European variations in the temporal trend of bird and butterfly community temperature index

Figure Created 11 Oct 2012 Published 20 Nov 2012 Last modified 17 Nov 2017
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The map shows the temporal trend of bird and butterfly CTI for each country. A temporal increase in CTI directly reflects that the species assemblage of the site is increasingly composed of individuals belonging to species dependent on higher temperature. The height of a given arrow is proportional to the temporal trend and its direction corresponds to the sign of the slope (from south to north for positive slopes). The arrow is opaque if the trend is significant.



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Arrows are proportional to the annual change in community composition as a response to climate change.

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