Browsing by Author "Janoyan, Grigor"

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    Geographic mosaics of plant-soil microbe interactions in a global plant invasion
    (2012) Andonian, Krikor; Hierro, José L.; Khetsuriani, Liana; Becerra Osses, Pablo Ignacio; Janoyan, Grigor; Villarreal, Diego; Cavieres, Lohengrin A.; Fox, Laurel R.; Callaway, Ragan M.
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    Range-Expanding Populations of a Globally Introduced Weed Experience Negative Plant-Soil Feedbacks
    (PUBLIC LIBRARY SCIENCE, 2011) Andonian, Krikor; Hierro, Jose L.; Khetsuriani, Liana; Becerra, Pablo; Janoyan, Grigor; Villarreal, Diego; Cavieres, Lohengrin; Fox, Laurel R.; Callaway, Ragan M.
    Background: Biological invasions are fundamentally biogeographic processes that occur over large spatial scales. Interactions with soil microbes can have strong impacts on plant invasions, but how these interactions vary among areas where introduced species are highly invasive vs. naturalized is still unknown. In this study, we examined biogeographic variation in plant-soil microbe interactions of a globally invasive weed, Centaurea solstitialis (yellow starthistle). We addressed the following questions (1) Is Centaurea released from natural enemy pressure from soil microbes in introduced regions? and (2) Is variation in plant-soil feedbacks associated with variation in Centaurea's invasive success?