Vegetation and environmental factors during primary succession on glacier forelands: Some outlines from the Italian Alps |
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Authors: | Carlo Andreis Marco Caccianiga Bruno Cerabolini |
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Institution: | 1. Dipartimento di Biologia, Sezione di Botanica Sistematica , Università degli Studi di Milano , via Celoria 26, Milano, I-20133, Italy;2. Dipartimento di Biologia Strutturale e Funzionale , Università degli Studi dell'Insubria , via Dunant 3, Varese, I-21100, Italy |
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Abstract: | ABSTRACT Relationships between plant communities and the physical environment during primary succession on recently deglaciated glacier forelands were studied in 3 areas of the Italian Alps. The aim of the research was to relate traditional phytosociological data with environmental variables. Twenty-eight phytosociological relevés were performed, each associated with twenty-six environmental variables; quantitative parameters of richness and diversity were also calculated. Species/relevés, environmental variables/relevés and species/environmental variables matrices were analyzed by cluster analysis, PCA and Spearman correlation coefficient. Three main stages of succession were identified by floristic composition and confirmed by environmental parameter evaluation. A complex of environmental variables seems to be closely correlated with terrain age and richness/diversity parameters, even though diversity decreases in late successional stages. The phytosociological significance of species is in accordance with their position in the context of succession. |
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Keywords: | Glacier foreland vegetation Italian Alps Phytosociology Primary succession |
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