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

Haeuser, Emily Sutton; Dawson, Wayne; van Kleunen, Mark

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

Dateien

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Datum

2017

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Ecology. 2017, 105(6), pp. 1698-1708. ISSN 0022-0477. eISSN 1365-2745. Available under: doi: 10.1111/1365-2745.12798

Zusammenfassung

A large number of alien plant species have been introduced as ornamental garden plants to Europe, but relatively few have become invasive. Low climatic suitability may be limiting 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 2 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-naturalized aliens, but this advantage was reduced in the heated plots.
4. Synthesis. Disturbance increased and heating decreased the absolute colonization success of most of the 63 species sown. However, heating had stronger adverse effects on the resident grassland and sown native species than either type of sown alien species. Together, these results suggest that some alien plants may have greater colonization success relative to native plants under a warmer climate.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

biological invasions, climate change, climate warming, exotic species, functional traits, garden plants, invasion debt, invasion ecology, plant colonization, vegetation disturbance

Zitieren

ISO 690

HAEUSER, Emily Sutton, Wayne DAWSON, Mark VAN KLEUNEN, 2017. The effects of climate warming and disturbance on the colonization potential of ornamental alien plant species. In: Journal of Ecology. 2017, 105(6), pp. 1698-1708. ISSN 0022-0477. eISSN 1365-2745. Available under: doi: 10.1111/1365-2745.12798

BibTex

@article{Haeuser2017-11effec-39093,
  year={2017},
  doi={10.1111/1365-2745.12798},
  title={The effects of climate warming and disturbance on the colonization potential of ornamental alien plant species},
  number={6},
  volume={105},
  issn={0022-0477},
  journal={Journal of Ecology},
  pages={1698--1708},
  author={Haeuser, Emily Sutton and Dawson, Wayne and van Kleunen, Mark}
}

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