Functional segregation of resource-use strategies of native and invasive plants across Mediterranean biome communities
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ORIGINAL PAPER
Functional segregation of resource-use strategies of native and invasive plants across Mediterranean biome communities Javier Gala´n Dı´az Montserrat Vila`
. Enrique G. de la Riva . Jennifer L. Funk .
Received: 24 May 2020 / Accepted: 19 September 2020 Springer Nature Switzerland AG 2020
Abstract Functional segregation among species in a community depends on their mean trait values (i.e. functional distinctiveness), and the range of trait attributes exhibited by each species (i.e. functional diversity). Previous evidence suggests that invasive plants tend to display traits related to a more acquisitive resource-use strategy than natives. However, the contribution of intraspecific trait variation to functional diversity has received little attention in community ecology, and might provide interesting Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10530-020-02368-5) contains supplementary material, which is available to authorized users. J. Gala´n Dı´az (&) M. Vila` Department of Integrative Ecology, Estacio´n Biolo´gica de Don˜ana (EBD-CSIC), 41092 Seville, Spain e-mail: [email protected]
information about community processes. In this study, we used eight plant traits related to carbon and nutrient acquisition of coexisting dominant native and invasive plants in eight communities across the Mediterraneanclimate biome to determine sources of functional segregation between native and invasive species. We found three major axes of functional variation, related to leaf economics, resource-use efficiency, and plant height. Invasive species across communities had leaf traits related to an acquisitive resource-use strategy in contrast to native species, whereas differences in the second and third axes were community dependent. Invasive species were more functionally diverse than native species across the dataset and in four out of the M. Vila` Department of Plant Biology and Ecology, University of Seville, 41012 Seville, Spain
E. G. de la Riva Department of Ecology, Brandenburg University of Technology, 03046 Cottbus, Germany J. L. Funk Schmid College of Science and Technology, Chapman University, Orange, CA 92866, USA J. L. Funk Department of Plant Sciences, University of California, Davis, CA 95616, USA
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eight communities. Intraspecific variance accounted for 11%–27% of total trait variation and was on average greater in invasive species, and especially important in the axis related to resource use efficiency. These results, although dependent on the trait and community considered, offer interesting insights to the sources of functional trait diversity of native and invasive species within communities, indicating that intraspecific variation might not be equally distributed between native and invasive species. Keywords Functional diversity Functional strategies Intraspecific variance Invasive plants Leaf economics spectrum Plant life form
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