## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{3}{c}{**Tukey’s WSD Test**} \\  & \multicolumn{3}{c}{**Group 1: Lake Jeziory Wielkie**} \\  & \multicolumn{3}{c}{**Group 2: Lake Lekno**} \\ \cline{2-6}
**Factor** & \multicolumn{3}{c}{**Average of**} & \multicolumn{3}{c}{**Average of**} & \multicolumn{1}{c}{**t**} & \multicolumn{1}{c}{**df**} & \multicolumn{1}{c}{\(p\)**} \\  & \multicolumn{3}{c}{**Group 1**} & \multicolumn{1}{c}{**Group 2**} & \multicolumn{1}{c}{**t**} & \multicolumn{1}{c}{**df**} & \multicolumn{1}{c}{\(p\)**} \\ \hline Depth [m] & 3.14 & 2.35 & 1.319 & 19 & 0.203 \\ \hline Distance from the shore [m] & 94.60 & 70.67 & 0.985 & 19 & 0.337 \\ \hline pH average [-] & 8.17 & 7.22 & 4.350 & 19 & 0.000 \({}^{*}\) \\ \hline org-P average [mg dm\({}^{-3}\)] & 0.53 & 0.06 & 2.956 & 19 & 0.008 \({}^{*}\) \\ \hline ALP average [\(\mathrm{\SIUnitSymbolMicro g}\) p-n g\({}^{-1}\) h\({}^{-1}\)] & 637.57 & 2818.09 & \(-\)2.894 & 19 & 0.009 \({}^{*}\) \\ \hline ACP average [\(\mathrm{\SIUnitSymbolMicro g}\) p-n g\({}^{-1}\) h\({}^{-1}\)] & 745.41 & 2188.69 & \(-\)2.637 & 19 & 0.016 \({}^{*}\) \\ \hline pH\_spr [-] & 8.19 & 7.08 & 4.666 & 19 & 0.000 \({}^{*}\) \\ \hline pH\_sum [-] & 8.05 & 7.13 & 4.118 & 19 & 0.001 \({}^{*}\) \\ \hline org-P\_spr [mg dm\({}^{-3}\)] & 0.69 & 0.07 & 2.455 & 19 & 0.024 \({}^{*}\) \\ \hline org-P\_sum [mg dm\({}^{-3}\)] & 0.37 & 0.04 & 2.605 & 19 & 0.017 \({}^{*}\) \\ \hline ALP\_spr [\(\mathrm{\SIUnitSymbolMicro g}\) p-n g\({}^{-1}\) h\({}^{-1}\)] & 236.41 & 1567.55 & \(-\)3.788 & 19 & 0.001 \({}^{*}\) \\ \hline ALP\_sum [\(\mathrm{\SIUnitSymbolMicro g}\) p-n g\({}^{-1}\) h\({}^{-1}\)] & 1038.73 & 4068.64 & \(-\)2.401 & 19 & 0.027 \({}^{*}\) \\ \hline ACP\_spr [\(\mathrm{\SIUnitSymbolMicro g}\) p-n g\({}^{-1}\) h\({}^{-1}\)] & 483.60 & 989.87 & \(-\)1.549 & 19 & 0.138 \\ \hline ACP\_sum [\(\mathrm{\SIUnitSymbolMicro g}\) p-n g\({}^{-1}\) h\({}^{-1}\)] & 1007.21 & 3387.51 & \(-\)2.656 & 19 & 0.016 \({}^{*}\) \\ \hline \hline \end{tabular} \(n\) = 15 in group 1; \(n\) = 6 in group 2; and \({}^{*}\) denotes significant differences between means in columns according to the post hoc [PERSON]’s WSD test.  
\end{table} 
Table 3: Researched factors in Lake Jeziory Wielkie and Lake Lekno. organic phosphorus content in the overlying water only in the type of forest catchment. An analysis of the projection of variables onto the factor plane revealed a negative correlation between these parameters, where the angle between the vectors representing the primary variables is observed to be close to 180 degrees. This analysis highlights that an increase in org-P content in a lake within a forest catchment area (with an autochthonous source of org-P) will lead to a decrease in the enzymatic content of ALP and ACP. In the study by [PERSON] et al. [37], higher levels of ALP were shown to occur during nutrient delivery from rivers, indicating that changes in anthropogenic nutrient loads can significantly influence the phosphorus status in water. This finding suggests that the number of org-P may affect the levels of the alkaline enzyme. Additionally, [PERSON] et al. [38] showed a strong correlation between the content of phosphorus and ALP in soil samples.