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You are here: Home / Data and maps / Maps and graphs / Actual and potential future alien plant invasion hotspots under two emissions scenarios

Actual and potential future alien plant invasion hotspots under two emissions scenarios

The map shows the potential future alien plant invasion hotspots in Austria and Germany under climate change, based on 30 invasive alien vascular plant species and the SRES A2 and B2 emissions scenarios. Colours mark number of invasive alien species suitable in an area.

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Potential future alien plant invasion hotspots in Germany and Austria under climate change, based on 30 invasive alien vascular plant species. Colours mark number of invasive alien species suitable in an area.

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Climate change might drive the invasive tree Robinia pseudacacia into nature reserves and endangered habitats Climate change might drive the invasive tree Robinia pseudacacia into nature reserves and endangered habitats Static networks of nature reserves disregard the dynamics of species ranges in changing environments. In fact, climate warming has been shown to potentially drive endangered species out of reserves . Less attention has been paid to the related problem that a warmer climate may also foster the invasion of alien species into reserve networks. Here, we use niche-based predictive modelling to assess to which extent the Austrian Natura 2000 network and a number of habitat types of conservation value outside this network might be prone to climate warming driven changes in invasion risk by Robinia pseudacacia L., one of the most problematic alien plants in Europe. Results suggest that the area potentially invaded by R. pseudacacia will increase considerably under a warmer climate . Interestingly, invasion risk will grow at a higher than average rate for most of the studied habitat types but less than the national average in Natura 2000 sites. This result points to a potential bias in legal protection towards high mountain areas which largely will remain too cold for R. pseudacacia . In contrast, the selected habitat types are more frequent in montane or lower lying regions, where R. pseudacacia invasion risk will increase most pronouncedly. We conclude that management plans of nature reserves should incorporate global warming driven changes in invasion risk in a more explicit manner. In case of R. pseudacacia , reducing propagule pressure by avoiding purposeful plantation in the neighbourhood of reserves and endangered habitats is a simple but crucial measure to prevent further invasion under a warmer climate .

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