Figure 1

Figure 2

Figure 3

Means and standard deviations of the physicochemical water properties significantly differentiating the investigated lakes_ Results of ANOVA tests (F and p-values are indicated; degrees of freedom: 6 and 23)_ Results of post hoc analyses are indicated by means of capital letters_
| ANOVA | Jasne (n = 6) | Karskie (n = 6) | Malcz (n = 3) | Męckie (n = 6) | Niesłysz (n = 3) | Pierwsze (n = 3) | Złoty Potok (n = 3) | |
|---|---|---|---|---|---|---|---|---|
| O2 | F = 31.4 | A | BCD | A | BCD | C | D | D |
| Alkalinity | F = 345.8 | A | B | CD | C | D | E | F |
| Conductivity | F = 803.3 | A | B | C | C | A | D | A |
| Ca2+ | F = 1512.1 | A | B | C | C | D | E | A |
| Mg2+ | F = 61.3 | A | B | A | A | C | A | C |
| Hardness | F = 1433.5 | A | C | B | B | A | D | E |
Characteristics of the studied lakes (based on: Jańczak 1996; Pełechaty, Pukacz 2006; Pełechaty et al_ 2007)
| Unit | Jasne | Karskie | Malcz | Męckie | Niesłysz | Pierwsze | Złoty Potok | |
|---|---|---|---|---|---|---|---|---|
| Geographical coordinates | - | 52°17'7"N 15°03'06"E | 52°55'4"N 15°04'8"E | 52°21'1”N 15°13'3"E | 52°22'0"N 15°11'2"E | 52°13'9"N 15°23'8"E | 52°23'11”N 15°09'18"E | 52°13'0"N 15°22'5"E |
| Surface area | ha | 15.1 | 150 | 36.2 | 40.9 | 486.2 | 19.3 | 32.8 |
| Mean depth | m | 4.3 | 6.2 | 3.4 | 9.2 | 7.8 | 4.7 | 5.9 |
| Max depth | m | 9.5 | 17.6 | 7.3 | 22.7 | 34.7 | 10.7 | 13.7 |
| Lake type | - | outflow | flow | no flows | flow | no flows | no flows | no flows |
| Stratification | - | incomplete | complete | incomplete | complete | complete | incomplete | complete |
| SD visibility | m | 3 | 3.1 | 3.8 | 6.5 | 4.2 | 5.4 | 4.3 |
| C. tomentosa sampling depth | m | 3 | 3 | 3 | 2 | 2 | ||
| C. globularis sampling depth | m | 4 | 3 | 3 | 4 | 4 |
Significant correlations between the dry weight and calcium carbonate content of each charophyte species and the habitat characteristics of the study sites_ For each characteristic n = 15 (DW and % CaCO3 were represented by mean of 10)_ The asterisks (*) indicate the significance level (< 0_05, < 0_01, < 0_001, respectively)
| Chara globularis | Chara tomentosa | |||
|---|---|---|---|---|
| Dry weight | % CaCO3 | Dry weight | % CaCO3 | |
| Temperature | 0.61* | |||
| -0.53* | ||||
| Conductivity | -0.63** | |||
| Alkalinity | -0.59* | -0.59* | ||
| Ca2+ | -0.88*** | |||
| Mg2+ | -0.55* | |||
| Hardness | -0.75*** | |||
| TP | 0.73** | |||
| Sampling depth | 0.69** | |||
| % bottom cover | 0.72** | |||
| No. of species | -0.58* | |||