (Research - C1)
ISSN: 1939-9170
Keywords: biogeography; Centaurea solstitialis; enemy release; exotic species; plant–soil feedback; reciprocal transplant
Copyright Information: © 2020 by the Ecological Society of America. This article is freely available via the publisher's website.
Funders: Fundação para a Ciência e a Tecnologia, Portugal (FCT), Office of Experimental Program to Stimulate Competitive Research (OEPSCR)
Projects and Grants: FCT Grant Number: IF‐00066‐2013, FCT Grant Number: PLA/0763/2014, OEPSCR Grant Number: OIA‐1757351
Date Deposited: 26 Aug 2020 02:33
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management @ 25%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310499 Evolutionary biology not elsewhere classified @ 25%
41 ENVIRONMENTAL SCIENCES > 4102 Ecological applications > 410202 Biosecurity science and invasive species ecology @ 50%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960599 Ecosystem Assessment and Management not elsewhere classified @ 50%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960899 Flora, Fauna and Biodiversity of Environments not elsewhere classified @ 50%
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