The effects of climate warming and disturbance on the colonization potential of ornamental alien plant species

Abstract

(2017) 'The eects of climate warming and disturbance on the colonization potential of ornamental alien plant species.', Journal of ecology., 105 (6). pp. 1698-1708. Further information on publisher's website:https://doi.org/10.1111/1365-2745.12798 Publisher's copyright statement: This is the accepted version of the following article: Haeuser, E., Dawson, W. van Kleunen, M. (2017). The eects of climate warming and disturbance on the colonization potential of ornamental alien plant species. Journal of Ecology., which has been published in nal form at https://doi.org/10.1111/1365-2745.12798. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Accepted ArticleThis article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Accepted ArticleThis article is protected by copyright. All rights reserved.the current invasion potential of many alien ornamental species. However, with ongoing disturbance and climate change, this barrier may be reduced for some species. 2.Here we tested how colonization ability (a prerequisite for invasion) of frequently planted alien ornamentals depends on disturbance and heating, and on their species characteristics.We sowed seeds of 37 non-naturalized alien herbaceous garden-plant species into native grassland plots with and without disturbance, and with and without infrared heating lamps.To assess whether their responses differ from those within the regional wild flora, we also sowed 14 native species and 12 naturalized alien species. During two years, we assessed the likelihoods of germination, first-year survival, second-year survival and flowering of these 63 study species.3. The heating treatment, which also reduced soil moisture, decreased all measures of colonization success, but more so for sown native species than for the non-naturalized and naturalized alien ones. The disturbance treatment increased colonization success, and because heating decreased productivity of the undisturbed grassland plots, it also increased invasibility of these plots. Average colonization success of non-naturalized aliens was reduced by heating, but some species were not affected or performed even better with heating, particularly those with an annual life span and a high seed mass. Winter hardiness improved colonization ability of non-naturali...

European ornamental garden flora as an invasion debt under climate change

“…Growth form, vegetative propagation, propagation by seeds and hardiness were not significant in any model. Some of these species characteristics, however, have been found to affect naturalisation or invasion success in studies focussing on smaller regions (Haeuser, Dawson, & van Kleunen, ; Hanspach et al., ; Kolar & Lodge, ; Maurel et al., ). The absence of significance in our study might reflect potential correlations with factors retained in the model.…”

Functional trait differences and trait plasticity mediate biotic resistance to potential plant invaders

“…The 25 non-native species used were herbaceous ornamental plants, either annual or perennial, commonly cultivated in European gardens. They are all alien to Europe and not naturalized there, but often naturalized outside of Europe (Table 1; see Dullinger et al, 2017;Haeuser, Dawson, & van Kleunen, 2017 for details on species selection criteria). At the same time that the natives were sown in the pots, non-native ornamentals were sown F I G U R E 1 Trait shifts, biotic resistance and trait hierarchical position.…”

Increases and fluctuations in nutrient availability do not promote dominance of alien plants in synthetic communities of common natives

“…For example, a recent meta‐analysis showed that invasive alien plants take more advantage of CO 2 enrichment and climate warming than native species (Liu et al, ). On the other hand, many alien plant species that do not pose an invasion risk under current environmental conditions may become invasive under future conditions with ongoing global environmental change (Dullinger et al, ; Haeuser et al, ; Walther et al, ). Numerous empirical studies have tested how invasive plants interact with other environmental changes, but almost all of these studies considered only environmental changes in mean conditions (Leishman & Thomson, ; Liu et al, ; Jia et al, ; Manea & Leishman, ; but see Liu & van Kleunen, ; Parepa, Fischer, & Bossdorf, ).…”