Abstract

A modified International Tundra Experiment (ITEX) was carried out on the glacier foreland of the Rotmoosferner (Otztal, Tyrol, Austria) to study the effects of changing the microclimate. Two early successional species (Trifolium pallescens, Poa alpina f. vivipara) and one late successional species (Carex curvula) were transplanted to open-top chambers (OTCs) and to control plots in 1996 and in 1998, respectively. The OTCs were left on the field site also during the winter. As a consequence, the snowmelt occurred at least one week earlier in the OTCs. Growth dynamics were followed over five and three year periods, respectively. The Trifolium and Poa plants were harvested in August 2000.

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