## 4 Results
In class MAGNOLIOPSIDA, the family with the highest number of species was Lamiaceae (three species), and in class LILIOPSIDA, the families with the highest number of species were Characterae (five species), Cyperaceae (five species) and Potamogtonaceae (three species). The remaining families in both classes had scarce representation (one species each) (Table 8). The majority of the identified plant species belonged to the group of emerging macrophytes (EM, 22 species). Twelve species were included in the submerged macrophytes (SM) group, two species (_Lenna minor_, _Utricularia vulgaris_) belonged to the group of pleuston macrophytes (PM), and only one species (_Nymphae alba_) represented the group of floating macrophytes (FM) (Table 8). For both study seasons, the sector with the highest number of species was the peatbog-forest-recreational sector (PFR, 19 species (2007) and 26 species (2018)). The lowest number of species was found in the recreational-agricultural (RA) sector and the forest-recreational (FR) sector (9 species (2007) and 14 species (2018), respectively). The occurrence of four species (_Utricularia vulgaris_, _Ceratophyllum demersum_, _Mvirophyllum alternifolium_ and _Phragmites australis_) permanently occurring in all sectors of the littoral of Lake Piaseczno was determined for both study seasons. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Selected Indicators**} & \multicolumn{6}{c}{**Ecological Indicator Values**} & \multirow{2}{*}{**Stenobionts**} \\ \cline{2-2} \cline{4-7}  & **1** & **2** & **3** & **4** & **5** & **6** \\ \hline
**W**: soil moisture value & 0 & 15.31 & 59.57 & 37.87 & 32.76 & 5.95 & 52.34 \\
**Tr**: trophy value & 2.55 & 15.74 & 54.89 & 62.97 & 5.53 & 0 & 55.74 \\
**R**: soil(water) acidity(pH) value & 3.4 & 12.34 & 37.87 & 76.59 & 32.76 & 0 & 48.51 \\
**D**: soil granulometric value & 1.7 & 14.89 & 83.4 & 40.42 & 28.93 & 0 & **43.4** \\
**H**: organic matter content value & 7.23 & 75.74 & 35.31 & 0 & 0 & 0 & 81.7 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: The percentage shares of plant species with different habitat requirements in the flora (based on [PERSON] et al. 2002 [42]) of the study area in 2015 and 2018 (extreme values are marked with colours: yellow, min; orange, max). \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**CLASS**} & \multirow{2}{*}{**MAGNOLIOPSIDA**} & \multicolumn{4}{c}{**2007**} & \multicolumn{4}{c}{**2018**} & \multirow{2}{*}{**Group**} \\ \cline{2-2} \cline{4-7}  & & \multicolumn{3}{c}{**Sectors**} & & & **Sectors** & & \\ \hline
**Families** & _Species_ & **PFR** & **R** & **RA** & **FR** & **PFR** & **R** & **RA** & **FR** \\ \hline Asteraceae & _Bidens tripartite_ & & & & & + & + & & EM \\ \hline Boraginoaceae & _Myosotis palustris_ & + & & & + & & & EM \\ \hline  & _Lycopus europaeus_ & + & + & & + & + & & EM \\ Lamiaceae & _Mentha aquatic_ & & & & + & & & EM \\  & _Scutellaria galericulata_ & + & & & + & & & EM \\ \hline Lentibulariaceae & _Utricularia vulgaris_ & + & + & + & + & + & + & PM \\ \hline Lythracaceae & _Lythrum salicaria_ & + & & & + & & & EM \\ \hline Nymphaeaceae & _Nymphae alba_ & + & & & + & & & FM \\ \hline Plantaginaceae & _Rumex hydrolapathum_ & + & & & + & & & EM \\ \hline Primulaceae & _Lysymachia thyrsiflora_ & + & & + & & & EM \\ \hline Rubiaceae & _Galium palustre_ & & & & & + & & EM \\ \hline \hline \end{tabular}
\end{table} 
Table 7: The species composition of macrophytes of the littoral of Lake Piaseczno in 2007 and 2018 (EM, emerging macrophytes; SM, submerged macrophytes; FM, floating macrophytes; PM, pleuston macrophytes).