EXAMPLE OF THE PROCESS OF EXPANSION OF A SUPERCOLONY

The graphic shows the expansion process of one colony (Seva, Spain). The exact date of infestation in this population is unknown but aprox. 1985 is the first year in which nuisances at home were first noted. The expansion rate looks constant but this is an effect of too few data points available (1999: starting date). Colour indicates the area infested.

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