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1 April 2012 Long-Term Effects of Scrub Clearance and Litter Removal on the Re-Establishment of Dry Alvar Grassland Species
Jan P. Bakker, Eje Rosén, Wim A. Ozinga, Mario Bretfeld, Tobias Feldt, Julia Stahl
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Abstract

Many characteristic dry alvar grassland species disappear after cessation of livestock grazing as a result of encroachment by Juniperus communis. We studied the re-establishment of these species after scrub clearance with and without the removal of the layer of litter and mosses in long-term (14 years) permanent plots. Most of the species belonging to the community species pool of dry alvar grassland species before clearance were found in permanent plots between 2 and 14 years after the clearance. A large part originated from vegetative spread of already occurring species in the established vegetation in the surroundings. Only a small part of the long-term persistent soil seed bank resulted in the re-establishment of alvar species. There was no significant difference in the traits soil seed bank, seed weight and long-distance dispersal by wind, dung or fur of animals of established and non-established species. Removal of litter and mosses positively affected the re-establishment of alvar species.

© Finnish Zoological and Botanical Publishing Board 2012
Jan P. Bakker, Eje Rosén, Wim A. Ozinga, Mario Bretfeld, Tobias Feldt, and Julia Stahl "Long-Term Effects of Scrub Clearance and Litter Removal on the Re-Establishment of Dry Alvar Grassland Species," Annales Botanici Fennici 49(2), 21-30, (1 April 2012). https://doi.org/10.5735/085.049.0104
Received: 27 July 2011; Accepted: 27 October 2011; Published: 1 April 2012
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