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Research article, 2015

Nytt i nya rödlistan

Sundberg, Sebastian; Aronsson, Mora; Dahlberg, Anders; Hallingbäck, Tomas; Knutsson, Tommy; Krikorev, Michael; Lönnell, Niklas; Thor, Göran

Abstract

The new Swedish Red List of vascular plants, bryophytes, algae, lichens and macrofungi is briefly presented. These groups now comprise more than 1800 red-listed species, corresponding to 21% of the assessed species. A net increase of 170 red-listed species since 2010 is mainly the result of more data to base the assessments on. For the first time, four sections in the plant genus Hieracium have been assessed, resulting in an addition of 327 apomictic plant species to the Red List. Logging of old-growth forest and overgrowth of former open and semi-open habitats (mainly because of ceased management of semi-natural habitats) are the stressors that harm most species, while eutrophication, drainage, water level regulation and exploitation are also important. The dieback of the elm species Ulmus glabra, U. minor, and ash Fraxinus excelsior, because of invasive pathogens, negatively affects many species of lichens, fungi and bryophytes being dependent on these host trees. In the forest landscape, the main challenge is to allow forestry without clear-cutting large areas and to maintain mixed stands regarding tree species and age distribution. In the agricultural landscape the challenge is to maintain and improve management by grazing and mowing in semi-natural grasslands, but also wooded areas, despite a continuous decline in the number of domestic cattle. In valuable wetlands and lakes, the negative impact of old ditches and water level regulation should be reduced. Species conservation in urban areas, like cities (lawns, parks and gardens), road verges and former sandpits, poses a promising challenge where much more could be done to improve the situation for red-listed species.

Published in

Svensk Botanisk Tidskrift
2015, Volume: 109, number: 3-4, pages: 188-207