Alien pests and their influence on native biota in leaf litter of non-native trees

Non-native trees have been introduced into Europe for hundreds of years. Some have become an important part of the human diet, and many have aesthetic value. Nevertheless, some of them became aliens and host other alien species that might have undesirable effects on native organisms. We studied the possible effects of an alien-alien relationship (formed by the Horse-chestnut tree, Aesculus hippocastanum, and the Horse-chestnut leaf miner, Cameraria ohridella) on litter-dwelling invertebrates in the Czech Republic.