Impact of troublesome expansive weed <i>Rumex alpinus</i> on species diversity of mountain pastures in Tatra National Park, Poland.

This difference was highly significant ( V = 1.5, p < 0.001, n = 55).

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With an increase in elevation, there was a slight trend of increase in all diversity measures, both for invaded and uninvaded plots, with the exception of mean number of species per plot (Fig. 4 a), which was almost constant across all elevations.

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