Bogactwo flory naczyniowej a wskaźniki synantropizacji w dolinie rzecznej na przykładzie dolnego Sanu

The paper presents spatial variation in floristic indices in the mediumsize valley of the San River. Indices of species richness and synanthropization rates were calculated for 366 1 x 1 km cartogram squares. The Spearman rank correlation coefficient was used to analyze the relationships between individual indices. Species richness in individual basic plots ranges from 102 to 391, with a mean of 248. The share of anthropophytes ranges from 0.9% to 35.5% , with a mean of 18.1%. In general, the flora of the present valley floor is characterized by a higher species richness and a higher anthropophytization rate than glacial terrace. There was a positive correlation between species richness and the number of anthropophytes present, but no correlation between species richness and the anthropophytization rate. In individual basic plots, their values can be very divergent.