Water quality, sediment properties and submerged vegetation characteristics (mean ± standard deviation) among site types in lakesa.
| Abbreviation | Mesotrophic sites (N = 6) | Eutrophic sites (N = 21) | Hypertrophic sites (N = 8) | |
|---|---|---|---|---|
| Water quality | ||||
| Depth (m) | 2.02 ± 0.87 | 2.26 ± 0.64 | 2.24 ± 0.77 | |
| Secchi depth (m) | SD | 1.22 ± 0.19a | 0.95 ± 0.36a | 0.35 ± 0.20b |
| Total organic carbon (mg L−1) | TOC | 6.57 ± 1.32 | 6.33 ± 1.42 | 7.52 ± 1.55 |
| Total nitrogen (mg L−1) | TN | 0.93 ± 0.22 | 0.96 ± 0.45 | 1.13 ± 0.41 |
| Total phosphorus (mg L−1) | TP | 0.01 ± 0.00b | 0.06 ± 0.06b | 0.23 ± 0.15a |
| Chlorophyll-a (mg m−3) | Chl-a | 12.00 ± 9.21b | 16.15 ± 9.25b | 58.00 ± 15.78a |
| Trophic state index | TSI | 43.34 ± 3.98c | 58.67 ± 5.05b | 75.95 ± 3.58a |
| Sediment properties | ||||
| Moisture (%) | 69.69 ± 5.17a | 66.29 ± 7.84a | 56.69 ± 6.95b | |
| Density (g cm−3) | 1.12 ± 0.05b | 1.24 ± 0.14b | 1.40 ± 0.09a | |
| Sediment total carbon (mg g−1) | STC | 30.40 ± 20.86 | 27.97 ± 26.31 | 27.25 ± 14.10 |
| Sediment total nitrogen (mg g−1) | STN | 2.36 ± 1.34 | 2.15 ± 1.56 | 2.02 ± 0.69 |
| Sediment ammonia (mg kg−1) | NH4+ | 1.03 ± 0.44 | 0.90 ± 0.38 | 0.76 ± 0.21 |
| Sediment nitrate (mg kg−1) | NO3− | 0.16 ± 0.12 | 0.59 ± 0.65 | 0.51 ± 0.55 |
| Vegetation characteristics | ||||
| Richness | 4.17 ± 1.17a | 2.43 ± 2.23a | 0.00 ± 0.00b | |
| Biomass (g m−2) | 1688 ± 761a | 508 ± 328b | 0.00 ± 0.00b | |
a
Mean ± standard deviation followed by different lowercase letters indicates significant difference (P < 0.05) among site types.