Summary: Climate change favours introduction of new plant species
One of the observed ecological responses to recent climate change are geographical range shifts of plants and animals. Indigenous species may expand their ranges into neighbouring areas. However, also introduced species may naturalise and expand their range.
In the last 30 years an increasing number of exotic species originating from warmer regions have been recorded to spread in Central Europe, apparently profiting from increasing temperatures. Human transports alllow the spread of species over long distances, both, on purpose (e.g. ornamentals) and accidentally.
The invasion of cold-sensitive non-indigenous species may particularly be facilitated by climate change. A benign climate no longer limits survival and reproduction by harsh winter conditions to the same extent as decades ago.