* p < 0.05
For the Smugawka stream, dominated by grasslands, N-NH4+ ranged from 0.04–0.96 mg·dm-3 (Table 1). For the Mszanka stream, P-PO43- ranged from 0.09–0.34 mg·dm-3 (Table 2). SAR demonstrated a correlation between P-PO43- concentrations and arable land in the Smugawka stream (Table 4) and permanent grasslands in the Mszanka stream (Table 5).