Invasive beetle species (Coleoptera) associated with compost heaps in the Nordic countries

Extensive changes in the species composition of beetles in compost heaps have taken place in the Nordic countries during the 20th century. In this period, a total of 34 alien beetle species have established populations in at least two of the countries (Norway, Sweden, Denmark, and Finland). A short review of each species' immigration history is given. The possible methods for dispersal of the species, the reasons for their successful establishment in the Nordic countries and possible effects of native species are discussed. The following seven rove beetle species (Coleoptera, Staphylinidae) are reported for the first time in Norway; Coproporus colchicus Kraatz, 1858, Acrotona parens, Acrotona pseudotenera, Falagrioma concinna, Bohemiellina flavipennis, Trichiusa immigrata Lohse, 1984, Heterothops stiglundbergi Israelson, 1979.