Plant responses to fertilization and species removal in tundra related to community structure and clonality.

摘要: A range of tundra plant communities were experimentally perturbed in 1984 by 1) application NPK-fertilizer to three stable and two frost-heaved sites 2) removal the dominant deciduous shrubs from sites. Effects on vertically projected area (PPA) plots unperturbed controls measured point intercepts 1985, 1986 1988. There no significant changes PPA vascular plants bryophytes control during 1984-1988, few among lichens. Fertilization increased strongly, reduced lichens or bryophytes. The only species declined, whereas that 21 (...)