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  • 1 University of Padova Department of Land and Agroforest Environments Viale dell’Università 16 I-35020 Legnaro, Padova Italy
  • | 2 University of Padova Department of Environmental Agronomy and Crop Production Viale dell’Università 16 35020 Legnaro, Padova Italy
  • | 3 CRA-MPF Forest and Range Management Research Institute Nicolini 6 38050 Trento Italy
  • | 4 Edmund Mach Foundation CTT via E. Mach 1 38010 San Michele all’Adige, Trento Italy
  • | 5 University of South Bohemia Department of Botany, Faculty of Science Branišovská 31 CZ-37005 České Budějovice Czech Republic
  • | 6 Institute of Entomology of Biological Centre CAS Branišovská 31 CZ-370 05 České Budějovice Czech Republic
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We studied the floristic composition in the pastures of the Southern Alps (Trento Province, Italy). One hundred and five plots in seven different pasture plant communities were sampled: (1) nitrophilous, (2) montane mesic, (3) subalpine mesic, (4) calcareous montane, (5) calcareous subalpine, (6) acid montane, and (7) acid subalpine pastures. Forward selection and variation partitioning were applied to identify the most important factors controlling the species composition and plant traits in the pastures. Aggregated weighted averages were calculated for each plot using the published values of average height, specific leaf area, and seed mass for each species. Explanatory variables were recorded for each site to reflect climate, soil properties, and grazing pressure. We hypothesised that species composition and functional variation in pastures of the Southern Alps are controlled by three main environmental filters: climate, resource availability, and grazing pressure. We found that variables of climate and soil properties had a major role in explaining the species composition and variations in plant traits, while grazing pressure showed a lower independent effect. Species composition and plant traits depended mainly on temperature, soil fertility, and variables of bedrock type — soil pH. Our results confirm the importance of taking the effects of climate and resource availability into account when describing plant and community functions of grasslands.

Supplementary Materials

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