Epilithic Diatom Community Shows a Higher Vulnerability of the River Sava to Pollution during the Winter
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Sampling Sites
2.3. Measurements of Abiotic Parameters
2.4. Periphyton Sampling and Laboratory Analyses
2.5. Data Analysis
3. Results
3.1. Influence of Environmental Parametres on the Composition of the Diatom Community
3.2. Water Quality along the Course and between the Seasons
3.3. The Structure of the Diatom Community
Ecological Groups of Diatoms
4. Discussion
4.1. Influence of Environmental Parametres on the Composition of Epilithic Diatom Community
4.2. Water Quality along the Course and between the Seasons
Differences between Winter and Summer
4.3. The Structure of the Diatom Community
4.3.1. The Dominance of Taxa
4.3.2. Ecological Groups
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Appendix A
Sample | Max. Velocity (m/s) | T Water (°C) | pH | Conductivity (µS/cm) | [O2] | Sat. with O2 (%) | TDS | PO4–P | TN | NH4–N | NO3–N |
---|---|---|---|---|---|---|---|---|---|---|---|
ZE.w | 0.76 | 4.8 | 7.2 | 262 | 10.4 | 83 | 258 | 0.03 | 1.11 | 0.03 | 0.86 |
ZE.s | 1.20 | 8.1 | 7.1 | 254 | 8.0 | 79 | 250 | 0.00 | 0.79 | 0.02 | 0.31 |
DO.w | 1.70 | 7.2 | 7.8 | 278 | 12.0 | 98 | 273 | 0.23 | 0.59 | 0.03 | 0.42 |
DO.s | 1.74 | 10.2 | 7.5 | 263 | 9.9 | 95 | 256 | 0.00 | 0.35 | 0.02 | 0.44 |
OT.w | 1.33 | 6.5 | 8.0 | 310 | 14.3 | 111 | 304 | 0.00 | 1.12 | 0.03 | 0.72 |
OT.s | 1.39 | 16.5 | 8.0 | 280 | 10.9 | 117 | 276 | 0.14 | 0.86 | 0.03 | 0.71 |
ST.w | 1.38 | 6.9 | 8.0 | 327 | 14.7 | 114 | 321 | 0.76 | 0.92 | 0.02 | 0.72 |
ST.s | 1.53 | 18.3 | 8.0 | 300 | 10.0 | 110 | 297 | 0.01 | 0.84 | 0.03 | 0.55 |
ŠE.w | 0.93 | 7.9 | 7.5 | 376 | 13.1 | 100 | 356 | 0.01 | 1.46 | 0.04 | 1.26 |
ŠE.s | 0.37 | 17.2 | 7.6 | 340 | 10.1 | 104 | 329 | 0.00 | 1.09 | 0.04 | 0.81 |
KR.w | 0.87 | 7.2 | 7.5 | 392 | 13.0 | 98 | 385 | 0.14 | 3.13 | 0.08 | 1.59 |
KR.s | 0.83 | 18.5 | 7.8 | 363 | 10.7 | 116 | 357 | 0.03 | 1.44 | 0.06 | 1.15 |
PO.w | 0.94 | 7.2 | 7.5 | 392 | 13.0 | 96 | 385 | 0.01 | 1.41 | 0.08 | 1.16 |
PO.s | 0.85 | 20.1 | 7.9 | 370 | 11.0 | 123 | 365 | 0.06 | 1.38 | 0.05 | 1.00 |
KK.w | 0.15 | 8.1 | 7.6 | 391 | 13.0 | 96 | 385 | 0.53 | 1.76 | 0.05 | 1.41 |
KK.s | 0.04 | 22.3 | 8.1 | 359 | 11.7 | 133 | 354 | 0.01 | 0.72 | 0.02 | 0.73 |
JE.w | 0.06 | 8.5 | 7.5 | 406 | 13.0 | 99 | 398 | 0.20 | 2.35 | 0.04 | 1.43 |
JE.s | 0.59 | 26.3 | 8.1 | 363 | 10.7 | 132 | 357 | 0.23 | 1.38 | 0.04 | 0.99 |
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Quality Index | Ecological Groups | |||||
---|---|---|---|---|---|---|
TI | SI | LP | HP | M | PL | |
Altitude | −0.660 | −0.784 | −0.552 | |||
Distance from the source | 0.660 | 0.784 | 0.552 | |||
Channel width | 0.776 | 0.743 | −0.554 | 0.659 | ||
Periphyton dry mass | 0.550 | |||||
Current velocity | −0.546 | |||||
T water | −0.593 | |||||
Conductivity | 0.717 | 0.792 | 0.676 | |||
PO4–P | 0.533 | 0.497 | ||||
TDS | 0.771 | 0.839 | −0.473 | 0.721 | ||
TN | 0.530 | 0.548 | 0.604 | |||
NH4–N | 0.520 | 0.551 | 0.481 | |||
NO3–N | 0.589 | 0.638 | 0.611 |
Winter Samples Average | p-Value | Summer Samples Average | |
---|---|---|---|
Parameter: | |||
Water temperature (°C) | 7.1 | <0.001 | 17.5 |
Conductivity (µS/cm) | 348 | <0.001 | 321 |
TDS (mg/L) | 341 | <0.001 | 316 |
TN (mg/L) | 1.54 | 0.017 | 0.98 |
NH4–N (mg/L) | 0.39 | 0.048 | 0.03 |
NO3––N (mg/L) | 1.06 | 0.005 | 0.74 |
[O2] (mg/L) | 12.9 | <0.001 | 10.3 |
O2 saturation (%) | 99 | 0.050 | 112 |
SI | 2.22 | 0.043 | 1.93 |
Species number | 36.1 | 0.003 | 26.6 |
Shannon diversity index | 3.70 | 0.012 | 2.94 |
ZE | DO | OT | ST | ŠE | KR | PO | KK | JE | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Taxa | w | s | w | s | w | s | w | s | w | s | w | s | w | s | w | s | w | s |
Achnanthidium minutissimum | 41 | 51 | 30 | 48 | 23 | 41 | 22 | 38 | 30 | 26 | 16 | 27 | 16 | 36 | ||||
Achnanthidium pyrenaicum | 20 | 21 | 25 | 35 | 13 | 38 | 12 | 37 | 29 | 14 | 17 | 24 | 42 | |||||
Encyonema minutum | 15 | 10 | 17 | |||||||||||||||
Gomphonema tergestinum | 15 | 32 | ||||||||||||||||
Navicula lanceolata | 17 | 27 | ||||||||||||||||
Nitzschia fonticola | 15 | 13 | ||||||||||||||||
Cyclotella meneghiniana | 42 | |||||||||||||||||
Amphora pediculus | 20 | |||||||||||||||||
Surirella minuta | 11 | |||||||||||||||||
Navicula reichardtiana | 7 | |||||||||||||||||
Cocconeis placentula | 17 | |||||||||||||||||
Diatoma ehrenbergii | 13 | |||||||||||||||||
Mayamaea atomus | 10 | |||||||||||||||||
Nitzschia gracilis | 10 |
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Zelnik, I.; Sušin, T. Epilithic Diatom Community Shows a Higher Vulnerability of the River Sava to Pollution during the Winter. Diversity 2020, 12, 465. https://0-doi-org.brum.beds.ac.uk/10.3390/d12120465
Zelnik I, Sušin T. Epilithic Diatom Community Shows a Higher Vulnerability of the River Sava to Pollution during the Winter. Diversity. 2020; 12(12):465. https://0-doi-org.brum.beds.ac.uk/10.3390/d12120465
Chicago/Turabian StyleZelnik, Igor, and Tjaša Sušin. 2020. "Epilithic Diatom Community Shows a Higher Vulnerability of the River Sava to Pollution during the Winter" Diversity 12, no. 12: 465. https://0-doi-org.brum.beds.ac.uk/10.3390/d12120465