The invasion of plant communities following extreme weather events under ambient and elevated temperature.

Details

Serval ID
serval:BIB_E8DB61DA2631
Type
Article: article from journal or magazin.
Collection
Publications
Title
The invasion of plant communities following extreme weather events under ambient and elevated temperature.
Journal
Plant Ecology
Author(s)
Sheppard C.S., Alexander J.M., Billeter R.
ISSN
1385-0237
Publication state
Published
Issued date
2012
Peer-reviewed
Oui
Volume
213
Number
8
Pages
1289-1301
Language
english
Abstract
Although the problem of plant invasions is expected to increase with climate change, there is as yet little experimental evidence, in particular, for the effects of extreme weather events. We established communities of European meadow species, which were subjected to warming and extreme event (drought and deluge) treatments in a factorial design at an experimental garden in Zurich, Switzerland. Phylogenetically matched pairs of native and alien species (Bromus erectus, B. inermis, Trifolium pratense, T. hybridum, Lactuca serriola, and Conyza canadensis) were introduced into the communities to test if invader performance is favored by warming and extreme events, and if alien invaders perform better than native colonizers. With a warming of on average 0.3 A degrees C, a higher cover of native plant communities was observed, while drought decreased cover in the short-term and lowered biomass. Germination, survival, and growth of the introduced species were lower under elevated temperature. Survival of all pairs and growth of Trifolium was greater in drought pots, while deluge had no effect. While the alien species showed a faster rate of increase in the number of leaves, mortality of alien species was greater than of native species. Overall, the performance of the focal species varied much more among taxonomic groups than native/alien provenances. The results suggest that with climate change, different types of extreme events will differ in the severity of their effects on native plant communities. Meanwhile, the effects of climate change on plant invasions are more likely to operate indirectly through the impacts on native vegetation.
Keywords
Invasive plants, Climate change, Warming, Drought, Flooding, Alien-native congeners
Web of science
Create date
01/09/2016 12:26
Last modification date
20/08/2019 16:11
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